{"id":3954,"date":"2026-09-05T08:42:57","date_gmt":"2026-09-05T00:42:57","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=3954"},"modified":"2026-09-05T08:42:57","modified_gmt":"2026-09-05T00:42:57","slug":"android-%e6%8e%a7%e4%bb%b6%e7%be%8e%e5%8c%96%e5%ae%9e%e6%88%98%ef%bc%9ashape%e3%80%81selector-%e4%b8%8e-layer-list","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=3954","title":{"rendered":"Android \u63a7\u4ef6\u7f8e\u5316\u5b9e\u6218\uff1aShape\u3001Selector \u4e0e layer-list"},"content":{"rendered":"
\n

<\/h1>\n
\n

\u9002\u7528\u73af\u5883\uff1aAndroid Studio + Java\uff08\u65e0 Kotlin\u3001\u65e0 AndroidX \u4f9d\u8d56\uff09\uff0cminSdk 14+
\n\u9605\u8bfb\u6536\u83b7\uff1a3 \u5f20\u901f\u67e5\u8868 + 26 \u4e2a\u53ef\u76f4\u63a5\u590d\u5236\u7684\u793a\u4f8b + 1 \u5957\u5b8c\u6574\u8ba1\u7b97\u5668\u76ae\u80a4<\/strong><\/p>\n<\/blockquote>\n

\n

\u4e00\u3001\u5148\u641e\u6e05\u695a\uff1a\u4e3a\u4ec0\u4e48\u8981\u5b66\u8fd9\u4e09\u4e2a\u4e1c\u897f<\/span><\/h2>\n

\u65b0\u5efa\u4e00\u4e2a Button<\/code>\uff0cAndroid \u7ed9\u7684\u9ed8\u8ba4\u957f\u76f8\u662f\u8fd9\u6837\uff1a\u7070\u5e95\u3001\u76f4\u89d2\u3001\u6309\u4e0b\u65f6\u4e00\u5c42\u7070\u8499\u8499\u7684\u6548\u679c\u3002
\n\u4ea7\u54c1\u540c\u5b66\u770b\u4e00\u773c\u5c31\u4f1a\u8bf4\uff1a”\u80fd\u4e0d\u80fd\u505a\u6210\u5706\u89d2\u7684\uff1f\u6309\u4e0b\u53bb\u80fd\u4e0d\u80fd\u53d8\u8272\uff1f<\/strong>“<\/p>\n

\u8fd9\u5c31\u662f Shape\u3001Selector\u3001layer-list \u5b58\u5728\u7684\u7406\u7531\u3002\u5b83\u4eec\u4e09\u4e2a\u7684\u5206\u5de5\u975e\u5e38\u6e05\u6670\uff1a<\/p>\n\n\n\n\n\n\n\n
\u89d2\u8272<\/th>\n\u56de\u7b54\u7684\u95ee\u9898<\/th>\n\u7c7b\u6bd4<\/th>\n<\/tr>\n<\/thead>\n
Shape<\/strong><\/td>\n\u8fd9\u4e2a\u63a7\u4ef6\u957f\u4ec0\u4e48\u6837<\/strong>\uff1f\uff08\u5706\u89d2\uff1f\u6e10\u53d8\uff1f\u63cf\u8fb9\uff1f\uff09<\/td>\n\u753b\u7b14\u753b\u51fa\u7684”\u4e00\u5f20\u56fe”<\/td>\n<\/tr>\n
Selector<\/strong><\/td>\n\u4e0d\u540c\u72b6\u6001<\/strong>\u4e0b\u7528\u54ea\u5f20\u56fe\uff1f\uff08\u6309\u4e0b\uff1f\u9009\u4e2d\uff1f\u7981\u7528\uff1f\uff09<\/td>\n\u4e00\u5f20”\u72b6\u6001 \u2192 \u56fe”\u7684\u5bf9\u7167\u8868<\/td>\n<\/tr>\n
layer-list<\/strong><\/td>\n\u591a\u5f20\u56fe\u600e\u4e48\u53e0<\/strong>\u5728\u4e00\u8d77\uff1f\uff08\u9634\u5f71\u3001\u5355\u8fb9\u7ebf\u3001\u53cc\u5c42\u8fb9\uff09<\/td>\n\u591a\u5f20\u900f\u660e\u80f6\u7247\u53e0\u653e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u53e3\u8bc0\u8bb0\u4e00\u53e5\u5c31\u591f\uff1a<\/p>\n

\n

Shape \u753b\u5f62\uff0cSelector \u7ba1\u6001\uff0clayer-list \u53e0\u52a0\u3002<\/strong><\/p>\n<\/blockquote>\n

\n

\u4e8c\u3001Drawable \u8d44\u6e90\uff1a\u5b83\u4eec\u4f4f\u5728\u54ea\u91cc<\/span><\/h2>\n

\u4e09\u4e2a\u4e1c\u897f\u672c\u8d28\u4e0a\u90fd\u662f Drawable \u8d44\u6e90<\/strong>\uff0c\u7edf\u4e00\u653e\u5728 res\/drawable\/<\/code> \u76ee\u5f55\u4e0b\uff08\u65e9\u671f\u5de5\u7a0b\u4e5f\u53ef\u80fd\u53eb res\/drawable-xxhdpi<\/code>\uff0c\u4e0d\u63a8\u8350\uff09\u3002<\/p>\n

<\/section>\n
app\/src\/main\/res\/\n\u00a0\u00a0drawable\/\n\u00a0\u00a0bg_display.xml\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2190\u00a0Shape\n\u00a0\u00a0sel_key_num.xml\u00a0\u00a0\u00a0\u00a0\u00a0\u2190\u00a0Selector\n\u00a0\u00a0bg_card_shadow.xml\u00a0\u00a0\u00a0\u00a0\u2190\u00a0layer-list\n\u00a0\u00a0color\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u2190\u00a0\u989c\u8272\u72b6\u6001\u9009\u62e9\u5668\uff08\u7b2c\u4e94\u8282\u4f1a\u8bb2\uff09\n\u00a0\u00a0sel_text_color.xml\n\u00a0\u00a0values\/\n\u00a0\u00a0colors.xml\n<\/code><\/pre>\n
\u5f15\u7528\u65b9\u5f0f\uff08\u4e24\u79cd\uff0c\u5fc5\u987b\u4f1a\u80cc\uff09\uff1a<\/strong><\/p>\n
<\/section>\n
<!--\u00a0XML\u00a0\u4e2d\uff1a@drawable\/\u6587\u4ef6\u540d\uff08\u4e0d\u5e26\u00a0.xml\u00a0\u540e\u7f00\uff09\u00a0--><\/span>\n<Button<\/span>\n\u00a0\u00a0android:layout_width<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:layout_height<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:background<\/span>=\"@drawable\/sel_key_num\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
<\/section>\n
\/\/\u00a0Java\u00a0\u4e2d\uff1aR.drawable.\u6587\u4ef6\u540d<\/span>\nButton<\/span>\u00a0btnNum<\/span>\u00a0=<\/span>\u00a0(Button)\u00a0findViewById(R.id.btn_7);\nbtnNum.setBackgroundResource(R.drawable.sel_key_num);\n\n\/\/\u00a0\u6216\u62ff\u5230\u00a0Drawable\u00a0\u5bf9\u8c61\uff08\u8001\u00a0API\uff09<\/span>\nDrawable<\/span>\u00a0d<\/span>\u00a0=<\/span>\u00a0getResources().getDrawable(R.drawable.sel_key_num);\n<\/code><\/pre>\n
\u4e24\u6761\u5de5\u7a0b\u89c4\u8303\uff08\u4ece\u7b2c\u4e00\u5929\u5c31\u8981\u517b\u6210\uff09\uff1a<\/strong><\/p>\n
    \n
  1. \n
    \u6587\u4ef6\u540d\u5168\u5c0f\u5199 + \u4e0b\u5212\u7ebf<\/strong>\uff0c\u5982 bg_key_num_normal.xml<\/code>\uff0c\u4e0d\u8981\u51fa\u73b0\u5927\u5199\u548c\u4e2d\u6587\u3002<\/section>\n<\/li>\n
  2. \n
    \u989c\u8272\u4e00\u5f8b\u5199\u8fdb res\/values\/colors.xml<\/code> \u518d\u7528 @color\/xxx<\/code> \u5f15\u7528<\/strong>\uff0c\u4e0d\u8981\u5728 shape \u91cc\u786c\u7f16\u7801 #455A64<\/code>\u3002\u6539\u4e3b\u9898\u65f6\u4f60\u4f1a\u611f\u8c22\u81ea\u5df1\u3002<\/section>\n<\/li>\n<\/ol>\n
    \n
    \u4e09\u3001Shape \u7bc7\uff1a\u7528 XML \u753b\u5f62\u72b6<\/span><\/h2>\n
    3.1 \u6574\u4f53\u9aa8\u67b6<\/h3>\n
    \u793a\u4f8b 1\uff1aShape \u7684\u6807\u51c6\u9aa8\u67b6<\/strong><\/p>\n
    res\/drawable\/demo_shape_skeleton.xml<\/code><\/p>\n
    <\/section>\n
    <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u2460\u00a0\u586b\u5145\u8272\u00a0--><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/num_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u2461\u00a0\u6e10\u53d8\uff08\u4e0e\u00a0solid\u00a0\u4e8c\u9009\u4e00\uff09\u00a0--><\/span>\n\u00a0\u00a0<!--\u00a0<gradient\u00a0...\u00a0\/>\u00a0--><\/span>\n\u00a0\u00a0<!--\u00a0\u2462\u00a0\u63cf\u8fb9\u00a0--><\/span>\n\u00a0\u00a0<stroke<\/span>\n\u00a0\u00a0\u00a0\u00a0android:width<\/span>=\"1dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:color<\/span>=\"@color\/fun_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u2463\u00a0\u5706\u89d2\u00a0--><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u2464\u00a0\u5185\u8fb9\u8ddd\u00a0--><\/span>\n\u00a0\u00a0<padding<\/span>\n\u00a0\u00a0\u00a0\u00a0android:left<\/span>=\"8dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:top<\/span>=\"8dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"8dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u2465\u00a0\u56fa\u6709\u5c3a\u5bf8\u00a0--><\/span>\n\u00a0\u00a0<!--\u00a0<size\u00a0android:width=\"48dp\"\u00a0android:height=\"48dp\"\u00a0\/>\u00a0--><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \u5173\u952e\u70b9<\/strong>\uff1a\u6839\u8282\u70b9 <shape><\/code> \u53ea\u6709\u4e00\u4e2a\u6838\u5fc3\u5c5e\u6027 android:shape<\/code>\uff0c\u5b50\u8282\u70b9\u5171 6 \u4e2a\uff0c\u5168\u90e8\u53ef\u9009\u3002\u5b50\u8282\u70b9\u4e66\u5199\u987a\u5e8f\u4e0d\u5f71\u54cd\u6548\u679c\uff0c\u4f46\u5f71\u54cd”\u8986\u76d6\u5173\u7cfb”<\/strong>\uff08\u89c1 3.8 \u6613\u9519\u70b9\uff09\u3002<\/p>\n
    \n
    3.2 android:shape<\/code>\uff1a\u56db\u79cd\u5f62\u72b6<\/h3>\n
    \u793a\u4f8b 2\uff1a\u77e9\u5f62\uff08rectangle\uff0c\u9ed8\u8ba4\u503c\uff0c\u6700\u5e38\u7528\uff09<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#455A64\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \u793a\u4f8b 3\uff1a\u692d\u5706\uff08oval\uff09\u2014\u2014 \u5706\u5f62\u5934\u50cf\u3001\u5706\u70b9\u6307\u793a\u5668<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"oval\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#E53935\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u60f3\u753b\u6b63\u5706\uff1a\u8ba9\u63a7\u4ef6\u7684\u00a0layout_width\u00a0\u4e0e\u00a0layout_height\u00a0\u76f8\u7b49\u5373\u53ef\u00a0--><\/span>\n\u00a0\u00a0<size<\/span>\u00a0android:width<\/span>=\"56dp\"<\/span>\u00a0android:height<\/span>=\"56dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \n
    \u63d0\u793a\uff1aoval<\/code> \u753b\u7684\u662f”\u5185\u5207\u692d\u5706”\u3002\u63a7\u4ef6\u662f\u6b63\u65b9\u5f62\u5c31\u5f97\u5230\u6b63\u5706\uff0c\u662f\u957f\u65b9\u5f62\u5c31\u5f97\u5230\u692d\u5706<\/strong>\u2014\u2014\u6240\u4ee5\u5706\u5f62\u5934\u50cf\u8981\u4fdd\u8bc1\u5bbd\u9ad8\u76f8\u7b49\uff0c\u7528 size<\/code> \u53ea\u662f\u7ed9\u5b83\u4e00\u4e2a\u56fa\u6709\u5c3a\u5bf8\uff0c\u6700\u7ec8\u8fd8\u662f\u4ee5\u63a7\u4ef6\u5b9e\u9645\u5927\u5c0f\u4e3a\u51c6\u3002<\/p>\n<\/blockquote>\n
    \u793a\u4f8b 4\uff1a\u76f4\u7ebf\uff08line\uff09\u2014\u2014 \u5206\u9694\u7ebf<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"line\"<\/span>><\/span>\n\u00a0\u00a0<stroke<\/span>\n\u00a0\u00a0\u00a0\u00a0android:width<\/span>=\"1dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:color<\/span>=\"#BDBDBD\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:dashWidth<\/span>=\"6dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:dashGap<\/span>=\"4dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0line\u00a0\u5fc5\u987b\u914d\u00a0stroke\uff0c\u5426\u5219\u4ec0\u4e48\u90fd\u770b\u4e0d\u89c1\u00a0--><\/span>\n\u00a0\u00a0<size<\/span>\u00a0android:height<\/span>=\"1dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \u793a\u4f8b 5\uff1a\u73af\u5f62\uff08ring\uff09\u2014\u2014 \u52a0\u8f7d\u5708\u3001\u8fdb\u5ea6\u73af<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"ring\"<\/span>\n\u00a0\u00a0android:innerRadius<\/span>=\"20dp\"<\/span>\u00a0\u00a0\u00a0<!--<\/span>\u00a0\u5185\u5706\u534a\u5f84<\/span>\u00a0--<\/span>><\/span>\n\u00a0\u00a0android:thickness=\"6dp\"\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u73af\u7684\u539a\u5ea6\u00a0--><\/span>\n\u00a0\u00a0android:useLevel=\"false\">\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u5173\u952e\uff1afalse\u00a0\u624d\u663e\u793a\u5b8c\u6574\u5706\u73af\u00a0--><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#1E88E5\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<size<\/span>\u00a0android:width<\/span>=\"56dp\"<\/span>\u00a0android:height<\/span>=\"56dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \n
    \u26a0\ufe0f \u9ad8\u9891\u5751<\/strong>\uff1aring<\/code> \u9ed8\u8ba4 useLevel=\"true\"<\/code>\uff0c\u6b64\u6a21\u5f0f\u4e0b\u5b83\u4f1a\u628a\u81ea\u5df1\u5f53\u6210 LevelListDrawable<\/code> \u4f7f\u7528\uff0clevel \u4e3a 0 \u65f6\u4ec0\u4e48\u90fd\u4e0d\u663e\u793a<\/strong>\u3002\u53ea\u8981\u4e0d\u662f\u62ff\u5b83\u505a\u8fdb\u5ea6\u6761\uff0c\u5fc5\u987b\u663e\u5f0f\u5199 android:useLevel=\"false\"<\/code><\/strong>\u3002<\/p>\n<\/blockquote>\n
    \n
    3.3 <solid><\/code>\uff1a\u7eaf\u8272\u586b\u5145<\/h3>\n
    \u793a\u4f8b 6\uff1a\u7eaf\u8272\u5706\u89d2\u5757<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/num_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \u53ea\u6709\u4e00\u4e2a\u5c5e\u6027 android:color<\/code>\uff0c\u53ef\u4ee5\u5199 #RGB<\/code> \/ #ARGB<\/code> \/ #RRGGBB<\/code> \/ #AARRGGBB<\/code>\uff0c\u4e5f\u53ef\u4ee5\u5199 @color\/xxx<\/code>\u3002<\/p>\n
    \n
    3.4 <gradient><\/code>\uff1a\u6e10\u53d8<\/h3>\n
    \u793a\u4f8b 7\uff1a\u7ebf\u6027\u6e10\u53d8\uff08linear\uff0c\u9ed8\u8ba4\uff09\u2014\u2014 \u4ece\u84dd\u5230\u9752\uff0c\u4ece\u5de6\u5230\u53f3<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<gradient<\/span>\n\u00a0\u00a0\u00a0\u00a0android:startColor<\/span>=\"#1565C0\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:centerColor<\/span>=\"#1E88E5\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:endColor<\/span>=\"#4DD0E1\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:angle<\/span>=\"0\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:type<\/span>=\"linear\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    android:angle<\/code> \u65b9\u5411\u5bf9\u7167\u8868\uff08\u5fc5\u987b\u7406\u89e3\uff0c\u4e0d\u662f\u968f\u610f\u586b\u7684\uff09\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n\n
    angle<\/th>\n\u6e10\u53d8\u65b9\u5411<\/th>\nangle<\/th>\n\u6e10\u53d8\u65b9\u5411<\/th>\n<\/tr>\n<\/thead>\n
    0<\/strong>\uff08\u9ed8\u8ba4\uff09<\/td>\n\u5de6 \u2192 \u53f3<\/td>\n180<\/td>\n\u53f3 \u2192 \u5de6<\/td>\n<\/tr>\n
    45<\/td>\n\u5de6\u4e0b \u2192 \u53f3\u4e0a<\/td>\n225<\/td>\n\u53f3\u4e0a \u2192 \u5de6\u4e0b<\/td>\n<\/tr>\n
    90<\/strong><\/td>\n\u4e0b \u2192 \u4e0a<\/strong><\/td>\n270<\/strong><\/td>\n\u4e0a \u2192 \u4e0b<\/strong><\/td>\n<\/tr>\n
    135<\/td>\n\u53f3\u4e0b \u2192 \u5de6\u4e0a<\/td>\n315<\/td>\n\u5de6\u4e0a \u2192 \u53f3\u4e0b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u8bb0\u5fc6\u65b9\u6cd5\uff1aangle \u4ece”\u5de6\u2192\u53f3”\u5f00\u59cb\uff0c\u6309\u9006\u65f6\u9488\u65b9\u5411\u9012\u589e<\/strong>\u3002<\/p>\n
    \n
    \u26a0\ufe0f \u7ea0\u9519\u63d0\u793a<\/strong>\uff1a\u5f88\u591a\u7f51\u4f20\u8d44\u6599\u548c\u65e7\u8bfe\u4ef6\u628a angle=90<\/code> \u5199\u6210”\u4ece\u4e0a\u5230\u4e0b”\uff0c\u8fd9\u662f\u9519\u7684<\/strong>\u300290<\/code> \u662f\u4ece\u4e0b\u5230\u4e0a<\/strong>\uff0c\u60f3\u8981”\u4ece\u4e0a\u5230\u4e0b”\u8981\u5199 270<\/code>\u3002\u53e6\u5916 angle<\/code> \u5fc5\u987b\u662f 45 \u7684\u6574\u6570\u500d<\/strong>\uff0c\u5199 30 \u4f1a\u88ab\u5ffd\u7565\uff08\u4e0d\u62a5\u9519\uff0c\u76f4\u63a5\u4e0d\u751f\u6548\uff0c\u6700\u96be\u6392\u67e5\uff09\u3002<\/p>\n<\/blockquote>\n
    \u793a\u4f8b 8\uff1a\u5f84\u5411\u6e10\u53d8\uff08radial\uff09\u2014\u2014 \u4ece\u4e2d\u5fc3\u5411\u5916\u6269\u6563<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<gradient<\/span>\n\u00a0\u00a0\u00a0\u00a0android:startColor<\/span>=\"#FFFFFF\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:endColor<\/span>=\"#000000\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:type<\/span>=\"radial\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:gradientRadius<\/span>=\"80dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:centerX<\/span>=\"0.5\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:centerY<\/span>=\"0.5\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \n
    type=\"radial\"<\/code> \u5fc5\u987b\u914d android:gradientRadius<\/code><\/strong>\uff0c\u5426\u5219\u8fd0\u884c\u65f6\u629b\u5f02\u5e38\u3002centerX<\/code> \/ centerY<\/code> \u53d6\u503c 0.0~1.0<\/code>\uff0c\u662f\u76f8\u5bf9\u6bd4\u4f8b\uff0c0.5<\/code> \u5373\u6b63\u4e2d\u5fc3\u3002<\/p>\n<\/blockquote>\n
    \u793a\u4f8b 9\uff1a\u626b\u63cf\u6e10\u53d8\uff08sweep\uff09\u2014\u2014 \u96f7\u8fbe\u626b\u63cf\u3001\u8272\u73af<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"oval\"<\/span>><\/span>\n\u00a0\u00a0<gradient<\/span>\n\u00a0\u00a0\u00a0\u00a0android:startColor<\/span>=\"#FF5252\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:endColor<\/span>=\"#FFEB3B\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:type<\/span>=\"sweep\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:centerX<\/span>=\"0.5\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:centerY<\/span>=\"0.5\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    <gradient><\/code> \u5c5e\u6027\u901f\u67e5\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n
    \u5c5e\u6027<\/th>\n\u542b\u4e49<\/th>\n\u5907\u6ce8<\/th>\n<\/tr>\n<\/thead>\n
    startColor<\/code> \/ centerColor<\/code> \/ endColor<\/code><\/td>\n\u8d77\u59cb \/ \u4e2d\u95f4 \/ \u7ed3\u675f\u989c\u8272<\/td>\ncenterColor<\/code> \u53ef\u9009<\/td>\n<\/tr>\n
    angle<\/code><\/td>\n\u6e10\u53d8\u89d2\u5ea6<\/td>\n45 \u7684\u6574\u6570\u500d\uff0c\u4ec5 linear \u6709\u6548<\/td>\n<\/tr>\n
    type<\/code><\/td>\nlinear<\/code>(\u9ed8\u8ba4) \/ radial<\/code> \/ sweep<\/code><\/td>\n<\/td>\n<\/tr>\n
    gradientRadius<\/code><\/td>\n\u5f84\u5411\u6e10\u53d8\u534a\u5f84<\/td>\nradial \u5fc5\u586b<\/strong><\/td>\n<\/tr>\n
    centerX<\/code> \/ centerY<\/code><\/td>\n\u6e10\u53d8\u4e2d\u5fc3\u70b9<\/td>\n0.0~1.0\uff0cradial \/ sweep \u7528<\/td>\n<\/tr>\n
    useLevel<\/code><\/td>\n\u662f\u5426\u6309 level \u53d6\u503c<\/td>\n\u5e38\u89c4\u753b\u5f62\u72b6\u8bbe false<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
    3.5 <stroke><\/code>\uff1a\u63cf\u8fb9\u4e0e\u865a\u7ebf<\/h3>\n
    \u793a\u4f8b 10\uff1a\u5b9e\u7ebf\u63cf\u8fb9 \u2014\u2014 \u63cf\u8fb9\u6309\u94ae\uff08Outline Button\uff09<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#00FFFFFF\"<\/span>\u00a0\/><\/span>\u00a0\u00a0\u00a0<!--\u00a0\u5168\u900f\u660e\u586b\u5145\uff0c\u53ea\u7559\u8fb9\u00a0--><\/span>\n\u00a0\u00a0<stroke<\/span>\n\u00a0\u00a0\u00a0\u00a0android:width<\/span>=\"2dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:color<\/span>=\"@color\/fun_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"20dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \u793a\u4f8b 11\uff1a\u865a\u7ebf\u63cf\u8fb9 \u2014\u2014 \u4f18\u60e0\u5238\u865a\u7ebf\u6846<\/strong><\/p>\n
    <\/section>\n
    <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFF8E1\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<stroke<\/span>\n\u00a0\u00a0\u00a0\u00a0android:width<\/span>=\"1dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:color<\/span>=\"#FFA726\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:dashWidth<\/span>=\"6dp\"<\/span>\u00a0\u00a0\u00a0<!--<\/span>\u00a0\u6bcf\u4e00\u5c0f\u6bb5\u5b9e\u7ebf\u7684\u957f\u5ea6<\/span>\u00a0--<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0android:dashGap=\"4dp\"\u00a0\/>\u00a0\u00a0<!--\u00a0\u6bb5\u4e0e\u6bb5\u4e4b\u95f4\u7684\u7a7a\u9699\u00a0--><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"4dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
    \n
    \u26a0\ufe0f \u865a\u7ebf\u4e0d\u663e\u793a\u7684\u4e24\u4e2a\u539f\u56e0<\/strong>\uff1a<\/p>\n
      \n
    1. \n
      android:width<\/code> \u4e3a 0 \u6216\u6ca1\u5199 \u2014\u2014 \u6ca1\u5bbd\u5ea6\u81ea\u7136\u6ca1\u7ebf\u3002<\/section>\n<\/li>\n
    2. \n
      \u786c\u4ef6\u52a0\u901f\u4e0b\u7684\u8001 bug\uff08\u591a\u89c1\u4e8e 4.x \u8bbe\u5907\u67d0\u4e9b\u81ea\u5b9a\u4e49 View\uff09\u2014\u2014 \u7ed9\u8be5 View \u52a0 android:layerType=\"software\"<\/code> \u5373\u53ef\u7ed5\u8fc7\u3002<\/section>\n<\/li>\n<\/ol>\n<\/blockquote>\n
      \n
      3.6 <corners><\/code>\uff1a\u5706\u89d2<\/h3>\n
      \u793a\u4f8b 12\uff1a\u56db\u89d2\u7edf\u4e00\u5706\u89d2<\/strong><\/p>\n
      <\/section>\n
      <corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
      \u793a\u4f8b 13\uff1a\u5355\u72ec\u6307\u5b9a\u56db\u4e2a\u89d2 \u2014\u2014 \u6d88\u606f\u6c14\u6ce1\uff08\u5de6\u4e0b\u89d2\u662f\u5c16\u7684\uff09<\/strong><\/p>\n
      <\/section>\n
      <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#DCF8C6\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\n\u00a0\u00a0\u00a0\u00a0android:topLeftRadius<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:topRightRadius<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottomRightRadius<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottomLeftRadius<\/span>=\"0dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      \u793a\u4f8b 14\uff1a\u80f6\u56ca\u5f62\u6309\u94ae\uff08radius \u2265 \u9ad8\u5ea6\u7684\u4e00\u534a\uff09<\/strong><\/p>\n
      <\/section>\n
      <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/fun_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"999dp\"<\/span>\u00a0\/><\/span>\u00a0\u00a0\u00a0<!--\u00a0\u5199\u5927\u4e00\u70b9\uff0c\u81ea\u52a8\u88ab\u88c1\u6210\u534a\u5706\u00a0--><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <!--\u00a0\u914d\u5957\uff1a\u63a7\u4ef6\u9ad8\u5ea6\u56fa\u5b9a\u00a040dp\uff0cradius\u00a0\u53ea\u8981\u00a0\u2265\u00a020dp\u00a0\u5c31\u662f\u80f6\u56ca\u00a0--><\/span>\n<TextView<\/span>\n\u00a0\u00a0android:layout_width<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:layout_height<\/span>=\"40dp\"<\/span>\n\u00a0\u00a0android:background<\/span>=\"@drawable\/bg_capsule\"<\/span>\n\u00a0\u00a0android:gravity<\/span>=\"center\"<\/span>\n\u00a0\u00a0android:paddingLeft<\/span>=\"20dp\"<\/span>\n\u00a0\u00a0android:paddingRight<\/span>=\"20dp\"<\/span>\n\u00a0\u00a0android:text<\/span>=\"\u7acb\u5373\u9886\u53d6\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
      \n
      \u26a0\ufe0f \u6ce8\u610f<\/strong>\uff1aradius<\/code> \u4e0e\u56db\u4e2a\u5355\u72ec\u5c5e\u6027\u540c\u65f6\u5b58\u5728\u65f6\uff0c\u5355\u72ec\u5c5e\u6027\u4f18\u5148\u7ea7\u66f4\u9ad8<\/strong>\u3002\u53e6\u5916 Android \u6709\u4e2a\u6e32\u67d3\u5c0f bug\uff1a\u5f53 radius<\/code> \u5c0f\u4e8e 1dp \u65f6\u90e8\u5206\u673a\u578b\u4e0d\u751f\u6548\u3002<\/p>\n<\/blockquote>\n
      \n
      3.7 <padding><\/code> \u4e0e <size><\/code><\/h3>\n
      \u793a\u4f8b 15\uff1aShape \u81ea\u5e26\u7684 padding\uff08\u8ba9\u6587\u5b57\u4e0d\u8d34\u8fb9\uff09<\/strong><\/p>\n
      <\/section>\n
      <shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#263238\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<padding<\/span>\n\u00a0\u00a0\u00a0\u00a0android:left<\/span>=\"16dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:top<\/span>=\"12dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"16dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"12dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      \u5bf9\u6bd4\uff1a\u4e24\u79cd padding \u7684\u533a\u522b<\/strong><\/p>\n\n\n\n\n\n\n
      \u5199\u6cd5<\/th>\n\u4f4d\u7f6e<\/th>\n\u5f71\u54cd\u8303\u56f4<\/th>\n\u63a8\u8350\u5ea6<\/th>\n<\/tr>\n<\/thead>\n
      \u63a7\u4ef6\u4e0a\u7684 android:padding<\/code><\/td>\n\u5e03\u5c40 XML \u7684 View \u6807\u7b7e\u91cc<\/td>\n\u53ea\u5f71\u54cd\u5185\u5bb9<\/strong>\uff08\u6587\u5b57\uff09\u4f4d\u7f6e<\/td>\n\u2705 \u63a8\u8350<\/td>\n<\/tr>\n
      Shape \u91cc\u7684 <padding><\/code><\/td>\ndrawable XML \u91cc<\/td>\n\u5f71\u54cd\u5185\u5bb9 + \u80cc\u666f\u7684\u7ed8\u5236\u533a\u57df<\/strong>\uff08\u80cc\u666f\u5411\u5185\u7f29\uff09<\/td>\n\u7279\u5b9a\u573a\u666f\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      <size><\/code><\/strong> \u7ed9 Drawable \u5b9a\u4e49\u56fa\u6709\u5bbd\u9ad8\uff0c\u4e3b\u8981\u914d\u5408 ImageView<\/code> \u7684 scaleType<\/code> \u4f7f\u7528\uff1b\u7ed9 View \u5f53 background \u65f6\u4f1a\u88ab\u63a7\u4ef6\u5b9e\u9645\u5c3a\u5bf8\u8986\u76d6<\/strong>\uff0c\u6240\u4ee5\u4e0d\u8981\u6307\u671b\u7528\u5b83”\u63a7\u5236\u63a7\u4ef6\u5927\u5c0f”\u3002<\/p>\n
      \n
      3.8 Shape \u5c5e\u6027\u901f\u67e5\u8868<\/h3>\n\n\n\n\n\n\n\n\n\n\n
      \u5b50\u8282\u70b9<\/th>\n\u4f5c\u7528<\/th>\n\u5e38\u7528\u5c5e\u6027<\/th>\n\u662f\u5426\u5e38\u7528<\/th>\n<\/tr>\n<\/thead>\n
      <solid><\/code><\/td>\n\u7eaf\u8272\u586b\u5145<\/td>\ncolor<\/code><\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n
      <gradient><\/code><\/td>\n\u6e10\u53d8\u586b\u5145<\/td>\nstartColor<\/code> centerColor<\/code> endColor<\/code> angle<\/code> type<\/code> gradientRadius<\/code> centerX\/Y<\/code><\/td>\n\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n
      <stroke><\/code><\/td>\n\u63cf\u8fb9<\/td>\nwidth<\/code> color<\/code> dashWidth<\/code> dashGap<\/code><\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n
      <corners><\/code><\/td>\n\u5706\u89d2<\/td>\nradius<\/code> topLeftRadius<\/code> topRightRadius<\/code> bottomLeftRadius<\/code> bottomRightRadius<\/code><\/td>\n\u2605\u2605\u2605\u2605\u2605<\/td>\n<\/tr>\n
      <padding><\/code><\/td>\n\u5185\u8fb9\u8ddd<\/td>\nleft<\/code> top<\/code> right<\/code> bottom<\/code><\/td>\n\u2605\u2605<\/td>\n<\/tr>\n
      <size><\/code><\/td>\n\u56fa\u6709\u5c3a\u5bf8<\/td>\nwidth<\/code> height<\/code><\/td>\n\u2605\u2605<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      3.9 Shape \u6613\u9519\u70b9\u6e05\u5355<\/h3>\n\n\n\n\n\n\n\n\n\n\n
      \u73b0\u8c61<\/th>\n\u539f\u56e0<\/th>\n\u89e3\u6cd5<\/th>\n<\/tr>\n<\/thead>\n
      \u5706\u73af\u4e0d\u663e\u793a<\/td>\nring<\/code> \u7684 useLevel<\/code> \u9ed8\u8ba4\u4e3a true<\/td>\n\u663e\u5f0f\u52a0 android:useLevel=\"false\"<\/code><\/td>\n<\/tr>\n
      \u6e10\u53d8\u65b9\u5411\u53cd\u4e86<\/td>\n\u628a angle=90<\/code> \u5f53\u6210”\u4ece\u4e0a\u5230\u4e0b”<\/td>\n90 \u662f\u4e0b\u2192\u4e0a\uff0c270 \u624d\u662f\u4e0a\u2192\u4e0b<\/td>\n<\/tr>\n
      \u89d2\u5ea6\u5199\u4e86\u5374\u6ca1\u53d8\u5316<\/td>\nangle \u4e0d\u662f 45 \u7684\u6574\u6570\u500d<\/td>\n\u6539\u6210 0\/45\/90\/…\/315<\/td>\n<\/tr>\n
      radial \u5d29\u6e83<\/td>\n\u7f3a gradientRadius<\/code><\/td>\n\u8865\u4e0a android:gradientRadius<\/code><\/td>\n<\/tr>\n
      \u865a\u7ebf\u770b\u4e0d\u89c1<\/td>\nstroke<\/code> \u7684 width<\/code> \u4e3a 0<\/td>\n\u81f3\u5c11 1dp\uff0c\u5fc5\u8981\u65f6\u52a0 layerType=\"software\"<\/code><\/td>\n<\/tr>\n
      \u540c\u65f6\u5199 solid \u548c gradient \u53ea\u770b\u5230\u4e00\u4e2a<\/td>\n\u4e8c\u8005\u4e92\u65a5\uff0c\u540e\u5199\u7684\u8986\u76d6\u5148\u5199\u7684<\/td>\n\u4e8c\u9009\u4e00\uff0c\u4e0d\u8981\u540c\u65f6\u5199<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
      \u56db\u3001Selector \u7bc7\uff1a\u8ba9\u63a7\u4ef6”\u6d3b”\u8d77\u6765<\/span><\/h2>\n
      Shape \u53ea\u80fd\u753b”\u6b7b”\u7684\u56fe\u3002\u7528\u6237\u6309\u4e0b\u6309\u94ae\u65f6\u7684\u53d8\u8272\u3001\u8f93\u5165\u6846\u83b7\u5f97\u7126\u70b9\u65f6\u7684\u9ad8\u4eae\uff0c\u5168\u9760 Selector\u3002<\/p>\n
      4.1 \u539f\u7406\u4e0e\u4e24\u6761\u94c1\u5f8b<\/h3>\n
      Selector \u5c31\u662f\u4e00\u5f20**\u300c\u72b6\u6001\u6761\u4ef6 \u2192 drawable\u300d\u7684\u6620\u5c04\u8868**\uff0c\u7cfb\u7edf\u4ece\u4e0a\u5230\u4e0b\u9010\u6761\u5224\u65ad\u3002<\/p>\n
      \u793a\u4f8b 16\uff1a\u274c \u9519\u8bef\u987a\u5e8f vs \u2705 \u6b63\u786e\u987a\u5e8f<\/strong><\/p>\n
      <\/section>\n
      <!--\u00a0\u274c\u00a0\u9519\u8bef\uff1a\u65e0\u6761\u4ef6\u7684\u9ed8\u8ba4\u9879\u5199\u5728\u6700\u524d\u9762\uff0c\u540e\u9762\u7684\u00a0pressed\u00a0\u6c38\u8fdc\u4e0d\u4f1a\u547d\u4e2d\u00a0--><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_pressed\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <!--\u00a0\u2705\u00a0\u6b63\u786e\uff1a\u5177\u4f53\u72b6\u6001\u5728\u524d\uff0c\u9ed8\u8ba4\u9879\u515c\u5e95\u653e\u6700\u540e\u00a0--><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_pressed\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_normal\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      \u4e24\u6761\u94c1\u5f8b\uff1a<\/strong><\/p>\n
      \n
      \u94c1\u5f8b\u4e00<\/strong>\uff1a\u5339\u914d\u662f\u81ea\u4e0a\u800c\u4e0b<\/strong>\u7684\uff0c\u547d\u4e2d\u7b2c\u4e00\u6761”\u6240\u6709\u6761\u4ef6\u90fd\u6ee1\u8db3”\u7684 item \u5c31\u7acb\u5373\u8fd4\u56de\uff0c\u540e\u9762\u7684\u4e0d\u518d\u770b\u3002
      \n\u94c1\u5f8b\u4e8c<\/strong>\uff1a\u4e0d\u5e26\u4efb\u4f55\u72b6\u6001\u6761\u4ef6\u7684 item \u662f\u4e07\u80fd\u515c\u5e95\u9879\uff0c\u5fc5\u987b\u5199\u5728\u6700\u540e\u9762\u3002<\/strong><\/p>\n<\/blockquote>\n
      \n
      4.2 \u72b6\u6001\u5c5e\u6027\u901f\u67e5\u8868<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      \u5c5e\u6027<\/th>\n\u89e6\u53d1\u65f6\u673a<\/th>\n\u5178\u578b\u7528\u9014<\/th>\n<\/tr>\n<\/thead>\n
      state_pressed<\/code><\/td>\n\u624b\u6307\u6309\u4e0b\u672a\u677e\u5f00<\/td>\n\u2605 \u6309\u94ae\u6309\u4e0b\u53d8\u8272<\/td>\n<\/tr>\n
      state_focused<\/code><\/td>\n\u83b7\u5f97\u7126\u70b9\uff08\u952e\u76d8\/\u8f68\u8ff9\u7403\u5bfc\u822a\u3001EditText \u5149\u6807\uff09<\/td>\n\u8f93\u5165\u6846\u9ad8\u4eae\u8fb9\u6846<\/td>\n<\/tr>\n
      state_selected<\/code><\/td>\n\u88ab\u9009\u4e2d\uff08\u9700\u4ee3\u7801 view.setSelected(true)<\/code>\uff09<\/td>\nTab\u3001\u6807\u7b7e\u5207\u6362<\/td>\n<\/tr>\n
      state_checked<\/code><\/td>\n\u52fe\u9009\uff08CheckBox \/ RadioButton \/ ToggleButton\uff09<\/td>\n\u5f00\u5173\u7c7b\u63a7\u4ef6<\/td>\n<\/tr>\n
      state_checkable<\/code><\/td>\n\u53ef\u88ab\u52fe\u9009<\/td>\n\u4e0e checked \u642d\u914d<\/td>\n<\/tr>\n
      state_enabled<\/code><\/td>\n\u662f\u5426\u53ef\u7528\uff08false<\/code> \u5373\u7981\u7528\uff09<\/td>\n\u63d0\u4ea4\u6309\u94ae\u7f6e\u7070<\/td>\n<\/tr>\n
      state_activated<\/code><\/td>\n\u6301\u4e45\u6fc0\u6d3b\u6001\uff08ListView \u5355\u9009\u9700\u8981\uff09<\/td>\n\u5217\u8868\u9879\u9009\u4e2d<\/td>\n<\/tr>\n
      state_window_focused<\/code><\/td>\n\u5f53\u524d\u7a97\u53e3\u662f\u5426\u83b7\u5f97\u7126\u70b9<\/td>\n\u901a\u77e5\u680f\u4e0b\u62c9\/\u9501\u5c4f\u65f6<\/td>\n<\/tr>\n
      state_hovered<\/code><\/td>\n\u9f20\u6807\u60ac\u505c\uff08API 14+\uff09<\/td>\n\u7535\u89c6\/\u5e73\u677f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
      \u63d0\u793a\uff1astate_selected<\/code> \u4e0d\u4f1a\u81ea\u52a8\u89e6\u53d1<\/strong>\uff0c\u5fc5\u987b\u5728 Java \u91cc\u8c03\u7528 view.setSelected(true)<\/code>\uff1b\u800c state_pressed<\/code>\u3001state_focused<\/code>\u3001state_checked<\/code> \u7531\u7cfb\u7edf\u81ea\u52a8\u7ef4\u62a4\u3002<\/p>\n<\/blockquote>\n
      \n
      4.3 \u5199\u6cd5\u4e00\uff1a\u5f15\u7528\u5916\u90e8 drawable\uff08\u63a8\u8350\uff0c\u7ed3\u6784\u6e05\u6670\uff09<\/h3>\n
      \u793a\u4f8b 17\uff1a\u8ba1\u7b97\u5668\u6570\u5b57\u952e\uff08\u793a\u4f8b\u5de5\u7a0b\u540c\u6b3e\uff09<\/strong><\/p>\n
      \u7b2c\u4e00\u6b65\uff0c\u5efa\u4e24\u5f20 shape\uff1a<\/p>\n
      res\/drawable\/bg_key_num_normal.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/num_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      res\/drawable\/bg_key_num_pressed.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/num_pressed\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      \u7b2c\u4e8c\u6b65\uff0c\u7528 selector \u628a\u5b83\u4eec\u4e32\u8d77\u6765\uff1a<\/p>\n
      res\/drawable\/sel_key_num.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u6309\u4e0b\u65f6\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_pressed\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u9ed8\u8ba4\uff08\u5fc5\u987b\u653e\u6700\u540e\uff09\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_normal\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      \u7b2c\u4e09\u6b65\uff0c\u5e03\u5c40\u5f15\u7528\uff1a<\/p>\n
      <\/section>\n
      <Button<\/span>\n\u00a0\u00a0android:id<\/span>=\"@+id\/btn_7\"<\/span>\n\u00a0\u00a0style<\/span>=\"@style\/CalcKey\"<\/span>\n\u00a0\u00a0android:background<\/span>=\"@drawable\/sel_key_num\"<\/span>\n\u00a0\u00a0android:text<\/span>=\"7\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
      \n
      4.4 \u5199\u6cd5\u4e8c\uff1a\u5185\u5d4c shape\uff08\u5c11\u5efa\u6587\u4ef6\uff0c\u63a8\u8350\u65e5\u5e38\u4f7f\u7528\uff09<\/h3>\n
      \u793a\u4f8b 18\uff1a\u4e00\u4e2a\u6587\u4ef6\u641e\u5b9a”\u6309\u4e0b\/\u7981\u7528\/\u9ed8\u8ba4”\u4e09\u79cd\u72b6\u6001<\/strong><\/p>\n
      res\/drawable\/sel_btn_primary.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\n\u00a0\u00a0<!--\u00a0\u2460\u00a0\u7981\u7528\u6001\uff1a\u7f6e\u7070\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_enabled<\/span>=\"false\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#BDBDBD\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"20dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\n\u00a0\u00a0<!--\u00a0\u2461\u00a0\u6309\u4e0b\u6001\uff1a\u6df1\u8272\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#E65100\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"20dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\n\u00a0\u00a0<!--\u00a0\u2462\u00a0\u9ed8\u8ba4\u6001\uff1a\u6e10\u53d8\u00a0+\u00a0\u63cf\u8fb9\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<gradient<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:startColor<\/span>=\"#FFA726\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:endColor<\/span>=\"#EF6C00\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:angle<\/span>=\"270\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"20dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      \n
      \u5173\u952e\uff1a<item><\/code> \u91cc\u53ef\u4ee5\u76f4\u63a5\u5199 <shape><\/code> \u4f5c\u4e3a\u5b50\u5143\u7d20<\/strong>\uff0c\u7701\u6389\u4e00\u5806\u5355\u72ec\u6587\u4ef6\u3002\u9879\u76ee\u91cc\u6309\u94ae\u6837\u5f0f\u591a\u65f6\uff0c\u8fd9\u79cd\u5199\u6cd5\u80fd\u8ba9 drawable \u76ee\u5f55\u6e05\u723d\u4e00\u534a\u3002<\/p>\n<\/blockquote>\n
      \n
      4.5 \u989c\u8272\u9009\u62e9\u5668\uff1a\u7ed9\u6587\u5b57\u505a\u72b6\u6001\u5207\u6362<\/h3>\n
      \u793a\u4f8b 19\uff1a\u6309\u4e0b\u65f6\u6587\u5b57\u4e5f\u8ddf\u7740\u53d8\u8272<\/strong><\/p>\n
      \u80cc\u666f\u80fd\u5207\uff0c\u6587\u5b57\u5f53\u7136\u4e5f\u80fd\u3002\u533a\u522b\u662f\uff1a\u989c\u8272\u9009\u62e9\u5668\u8981\u653e\u5728 res\/color\/<\/code> \u76ee\u5f55\u4e0b<\/strong>\uff0c\u7528 android:textColor<\/code> \u5f15\u7528\u3002<\/p>\n
      res\/color\/sel_text_tab.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_selected<\/span>=\"true\"<\/span>\u00a0android:color<\/span>=\"#EF6C00\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\u00a0android:color<\/span>=\"#FFA726\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:color<\/span>=\"#757575\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <TextView<\/span>\n\u00a0\u00a0android:layout_width<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:layout_height<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:textColor<\/span>=\"@color\/sel_text_tab\"<\/span>\n\u00a0\u00a0android:text<\/span>=\"\u9996\u9875\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
      \n
      \u26a0\ufe0f \u6ce8\u610f\u7ec6\u8282\uff1a\u989c\u8272 selector \u7528\u7684\u662f android:color<\/code><\/strong> \u5c5e\u6027\uff0c\u4e0d\u662f android:drawable<\/code>\u3002\u653e\u9519\u76ee\u5f55\uff08res\/drawable\/<\/code>\uff09\u4f1a\u5bfc\u81f4 textColor<\/code> \u5f15\u7528\u62a5\u9519\u6216\u5931\u6548\u3002<\/p>\n<\/blockquote>\n
      \n
      4.6 \u8f93\u5165\u6846\u7126\u70b9\u9ad8\u4eae<\/h3>\n
      \u793a\u4f8b 20\uff1aEditText \u83b7\u5f97\u7126\u70b9\u65f6\u8fb9\u6846\u53d8\u6210\u4e3b\u9898\u8272<\/strong><\/p>\n
      res\/drawable\/sel_edittext_border.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\n\u00a0\u00a0<item<\/span>\u00a0android:state_focused<\/span>=\"true\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<stroke<\/span>\u00a0android:width<\/span>=\"2dp\"<\/span>\u00a0android:color<\/span>=\"#1E88E5\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"4dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<padding<\/span>\u00a0android:left<\/span>=\"10dp\"<\/span>\u00a0android:top<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"10dp\"<\/span>\u00a0android:bottom<\/span>=\"10dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<stroke<\/span>\u00a0android:width<\/span>=\"1dp\"<\/span>\u00a0android:color<\/span>=\"#BDBDBD\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"4dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<padding<\/span>\u00a0android:left<\/span>=\"10dp\"<\/span>\u00a0android:top<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"10dp\"<\/span>\u00a0android:bottom<\/span>=\"10dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <EditText<\/span>\n\u00a0\u00a0android:layout_width<\/span>=\"match_parent\"<\/span>\n\u00a0\u00a0android:layout_height<\/span>=\"wrap_content\"<\/span>\n\u00a0\u00a0android:background<\/span>=\"@drawable\/sel_edittext_border\"<\/span>\n\u00a0\u00a0android:hint<\/span>=\"\u8bf7\u8f93\u5165\u624b\u673a\u53f7\"<\/span>\u00a0\/><\/span>\n<\/code><\/pre>\n
      \n
      4.7 \u5217\u8868\u9009\u4e2d\u6001<\/h3>\n
      \u793a\u4f8b 21\uff1aListView \u9879\u88ab\u9009\u4e2d\u65f6\u9ad8\u4eae<\/strong><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u6309\u4e0b\uff08\u624b\u6307\u8fd8\u6309\u7740\uff09\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#BBDEFB\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u9009\u4e2d\u5e76\u6301\u4e45\u4fdd\u6301\uff08ListView\u00a0\u8bbe\u4e86\u00a0choiceMode\u00a0\u65f6\uff09\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_activated<\/span>=\"true\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#E3F2FD\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u9ed8\u8ba4\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      \n
      \u63d0\u793a\uff1aListView \u7684\u6301\u4e45\u9009\u4e2d<\/strong>\u8981\u7528 state_activated<\/code> \u914d\u5408 listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE)<\/code>\uff1b\u53ea\u5199 state_selected<\/code> \u5728\u89e6\u6478\u6a21\u5f0f\u4e0b\u4e0d\u4f1a\u4fdd\u6301\u3002<\/p>\n<\/blockquote>\n
      \n
      4.8 \u7981\u7528\u6001<\/h3>\n
      \u793a\u4f8b 22\uff1a\u6309\u94ae\u4e0d\u53ef\u7528\u65f6\u7f6e\u7070<\/strong><\/p>\n
      <\/section>\n
      <selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_enabled<\/span>=\"false\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#E0E0E0\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<stroke<\/span>\u00a0android:width<\/span>=\"1dp\"<\/span>\u00a0android:color<\/span>=\"#BDBDBD\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#E65100\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#EF6C00\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      \/\/\u00a0Java\u00a0\u4e2d\u5207\u6362\u53ef\u7528\u6027<\/span>\nbtnSubmit.setEnabled(false<\/span>);\u00a0\u00a0\u00a0\/\/\u00a0\u81ea\u52a8\u547d\u4e2d\u00a0state_enabled=\"false\"<\/span>\n<\/code><\/pre>\n
      \n
      4.9 Selector \u6613\u9519\u70b9\u6e05\u5355<\/h3>\n\n\n\n\n\n\n\n\n\n\n
      \u73b0\u8c61<\/th>\n\u539f\u56e0<\/th>\n\u89e3\u6cd5<\/th>\n<\/tr>\n<\/thead>\n
      \u6309\u4e0b\u6ca1\u53cd\u5e94<\/td>\n\u9ed8\u8ba4\u9879\u5199\u5728\u4e86\u6700\u524d\u9762<\/td>\n\u9ed8\u8ba4\u9879\u79fb\u5230\u6700\u540e<\/td>\n<\/tr>\n
      \u6587\u5b57\u989c\u8272\u4e0d\u53d8<\/td>\nselector \u653e\u5728 res\/drawable\/<\/code><\/td>\n\u79fb\u5230 res\/color\/<\/code>\uff0c\u5c5e\u6027\u6539 android:color<\/code><\/td>\n<\/tr>\n
      state_selected<\/code> \u6b7b\u6d3b\u4e0d\u751f\u6548<\/td>\n\u7cfb\u7edf\u4e0d\u4f1a\u81ea\u52a8\u7f6e\u4f4d<\/td>\nJava \u8c03 view.setSelected(true)<\/code><\/td>\n<\/tr>\n
      ListView \u9009\u4e2d\u4e00\u677e\u624b\u5c31\u6ca1\u4e86<\/td>\n\u7528\u4e86 state_selected<\/code><\/td>\n\u6362 state_activated<\/code> + setChoiceMode()<\/code><\/td>\n<\/tr>\n
      \u7981\u7528\u540e\u70b9\u51fb\u8fd8\u6709\u53cd\u9988<\/td>\nsetEnabled(false)<\/code> \u6ca1\u8c03\u7528<\/td>\n\u6216 selector \u91cc\u6f0f\u4e86 state_enabled=\"false\"<\/code> \u9879<\/td>\n<\/tr>\n
      \u5199\u4e86 state_pressed<\/code> \u4f46 Button \u65e0\u53d8\u5316<\/td>\n\u4e3b\u9898\u7ed9 Button \u52a0\u4e86\u9ed8\u8ba4 backgroundTint<\/code> \u8986\u76d6<\/td>\n\u7528 AppCompatButton<\/code> \u65f6\u8bbe app:backgroundTint=\"@null\"<\/code>\uff08\u672c\u8bfe\u793a\u4f8b\u5de5\u7a0b\u4e0d\u4f9d\u8d56 AppCompat\uff0c\u65e0\u6b64\u95ee\u9898\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
      \u4e94\u3001layer-list \u7bc7\uff1a\u53e0\u52a0\u51fa\u590d\u6742\u6548\u679c<\/span><\/h2>\n
      5.1 \u57fa\u672c\u7ed3\u6784<\/h3>\n
      \u793a\u4f8b 23\uff1a\u4e24\u5f20\u56fe\u53e0\u52a0<\/strong><\/p>\n
      res\/drawable\/bg_layer_demo.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<layer-list<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u4e0b\u5c42\uff1a\u80cc\u666f\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/faceback\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<!--\u00a0\u4e0a\u5c42\uff1a\u5934\u50cf\uff0c\u5411\u5185\u504f\u79fb\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\n\u00a0\u00a0\u00a0\u00a0android:drawable<\/span>=\"@drawable\/h001\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:left<\/span>=\"10dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:top<\/span>=\"18dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"25dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"35dp\"<\/span>\u00a0\/><\/span>\n<\/layer-list<\/span>><\/span>\n<\/code><\/pre>\n
      \u89c4\u5219<\/strong>\uff1a<item><\/code> \u6309\u4e66\u5199\u987a\u5e8f\u4ece\u4e0b\u5f80\u4e0a\u53e0<\/strong>\uff0c\u5199\u5728\u540e\u9762\u7684\u5728\u6700\u4e0a\u5c42\uff1bleft\/top\/right\/bottom<\/code> \u8868\u793a\u8be5\u5c42\u76f8\u5bf9\u5bb9\u5668\u7684\u5185\u7f29\u504f\u79fb<\/strong>\u3002<\/p>\n
      \n
      5.2 \u53ea\u8981\u4e00\u6761\u5e95\u8fb9\u7ebf<\/h3>\n
      \u793a\u4f8b 24\uff1a\u53ea\u6709\u5e95\u90e8\u6709\u5206\u9694\u7ebf\u7684\u8f93\u5165\u6846\uff08\u7ecf\u5178\u6280\u5de7\uff09<\/strong><\/p>\n
      res\/drawable\/bg_bottom_line.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<layer-list<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u4e0b\u5c42\uff1a\u6574\u5757\u80cc\u666f\u8272\u5c31\u662f\"\u7ebf\"\u7684\u989c\u8272\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#1E88E5\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u4e0a\u5c42\uff1a\u767d\u8272\u5757\uff0c\u5e95\u90e8\u7559\u00a01dp\u00a0\u4e0d\u906e\uff0c\u9732\u51fa\u4e0b\u9762\u90a3\u6761\u7ebf\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:bottom<\/span>=\"1dp\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n<\/layer-list<\/span>><\/span>\n<\/code><\/pre>\n
      \n
      \u63d0\u793a\uff1a\u8fd9\u662f”\u906e\u7f69\u6cd5<\/strong>“\u2014\u2014\u5148\u94fa\u6ee1\u7ebf\u8272\uff0c\u518d\u7528\u4e3b\u8272\u5757\u7559\u51fa 1dp \u7684\u7f1d\u3002\u60f3\u8981\u9876\u8fb9\u7ebf\u5c31\u628a android:bottom<\/code> \u6362\u6210 android:top<\/code>\u3002<\/p>\n<\/blockquote>\n
      \n
      5.3 \u7b80\u6613\u9634\u5f71<\/h3>\n
      \u793a\u4f8b 25\uff1a\u7528\u4e24\u5c42\u504f\u79fb\u77e9\u5f62\u6a21\u62df\u6295\u5f71<\/strong><\/p>\n
      res\/drawable\/bg_card_shadow.xml<\/code><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<layer-list<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u9634\u5f71\u5c42\uff1a\u7070\u8272\uff0c\u5411\u4e0b\u504f\u79fb\u00a02dp\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\n\u00a0\u00a0\u00a0\u00a0android:left<\/span>=\"2dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:top<\/span>=\"2dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"0dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"0dp\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#33000000\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u5361\u7247\u5c42\uff1a\u767d\u8272\uff0c\u76d6\u5728\u4e0a\u9762\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"2dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"2dp\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n<\/layer-list<\/span>><\/span>\n<\/code><\/pre>\n
      \n
      Android 5.0+ \u6709 android:elevation<\/code> \u53ef\u4ee5\u51fa\u771f\u5b9e\u9634\u5f71\uff0c\u4f46 4.x \u8bbe\u5907\u4e0a\u53ea\u80fd\u9760\u8fd9\u79cd”\u5047\u9634\u5f71”\u515c\u5e95\uff0cminSdk 14 \u7684\u5de5\u7a0b\u5fc5\u987b\u4f1a\u8fd9\u4e00\u62db\u3002<\/p>\n<\/blockquote>\n
      \n
      5.4 \u53cc\u5c42\u63cf\u8fb9<\/h3>\n
      \u793a\u4f8b 26\uff1a\u5916\u767d\u5185\u84dd\u7684\u53cc\u8272\u8fb9\u6846\uff08\u5934\u50cf\u6846\u5e38\u89c1\u6548\u679c\uff09<\/strong><\/p>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<layer-list<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u5916\u5c42\uff1a\u767d\u8272\u63cf\u8fb9\u00a04dp\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"oval\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#FFFFFF\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<size<\/span>\u00a0android:width<\/span>=\"72dp\"<\/span>\u00a0android:height<\/span>=\"72dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n\u00a0\u00a0<!--\u00a0\u5185\u5c42\uff1a\u84dd\u8272\u63cf\u8fb9\uff0c\u5411\u5185\u7f29\u00a04dp\u00a0\u9732\u51fa\u767d\u8fb9\u00a0--><\/span>\n\u00a0\u00a0<item<\/span>\n\u00a0\u00a0\u00a0\u00a0android:left<\/span>=\"4dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:top<\/span>=\"4dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:right<\/span>=\"4dp\"<\/span>\n\u00a0\u00a0\u00a0\u00a0android:bottom<\/span>=\"4dp\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0<shape<\/span>\u00a0android:shape<\/span>=\"oval\"<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"#1E88E5\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<stroke<\/span>\u00a0android:width<\/span>=\"2dp\"<\/span>\u00a0android:color<\/span>=\"#0D47A1\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0\u00a0\u00a0<\/shape<\/span>><\/span>\n\u00a0\u00a0<\/item<\/span>><\/span>\n<\/layer-list<\/span>><\/span>\n<\/code><\/pre>\n
      \n
      \u516d\u3001\u7efc\u5408\u5b9e\u6218\uff1a\u7ed9\u8ba1\u7b97\u5668\u6362\u4e00\u5957\u76ae\u80a4<\/span><\/h2>\n
      \u628a\u524d\u9762\u6240\u6709\u77e5\u8bc6\u70b9\u4e32\u8d77\u6765\uff0c\u5b8c\u6210\u8ba1\u7b97\u5668\u754c\u9762\u3002<\/p>\n
      Step 1\uff1a\u5148\u5b9a\u989c\u8272\uff08res\/values\/colors.xml<\/code>\uff09<\/h3>\n
      <\/section>\n
      <?xml\u00a0version=\"1.0\"<\/span>\u00a0encoding=\"utf-8\"<\/span>?><\/span>\n<resources<\/span>><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"display_bg\"<\/span>><\/span>#263238<\/color<\/span>><\/span>\u00a0\u00a0<!--\u00a0\u663e\u793a\u5c4f\u5e95\u00a0--><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"display_text\"<\/span>><\/span>#FFFFFF<\/color<\/span>><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"num_normal\"<\/span>><\/span>#455A64<\/color<\/span>><\/span>\u00a0\u00a0<!--\u00a0\u6570\u5b57\u952e\u00a0\u9ed8\u8ba4\u00a0--><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"num_pressed\"<\/span>><\/span>#607D8B<\/color<\/span>><\/span>\u00a0\u00a0\u00a0<!--\u00a0\u6570\u5b57\u952e\u00a0\u6309\u4e0b\u00a0--><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"fun_normal\"<\/span>><\/span>#EF6C00<\/color<\/span>><\/span>\u00a0\u00a0<!--\u00a0\u8fd0\u7b97\u952e\u00a0\u9ed8\u8ba4\u00a0--><\/span>\n\u00a0\u00a0<color<\/span>\u00a0name<\/span>=\"fun_pressed\"<\/span>><\/span>#FFA726<\/color<\/span>><\/span>\u00a0\u00a0\u00a0<!--\u00a0\u8fd0\u7b97\u952e\u00a0\u6309\u4e0b\u00a0--><\/span>\n<\/resources<\/span>><\/span>\n<\/code><\/pre>\n
      Step 2\uff1a\u753b 5 \u5f20 Shape<\/h3>\n
      <\/section>\n
      <!--\u00a0bg_display.xml\uff1a\u663e\u793a\u5c4f\uff0c\u6df1\u5e95\u5706\u89d2\u00a0--><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/display_bg\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <!--\u00a0bg_key_num_normal.xml\u00a0\/\u00a0bg_key_num_pressed.xml\uff1a\u6570\u5b57\u952e\u00a0--><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/num_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <!--\u00a0bg_key_fun_normal.xml\u00a0\/\u00a0bg_key_fun_pressed.xml\uff1a\u8fd0\u7b97\u952e\u00a0--><\/span>\n<shape<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n\u00a0\u00a0android:shape<\/span>=\"rectangle\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0android:color<\/span>=\"@color\/fun_normal\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"6dp\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
      Step 3\uff1a\u7528 2 \u4e2a Selector \u4e32\u72b6\u6001<\/h3>\n
      <\/section>\n
      <!--\u00a0sel_key_num.xml\u00a0--><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_pressed\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_num_normal\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      <\/section>\n
      <!--\u00a0sel_key_fun.xml\u00a0--><\/span>\n<selector<\/span>\u00a0xmlns:android<\/span>=\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_fun_pressed\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/bg_key_fun_normal\"<\/span>\u00a0\/><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
      Step 4\uff1a\u5e03\u5c40\u5f15\u7528 + style \u590d\u7528<\/h3>\n
      res\/values\/styles.xml<\/code><\/p>\n
      <\/section>\n
      <style<\/span>\u00a0name<\/span>=\"CalcKey\"<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:layout_width\"<\/span>><\/span>0dp<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:layout_height\"<\/span>><\/span>match_parent<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:layout_weight\"<\/span>><\/span>1<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:layout_margin\"<\/span>><\/span>4dp<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:textSize\"<\/span>><\/span>24sp<\/item<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0name<\/span>=\"android:textColor\"<\/span>><\/span>#FFFFFF<\/item<\/span>><\/span>\n<\/span><\/style<\/span>><\/span>\n<\/code><\/pre>\n
      res\/layout\/activity_calculator.xml<\/code>\uff08\u7247\u6bb5\uff09<\/p>\n
      <\/section>\n
      <TextView<\/span>\n\u00a0\u00a0android:id<\/span>=\"@+id\/tv_display\"<\/span>\n\u00a0\u00a0android:layout_width<\/span>=\"match_parent\"<\/span>\n\u00a0\u00a0android:layout_height<\/span>=\"0dp\"<\/span>\n\u00a0\u00a0android:layout_weight<\/span>=\"1\"<\/span>\n\u00a0\u00a0android:background<\/span>=\"@drawable\/bg_display\"<\/span>\n\u00a0\u00a0android:gravity<\/span>=\"end|center_vertical\"<\/span>\n\u00a0\u00a0android:padding<\/span>=\"16dp\"<\/span>\n\u00a0\u00a0android:text<\/span>=\"0\"<\/span>\n\u00a0\u00a0android:textColor<\/span>=\"@color\/display_text\"<\/span>\n\u00a0\u00a0android:textSize<\/span>=\"36sp\"<\/span>\u00a0\/><\/span>\n<!--\u00a0\u6309\u952e\u533a\u7701\u7565\uff0c\u6bcf\u4e2a\u00a0Button\u00a0\u7528\u00a0style=\"@style\/CalcKey\"\n\u00a0\u00a0\u00a0+\u00a0android:background=\"@drawable\/sel_key_num\"\uff08\u6216\u00a0sel_key_fun\uff09\u00a0--><\/span>\n<\/code><\/pre>\n
      \u793a\u4f8b\u5de5\u7a0b\u6587\u4ef6\u5bf9\u5e94\u5173\u7cfb\uff1a<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
      \u8bfe\u4ef6\u77e5\u8bc6\u70b9<\/th>\n\u793a\u4f8b\u5de5\u7a0b\u4e2d\u7684\u6587\u4ef6<\/th>\n<\/tr>\n<\/thead>\n
      solid + corners<\/td>\nres\/drawable\/bg_display.xml<\/code>\u3001bg_key_num_normal.xml<\/code><\/td>\n<\/tr>\n
      \u72b6\u6001\u5207\u6362<\/td>\nres\/drawable\/sel_key_num.xml<\/code>\u3001sel_key_fun.xml<\/code><\/td>\n<\/tr>\n
      \u5e03\u5c40\u5f15\u7528<\/td>\nres\/layout\/activity_calculator.xml<\/code><\/td>\n<\/tr>\n
      \u6837\u5f0f\u590d\u7528<\/td>\nres\/values\/styles.xml<\/code> \u7684 CalcKey<\/code><\/td>\n<\/tr>\n
      \u989c\u8272\u96c6\u4e2d\u7ba1\u7406<\/td>\nres\/values\/colors.xml<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
      \u4e03\u3001\u8c03\u8bd5\u4e0e\u6392\u67e5\u6e05\u5355<\/span><\/h2>\n\n\n\n\n\n\n\n\n\n\n
      \u73b0\u8c61<\/th>\n\u53ef\u80fd\u539f\u56e0<\/th>\n\u6392\u67e5\u52a8\u4f5c<\/th>\n<\/tr>\n<\/thead>\n
      \u80cc\u666f\u5b8c\u5168\u6ca1\u53d8\u5316<\/td>\ndrawable \u6587\u4ef6\u540d\u5199\u9519 \/ \u6ca1\u540c\u6b65<\/td>\n\u770b XML \u662f\u5426\u62a5\u7ea2\uff1bBuild \u2192 Clean Project<\/td>\n<\/tr>\n
      \u9884\u89c8\u6b63\u5e38\uff0c\u771f\u673a\u4e0a\u4e0d\u5bf9<\/td>\n\u7528\u4e86\u9ad8\u4e8e minSdk \u7684\u5c5e\u6027<\/td>\n\u964d\u4f4e targetSdk \u6216\u505a\u7248\u672c\u517c\u5bb9<\/td>\n<\/tr>\n
      \u5706\u89d2\u88ab\u5185\u5bb9”\u5207\u6389”<\/td>\n\u5185\u5bb9\u8d85\u51fa\u80cc\u666f\u8303\u56f4<\/td>\n\u68c0\u67e5 View \u7684 padding<\/code> \u4e0e\u80cc\u666f <padding><\/code><\/td>\n<\/tr>\n
      \u53ea\u5728\u90e8\u5206\u673a\u578b\u5f02\u5e38<\/td>\n\u5382\u5546 ROM \u5bf9\u4e3b\u9898\u505a\u4e86\u8986\u76d6<\/td>\n\u663e\u5f0f\u8bbe android:background<\/code>\uff0c\u4e0d\u4f9d\u8d56\u4e3b\u9898\u9ed8\u8ba4\u503c<\/td>\n<\/tr>\n
      \u6539\u4e86 XML \u6ca1\u751f\u6548<\/td>\n\u7f16\u8bd1\u7f13\u5b58<\/td>\nBuild \u2192 Clean \u2192 Rebuild\uff0c\u5378\u8f7d\u91cd\u88c5<\/td>\n<\/tr>\n
      \u6e10\u53d8\u65b9\u5411\u4e0d\u5bf9<\/td>\nangle \u7406\u89e3\u53cd\u4e86<\/td>\n\u5bf9\u7167 3.4 \u7684\u89d2\u5ea6\u8868<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \u5feb\u901f\u9a8c\u8bc1\u6280\u5de7<\/strong>\uff1aAndroid Studio \u7684\u5e03\u5c40\u7f16\u8f91\u5668\u53ef\u4ee5\u76f4\u63a5\u6e32\u67d3 drawable \u9884\u89c8<\/strong>\uff08\u6253\u5f00 XML \u6587\u4ef6\uff0c\u53f3\u4fa7 Preview \u9762\u677f\uff09\uff0c\u6539\u4e00\u884c\u770b\u4e00\u773c\uff0c\u6bd4\u8dd1\u6a21\u62df\u5668\u5feb\u5341\u500d\u3002<\/p>\n
      \n
      \u516b\u3001\u7ec3\u4e60\uff085 \u9898\uff09<\/span><\/h2>\n
        \n
      1. \n
        \u80f6\u56ca\u6309\u94ae<\/strong>\uff1a\u7528 Shape \u5199\u4e00\u4e2a\u9ad8 44dp\u3001\u5706\u89d2\u4e3a\u534a\u5706\u3001\u6a59\u8272\u5e95\u3001\u767d\u8272\u6587\u5b57\u7684”\u7acb\u5373\u767b\u5f55”\u6309\u94ae\u3002<\/section>\n<\/li>\n
      2. \n
        \u865a\u7ebf\u4f18\u60e0\u5238\u6846<\/strong>\uff1a\u6d45\u9ec4\u586b\u5145 + \u6a59\u8272 1dp \u865a\u7ebf\u8fb9\u6846 + 4dp \u5706\u89d2\u3002<\/section>\n<\/li>\n
      3. \n
        \u4e09\u6001\u6309\u94ae<\/strong>\uff1a\u4e00\u4e2a XML \u6587\u4ef6\u5b9e\u73b0”\u7981\u7528\u7070 \/ \u6309\u4e0b\u6df1\u84dd \/ \u9ed8\u8ba4\u6e10\u53d8\u84dd”\u4e09\u79cd\u72b6\u6001\u3002<\/section>\n<\/li>\n
      4. \n
        \u53ea\u6709\u5e95\u8fb9\u7ebf\u7684\u8f93\u5165\u6846<\/strong>\uff1a\u7528 layer-list \u5b9e\u73b0\uff0c\u805a\u7126\u65f6\u7ebf\u53d8\u7c97\u53d8\u4e3b\u9898\u8272\uff08\u63d0\u793a\uff1alayer-list \u4e0d\u80fd\u76f4\u63a5\u653e selector\uff0c\u9700\u8981\u518d\u5305\u4e00\u5c42\uff09\u3002<\/section>\n<\/li>\n
      5. \n
        \u5706\u5f62\u5934\u50cf\u6846<\/strong>\uff1a\u5916\u5708\u767d\u8272 4dp\u3001\u5185\u5708\u84dd\u8272\u63cf\u8fb9\u7684\u53cc\u5c42\u5706\u5f62\u8fb9\u6846\uff08\u7528 layer-list + oval\uff09\u3002<\/section>\n<\/li>\n<\/ol>\n
        \n
        \u4e5d\u3001\u4e00\u9875\u7eb8\u901f\u67e5\u8868<\/span><\/h2>\n
        Shape<\/strong><\/p>\n
        <\/section>\n
        <shape<\/span>\u00a0android:shape<\/span>=\"rectangle|oval|line|ring\"<\/span>><\/span>\n\u00a0\u00a0<solid<\/span>\u00a0\u00a0\u00a0android:color<\/span>=\"#RRGGBB\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<gradient<\/span>\u00a0android:startColor<\/span>=\"#\"<\/span>\u00a0android:centerColor<\/span>=\"#\"<\/span>\u00a0android:endColor<\/span>=\"#\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:angle<\/span>=\"0|45|...|315\"<\/span>\u00a0android:type<\/span>=\"linear|radial|sweep\"<\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:gradientRadius<\/span>=\"80dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<stroke<\/span>\u00a0\u00a0android:width<\/span>=\"1dp\"<\/span>\u00a0android:color<\/span>=\"#\"<\/span>\u00a0\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:dashWidth<\/span>=\"6dp\"<\/span>\u00a0android:dashGap<\/span>=\"4dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<corners<\/span>\u00a0android:radius<\/span>=\"8dp\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<padding<\/span>\u00a0android:left<\/span>=\"\"<\/span>\u00a0android:top<\/span>=\"\"<\/span>\u00a0android:right<\/span>=\"\"<\/span>\u00a0android:bottom<\/span>=\"\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<size<\/span>\u00a0\u00a0android:width<\/span>=\"\"<\/span>\u00a0android:height<\/span>=\"\"<\/span>\u00a0\/><\/span>\n<\/shape<\/span>><\/span>\n<\/code><\/pre>\n
        Selector<\/strong><\/p>\n
        <\/section>\n
        <selector<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_pressed<\/span>=\"true\"<\/span>\u00a0\u00a0android:drawable<\/span>=\"@drawable\/xxx\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:state_enabled<\/span>=\"false\"<\/span>\u00a0android:drawable<\/span>=\"@drawable\/xxx\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/xxx\"<\/span>\u00a0\/><\/span>\u00a0\u00a0\u00a0<!--\u00a0\u9ed8\u8ba4\u9879\uff0c\u6c38\u8fdc\u653e\u6700\u540e\u00a0--><\/span>\n<\/selector<\/span>><\/span>\n<\/code><\/pre>\n
        layer-list<\/strong><\/p>\n
        <\/section>\n
        <layer-list<\/span>><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/\u4e0b\u5c42\"<\/span>\u00a0\/><\/span>\n\u00a0\u00a0<item<\/span>\u00a0android:drawable<\/span>=\"@drawable\/\u4e0a\u5c42\"<\/span>\u00a0\u00a0\u00a0<!--<\/span>\u00a0\u540e\u5199\u7684\u5728\u4e0a<\/span>\u00a0--<\/span>><\/span>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0android:left=\"\"\u00a0android:top=\"\"\u00a0android:right=\"\"\u00a0android:bottom=\"\"\u00a0\/>\n<\/layer-list<\/span>><\/span>\n<\/code><\/pre>\n
        \n
        \u9644\uff1a\u77e5\u8bc6\u70b9 \u2194 \u793a\u4f8b\u7d22\u5f15<\/span><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
        \u5e8f\u53f7<\/th>\n\u77e5\u8bc6\u70b9<\/th>\n\u793a\u4f8b<\/th>\n<\/tr>\n<\/thead>\n
        1<\/td>\nShape \u9aa8\u67b6<\/td>\n\u793a\u4f8b 1<\/td>\n<\/tr>\n
        2<\/td>\nrectangle<\/td>\n\u793a\u4f8b 2<\/td>\n<\/tr>\n
        3<\/td>\noval<\/td>\n\u793a\u4f8b 3<\/td>\n<\/tr>\n
        4<\/td>\nline<\/td>\n\u793a\u4f8b 4<\/td>\n<\/tr>\n
        5<\/td>\nring + useLevel<\/td>\n\u793a\u4f8b 5<\/td>\n<\/tr>\n
        6<\/td>\nsolid \u586b\u5145<\/td>\n\u793a\u4f8b 6<\/td>\n<\/tr>\n
        7<\/td>\ngradient \u7ebf\u6027\u6e10\u53d8 + angle<\/td>\n\u793a\u4f8b 7<\/td>\n<\/tr>\n
        8<\/td>\ngradient \u5f84\u5411\u6e10\u53d8<\/td>\n\u793a\u4f8b 8<\/td>\n<\/tr>\n
        9<\/td>\ngradient \u626b\u63cf\u6e10\u53d8<\/td>\n\u793a\u4f8b 9<\/td>\n<\/tr>\n
        10<\/td>\nstroke \u5b9e\u7ebf\u63cf\u8fb9<\/td>\n\u793a\u4f8b 10<\/td>\n<\/tr>\n
        11<\/td>\nstroke \u865a\u7ebf\u63cf\u8fb9<\/td>\n\u793a\u4f8b 11<\/td>\n<\/tr>\n
        12<\/td>\ncorners \u7edf\u4e00\u5706\u89d2<\/td>\n\u793a\u4f8b 12<\/td>\n<\/tr>\n
        13<\/td>\ncorners \u5206\u89d2\u8bbe\u7f6e<\/td>\n\u793a\u4f8b 13<\/td>\n<\/tr>\n
        14<\/td>\ncorners \u80f6\u56ca\u5f62<\/td>\n\u793a\u4f8b 14<\/td>\n<\/tr>\n
        15<\/td>\npadding \/ size<\/td>\n\u793a\u4f8b 15<\/td>\n<\/tr>\n
        16<\/td>\nSelector \u5339\u914d\u987a\u5e8f<\/td>\n\u793a\u4f8b 16<\/td>\n<\/tr>\n
        17<\/td>\nSelector \u5f15\u7528 drawable<\/td>\n\u793a\u4f8b 17<\/td>\n<\/tr>\n
        18<\/td>\nSelector \u5185\u5d4c shape<\/td>\n\u793a\u4f8b 18<\/td>\n<\/tr>\n
        19<\/td>\n\u989c\u8272 selector\uff08res\/color\uff09<\/td>\n\u793a\u4f8b 19<\/td>\n<\/tr>\n
        20<\/td>\nstate_focused \u8f93\u5165\u6846<\/td>\n\u793a\u4f8b 20<\/td>\n<\/tr>\n
        21<\/td>\nstate_activated \u5217\u8868\u9009\u4e2d<\/td>\n\u793a\u4f8b 21<\/td>\n<\/tr>\n
        22<\/td>\nstate_enabled \u7981\u7528\u6001<\/td>\n\u793a\u4f8b 22<\/td>\n<\/tr>\n
        23<\/td>\nlayer-list \u53e0\u52a0<\/td>\n\u793a\u4f8b 23<\/td>\n<\/tr>\n
        24<\/td>\nlayer-list \u5355\u8fb9\u7ebf<\/td>\n\u793a\u4f8b 24<\/td>\n<\/tr>\n
        25<\/td>\nlayer-list \u9634\u5f71<\/td>\n\u793a\u4f8b 25<\/td>\n<\/tr>\n
        26<\/td>\nlayer-list \u53cc\u5c42\u8fb9\u6846<\/td>\n\u793a\u4f8b 26<\/td>\n<\/tr>\n
        27<\/td>\n\u7efc\u5408\uff1a\u8ba1\u7b97\u5668\u76ae\u80a4<\/td>\n\u7b2c\u516d\u8282<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
        \u9002\u7528\u73af\u5883\uff1aAndroid Studio + Java\uff08\u65e0 Kotlin\u3001\u65e0 AndroidX \u4f9d\u8d56\uff09\uff0cminS […]<\/p>\n","protected":false},"author":1,"featured_media":3955,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,2],"tags":[213],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/3954"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3954"}],"version-history":[{"count":1,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/3954\/revisions"}],"predecessor-version":[{"id":3956,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/3954\/revisions\/3956"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/media\/3955"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}