{"id":1206,"date":"2016-02-06T21:19:48","date_gmt":"2016-02-06T13:19:48","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=1206"},"modified":"2026-08-15T17:02:15","modified_gmt":"2026-08-15T09:02:15","slug":"android-%e9%ab%98%e6%b8%85%e5%8a%a0%e8%bd%bd%e5%b7%a8%e5%9b%be%e6%96%b9%e6%a1%88-%e6%8b%92%e7%bb%9d%e5%8e%8b%e7%bc%a9%e5%9b%be%e7%89%87","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=1206","title":{"rendered":"Android \u9ad8\u6e05\u52a0\u8f7d\u5de8\u56fe\u65b9\u6848 \u62d2\u7edd\u538b\u7f29\u56fe\u7247"},"content":{"rendered":"<h2><a href=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png\" rel=\"fancybox\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-3498\" src=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png\" alt=\"\" width=\"2151\" height=\"1105\" srcset=\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image.png 2151w, https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image-768x395.png 768w, https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image-1536x789.png 1536w, https:\/\/ai.zhousir.top\/wp-content\/uploads\/2024\/05\/image-2048x1052.png 2048w\" sizes=\"(max-width: 2151px) 100vw, 2151px\" \/><\/a><\/h2>\n<h2 id=\"\u4e00\u6982\u8ff0\">\u4e00\u3001\u6982\u8ff0<\/h2>\n<p>\u8ddd\u79bb\u4e0a\u4e00\u7bc7\u535a\u5ba2\u6709\u6bb5\u65f6\u95f4\u6ca1\u66f4\u65b0\u4e86\uff0c\u4e3b\u8981\u662f\u6700\u8fd1\u6709\u4e9b\u79c1\u4e8b\u5bfc\u81f4\u7684\uff0c\u90a3\u4e48\u5c31\u5148\u6765\u4e00\u7bc7\u7b80\u5355\u4e00\u70b9\u7684\u535a\u5ba2\u8109\u52a8\u56de\u6765\u3002<\/p>\n<p>\u5bf9\u4e8e\u52a0\u8f7d\u56fe\u7247\uff0c\u5927\u5bb6\u90fd\u4e0d\u964c\u751f\uff0c\u4e00\u822c\u4e3a\u4e86\u5c3d\u53ef\u80fd\u907f\u514dOOM\u90fd\u4f1a\u6309\u7167\u5982\u4e0b\u505a\u6cd5\uff1a<!--more--><\/p>\n<ol>\n<li>\u5bf9\u4e8e\u56fe\u7247\u663e\u793a\uff1a\u6839\u636e\u9700\u8981\u663e\u793a\u56fe\u7247\u63a7\u4ef6\u7684\u5927\u5c0f\u5bf9\u56fe\u7247\u8fdb\u884c\u538b\u7f29\u663e\u793a\u3002<\/li>\n<li>\u5982\u679c\u56fe\u7247\u6570\u91cf\u975e\u5e38\u591a\uff1a\u5219\u4f1a\u4f7f\u7528LruCache\u7b49\u7f13\u5b58\u673a\u5236\uff0c\u5c06\u6240\u6709\u56fe\u7247\u5360\u636e\u7684\u5185\u5bb9\u7ef4\u6301\u5728\u4e00\u4e2a\u8303\u56f4\u5185\u3002<\/li>\n<\/ol>\n<p>\u5176\u5b9e\u5bf9\u4e8e\u56fe\u7247\u52a0\u8f7d\u8fd8\u6709\u79cd\u60c5\u51b5\uff0c\u5c31\u662f\u5355\u4e2a\u56fe\u7247\u975e\u5e38\u5de8\u5927\uff0c\u5e76\u4e14\u8fd8\u4e0d\u5141\u8bb8\u538b\u7f29\u3002\u6bd4\u5982\u663e\u793a\uff1a\u4e16\u754c\u5730\u56fe\u3001\u6e05\u660e\u4e0a\u6cb3\u56fe\u3001\u5fae\u535a\u957f\u56fe\u7b49\u3002<\/p>\n<p>\u90a3\u4e48\u5bf9\u4e8e\u8fd9\u79cd\u9700\u6c42\uff0c\u8be5\u5982\u4f55\u505a\u5462\uff1f<\/p>\n<p>\u9996\u5148\u4e0d\u538b\u7f29\uff0c\u6309\u7167\u539f\u56fe\u5c3a\u5bf8\u52a0\u8f7d\uff0c\u90a3\u4e48\u5c4f\u5e55\u80af\u5b9a\u662f\u4e0d\u591f\u5927\u7684\uff0c\u5e76\u4e14\u8003\u8651\u5230\u5185\u5b58\u7684\u60c5\u51b5\uff0c\u4e0d\u53ef\u80fd\u4e00\u6b21\u6027\u6574\u56fe\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u6240\u4ee5\u80af\u5b9a\u662f\u5c40\u90e8\u52a0\u8f7d\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u7528\u5230\u4e00\u4e2a\u7c7b\uff1a<\/p>\n<ul>\n<li><code>BitmapRegionDecoder<\/code><\/li>\n<\/ul>\n<p>\u5176\u6b21\uff0c\u65e2\u7136\u5c4f\u5e55\u663e\u793a\u4e0d\u5b8c\uff0c\u90a3\u4e48\u6700\u8d77\u7801\u8981\u6dfb\u52a0\u4e00\u4e2a\u4e0a\u4e0b\u5de6\u53f3\u62d6\u52a8\u7684\u624b\u52bf\uff0c\u8ba9\u7528\u6237\u53ef\u4ee5\u62d6\u52a8\u67e5\u770b\u3002<\/p>\n<p>\u90a3\u4e48\u7efc\u4e0a\uff0c\u672c\u7bc7\u535a\u6587\u7684\u76ee\u7684\u5c31\u662f\u53bb\u81ea\u5b9a\u4e49\u4e00\u4e2a\u663e\u793a\u5de8\u56fe\u7684View\uff0c\u652f\u6301\u7528\u6237\u53bb\u62d6\u52a8\u67e5\u770b\uff0c\u5927\u6982\u7684\u6548\u679c\u56fe\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.blog.csdn.net\/20151021103013582\" alt=\"\" width=\"320px\" \/><\/p>\n<p>\u597d\u5427\uff0c\u8fd9\u6e05\u660e\u4e0a\u6cb3\u56fe\u592a\u957f\u4e86\uff0c\u60f3\u8981\u89c2\u770b\u5168\u56fe\uff0c\u6587\u672b\u4e0b\u8f7d\uff0c\u56fe\u7247\u5728assets\u76ee\u5f55\u3002\u5f53\u7136\u5982\u679c\u4f60\u7684\u56fe\uff0c\u9ad8\u5ea6\u4e5f\u5f88\u5927\uff0c\u80af\u5b9a\u4e5f\u662f\u53ef\u4ee5\u4e0a\u4e0b\u62d6\u52a8\u7684\u3002<\/p>\n<h2 id=\"\u4e8c\u521d\u8bc6bitmapregiondecoder\"><a name=\"t2\"><\/a>\u4e8c\u3001\u521d\u8bc6BitmapRegionDecoder<\/h2>\n<p><code>BitmapRegionDecoder<\/code>\u4e3b\u8981\u7528\u4e8e\u663e\u793a\u56fe\u7247\u7684\u67d0\u4e00\u5757\u77e9\u5f62\u533a\u57df\uff0c\u5982\u679c\u4f60\u9700\u8981\u663e\u793a\u67d0\u4e2a\u56fe\u7247\u7684\u6307\u5b9a\u533a\u57df\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7c7b\u975e\u5e38\u5408\u9002\u3002<\/p>\n<p>\u5bf9\u4e8e\u8be5\u7c7b\u7684\u7528\u6cd5\uff0c\u975e\u5e38\u7b80\u5355\uff0c\u65e2\u7136\u662f\u663e\u793a\u56fe\u7247\u7684\u67d0\u4e00\u5757\u533a\u57df\uff0c\u90a3\u4e48\u81f3\u5c11\u53ea\u9700\u8981\u4e00\u4e2a\u65b9\u6cd5\u53bb\u8bbe\u7f6e\u56fe\u7247\uff1b\u4e00\u4e2a\u65b9\u6cd5\u4f20\u5165\u663e\u793a\u7684\u533a\u57df\u5373\u53ef\uff1b\u8be6\u89c1\uff1a<\/p>\n<ul>\n<li>BitmapRegionDecoder\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684newInstance\u65b9\u6cd5\u6765\u6784\u9020\u5bf9\u8c61\uff0c\u652f\u6301\u4f20\u5165\u6587\u4ef6\u8def\u5f84\uff0c\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u6587\u4ef6\u7684inputstrem\u7b49\u3002\u4f8b\u5982\uff1a\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\"> BitmapRegionDecoder bitmapRegionDecoder =\n  BitmapRegionDecoder.newInstance(inputStream, <span class=\"hljs-keyword\">false<\/span>);<\/code><\/pre>\n<\/li>\n<li>\u4e0a\u8ff0\u89e3\u51b3\u4e86\u4f20\u5165\u6211\u4eec\u9700\u8981\u5904\u7406\u7684\u56fe\u7247\uff0c\u90a3\u4e48\u63a5\u4e0b\u6765\u5c31\u662f\u663e\u793a\u6307\u5b9a\u7684\u533a\u57df\u3002\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\">bitmapRegionDecoder.decodeRegion(rect, options);<\/code><\/pre>\n<p>\u53c2\u6570\u4e00\u5f88\u660e\u663e\u662f\u4e00\u4e2arect\uff0c\u53c2\u6570\u4e8c\u662fBitmapFactory.Options\uff0c\u4f60\u53ef\u4ee5\u63a7\u5236\u56fe\u7247\u7684<code>inSampleSize<\/code>,<code>inPreferredConfig<\/code>\u7b49\u3002<\/li>\n<\/ul>\n<p>\u90a3\u4e48\u4e0b\u9762\u770b\u4e00\u4e2a\u8d85\u7ea7\u7b80\u5355\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\"><span class=\"hljs-keyword\">package<\/span> com.zhy.blogcodes.largeImage;\n\n<span class=\"hljs-keyword\">import<\/span> android.graphics.Bitmap;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.BitmapFactory;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.BitmapRegionDecoder;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.Rect;\n<span class=\"hljs-keyword\">import<\/span> android.os.Bundle;\n<span class=\"hljs-keyword\">import<\/span> android.support.v7.app.AppCompatActivity;\n<span class=\"hljs-keyword\">import<\/span> android.widget.ImageView;\n\n<span class=\"hljs-keyword\">import<\/span> com.zhy.blogcodes.R;\n\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\n<span class=\"hljs-keyword\">import<\/span> java.io.InputStream;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">LargeImageViewActivity<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">AppCompatActivity<\/span>\n{<\/span>\n    <span class=\"hljs-keyword\">private<\/span> ImageView mImageView;\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onCreate<\/span>(Bundle savedInstanceState)\n    {\n        <span class=\"hljs-keyword\">super<\/span>.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_large_image_view);\n\n        mImageView = (ImageView) findViewById(R.id.id_imageview);\n        <span class=\"hljs-keyword\">try<\/span>\n        {\n            InputStream inputStream = getAssets().open(<span class=\"hljs-string\">\"tangyan.jpg\"<\/span>);\n\n            <span class=\"hljs-comment\">\/\/\u83b7\u5f97\u56fe\u7247\u7684\u5bbd\u3001\u9ad8<\/span>\n            BitmapFactory.Options tmpOptions = <span class=\"hljs-keyword\">new<\/span> BitmapFactory.Options();\n            tmpOptions.inJustDecodeBounds = <span class=\"hljs-keyword\">true<\/span>;\n            BitmapFactory.decodeStream(inputStream, <span class=\"hljs-keyword\">null<\/span>, tmpOptions);\n            <span class=\"hljs-keyword\">int<\/span> width = tmpOptions.outWidth;\n            <span class=\"hljs-keyword\">int<\/span> height = tmpOptions.outHeight;\n\n            <span class=\"hljs-comment\">\/\/\u8bbe\u7f6e\u663e\u793a\u56fe\u7247\u7684\u4e2d\u5fc3\u533a\u57df<\/span>\n            BitmapRegionDecoder bitmapRegionDecoder = BitmapRegionDecoder.newInstance(inputStream, <span class=\"hljs-keyword\">false<\/span>);\n            BitmapFactory.Options options = <span class=\"hljs-keyword\">new<\/span> BitmapFactory.Options();\n            options.inPreferredConfig = Bitmap.Config.RGB_565;\n            Bitmap bitmap = bitmapRegionDecoder.decodeRegion(<span class=\"hljs-keyword\">new<\/span> Rect(width \/ <span class=\"hljs-number\">2<\/span> - <span class=\"hljs-number\">100<\/span>, height \/ <span class=\"hljs-number\">2<\/span> - <span class=\"hljs-number\">100<\/span>, width \/ <span class=\"hljs-number\">2<\/span> + <span class=\"hljs-number\">100<\/span>, height \/ <span class=\"hljs-number\">2<\/span> + <span class=\"hljs-number\">100<\/span>), options);\n            mImageView.setImageBitmap(bitmap);\n\n\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e)\n        {\n            e.printStackTrace();\n        }\n\n\n    }\n\n}<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u7801\uff0c\u5c31\u662f\u4f7f\u7528BitmapRegionDecoder\u53bb\u52a0\u8f7dassets\u4e2d\u7684\u56fe\u7247\uff0c\u8c03\u7528<code>bitmapRegionDecoder.decodeRegion<\/code>\u89e3\u6790\u56fe\u7247\u7684\u4e2d\u95f4\u77e9\u5f62\u533a\u57df\uff0c\u8fd4\u56debitmap\uff0c\u6700\u7ec8\u663e\u793a\u5728ImageView\u4e0a\u3002<\/p>\n<p>\u6548\u679c\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.blog.csdn.net\/20151021103048017\" alt=\"\" width=\"320px\" \/><\/p>\n<p>\u4e0a\u9762\u7684\u5c0f\u56fe\u663e\u793a\u7684\u5373\u4e3a\u4e0b\u9762\u7684\u5927\u56fe\u7684\u4e2d\u95f4\u533a\u57df\u3002<\/p>\n<p>ok\uff0c\u90a3\u4e48\u76ee\u524d\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86<code>BitmapRegionDecoder<\/code>\u7684\u57fa\u672c\u7528\u6237\uff0c\u90a3\u4e48\u5f80\u5916\u6269\u6563\uff0c\u6211\u4eec\u9700\u8981\u81ea\u5b9a\u4e49\u4e00\u4e2a\u63a7\u4ef6\u53bb\u663e\u793a\u5de8\u56fe\u5c31\u5f88\u7b80\u5355\u4e86\uff0c\u9996\u5148Rect\u7684\u8303\u56f4\u5c31\u662f\u6211\u4eecView\u7684\u5927\u5c0f\uff0c\u7136\u540e\u6839\u636e\u7528\u6237\u7684\u79fb\u52a8\u624b\u52bf\uff0c\u4e0d\u65ad\u53bb\u66f4\u65b0\u6211\u4eec\u7684Rect\u7684\u53c2\u6570\u5373\u53ef\u3002<\/p>\n<h2 id=\"\u4e09\u81ea\u5b9a\u4e49\u663e\u793a\u5927\u56fe\u63a7\u4ef6\"><a name=\"t3\"><\/a>\u4e09\u3001\u81ea\u5b9a\u4e49\u663e\u793a\u5927\u56fe\u63a7\u4ef6<\/h2>\n<p>\u6839\u636e\u4e0a\u9762\u7684\u5206\u6790\u5462\uff0c\u6211\u4eec\u8fd9\u4e2a\u81ea\u5b9a\u4e49\u63a7\u4ef6\u601d\u8def\u5c31\u975e\u5e38\u6e05\u6670\u4e86\uff1a<\/p>\n<ul>\n<li>\u63d0\u4f9b\u4e00\u4e2a\u8bbe\u7f6e\u56fe\u7247\u7684\u5165\u53e3<\/li>\n<li>\u91cd\u5199onTouchEvent\uff0c\u5728\u91cc\u9762\u6839\u636e\u7528\u6237\u79fb\u52a8\u7684\u624b\u52bf\uff0c\u53bb\u66f4\u65b0\u663e\u793a\u533a\u57df\u7684\u53c2\u6570<\/li>\n<li>\u6bcf\u6b21\u66f4\u65b0\u533a\u57df\u53c2\u6570\u540e\uff0c\u8c03\u7528invalidate\uff0conDraw\u91cc\u9762\u53bbregionDecoder.decodeRegion\u62ff\u5230bitmap\uff0c\u53bbdraw<\/li>\n<\/ul>\n<p>\u7406\u6e05\u4e86\uff0c\u53d1\u73b0so easy\uff0c\u4e0b\u9762\u4e0a\u4ee3\u7801\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\"><span class=\"hljs-keyword\">package<\/span> com.zhy.blogcodes.largeImage.view;\n\n<span class=\"hljs-keyword\">import<\/span> android.content.Context;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.Bitmap;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.BitmapFactory;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.BitmapRegionDecoder;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.Canvas;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.Rect;\n<span class=\"hljs-keyword\">import<\/span> android.util.AttributeSet;\n<span class=\"hljs-keyword\">import<\/span> android.view.MotionEvent;\n<span class=\"hljs-keyword\">import<\/span> android.view.View;\n\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\n<span class=\"hljs-keyword\">import<\/span> java.io.InputStream;\n\n<span class=\"hljs-javadoc\">\/**\n * Created by zhy on 15\/5\/16.\n *\/<\/span>\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">LargeImageView<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">View<\/span>\n{<\/span>\n    <span class=\"hljs-keyword\">private<\/span> BitmapRegionDecoder mDecoder;\n    <span class=\"hljs-javadoc\">\/**\n     * \u56fe\u7247\u7684\u5bbd\u5ea6\u548c\u9ad8\u5ea6\n     *\/<\/span>\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">int<\/span> mImageWidth, mImageHeight;\n    <span class=\"hljs-javadoc\">\/**\n     * \u7ed8\u5236\u7684\u533a\u57df\n     *\/<\/span>\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">volatile<\/span> Rect mRect = <span class=\"hljs-keyword\">new<\/span> Rect();\n\n    <span class=\"hljs-keyword\">private<\/span> MoveGestureDetector mDetector;\n\n\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> BitmapFactory.Options options = <span class=\"hljs-keyword\">new<\/span> BitmapFactory.Options();\n\n    <span class=\"hljs-keyword\">static<\/span>\n    {\n        options.inPreferredConfig = Bitmap.Config.RGB_565;\n    }\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">setInputStream<\/span>(InputStream is)\n    {\n        <span class=\"hljs-keyword\">try<\/span>\n        {\n            mDecoder = BitmapRegionDecoder.newInstance(is, <span class=\"hljs-keyword\">false<\/span>);\n            BitmapFactory.Options tmpOptions = <span class=\"hljs-keyword\">new<\/span> BitmapFactory.Options();\n            <span class=\"hljs-comment\">\/\/ Grab the bounds for the scene dimensions<\/span>\n            tmpOptions.inJustDecodeBounds = <span class=\"hljs-keyword\">true<\/span>;\n            BitmapFactory.decodeStream(is, <span class=\"hljs-keyword\">null<\/span>, tmpOptions);\n            mImageWidth = tmpOptions.outWidth;\n            mImageHeight = tmpOptions.outHeight;\n\n            requestLayout();\n            invalidate();\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e)\n        {\n            e.printStackTrace();\n        } <span class=\"hljs-keyword\">finally<\/span>\n        {\n\n            <span class=\"hljs-keyword\">try<\/span>\n            {\n                <span class=\"hljs-keyword\">if<\/span> (is != <span class=\"hljs-keyword\">null<\/span>) is.close();\n            } <span class=\"hljs-keyword\">catch<\/span> (Exception e)\n            {\n            }\n        }\n    }\n\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">init<\/span>()\n    {\n        mDetector = <span class=\"hljs-keyword\">new<\/span> MoveGestureDetector(getContext(), <span class=\"hljs-keyword\">new<\/span> MoveGestureDetector.SimpleMoveGestureDetector()\n        {\n            <span class=\"hljs-annotation\">@Override<\/span>\n            <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onMove<\/span>(MoveGestureDetector detector)\n            {\n                <span class=\"hljs-keyword\">int<\/span> moveX = (<span class=\"hljs-keyword\">int<\/span>) detector.getMoveX();\n                <span class=\"hljs-keyword\">int<\/span> moveY = (<span class=\"hljs-keyword\">int<\/span>) detector.getMoveY();\n\n                <span class=\"hljs-keyword\">if<\/span> (mImageWidth &gt; getWidth())\n                {\n                    mRect.offset(-moveX, <span class=\"hljs-number\">0<\/span>);\n                    checkWidth();\n                    invalidate();\n                }\n                <span class=\"hljs-keyword\">if<\/span> (mImageHeight &gt; getHeight())\n                {\n                    mRect.offset(<span class=\"hljs-number\">0<\/span>, -moveY);\n                    checkHeight();\n                    invalidate();\n                }\n\n                <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">true<\/span>;\n            }\n        });\n    }\n\n\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">checkWidth<\/span>()\n    {\n\n\n        Rect rect = mRect;\n        <span class=\"hljs-keyword\">int<\/span> imageWidth = mImageWidth;\n        <span class=\"hljs-keyword\">int<\/span> imageHeight = mImageHeight;\n\n        <span class=\"hljs-keyword\">if<\/span> (rect.right &gt; imageWidth)\n        {\n            rect.right = imageWidth;\n            rect.left = imageWidth - getWidth();\n        }\n\n        <span class=\"hljs-keyword\">if<\/span> (rect.left &lt; <span class=\"hljs-number\">0<\/span>)\n        {\n            rect.left = <span class=\"hljs-number\">0<\/span>;\n            rect.right = getWidth();\n        }\n    }\n\n\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">checkHeight<\/span>()\n    {\n\n        Rect rect = mRect;\n        <span class=\"hljs-keyword\">int<\/span> imageWidth = mImageWidth;\n        <span class=\"hljs-keyword\">int<\/span> imageHeight = mImageHeight;\n\n        <span class=\"hljs-keyword\">if<\/span> (rect.bottom &gt; imageHeight)\n        {\n            rect.bottom = imageHeight;\n            rect.top = imageHeight - getHeight();\n        }\n\n        <span class=\"hljs-keyword\">if<\/span> (rect.top &lt; <span class=\"hljs-number\">0<\/span>)\n        {\n            rect.top = <span class=\"hljs-number\">0<\/span>;\n            rect.bottom = getHeight();\n        }\n    }\n\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title\">LargeImageView<\/span>(Context context, AttributeSet attrs)\n    {\n        <span class=\"hljs-keyword\">super<\/span>(context, attrs);\n        init();\n    }\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onTouchEvent<\/span>(MotionEvent event)\n    {\n        mDetector.onToucEvent(event);\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">true<\/span>;\n    }\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onDraw<\/span>(Canvas canvas)\n    {\n        Bitmap bm = mDecoder.decodeRegion(mRect, options);\n        canvas.drawBitmap(bm, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-number\">0<\/span>, <span class=\"hljs-keyword\">null<\/span>);\n    }\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onMeasure<\/span>(<span class=\"hljs-keyword\">int<\/span> widthMeasureSpec, <span class=\"hljs-keyword\">int<\/span> heightMeasureSpec)\n    {\n        <span class=\"hljs-keyword\">super<\/span>.onMeasure(widthMeasureSpec, heightMeasureSpec);\n\n        <span class=\"hljs-keyword\">int<\/span> width = getMeasuredWidth();\n        <span class=\"hljs-keyword\">int<\/span> height = getMeasuredHeight();\n\n        <span class=\"hljs-keyword\">int<\/span> imageWidth = mImageWidth;\n        <span class=\"hljs-keyword\">int<\/span> imageHeight = mImageHeight;\n\n         <span class=\"hljs-comment\">\/\/\u9ed8\u8ba4\u76f4\u63a5\u663e\u793a\u56fe\u7247\u7684\u4e2d\u5fc3\u533a\u57df\uff0c\u53ef\u4ee5\u81ea\u5df1\u53bb\u8c03\u8282<\/span>\n        mRect.left = imageWidth \/ <span class=\"hljs-number\">2<\/span> - width \/ <span class=\"hljs-number\">2<\/span>;\n        mRect.top = imageHeight \/ <span class=\"hljs-number\">2<\/span> - height \/ <span class=\"hljs-number\">2<\/span>;\n        mRect.right = mRect.left + width;\n        mRect.bottom = mRect.top + height;\n\n    }\n\n<\/code><\/pre>\n<p>\u6839\u636e\u4e0a\u8ff0\u6e90\u7801:<\/p>\n<ol>\n<li>setInputStream\u91cc\u9762\u53bb\u83b7\u5f97\u56fe\u7247\u7684\u771f\u5b9e\u7684\u5bbd\u5ea6\u548c\u9ad8\u5ea6\uff0c\u4ee5\u53ca\u521d\u59cb\u5316\u6211\u4eec\u7684mDecoder<\/li>\n<li>onMeasure\u91cc\u9762\u4e3a\u6211\u4eec\u7684\u663e\u793a\u533a\u57df\u7684rect\u8d4b\u503c\uff0c\u5927\u5c0f\u4e3aview\u7684\u5c3a\u5bf8<\/li>\n<li>onTouchEvent\u91cc\u9762\u6211\u4eec\u76d1\u542cmove\u7684\u624b\u52bf\uff0c\u5728\u76d1\u542c\u7684\u56de\u8c03\u91cc\u9762\u53bb\u6539\u53d8rect\u7684\u53c2\u6570\uff0c\u4ee5\u53ca\u505a\u8fb9\u754c\u68c0\u67e5\uff0c\u6700\u540einvalidate<\/li>\n<li>\u5728onDraw\u91cc\u9762\u5c31\u662f\u6839\u636erect\u62ff\u5230bitmap\uff0c\u7136\u540edraw\u4e86<\/li>\n<\/ol>\n<p>ok\uff0c\u4e0a\u9762\u5e76\u4e0d\u590d\u6742\uff0c\u4e0d\u8fc7\u5927\u5bb6\u6709\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u8fd9\u4e2a\u76d1\u542c\u7528\u6237move\u624b\u52bf\u7684\u4ee3\u7801\u5199\u7684\u6709\u70b9\u5947\u602a\uff0c\u6069\uff0c\u8fd9\u91cc\u6a21\u4eff\u4e86\u7cfb\u7edf\u7684<code>ScaleGestureDetector<\/code>\uff0c\u7f16\u5199\u4e86<code>MoveGestureDetector<\/code>\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>MoveGestureDetector\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\">\n<span class=\"hljs-keyword\">package<\/span> com.zhy.blogcodes.largeImage.view;\n\n<span class=\"hljs-keyword\">import<\/span> android.content.Context;\n<span class=\"hljs-keyword\">import<\/span> android.graphics.PointF;\n<span class=\"hljs-keyword\">import<\/span> android.view.MotionEvent;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">MoveGestureDetector<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">BaseGestureDetector<\/span>\n{<\/span>\n\n    <span class=\"hljs-keyword\">private<\/span> PointF mCurrentPointer;\n    <span class=\"hljs-keyword\">private<\/span> PointF mPrePointer;\n    <span class=\"hljs-comment\">\/\/\u4ec5\u4ec5\u4e3a\u4e86\u51cf\u5c11\u521b\u5efa\u5185\u5b58<\/span>\n    <span class=\"hljs-keyword\">private<\/span> PointF mDeltaPointer = <span class=\"hljs-keyword\">new<\/span> PointF();\n\n    <span class=\"hljs-comment\">\/\/\u7528\u4e8e\u8bb0\u5f55\u6700\u7ec8\u7ed3\u679c\uff0c\u5e76\u8fd4\u56de<\/span>\n    <span class=\"hljs-keyword\">private<\/span> PointF mExtenalPointer = <span class=\"hljs-keyword\">new<\/span> PointF();\n\n    <span class=\"hljs-keyword\">private<\/span> OnMoveGestureListener mListenter;\n\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title\">MoveGestureDetector<\/span>(Context context, OnMoveGestureListener listener)\n    {\n        <span class=\"hljs-keyword\">super<\/span>(context);\n        mListenter = listener;\n    }\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">handleInProgressEvent<\/span>(MotionEvent event)\n    {\n        <span class=\"hljs-keyword\">int<\/span> actionCode = event.getAction() &amp; MotionEvent.ACTION_MASK;\n        <span class=\"hljs-keyword\">switch<\/span> (actionCode)\n        {\n            <span class=\"hljs-keyword\">case<\/span> MotionEvent.ACTION_CANCEL:\n            <span class=\"hljs-keyword\">case<\/span> MotionEvent.ACTION_UP:\n                mListenter.onMoveEnd(<span class=\"hljs-keyword\">this<\/span>);\n                resetState();\n                <span class=\"hljs-keyword\">break<\/span>;\n            <span class=\"hljs-keyword\">case<\/span> MotionEvent.ACTION_MOVE:\n                updateStateByEvent(event);\n                <span class=\"hljs-keyword\">boolean<\/span> update = mListenter.onMove(<span class=\"hljs-keyword\">this<\/span>);\n                <span class=\"hljs-keyword\">if<\/span> (update)\n                {\n                    mPreMotionEvent.recycle();\n                    mPreMotionEvent = MotionEvent.obtain(event);\n                }\n                <span class=\"hljs-keyword\">break<\/span>;\n\n        }\n    }\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">handleStartProgressEvent<\/span>(MotionEvent event)\n    {\n        <span class=\"hljs-keyword\">int<\/span> actionCode = event.getAction() &amp; MotionEvent.ACTION_MASK;\n        <span class=\"hljs-keyword\">switch<\/span> (actionCode)\n        {\n            <span class=\"hljs-keyword\">case<\/span> MotionEvent.ACTION_DOWN:\n                resetState();<span class=\"hljs-comment\">\/\/\u9632\u6b62\u6ca1\u6709\u63a5\u6536\u5230CANCEL or UP ,\u4fdd\u9669\u8d77\u89c1<\/span>\n                mPreMotionEvent = MotionEvent.obtain(event);\n                updateStateByEvent(event);\n                <span class=\"hljs-keyword\">break<\/span>;\n            <span class=\"hljs-keyword\">case<\/span> MotionEvent.ACTION_MOVE:\n                mGestureInProgress = mListenter.onMoveBegin(<span class=\"hljs-keyword\">this<\/span>);\n                <span class=\"hljs-keyword\">break<\/span>;\n        }\n\n    }\n\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">updateStateByEvent<\/span>(MotionEvent event)\n    {\n        <span class=\"hljs-keyword\">final<\/span> MotionEvent prev = mPreMotionEvent;\n\n        mPrePointer = caculateFocalPointer(prev);\n        mCurrentPointer = caculateFocalPointer(event);\n\n        <span class=\"hljs-comment\">\/\/Log.e(\"TAG\", mPrePointer.toString() + \" ,  \" + mCurrentPointer);<\/span>\n\n        <span class=\"hljs-keyword\">boolean<\/span> mSkipThisMoveEvent = prev.getPointerCount() != event.getPointerCount();\n\n        <span class=\"hljs-comment\">\/\/Log.e(\"TAG\", \"mSkipThisMoveEvent = \" + mSkipThisMoveEvent);<\/span>\n        mExtenalPointer.x = mSkipThisMoveEvent ? <span class=\"hljs-number\">0<\/span> : mCurrentPointer.x - mPrePointer.x;\n        mExtenalPointer.y = mSkipThisMoveEvent ? <span class=\"hljs-number\">0<\/span> : mCurrentPointer.y - mPrePointer.y;\n\n    }\n\n    <span class=\"hljs-javadoc\">\/**\n     * \u6839\u636eevent\u8ba1\u7b97\u591a\u6307\u4e2d\u5fc3\u70b9\n     *\n     *<span class=\"hljs-javadoctag\"> @param<\/span> event\n     *<span class=\"hljs-javadoctag\"> @return<\/span>\n     *\/<\/span>\n    <span class=\"hljs-keyword\">private<\/span> PointF <span class=\"hljs-title\">caculateFocalPointer<\/span>(MotionEvent event)\n    {\n        <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-keyword\">int<\/span> count = event.getPointerCount();\n        <span class=\"hljs-keyword\">float<\/span> x = <span class=\"hljs-number\">0<\/span>, y = <span class=\"hljs-number\">0<\/span>;\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">int<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; count; i++)\n        {\n            x += event.getX(i);\n            y += event.getY(i);\n        }\n\n        x \/= count;\n        y \/= count;\n\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">new<\/span> PointF(x, y);\n    }\n\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">float<\/span> <span class=\"hljs-title\">getMoveX<\/span>()\n    {\n        <span class=\"hljs-keyword\">return<\/span> mExtenalPointer.x;\n\n    }\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">float<\/span> <span class=\"hljs-title\">getMoveY<\/span>()\n    {\n        <span class=\"hljs-keyword\">return<\/span> mExtenalPointer.y;\n    }\n\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">OnMoveGestureListener<\/span>\n    {<\/span>\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onMoveBegin<\/span>(MoveGestureDetector detector);\n\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onMove<\/span>(MoveGestureDetector detector);\n\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onMoveEnd<\/span>(MoveGestureDetector detector);\n    }\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">SimpleMoveGestureDetector<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title\">OnMoveGestureListener<\/span>\n    {<\/span>\n\n        <span class=\"hljs-annotation\">@Override<\/span>\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onMoveBegin<\/span>(MoveGestureDetector detector)\n        {\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">true<\/span>;\n        }\n\n        <span class=\"hljs-annotation\">@Override<\/span>\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">boolean<\/span> <span class=\"hljs-title\">onMove<\/span>(MoveGestureDetector detector)\n        {\n            <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">false<\/span>;\n        }\n\n        <span class=\"hljs-annotation\">@Override<\/span>\n        <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onMoveEnd<\/span>(MoveGestureDetector detector)\n        {\n        }\n    }\n\n}<\/code><\/pre>\n<\/li>\n<li>BaseGestureDetector\n<pre class=\"prettyprint\"><code class=\"hljs cs has-numbering\">package com.zhy.blogcodes.largeImage.view;\n\nimport android.content.Context;\nimport android.view.MotionEvent;\n\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">abstract<\/span> <span class=\"hljs-keyword\">class<\/span> BaseGestureDetector\n{\n\n    <span class=\"hljs-keyword\">protected<\/span> boolean mGestureInProgress;\n\n    <span class=\"hljs-keyword\">protected<\/span> MotionEvent mPreMotionEvent;\n    <span class=\"hljs-keyword\">protected<\/span> MotionEvent mCurrentMotionEvent;\n\n    <span class=\"hljs-keyword\">protected<\/span> Context mContext;\n\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title\">BaseGestureDetector<\/span>(Context context)\n    {\n        mContext = context;\n    }\n\n\n    <span class=\"hljs-keyword\">public<\/span> boolean <span class=\"hljs-title\">onToucEvent<\/span>(MotionEvent <span class=\"hljs-keyword\">event<\/span>)\n    {\n\n        <span class=\"hljs-keyword\">if<\/span> (!mGestureInProgress)\n        {\n            handleStartProgressEvent(<span class=\"hljs-keyword\">event<\/span>);\n        } <span class=\"hljs-keyword\">else<\/span>\n        {\n            handleInProgressEvent(<span class=\"hljs-keyword\">event<\/span>);\n        }\n\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">true<\/span>;\n\n    }\n\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">abstract<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">handleInProgressEvent<\/span>(MotionEvent <span class=\"hljs-keyword\">event<\/span>);\n\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">abstract<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">handleStartProgressEvent<\/span>(MotionEvent <span class=\"hljs-keyword\">event<\/span>);\n\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">abstract<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">updateStateByEvent<\/span>(MotionEvent <span class=\"hljs-keyword\">event<\/span>);\n\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">resetState<\/span>()\n    {\n        <span class=\"hljs-keyword\">if<\/span> (mPreMotionEvent != <span class=\"hljs-keyword\">null<\/span>)\n        {\n            mPreMotionEvent.recycle();\n            mPreMotionEvent = <span class=\"hljs-keyword\">null<\/span>;\n        }\n        <span class=\"hljs-keyword\">if<\/span> (mCurrentMotionEvent != <span class=\"hljs-keyword\">null<\/span>)\n        {\n            mCurrentMotionEvent.recycle();\n            mCurrentMotionEvent = <span class=\"hljs-keyword\">null<\/span>;\n        }\n        mGestureInProgress = <span class=\"hljs-keyword\">false<\/span>;\n    }\n\n\n}<\/code><\/pre>\n<p>\u4f60\u53ef\u80fd\u4f1a\u8bf4\uff0c\u4e00\u4e2amove\u624b\u52bf\u641e\u8fd9\u4e48\u591a\u4ee3\u7801\uff0c\u592a\u9ebb\u70e6\u4e86\u3002\u7684\u786e\u662f\u7684\uff0cmove\u624b\u52bf\u7684\u68c0\u6d4b\u975e\u5e38\u7b80\u5355\uff0c\u90a3\u4e48\u4e4b\u6240\u4ee5\u8fd9\u4e48\u5199\u5462\uff0c\u4e3b\u8981\u662f\u4e3a\u4e86\u53ef\u4ee5\u590d\u7528\uff0c\u6bd4\u5982\u73b0\u5728\u6709\u4e00\u5806\u7684<code>XXXGestureDetector<\/code>\uff0c\u5f53\u6211\u4eec\u9700\u8981\u76d1\u542c\u4ec0\u4e48\u624b\u52bf\uff0c\u5c31\u76f4\u63a5\u62ff\u4e2adetector\u6765\u68c0\u6d4b\u591a\u65b9\u4fbf\u3002\u6211\u76f8\u4fe1\u5927\u5bb6\u80af\u5b9a\u4e5f\u90c1\u95f7\u8fc7Google\uff0c\u4e3a\u4ec0\u4e48\u53ea\u6709<code>ScaleGestureDetector<\/code>\u800c\u6ca1\u6709<code>RotateGestureDetector<\/code>\u5462\u3002<\/li>\n<\/ul>\n<p>\u6839\u636e\u4e0a\u8ff0\uff0c\u5927\u5bb6\u5e94\u8be5\u7406\u89e3\u4e86\u4e3a\u4ec0\u4e48\u8981\u8fd9\u4e48\u505a\uff0c\u5f53\u65f6\u4e0d\u5f3a\u5236\uff0c\u6bcf\u4e2a\u4eba\u90fd\u6709\u4e2a\u6027\u3002<\/p>\n<blockquote><p>\u4e0d\u8fc7\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff1a\u4e0a\u9762\u8fd9\u4e2a\u624b\u52bf\u68c0\u6d4b\u7684\u5199\u6cd5\uff0c\u4e0d\u662f\u6211\u60f3\u7684\uff0c\u800c\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u9879\u76ee<a href=\"https:\/\/github.com\/rharter\/android-gesture-detectors\">https:\/\/github.com\/rharter\/android-gesture-detectors<\/a>\uff0c\u91cc\u9762\u5305\u542b\u5f88\u591a\u7684\u624b\u52bf\u68c0\u6d4b\u3002\u5bf9\u5e94\u7684\u535a\u6587\u662f\uff1a<a href=\"http:\/\/code.almeros.com\/android-multitouch-gesture-detectors#.VibzzhArJXg\">http:\/\/code.almeros.com\/android-multitouch-gesture-detectors#.VibzzhArJXg<\/a>\u90a3\u9762\u4e0a\u9762\u4e24\u4e2a\u7c7b\u5c31\u662f\u6211\u5077\u5b66\u4e86\u7684~ \u54c8<\/p><\/blockquote>\n<h2 id=\"\u56db\u6d4b\u8bd5\"><a name=\"t4\"><\/a>\u56db\u3001\u6d4b\u8bd5<\/h2>\n<p>\u6d4b\u8bd5\u5176\u5b9e\u6ca1\u6492\u597d\u8bf4\u7684\u4e86\uff0c\u5c31\u662f\u628a\u6211\u4eec\u7684LargeImageView\u653e\u5165\u5e03\u5c40\u6587\u4ef6\uff0c\u7136\u540eActivity\u91cc\u9762\u53bb\u8bbe\u7f6einputstream\u4e86\u3002<\/p>\n<pre class=\"prettyprint\"><code class=\"language-xml hljs  has-numbering\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">RelativeLayout<\/span> <span class=\"hljs-attribute\">xmlns:android<\/span>=<span class=\"hljs-value\">\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span>\n                <span class=\"hljs-attribute\">xmlns:tools<\/span>=<span class=\"hljs-value\">\"http:\/\/schemas.android.com\/tools\"<\/span>\n                <span class=\"hljs-attribute\">android:layout_width<\/span>=<span class=\"hljs-value\">\"match_parent\"<\/span>\n                <span class=\"hljs-attribute\">android:layout_height<\/span>=<span class=\"hljs-value\">\"match_parent\"<\/span>&gt;<\/span>\n\n\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-title\">com.zhy.blogcodes.largeImage.view.LargeImageView\n<\/span>        <span class=\"hljs-attribute\">android:id<\/span>=<span class=\"hljs-value\">\"@+id\/id_largetImageview\"<\/span>\n        <span class=\"hljs-attribute\">android:layout_width<\/span>=<span class=\"hljs-value\">\"match_parent\"<\/span>\n        <span class=\"hljs-attribute\">android:layout_height<\/span>=<span class=\"hljs-value\">\"match_parent\"<\/span>\/&gt;<\/span>\n\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-title\">RelativeLayout<\/span>&gt;<\/span><\/code><\/pre>\n<p>\u7136\u540e\u5728Activity\u91cc\u9762\u53bb\u8bbe\u7f6e\u56fe\u7247\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\"language-java hljs  has-numbering\"><span class=\"hljs-keyword\">package<\/span> com.zhy.blogcodes.largeImage;\n\n<span class=\"hljs-keyword\">import<\/span> android.os.Bundle;\n<span class=\"hljs-keyword\">import<\/span> android.support.v7.app.AppCompatActivity;\n\n<span class=\"hljs-keyword\">import<\/span> com.zhy.blogcodes.R;\n<span class=\"hljs-keyword\">import<\/span> com.zhy.blogcodes.largeImage.view.LargeImageView;\n\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\n<span class=\"hljs-keyword\">import<\/span> java.io.InputStream;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">LargeImageViewActivity<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title\">AppCompatActivity<\/span>\n{<\/span>\n    <span class=\"hljs-keyword\">private<\/span> LargeImageView mLargeImageView;\n\n    <span class=\"hljs-annotation\">@Override<\/span>\n    <span class=\"hljs-keyword\">protected<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title\">onCreate<\/span>(Bundle savedInstanceState)\n    {\n        <span class=\"hljs-keyword\">super<\/span>.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_large_image_view);\n\n        mLargeImageView = (LargeImageView) findViewById(R.id.id_largetImageview);\n        <span class=\"hljs-keyword\">try<\/span>\n        {\n            InputStream inputStream = getAssets().open(<span class=\"hljs-string\">\"world.jpg\"<\/span>);\n            mLargeImageView.setInputStream(inputStream);\n\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e)\n        {\n            e.printStackTrace();\n        }\n\n\n    }\n\n}<\/code><\/pre>\n<p>\u6548\u679c\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/img.blog.csdn.net\/20151021103123812\" alt=\"\" width=\"320px\" \/><\/p>\n<p>ok\uff0c\u90a3\u4e48\u5230\u6b64\uff0c\u663e\u793a\u5de8\u56fe\u7684\u65b9\u6848\u4ee5\u53ca\u8be6\u7ec6\u7684\u4ee3\u7801\u5c31\u63cf\u8ff0\u5b8c\u6210\u4e86\uff0c\u603b\u4f53\u8fd8\u662f\u975e\u5e38\u7b80\u5355\u7684\u3002<br \/>\n\u4f46\u662f\uff0c\u5728\u5b9e\u9645\u7684\u9879\u76ee\u4e2d\uff0c\u53ef\u80fd\u4f1a\u6709\u66f4\u591a\u7684\u9700\u6c42\uff0c\u6bd4\u5982\u589e\u52a0\u653e\u5927\u3001\u7f29\u5c0f\uff1b\u589e\u52a0\u5feb\u6ed1\u624b\u52bf\u7b49\u7b49\uff0c\u90a3\u4e48\u5927\u5bb6\u53ef\u4ee5\u53bb\u53c2\u8003\u8fd9\u4e2a\u5e93\uff1a<a href=\"https:\/\/github.com\/johnnylambada\/WorldMap\">https:\/\/github.com\/johnnylambada\/WorldMap<\/a>\uff0c\u8be5\u5e93\u57fa\u672c\u5b9e\u73b0\u4e86\u7edd\u5927\u591a\u6570\u7684\u9700\u6c42\uff0c\u5927\u5bb6\u6839\u636e\u672c\u6587\u8fd9\u4e2a\u601d\u8def\u518d\u53bb\u770b\u8fd9\u4e2a\u5e93\uff0c\u4e5f\u4f1a\u7b80\u5355\u5f88\u591a\uff0c\u5b9a\u5236\u8d77\u6765\u4e5f\u5bb9\u6613\u3002\u6211\u8fd9\u4e2a\u5730\u56fe\u7684\u56fe\u5c31\u662f\u8be5\u5e93\u91cc\u9762\u63d0\u4f9b\u7684\u3002<\/p>\n<p>\u54c8\uff0c\u638c\u63e1\u4e86\u8fd9\u4e2a\uff0c\u4ee5\u540e\u9762\u8bd5\u8fc7\u7a0b\u4e2d\u4e5f\u53ef\u4ee5\u6084\u6084\u7684\u88c5\u4e00\u628a\u4e86\uff0c\u5f53\u4f60\u4f18\u96c5\u7684\u7b54\u5b8candroid\u52a0\u8f7d\u56fe\u7247\u7684\u65b9\u6848\u4ee5\u540e\uff0c\u7136\u540e\u63a5\u4e00\u53e5\uff0c\u5176\u5b9e\u8fd8\u6709\u4e00\u79cd\u60c5\u51b5\uff0c\u5c31\u662f\u9ad8\u6e05\u663e\u793a\u5de8\u56fe\uff0c\u90a3\u4e48\u6211\u4eec\u5e94\u8be5\u2026\u76f8\u4fe1\u9762\u8bd5\u5b98\u5bf9\u4f60\u7684\u5370\u8c61\u4f1a\u597d\u5f88\u591a~ have a nice day ~<\/p>\n<p><a href=\"https:\/\/github.com\/hongyangAndroid\/Android_Blog_Demos\">\u6e90\u7801\u70b9\u51fb\u4e0b\u8f7d<\/a><\/p>\n<h2 id=\"\u53c2\u8003\u94fe\u63a5\"><a name=\"t5\"><\/a>\u53c2\u8003\u94fe\u63a5<\/h2>\n<ul>\n<li><a href=\"http:\/\/code.almeros.com\/android-multitouch-gesture-detectors#.VibzzhArJXg\">http:\/\/code.almeros.com\/android-multitouch-gesture-detectors#.VibzzhArJXg<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/rharter\/android-gesture-detectors\">https:\/\/github.com\/rharter\/android-gesture-detectors<\/a><\/li>\n<li><a href=\"https:\/\/github.com\/johnnylambada\/WorldMap\">https:\/\/github.com\/johnnylambada\/WorldMap<\/a><\/li>\n<\/ul>\n<p>\u539f\u6587\u51fa\u5904:<a href=\"http:\/\/blog.csdn.net\/lmj623565791\/article\/details\/49300989\">Android \u9ad8\u6e05\u52a0\u8f7d\u5de8\u56fe\u65b9\u6848 \u62d2\u7edd\u538b\u7f29\u56fe\u7247<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6982\u8ff0 \u8ddd\u79bb\u4e0a\u4e00\u7bc7\u535a\u5ba2\u6709\u6bb5\u65f6\u95f4\u6ca1\u66f4\u65b0\u4e86\uff0c\u4e3b\u8981\u662f\u6700\u8fd1\u6709\u4e9b\u79c1\u4e8b\u5bfc\u81f4\u7684\uff0c\u90a3\u4e48\u5c31\u5148\u6765\u4e00\u7bc7\u7b80\u5355\u4e00\u70b9\u7684\u535a\u5ba2\u8109\u52a8\u56de\u6765\u3002 \u5bf9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[66],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1206"}],"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=1206"}],"version-history":[{"count":3,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1206\/revisions"}],"predecessor-version":[{"id":3556,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1206\/revisions\/3556"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}