{"id":1089,"date":"2015-12-23T18:10:10","date_gmt":"2015-12-23T10:10:10","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=1089"},"modified":"2026-08-15T17:04:16","modified_gmt":"2026-08-15T09:04:16","slug":"android%e5%b1%9e%e6%80%a7%e5%8a%a8%e7%94%bb%e5%ae%8c%e5%85%a8%e8%a7%a3%e6%9e%90%e4%b8%8b%ef%bc%8cinterpolator%e5%92%8cviewpropertyanimator%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=1089","title":{"rendered":"Android\u5c5e\u6027\u52a8\u753b\u5b8c\u5168\u89e3\u6790(\u4e0b)\uff0cInterpolator\u548cViewPropertyAnimator\u7684\u7528\u6cd5"},"content":{"rendered":"

\"\"<\/a><\/p>\n

\u5927\u5bb6\u597d\uff0c\u6b22\u8fce\u7ee7\u7eed\u56de\u5230Android\u5c5e\u6027\u52a8\u753b\u5b8c\u5168\u89e3\u6790\u3002\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u5f53\u4e2d\u6211\u4eec\u5b66\u4e60\u4e86\u5c5e\u6027\u52a8\u753b\u7684\u4e00\u4e9b\u8fdb\u9636\u6280\u5de7\uff0c\u5305\u62ecValueAnimator\u548cObjectAnimator\u7684\u9ad8\u7ea7\u7528\u6cd5\uff0c\u90a3\u4e48\u9664\u4e86\u8fd9\u4e9b\u4e4b\u5916\uff0c\u5f53\u7136\u8fd8\u6709\u4e00\u4e9b\u5176\u5b83\u7684\u9ad8\u7ea7\u6280\u5de7\u5728\u7b49\u7740\u6211\u4eec\u5b66\u4e60\uff0c\u56e0\u6b64\u672c\u7bc7\u6587\u7ae0\u5c31\u5bf9\u6574\u4e2a\u5c5e\u6027\u52a8\u753b\u5b8c\u5168\u89e3\u6790\u7cfb\u5217\u6536\u4e2a\u5c3e\uff0c\u6765\u5b66\u4e60\u4e00\u4e0b\u5269\u4e0b\u7684\u975e\u5e38\u91cd\u8981\u7684\u9ad8\u7ea7\u6280\u5de7\u3002<\/p>\n

\u53e6\u5916\uff0c\u672c\u7bc7\u6587\u7ae0\u4e2d\u4f7f\u7528\u7684\u4ee3\u7801\u662f\u5efa\u7acb\u5728\u4e0a\u7bc7\u6587\u7ae0\u57fa\u7840\u4e4b\u4e0a\u7684\uff0c\u5982\u679c\u4f60\u8fd8\u6ca1\u6709\u9605\u8bfb\u8fc7\u524d\u9762\u7684\u6587\u7ae0\uff0c\u5efa\u8bae\u5148\u53bb\u53c2\u8003\u9605\u8bfb\u4e00\u4e0b\u00a0Android\u5c5e\u6027\u52a8\u753b\u5b8c\u5168\u89e3\u6790(\u4e2d)\uff0cValueAnimator\u548cObjectAnimator\u7684\u9ad8\u7ea7\u7528\u6cd5<\/strong>\u00a0<\/a>\u3002<\/p>\n

<\/a>Interpolator\u7684\u7528\u6cd5<\/h2>\n

Interpolator\u8fd9\u4e2a\u4e1c\u897f\u5f88\u96be\u8fdb\u884c\u7ffb\u8bd1\uff0c\u76f4\u8bd1\u8fc7\u6765\u7684\u8bdd\u662f\u8865\u95f4\u5668\u7684\u610f\u601d\uff0c\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u53ef\u4ee5\u63a7\u5236\u52a8\u753b\u7684\u53d8\u5316\u901f\u7387\uff0c\u6bd4\u5982\u53bb\u5b9e\u73b0\u4e00\u79cd\u975e\u7ebf\u6027\u8fd0\u52a8\u7684\u52a8\u753b\u6548\u679c\u3002\u90a3\u4e48\u4ec0\u4e48\u53eb\u505a\u975e\u7ebf\u6027\u8fd0\u52a8\u7684\u52a8\u753b\u6548\u679c\u5462\uff1f\u5c31\u662f\u8bf4\u52a8\u753b\u6539\u53d8\u7684\u901f\u7387\u4e0d\u662f\u4e00\u6210\u4e0d\u53d8\u7684\uff0c\u50cf\u52a0\u901f\u8fd0\u52a8\u4ee5\u53ca\u51cf\u901f\u8fd0\u52a8\u90fd\u5c5e\u4e8e\u975e\u7ebf\u6027\u8fd0\u52a8\u3002<\/p>\n

\u4e0d\u8fc7Interpolator\u5e76\u4e0d\u662f\u5c5e\u6027\u52a8\u753b\u4e2d\u65b0\u589e\u7684\u6280\u672f\uff0c\u5b9e\u9645\u4e0a\u4eceAndroid 1.0\u7248\u672c\u5f00\u59cb\u5c31\u4e00\u76f4\u5b58\u5728Interpolator\u63a5\u53e3\u4e86\uff0c\u800c\u4e4b\u524d\u7684\u8865\u95f4\u52a8\u753b\u5f53\u7136\u4e5f\u662f\u652f\u6301\u8fd9\u4e2a\u529f\u80fd\u7684\u3002\u53ea\u4e0d\u8fc7\u5728\u5c5e\u6027\u52a8\u753b\u4e2d\u65b0\u589e\u4e86\u4e00\u4e2aTimeInterpolator\u63a5\u53e3\uff0c\u8fd9\u4e2a\u63a5\u53e3\u662f\u7528\u4e8e\u517c\u5bb9\u4e4b\u524d\u7684Interpolator\u7684\uff0c\u8fd9\u4f7f\u5f97\u6240\u6709\u8fc7\u53bb\u7684Interpolator\u5b9e\u73b0\u7c7b\u90fd\u53ef\u4ee5\u76f4\u63a5\u62ff\u8fc7\u6765\u653e\u5230\u5c5e\u6027\u52a8\u753b\u5f53\u4e2d\u4f7f\u7528\uff0c\u90a3\u4e48\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u73b0\u5728TimeInterpolator\u63a5\u53e3\u7684\u6240\u6709\u5b9e\u73b0\u7c7b\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0cTimeInterpolator\u63a5\u53e3\u5df2\u7ecf\u6709\u975e\u5e38\u591a\u7684\u5b9e\u73b0\u7c7b\u4e86\uff0c\u8fd9\u4e9b\u90fd\u662fAndroid\u7cfb\u7edf\u5185\u7f6e\u597d\u7684\u5e76\u4e14\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u7684Interpolator\u3002\u6bcf\u4e2aInterpolator\u90fd\u6709\u5b83\u5404\u81ea\u7684\u5b9e\u73b0\u6548\u679c\uff0c\u6bd4\u5982\u8bf4AccelerateInterpolator\u5c31\u662f\u4e00\u4e2a\u52a0\u901f\u8fd0\u52a8\u7684Interpolator\uff0c\u800cDecelerateInterpolator\u5c31\u662f\u4e00\u4e2a\u51cf\u901f\u8fd0\u52a8\u7684Interpolator\u3002<\/p>\n

\u6211\u89c9\u5f97\u7ec6\u5fc3\u7684\u670b\u53cb\u5e94\u8be5\u65e9\u5df2\u7ecf\u53d1\u73b0\u4e86\uff0c\u5728\u524d\u9762\u4e24\u7bc7\u6587\u7ae0\u5f53\u4e2d\u6211\u4eec\u6240\u5b66\u5230\u7684\u6240\u6709\u5c5e\u6027\u52a8\u753b\uff0c\u5176\u5b9e\u90fd\u4e0d\u662f\u5728\u8fdb\u884c\u4e00\u79cd\u7ebf\u7a0b\u8fd0\u52a8\u3002\u6bd4\u5982\u8bf4\u5728\u201c\u4e0a\u201d\u7bc7\u6587\u7ae0\u4e2d\u4f7f\u7528ValueAnimator\u6240\u6253\u5370\u7684\u503c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0c\u4e00\u5f00\u59cb\u7684\u503c\u53d8\u5316\u901f\u5ea6\u660e\u663e\u6bd4\u8f83\u6162\uff0c\u4ec50.0\u5f00\u5934\u7684\u5c31\u6253\u5370\u4e864\u6b21\uff0c\u4e4b\u540e\u5f00\u59cb\u52a0\u901f\uff0c\u6700\u540e\u9636\u6bb5\u53c8\u5f00\u59cb\u51cf\u901f\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u5f88\u660e\u663e\u5730\u770b\u51fa\u8fd9\u4e00\u4e2a\u5148\u52a0\u901f\u540e\u51cf\u901f\u7684Interpolator\u3002<\/p>\n

\u90a3\u4e48\u518d\u6765\u770b\u4e00\u4e0b\u5728\u201c\u4e2d\u201d\u7bc7\u6587\u7ae0\u4e2d\u5b8c\u6210\u7684\u5c0f\u7403\u79fb\u52a8\u52a0\u53d8\u8272\u7684\u529f\u80fd\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

\u4ece\u4e0a\u56fe\u4e2d\u6211\u4eec\u660e\u663e\u53ef\u4ee5\u770b\u51fa\uff0c\u5c0f\u7403\u4e00\u5f00\u59cb\u8fd0\u52a8\u901f\u5ea6\u6bd4\u8f83\u6162\uff0c\u7136\u540e\u9010\u6e10\u52a0\u901f\uff0c\u4e2d\u95f4\u7684\u90e8\u5206\u8fd0\u52a8\u901f\u5ea6\u5c31\u6bd4\u8f83\u5feb\uff0c\u63a5\u4e0b\u6765\u5f00\u59cb\u51cf\u901f\uff0c\u6700\u540e\u7f13\u7f13\u505c\u4f4f\u3002\u53e6\u5916\u989c\u8272\u53d8\u5316\u4e5f\u662f\u8fd9\u79cd\u89c4\u5f8b\uff0c\u4e00\u5f00\u59cb\u989c\u8272\u53d8\u5316\u7684\u6bd4\u8f83\u6162\uff0c\u4e2d\u95f4\u989c\u8272\u53d8\u5316\u7684\u5f88\u5feb\uff0c\u6700\u540e\u9636\u6bb5\u989c\u8272\u53d8\u5316\u7684\u53c8\u6bd4\u8f83\u6162\u3002<\/p>\n

\u4ece\u4ee5\u4e0a\u51e0\u70b9\u6211\u4eec\u5c31\u53ef\u4ee5\u603b\u7ed3\u51fa\u4e00\u4e2a\u7ed3\u8bba\u4e86\uff0c\u4f7f\u7528\u5c5e\u6027\u52a8\u753b\u65f6\uff0c\u7cfb\u7edf\u9ed8\u8ba4\u7684Interpolator\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u5148\u52a0\u901f\u540e\u51cf\u901f\u7684Interpolator\uff0c\u5bf9\u5e94\u7684\u5b9e\u73b0\u7c7b\u5c31\u662fAccelerateDecelerateInterpolator\u3002<\/p>\n

\u5f53\u7136\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u5f88\u8f7b\u677e\u5730\u4fee\u6539\u8fd9\u4e00\u9ed8\u8ba4\u5c5e\u6027\uff0c\u5c06\u5b83\u66ff\u6362\u6210\u4efb\u610f\u4e00\u4e2a\u7cfb\u7edf\u5185\u7f6e\u597d\u7684Interpolator\u3002\u5c31\u62ff\u201c\u4e2d\u201d\u7bc7\u6587\u7ae0\u4e2d\u7684\u4ee3\u7801\u6765\u4e3e\u4f8b\u5427\uff0cMyAnimView\u4e2d\u7684startAnimation()\u65b9\u6cd5\u662f\u5f00\u542f\u52a8\u753b\u6548\u679c\u7684\u5165\u53e3\uff0c\u8fd9\u91cc\u6211\u4eec\u5bf9Point\u5bf9\u8c61\u7684\u5750\u6807\u7a0d\u505a\u4e00\u4e0b\u4fee\u6539\uff0c\u8ba9\u5b83\u53d8\u6210\u4e00\u79cd\u5782\u76f4\u6389\u843d\u7684\u6548\u679c\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

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private<\/span> void<\/span> startAnimation<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>startPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>endPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> getHeight<\/span>(<\/span>)<\/span> –<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ValueAnimator <\/span>anim<\/span> =<\/span> ValueAnimator<\/span>.<\/span>ofObject<\/span>(<\/span>new<\/span> PointEvaluator<\/span>(<\/span>)<\/span>,<\/span> startPoint<\/span>,<\/span> endPoint<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>addUpdateListener<\/span>(<\/span>new<\/span> ValueAnimator<\/span>.<\/span>AnimatorUpdateListener<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> void<\/span> onAnimationUpdate<\/span>(<\/span>ValueAnimator <\/span>animation<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>currentPoint<\/span> =<\/span> (<\/span>Point<\/span>)<\/span> animation<\/span>.<\/span>getAnimatedValue<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>invalidate<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setDuration<\/span>(<\/span>2000<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>start<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u91cc\u4e3b\u8981\u662f\u5bf9Point\u6784\u9020\u51fd\u6570\u4e2d\u7684\u5750\u6807\u503c\u8fdb\u884c\u4e86\u4e00\u4e0b\u6539\u52a8\uff0c\u90a3\u4e48\u73b0\u5728\u5c0f\u7403\u8fd0\u52a8\u7684\u52a8\u753b\u6548\u679c\u5e94\u8be5\u662f\u4ece\u5c4f\u5e55\u6b63\u4e2d\u592e\u7684\u9876\u90e8\u6389\u843d\u5230\u5e95\u90e8\u3002\u4f46\u662f\u73b0\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5c0f\u7403\u7684\u4e0b\u964d\u901f\u5ea6\u80af\u5b9a\u662f\u5148\u52a0\u901f\u540e\u51cf\u901f\u7684\uff0c\u8fd9\u4e0d\u7b26\u5408\u7269\u7406\u7684\u5e38\u8bc6\u89c4\u5f8b\uff0c\u5982\u679c\u628a\u5c0f\u7403\u89c6\u4e3a\u4e00\u4e2a\u81ea\u7531\u843d\u4f53\u7684\u8bdd\uff0c\u90a3\u4e48\u4e0b\u964d\u7684\u901f\u5ea6\u5e94\u8be5\u662f\u8d8a\u6765\u8d8a\u5feb\u7684\u3002\u6211\u4eec\u600e\u6837\u624d\u80fd\u6539\u53d8\u8fd9\u4e00\u9ed8\u8ba4\u884c\u4e3a\u5462\uff1f\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u8c03\u7528Animator\u7684setInterpolator()\u65b9\u6cd5\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u8981\u6c42\u4f20\u5165\u4e00\u4e2a\u5b9e\u73b0TimeInterpolator\u63a5\u53e3\u7684\u5b9e\u4f8b\uff0c\u90a3\u4e48\u6bd4\u5982\u8bf4\u6211\u4eec\u60f3\u8981\u5b9e\u73b0\u5c0f\u7403\u4e0b\u964d\u8d8a\u6765\u8d8a\u5feb\u7684\u6548\u679c\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528AccelerateInterpolator\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

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private<\/span> void<\/span> startAnimation<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>startPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>endPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> getHeight<\/span>(<\/span>)<\/span> –<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ValueAnimator <\/span>anim<\/span> =<\/span> ValueAnimator<\/span>.<\/span>ofObject<\/span>(<\/span>new<\/span> PointEvaluator<\/span>(<\/span>)<\/span>,<\/span> startPoint<\/span>,<\/span> endPoint<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>addUpdateListener<\/span>(<\/span>new<\/span> ValueAnimator<\/span>.<\/span>AnimatorUpdateListener<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> void<\/span> onAnimationUpdate<\/span>(<\/span>ValueAnimator <\/span>animation<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>currentPoint<\/span> =<\/span> (<\/span>Point<\/span>)<\/span> animation<\/span>.<\/span>getAnimatedValue<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>invalidate<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setInterpolator<\/span>(<\/span>new<\/span> AccelerateInterpolator<\/span>(<\/span>2f<\/span>)<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setDuration<\/span>(<\/span>2500<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>start<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4ee3\u7801\u5f88\u7b80\u5355\uff0c\u8fd9\u91cc\u8c03\u7528\u4e86setInterpolator()\u65b9\u6cd5\uff0c\u7136\u540e\u4f20\u5165\u4e86\u4e00\u4e2aAccelerateInterpolator\u7684\u5b9e\u4f8b\uff0c\u6ce8\u610fAccelerateInterpolator\u7684\u6784\u5efa\u51fd\u6570\u53ef\u4ee5\u63a5\u6536\u4e00\u4e2afloat\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u8fd9\u4e2a\u53c2\u6570\u662f\u7528\u4e8e\u63a7\u5236\u52a0\u901f\u5ea6\u7684\u3002\u73b0\u5728\u8fd0\u884c\u4e00\u4e0b\u4ee3\u7801\uff0c\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

OK\uff0c\u6548\u679c\u975e\u5e38\u660e\u663e\uff0c\u8bf4\u660e\u6211\u4eec\u5df2\u7ecf\u6210\u529f\u66ff\u6362\u6389\u4e86\u9ed8\u8ba4\u7684Interpolator\uff0cAccelerateInterpolator\u786e\u5b9e\u662f\u751f\u6548\u4e86\u3002\u4f46\u662f\u73b0\u5728\u7684\u52a8\u753b\u6548\u679c\u770b\u4e0a\u53bb\u4ecd\u7136\u662f\u602a\u602a\u7684\uff0c\u56e0\u4e3a\u4e00\u4e2a\u5c0f\u7403\u4ece\u5f88\u9ad8\u7684\u5730\u65b9\u6389\u843d\u5230\u5730\u9762\u4e0a\u76f4\u63a5\u5c31\u9759\u6b62\u4e86\uff0c\u8fd9\u4e5f\u662f\u4e0d\u7b26\u5408\u7269\u7406\u89c4\u5f8b\u7684\uff0c\u5c0f\u7403\u649e\u51fb\u5230\u5730\u9762\u4e4b\u540e\u5e94\u8be5\u8981\u53cd\u5f39\u8d77\u6765\uff0c\u7136\u540e\u518d\u6b21\u843d\u4e0b\uff0c\u63a5\u7740\u518d\u53cd\u5f39\u8d77\u6765\uff0c\u53c8\u518d\u6b21\u843d\u4e0b\uff0c\u4ee5\u6b64\u53cd\u590d\uff0c\u6700\u540e\u9759\u6b62\u3002\u8fd9\u4e2a\u529f\u80fd\u6211\u4eec\u5f53\u7136\u53ef\u4ee5\u81ea\u5df1\u53bb\u5199\uff0c\u53ea\u4e0d\u8fc7\u6bd4\u8f83\u590d\u6742\uff0c\u6240\u5e78\u7684\u662f\uff0cAndroid\u7cfb\u7edf\u4e2d\u5df2\u7ecf\u63d0\u4f9b\u597d\u4e86\u8fd9\u6837\u4e00\u79cdInterpolator\uff0c\u6211\u4eec\u53ea\u9700\u8981\u7b80\u5355\u5730\u66ff\u6362\u4e00\u4e0b\u5c31\u53ef\u4ee5\u5b8c\u6210\u4e0a\u9762\u7684\u63cf\u8ff0\u7684\u6548\u679c\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
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1<\/div>\n
2<\/div>\n
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15<\/div>\n<\/div>\n<\/td>\n
\n
\n
private<\/span> void<\/span> startAnimation<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>startPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>endPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> getHeight<\/span>(<\/span>)<\/span> –<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ValueAnimator <\/span>anim<\/span> =<\/span> ValueAnimator<\/span>.<\/span>ofObject<\/span>(<\/span>new<\/span> PointEvaluator<\/span>(<\/span>)<\/span>,<\/span> startPoint<\/span>,<\/span> endPoint<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>addUpdateListener<\/span>(<\/span>new<\/span> ValueAnimator<\/span>.<\/span>AnimatorUpdateListener<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> void<\/span> onAnimationUpdate<\/span>(<\/span>ValueAnimator <\/span>animation<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>currentPoint<\/span> =<\/span> (<\/span>Point<\/span>)<\/span> animation<\/span>.<\/span>getAnimatedValue<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>invalidate<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setInterpolator<\/span>(<\/span>new<\/span> BounceInterpolator<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setDuration<\/span>(<\/span>3000<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>start<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u53ea\u662f\u5c06\u8bbe\u7f6e\u7684Interpolator\u6362\u6210\u4e86BounceInterpolator\u7684\u5b9e\u4f8b\uff0c\u800cBounceInterpolator\u5c31\u662f\u4e00\u79cd\u53ef\u4ee5\u6a21\u62df\u7269\u7406\u89c4\u5f8b\uff0c\u5b9e\u73b0\u53cd\u590d\u5f39\u8d77\u6548\u679c\u7684Interpolator\u3002\u53e6\u5916\u8fd8\u5c06\u6574\u4f53\u7684\u52a8\u753b\u65f6\u95f4\u7a0d\u5fae\u5ef6\u957f\u4e86\u4e00\u70b9\uff0c\u56e0\u4e3a\u5c0f\u7403\u53cd\u590d\u5f39\u8d77\u9700\u8981\u6bd4\u4e4b\u524d\u66f4\u957f\u7684\u65f6\u95f4\u3002\u73b0\u5728\u91cd\u65b0\u8fd0\u884c\u4e00\u4e0b\u4ee3\u7801\uff0c\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

OK\uff01\u6548\u679c\u8fd8\u662f\u975e\u5e38\u4e0d\u9519\u7684\u3002\u90a3\u4e48\u8fd9\u91cc\u6211\u4eec\u53ea\u662f\u9009\u4e86\u51e0\u4e2a\u7cfb\u7edf\u5b9e\u73b0\u597d\u7684Interpolator\uff0c\u7531\u4e8e\u5185\u7f6eInterpolator\u975e\u5e38\u591a\uff0c\u5c31\u4e0d\u4e00\u4e00\u8fdb\u884c\u8bb2\u89e3\u4e86\uff0c\u5927\u5bb6\u53ef\u4ee5\u81ea\u5df1\u53bb\u4f7f\u7528\u4e00\u4e0b\u5176\u5b83\u7684\u51e0\u79cdInterpolator\u6765\u770b\u4e00\u770b\u6548\u679c\u3002<\/p>\n

\u4f46\u662f\uff0c\u53ea\u4f1a\u7528\u4e00\u4e0b\u7cfb\u7edf\u63d0\u4f9b\u597d\u7684Interpolator\uff0c\u6211\u4eec\u663e\u7136\u5bf9\u81ea\u5df1\u7684\u8981\u6c42\u5c31\u592a\u4f4e\u4e86\uff0c\u65e2\u7136\u662f\u5b66\u4e60\u5c5e\u6027\u52a8\u753b\u7684\u9ad8\u7ea7\u7528\u6cd5\uff0c\u90a3\u4e48\u81ea\u7136\u8981\u5c06\u5b83\u7814\u7a76\u900f\u4e86\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u4e00\u4e0bInterpolator\u7684\u5185\u90e8\u5b9e\u73b0\u673a\u5236\u662f\u4ec0\u4e48\u6837\u7684\uff0c\u5e76\u4e14\u6765\u5c1d\u8bd5\u5199\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684Interpolator\u3002<\/p>\n

\u9996\u5148\u770b\u4e00\u4e0bTimeInterpolator\u7684\u63a5\u53e3\u5b9a\u4e49\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

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\n\n\n\n
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1<\/div>\n
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20<\/div>\n<\/div>\n<\/td>\n
\n
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\/**<\/span><\/div>\n
* A time interpolator defines the rate of change of an animation. This allows animations<\/span><\/div>\n
* to have non-linear motion, such as acceleration and deceleration.<\/span><\/div>\n
*\/<\/span><\/div>\n
public<\/span> interface<\/span> TimeInterpolator<\/span> {<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>\/**<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 * Maps a value representing the elapsed fraction of an animation to a value that represents<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 * the interpolated fraction. This interpolated value is then multiplied by the change in<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 * value of an animation to derive the animated value at the current elapsed animation time.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 * @param input A value between 0 and 1.0 indicating our current point<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0in the animation where 0 represents the start and 1.0 represents<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0the end<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 * @return The interpolation value. This value can be more than 1.0 for<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 interpolators which overshoot their targets, or less than 0 for<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 interpolators that undershoot their targets.<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 *\/<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>float<\/span> getInterpolation<\/span>(<\/span>float<\/span> input<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

OK\uff0c\u63a5\u53e3\u8fd8\u662f\u975e\u5e38\u7b80\u5355\u7684\uff0c\u53ea\u6709\u4e00\u4e2agetInterpolation()\u65b9\u6cd5\u3002\u5927\u5bb6\u6709\u5174\u8da3\u53ef\u4ee5\u901a\u8fc7\u6ce8\u91ca\u6765\u5bf9\u8fd9\u4e2a\u63a5\u53e3\u8fdb\u884c\u8be6\u89e3\u7684\u4e86\u89e3\uff0c\u8fd9\u91cc\u6211\u5c31\u7b80\u5355\u89e3\u91ca\u4e00\u4e0b\uff0cgetInterpolation()\u65b9\u6cd5\u4e2d\u63a5\u6536\u4e00\u4e2ainput\u53c2\u6570\uff0c\u8fd9\u4e2a\u53c2\u6570\u7684\u503c\u4f1a\u968f\u7740\u52a8\u753b\u7684\u8fd0\u884c\u800c\u4e0d\u65ad\u53d8\u5316\uff0c\u4e0d\u8fc7\u5b83\u7684\u53d8\u5316\u662f\u975e\u5e38\u6709\u89c4\u5f8b\u7684\uff0c\u5c31\u662f\u6839\u636e\u8bbe\u5b9a\u7684\u52a8\u753b\u65f6\u957f\u5300\u901f\u589e\u52a0\uff0c\u53d8\u5316\u8303\u56f4\u662f0\u52301\u3002\u4e5f\u5c31\u662f\u8bf4\u5f53\u52a8\u753b\u4e00\u5f00\u59cb\u7684\u65f6\u5019input\u7684\u503c\u662f0\uff0c\u5230\u52a8\u753b\u7ed3\u675f\u7684\u65f6\u5019input\u7684\u503c\u662f1\uff0c\u800c\u4e2d\u95f4\u7684\u503c\u5219\u662f\u968f\u7740\u52a8\u753b\u8fd0\u884c\u7684\u65f6\u957f\u57280\u52301\u4e4b\u95f4\u53d8\u5316\u7684\u3002<\/p>\n

\u8bf4\u5230\u8fd9\u4e2ainput\u7684\u503c\uff0c\u6211\u89c9\u5f97\u6709\u4e0d\u5c11\u670b\u53cb\u53ef\u80fd\u4f1a\u8054\u60f3\u5230\u6211\u4eec\u5728\u201c\u4e2d\u201d\u7bc7\u6587\u7ae0\u4e2d\u4f7f\u7528\u8fc7\u7684fraction\u503c\u3002\u90a3\u4e48\u8fd9\u91cc\u7684input\u548cfraction\u6709\u4ec0\u4e48\u5173\u7cfb\u6216\u8005\u533a\u522b\u5462\uff1f\u7b54\u6848\u5f88\u7b80\u5355\uff0cinput\u7684\u503c\u51b3\u5b9a\u4e86fraction\u7684\u503c\u3002input\u7684\u503c\u662f\u7531\u7cfb\u7edf\u7ecf\u8fc7\u8ba1\u7b97\u540e\u4f20\u5165\u5230getInterpolation()\u65b9\u6cd5\u4e2d\u7684\uff0c\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u81ea\u5df1\u5b9e\u73b0getInterpolation()\u65b9\u6cd5\u4e2d\u7684\u7b97\u6cd5\uff0c\u6839\u636einput\u7684\u503c\u6765\u8ba1\u7b97\u51fa\u4e00\u4e2a\u8fd4\u56de\u503c\uff0c\u800c\u8fd9\u4e2a\u8fd4\u56de\u503c\u5c31\u662ffraction\u4e86\u3002<\/p>\n

\u56e0\u6b64\uff0c\u6700\u7b80\u5355\u7684\u60c5\u51b5\u5c31\u662finput\u503c\u548cfraction\u503c\u662f\u76f8\u540c\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u7531\u4e8einput\u503c\u662f\u5300\u901f\u589e\u52a0\u7684\uff0c\u56e0\u800cfraction\u7684\u503c\u4e5f\u662f\u5300\u901f\u589e\u52a0\u7684\uff0c\u6240\u4ee5\u52a8\u753b\u7684\u8fd0\u52a8\u60c5\u51b5\u4e5f\u662f\u5300\u901f\u7684\u3002\u7cfb\u7edf\u4e2d\u5185\u7f6e\u7684LinearInterpolator\u5c31\u662f\u4e00\u79cd\u5300\u901f\u8fd0\u52a8\u7684Interpolator\uff0c\u90a3\u4e48\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5b83\u7684\u6e90\u7801\u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

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1<\/div>\n
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22<\/div>\n<\/div>\n<\/td>\n
\n
\n
\/**<\/span><\/div>\n
* An interpolator where the rate of change is constant<\/span><\/div>\n
*\/<\/span><\/div>\n
@HasNativeInterpolator<\/span><\/div>\n
public<\/span> class<\/span> LinearInterpolator<\/span> extends<\/span> BaseInterpolator<\/span> implements<\/span> NativeInterpolatorFactory<\/span> {<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> LinearInterpolator<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> LinearInterpolator<\/span>(<\/span>Context <\/span>context<\/span>,<\/span> AttributeSet <\/span>attrs<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> float<\/span> getInterpolation<\/span>(<\/span>float<\/span> input<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> input<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>\/** @hide *\/<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> long<\/span> createNativeInterpolator<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> NativeInterpolatorFactoryHelper<\/span>.<\/span>createLinearInterpolator<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u91cc\u6211\u4eec\u53ea\u770bgetInterpolation()\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u6ca1\u6709\u4efb\u4f55\u903b\u8f91\uff0c\u5c31\u662f\u628a\u53c2\u6570\u4e2d\u4f20\u9012\u7684input\u503c\u76f4\u63a5\u8fd4\u56de\u4e86\uff0c\u56e0\u6b64fraction\u7684\u503c\u5c31\u662f\u7b49\u4e8einput\u7684\u503c\u7684\uff0c\u8fd9\u5c31\u662f\u5300\u901f\u8fd0\u52a8\u7684Interpolator\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n

\u5f53\u7136\u8fd9\u662f\u6700\u7b80\u5355\u7684\u4e00\u79cdInterpolator\u7684\u5b9e\u73b0\u4e86\uff0c\u6211\u4eec\u518d\u6765\u770b\u4e00\u4e2a\u7a0d\u5fae\u590d\u6742\u4e00\u70b9\u7684\u3002\u65e2\u7136\u73b0\u5728\u5927\u5bb6\u90fd\u77e5\u9053\u4e86\u7cfb\u7edf\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f7f\u7528\u7684\u662fAccelerateDecelerateInterpolator\uff0c\u90a3\u6211\u4eec\u5c31\u6765\u770b\u4e00\u4e0b\u5b83\u7684\u6e90\u7801\u5427\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\n
\n
\n
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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
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\n
1<\/div>\n
2<\/div>\n
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4<\/div>\n
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22<\/div>\n
23<\/div>\n
24<\/div>\n<\/div>\n<\/td>\n
\n
\n
\/**<\/span><\/div>\n
* An interpolator where the rate of change starts and ends slowly but<\/span><\/div>\n
* accelerates through the middle.<\/span><\/div>\n
* <\/span><\/div>\n
*\/<\/span><\/div>\n
@HasNativeInterpolator<\/span><\/div>\n
public<\/span> class<\/span> AccelerateDecelerateInterpolator <\/span>implements<\/span> Interpolator<\/span>,<\/span> NativeInterpolatorFactory<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> AccelerateDecelerateInterpolator<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>@SuppressWarnings<\/span>(<\/span>{<\/span>“UnusedDeclaration”<\/span>}<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> AccelerateDecelerateInterpolator<\/span>(<\/span>Context <\/span>context<\/span>,<\/span> AttributeSet <\/span>attrs<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> float<\/span> getInterpolation<\/span>(<\/span>float<\/span> input<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> (<\/span>float<\/span>)<\/span>(<\/span>Math<\/span>.<\/span>cos<\/span>(<\/span>(<\/span>input<\/span> +<\/span> 1<\/span>)<\/span> *<\/span> Math<\/span>.<\/span>PI<\/span>)<\/span> \/<\/span> 2.0f<\/span>)<\/span> +<\/span> 0.5f<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>\/** @hide *\/<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> long<\/span> createNativeInterpolator<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> NativeInterpolatorFactoryHelper<\/span>.<\/span>createAccelerateDecelerateInterpolator<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u4ee3\u7801\u867d\u7136\u6ca1\u6709\u53d8\u957f\u5f88\u591a\uff0c\u4f46\u662fgetInterpolation()\u65b9\u6cd5\u4e2d\u7684\u903b\u8f91\u5df2\u7ecf\u660e\u663e\u53d8\u590d\u6742\u4e86\uff0c\u4e0d\u518d\u662f\u7b80\u5355\u5730\u5c06\u53c2\u6570\u4e2d\u7684input\u8fdb\u884c\u8fd4\u56de\uff0c\u800c\u662f\u8fdb\u884c\u4e86\u4e00\u4e2a\u8f83\u4e3a\u590d\u6742\u7684\u6570\u5b66\u8fd0\u7b97\u3002\u90a3\u8fd9\u91cc\u6211\u4eec\u6765\u5206\u6790\u4e00\u4e0b\u5b83\u7684\u7b97\u6cd5\u5b9e\u73b0\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u7b97\u6cd5\u4e2d\u4e3b\u8981\u4f7f\u7528\u4e86\u4f59\u5f26\u51fd\u6570\uff0c\u7531\u4e8einput\u7684\u53d6\u503c\u8303\u56f4\u662f0\u52301\uff0c\u90a3\u4e48cos\u51fd\u6570\u4e2d\u7684\u53d6\u503c\u8303\u56f4\u5c31\u662f\u03c0\u52302\u03c0\u3002\u800ccos(\u03c0)\u7684\u7ed3\u679c\u662f-1\uff0ccos(2\u03c0)\u7684\u7ed3\u679c\u662f1\uff0c\u90a3\u4e48\u8fd9\u4e2a\u503c\u518d\u9664\u4ee52\u52a0\u4e0a0.5\u4e4b\u540e\uff0cgetInterpolation()\u65b9\u6cd5\u6700\u7ec8\u8fd4\u56de\u7684\u7ed3\u679c\u503c\u8fd8\u662f\u57280\u52301\u4e4b\u95f4\u3002\u53ea\u4e0d\u8fc7\u7ecf\u8fc7\u4e86\u4f59\u5f26\u8fd0\u7b97\u4e4b\u540e\uff0c\u6700\u7ec8\u7684\u7ed3\u679c\u4e0d\u518d\u662f\u5300\u901f\u589e\u52a0\u7684\u4e86\uff0c\u800c\u662f\u7ecf\u5386\u4e86\u4e00\u4e2a\u5148\u52a0\u901f\u540e\u51cf\u901f\u7684\u8fc7\u7a0b\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u7b97\u6cd5\u7684\u6267\u884c\u60c5\u51b5\u901a\u8fc7\u66f2\u7ebf\u56fe\u7684\u65b9\u5f0f\u7ed8\u5236\u51fa\u6765\uff0c\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u662f\u4e00\u4e2aS\u578b\u7684\u66f2\u7ebf\u56fe\uff0c\u5f53\u6a2a\u5750\u6807\u4ece0\u53d8\u5316\u52300.2\u7684\u65f6\u5019\uff0c\u7eb5\u5750\u6807\u7684\u53d8\u5316\u5e45\u5ea6\u5f88\u5c0f\uff0c\u4f46\u662f\u4e4b\u540e\u5c31\u5f00\u59cb\u660e\u663e\u52a0\u901f\uff0c\u6700\u540e\u6a2a\u5750\u6807\u4ece0.8\u53d8\u5316\u52301\u7684\u65f6\u5019\uff0c\u7eb5\u5750\u6807\u7684\u53d8\u5316\u5e45\u5ea6\u53c8\u53d8\u5f97\u5f88\u5c0f\u3002<\/p>\n

OK\uff0c\u901a\u8fc7\u5206\u6790LinearInterpolator\u548cAccelerateDecelerateInterpolator\u7684\u6e90\u7801\uff0c\u6211\u4eec\u5df2\u7ecf\u5bf9Interpolator\u7684\u5185\u90e8\u5b9e\u73b0\u673a\u5236\u6709\u4e86\u6bd4\u8f83\u6e05\u695a\u7684\u8ba4\u8bc6\u4e86\uff0c\u90a3\u4e48\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u5f00\u59cb\u5c1d\u8bd5\u7f16\u5199\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684Interpolator\u3002<\/p>\n

\u7f16\u5199\u81ea\u5b9a\u4e49Interpolator\u6700\u4e3b\u8981\u7684\u96be\u5ea6\u90fd\u662f\u5728\u4e8e\u6570\u5b66\u8ba1\u7b97\u65b9\u9762\u7684\uff0c\u7531\u4e8e\u6211\u6570\u5b66\u5e76\u4e0d\u662f\u5f88\u597d\uff0c\u56e0\u6b64\u8fd9\u91cc\u4e5f\u5c31\u5199\u4e00\u4e2a\u7b80\u5355\u70b9\u7684Interpolator\u6765\u7ed9\u5927\u5bb6\u6f14\u793a\u4e00\u4e0b\u3002\u65e2\u7136\u5c5e\u6027\u52a8\u753b\u9ed8\u8ba4\u7684Interpolator\u662f\u5148\u52a0\u901f\u540e\u51cf\u901f\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u8fd9\u91cc\u6211\u4eec\u5c31\u5bf9\u5b83\u8fdb\u884c\u4e00\u4e2a\u7b80\u5355\u7684\u4fee\u6539\uff0c\u8ba9\u5b83\u53d8\u6210\u5148\u51cf\u901f\u540e\u52a0\u901f\u7684\u65b9\u5f0f\u3002\u65b0\u5efaDecelerateAccelerateInterpolator\u7c7b\uff0c\u8ba9\u5b83\u5b9e\u73b0TimeInterpolator\u63a5\u53e3\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\n
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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
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14<\/div>\n<\/div>\n<\/td>\n
\n
\n
public<\/span> class<\/span> DecelerateAccelerateInterpolator<\/span> implements<\/span> TimeInterpolator<\/span>{<\/span><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> float<\/span> getInterpolation<\/span>(<\/span>float<\/span> input<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>float<\/span> result<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>if<\/span> (<\/span>input<\/span> <=<\/span> 0.5<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>result<\/span> =<\/span> (<\/span>float<\/span>)<\/span> (<\/span>Math<\/span>.<\/span>sin<\/span>(<\/span>Math<\/span>.<\/span>PI<\/span> *<\/span> input<\/span>)<\/span>)<\/span> \/<\/span> 2<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span> else<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>result<\/span> =<\/span> (<\/span>float<\/span>)<\/span> (<\/span>2<\/span> –<\/span> Math<\/span>.<\/span>sin<\/span>(<\/span>Math<\/span>.<\/span>PI<\/span> *<\/span> input<\/span>)<\/span>)<\/span> \/<\/span> 2<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> result<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
<\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u8fd9\u6bb5\u4ee3\u7801\u662f\u4f7f\u7528\u6b63\u5f26\u51fd\u6570\u6765\u5b9e\u73b0\u5148\u51cf\u901f\u540e\u52a0\u901f\u7684\u529f\u80fd\u7684\uff0c\u56e0\u4e3a\u6b63\u5f26\u51fd\u6570\u521d\u59cb\u5f27\u5ea6\u7684\u53d8\u5316\u503c\u975e\u5e38\u5927\uff0c\u521a\u597d\u548c\u4f59\u5f26\u51fd\u6570\u662f\u76f8\u53cd\u7684\uff0c\u800c\u968f\u7740\u5f27\u5ea6\u7684\u589e\u52a0\uff0c\u6b63\u5f26\u51fd\u6570\u7684\u53d8\u5316\u503c\u4e5f\u4f1a\u9010\u6e10\u53d8\u5c0f\uff0c\u8fd9\u6837\u4e5f\u5c31\u5b9e\u73b0\u4e86\u51cf\u901f\u7684\u6548\u679c\u3002\u5f53\u5f27\u5ea6\u5927\u4e8e\u03c0\/2\u4e4b\u540e\uff0c\u6574\u4e2a\u8fc7\u7a0b\u76f8\u53cd\u4e86\u8fc7\u6765\uff0c\u73b0\u5728\u6b63\u5f26\u51fd\u6570\u7684\u5f27\u5ea6\u53d8\u5316\u503c\u975e\u5e38\u5c0f\uff0c\u6e10\u6e10\u968f\u7740\u5f27\u5ea6\u7ee7\u7eed\u589e\u52a0\uff0c\u53d8\u5316\u503c\u8d8a\u6765\u8d8a\u5927\uff0c\u5f27\u5ea6\u5230\u03c0\u65f6\u7ed3\u675f\uff0c\u8fd9\u6837\u4ece0\u8fc7\u5ea6\u5230\u03c0\uff0c\u4e5f\u5c31\u5b9e\u73b0\u4e86\u5148\u51cf\u901f\u540e\u52a0\u901f\u7684\u6548\u679c\u3002<\/p>\n

\u540c\u6837\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u7b97\u6cd5\u7684\u6267\u884c\u60c5\u51b5\u901a\u8fc7\u66f2\u7ebf\u56fe\u7684\u65b9\u5f0f\u7ed8\u5236\u51fa\u6765\uff0c\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e5f\u662f\u4e00\u4e2aS\u578b\u7684\u66f2\u7ebf\u56fe\uff0c\u53ea\u4e0d\u8fc7\u66f2\u7ebf\u7684\u65b9\u5411\u548c\u521a\u624d\u662f\u76f8\u53cd\u7684\u3002\u4ece\u4e0a\u56fe\u4e2d\u6211\u4eec\u53ef\u4ee5\u5f88\u6e05\u695a\u5730\u770b\u51fa\u6765\uff0c\u4e00\u5f00\u59cb\u7eb5\u5750\u6807\u7684\u53d8\u5316\u5e45\u5ea6\u5f88\u5927\uff0c\u7136\u540e\u9010\u6e10\u53d8\u5c0f\uff0c\u6a2a\u5750\u6807\u52300.5\u7684\u65f6\u5019\u7eb5\u5750\u6807\u53d8\u5316\u5e45\u5ea6\u8d8b\u8fd1\u4e8e\u96f6\uff0c\u4e4b\u540e\u968f\u7740\u6a2a\u5750\u6807\u7ee7\u7eed\u589e\u52a0\u7eb5\u5750\u6807\u7684\u53d8\u5316\u5e45\u5ea6\u53c8\u5f00\u59cb\u53d8\u5927\uff0c\u7684\u786e\u662f\u5148\u51cf\u901f\u540e\u52a0\u901f\u7684\u6548\u679c\u3002<\/p>\n

\u90a3\u4e48\u73b0\u5728\u6211\u4eec\u5c06DecelerateAccelerateInterpolator\u5728\u4ee3\u7801\u4e2d\u8fdb\u884c\u66ff\u6362\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\n
\n
\n
<\/div>\n
<\/div>\n
<\/div>\n
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<\/div>\n
<\/div>\n

Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
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1<\/div>\n
2<\/div>\n
3<\/div>\n
4<\/div>\n
5<\/div>\n
6<\/div>\n
7<\/div>\n
8<\/div>\n
9<\/div>\n
10<\/div>\n
11<\/div>\n
12<\/div>\n
13<\/div>\n
14<\/div>\n
15<\/div>\n<\/div>\n<\/td>\n
\n
\n
private<\/span> void<\/span> startAnimation<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>startPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>Point <\/span>endPoint<\/span> =<\/span> new<\/span> Point<\/span>(<\/span>getWidth<\/span>(<\/span>)<\/span> \/<\/span> 2<\/span>,<\/span> getHeight<\/span>(<\/span>)<\/span> –<\/span> RADIUS<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>ValueAnimator <\/span>anim<\/span> =<\/span> ValueAnimator<\/span>.<\/span>ofObject<\/span>(<\/span>new<\/span> PointEvaluator<\/span>(<\/span>)<\/span>,<\/span> startPoint<\/span>,<\/span> endPoint<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>addUpdateListener<\/span>(<\/span>new<\/span> ValueAnimator<\/span>.<\/span>AnimatorUpdateListener<\/span>(<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>@Override<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>public<\/span> void<\/span> onAnimationUpdate<\/span>(<\/span>ValueAnimator <\/span>animation<\/span>)<\/span> {<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>currentPoint<\/span> =<\/span> (<\/span>Point<\/span>)<\/span> animation<\/span>.<\/span>getAnimatedValue<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>invalidate<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>}<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setInterpolator<\/span>(<\/span>new<\/span> DecelerateAccelerateInterpolator<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>setDuration<\/span>(<\/span>3000<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/span>anim<\/span>.<\/span>start<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u975e\u5e38\u7b80\u5355\uff0c\u5c31\u662f\u5c06DecelerateAccelerateInterpolator\u7684\u5b9e\u4f8b\u4f20\u5165\u5230setInterpolator()\u65b9\u6cd5\u5f53\u4e2d\u3002\u91cd\u65b0\u8fd0\u884c\u4e00\u4e0b\u4ee3\u7801\uff0c\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"\"<\/p>\n

OK\uff01\u5c0f\u7403\u7684\u8fd0\u52a8\u786e\u5b9e\u662f\u5148\u51cf\u901f\u540e\u52a0\u901f\u7684\u6548\u679c\uff0c\u8bf4\u660e\u6211\u4eec\u81ea\u5b9a\u4e49\u7684Interpolator\u5df2\u7ecf\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u4e86\u3002\u901a\u8fc7\u8fd9\u6837\u4e00\u4e2a\u7a0b\u5ea6\u7684\u5b66\u4e60\uff0c\u76f8\u4fe1\u5927\u5bb6\u5bf9\u5c5e\u6027\u52a8\u753bInterpolator\u7684\u7406\u89e3\u548c\u4f7f\u7528\u90fd\u8fbe\u5230\u4e86\u4e00\u4e2a\u6bd4\u8f83\u6df1\u523b\u7684\u5c42\u6b21\u4e86\u3002<\/p>\n

<\/a>ViewPropertyAnimator\u7684\u7528\u6cd5<\/h2>\n

ViewPropertyAnimator\u5176\u5b9e\u7b97\u4e0d\u4e0a\u4ec0\u4e48\u9ad8\u7ea7\u6280\u5de7\uff0c\u5b83\u7684\u7528\u6cd5\u683c\u5916\u7684\u7b80\u5355\uff0c\u53ea\u4e0d\u8fc7\u548c\u524d\u9762\u6240\u5b66\u7684\u6240\u6709\u5c5e\u6027\u52a8\u753b\u7684\u77e5\u8bc6\u4e0d\u540c\uff0c\u5b83\u5e76\u4e0d\u662f\u57283.0\u7cfb\u7edf\u5f53\u4e2d\u5f15\u5165\u7684\uff0c\u800c\u662f\u57283.1\u7cfb\u7edf\u5f53\u4e2d\u9644\u589e\u7684\u4e00\u4e2a\u65b0\u7684\u529f\u80fd\uff0c\u56e0\u6b64\u8fd9\u91cc\u6211\u4eec\u628a\u5b83\u4f5c\u4e3a\u6574\u4e2a\u5c5e\u6027\u52a8\u753b\u7cfb\u5217\u7684\u6536\u5c3e\u90e8\u5206\u3002<\/p>\n

\u6211\u4eec\u90fd\u77e5\u9053\uff0c\u5c5e\u6027\u52a8\u753b\u7684\u673a\u5236\u5df2\u7ecf\u4e0d\u662f\u518d\u9488\u5bf9\u4e8eView\u800c\u8fdb\u884c\u8bbe\u8ba1\u7684\u4e86\uff0c\u800c\u662f\u4e00\u79cd\u4e0d\u65ad\u5730\u5bf9\u503c\u8fdb\u884c\u64cd\u4f5c\u7684\u673a\u5236\uff0c\u5b83\u53ef\u4ee5\u5c06\u503c\u8d4b\u503c\u5230\u6307\u5b9a\u5bf9\u8c61\u7684\u6307\u5b9a\u5c5e\u6027\u4e0a\u3002\u4f46\u662f\uff0c\u5728\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u6211\u76f8\u4fe1\u5927\u5bb6\u4e3b\u8981\u90fd\u8fd8\u662f\u5bf9View\u8fdb\u884c\u52a8\u753b\u64cd\u4f5c\u7684\u3002Android\u5f00\u53d1\u56e2\u961f\u4e5f\u662f\u610f\u8bc6\u5230\u4e86\u8fd9\u4e00\u70b9\uff0c\u6ca1\u6709\u4e3aView\u7684\u52a8\u753b\u64cd\u4f5c\u63d0\u4f9b\u4e00\u79cd\u66f4\u52a0\u4fbf\u6377\u7684\u7528\u6cd5\u786e\u5b9e\u662f\u6709\u70b9\u592a\u4e0d\u4eba\u6027\u5316\u4e86\uff0c\u4e8e\u662f\u5728Android 3.1\u7cfb\u7edf\u5f53\u4e2d\u8865\u5145\u4e86ViewPropertyAnimator\u8fd9\u4e2a\u673a\u5236\u3002<\/p>\n

\u90a3\u6211\u4eec\u5148\u6765\u56de\u987e\u4e00\u4e0b\u4e4b\u524d\u7684\u7528\u6cd5\u5427\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u8ba9\u4e00\u4e2aTextView\u4ece\u5e38\u89c4\u72b6\u6001\u53d8\u6210\u900f\u660e\u72b6\u6001\uff0c\u5c31\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n

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<\/div>\n

Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n<\/div>\n<\/td>\n
\n
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ObjectAnimator <\/span>animator<\/span> =<\/span> ObjectAnimator<\/span>.<\/span>ofFloat<\/span>(<\/span>textview<\/span>,<\/span> “alpha”<\/span>,<\/span> 0f<\/span>)<\/span>;<\/span><\/div>\n
animator<\/span>.<\/span>start<\/span>(<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u770b\u4e0a\u53bb\u590d\u6742\u5417\uff1f\u597d\u50cf\u4e5f\u4e0d\u600e\u4e48\u590d\u6742\uff0c\u4f46\u786e\u5b9e\u4e5f\u4e0d\u600e\u4e48\u5bb9\u6613\u7406\u89e3\u3002\u6211\u4eec\u8981\u5c06\u64cd\u4f5c\u7684view\u3001\u5c5e\u6027\u3001\u53d8\u5316\u7684\u503c\u90fd\u4e00\u8d77\u4f20\u5165\u5230ObjectAnimator.ofFloat()\u65b9\u6cd5\u5f53\u4e2d\uff0c\u867d\u7136\u770b\u4e0a\u53bb\u4e5f\u6ca1\u5199\u51e0\u884c\u4ee3\u7801\uff0c\u4f46\u8fd9\u4e0d\u592a\u50cf\u662f\u6211\u4eec\u5e73\u65f6\u4f7f\u7528\u7684\u9762\u5411\u5bf9\u8c61\u7684\u601d\u7ef4\u3002<\/p>\n

\u90a3\u4e48\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u4f7f\u7528ViewPropertyAnimator\u6765\u5b9e\u73b0\u540c\u6837\u7684\u6548\u679c\uff0cViewPropertyAnimator\u63d0\u4f9b\u4e86\u66f4\u52a0\u6613\u61c2\u3001\u66f4\u52a0\u9762\u5411\u5bf9\u8c61\u7684API\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
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1<\/div>\n<\/div>\n<\/td>\n
\n
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textview<\/span>.<\/span>animate<\/span>(<\/span>)<\/span>.<\/span>alpha<\/span>(<\/span>0f<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u679c\u7136\u975e\u5e38\u7b80\u5355\uff01\u4e0d\u8fc7textview.animate()\u8fd9\u4e2a\u65b9\u6cd5\u662f\u600e\u4e48\u56de\u4e8b\u5462\uff1fanimate()\u65b9\u6cd5\u5c31\u662f\u5728Android 3.1\u7cfb\u7edf\u4e0a\u65b0\u589e\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u4e00\u4e2aViewPropertyAnimator\u5bf9\u8c61\uff0c\u4e5f\u5c31\u662f\u8bf4\u62ff\u5230\u8fd9\u4e2a\u5bf9\u8c61\u4e4b\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u8c03\u7528\u5b83\u7684\u5404\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u52a8\u753b\u6548\u679c\u4e86\uff0c\u8fd9\u91cc\u6211\u4eec\u8c03\u7528\u4e86alpha()\u65b9\u6cd5\u5e76\u8f6c\u51650\uff0c\u8868\u793a\u5c06\u5f53\u524d\u7684textview\u53d8\u6210\u900f\u660e\u72b6\u6001\u3002<\/p>\n

\u600e\u4e48\u6837\uff1f\u6bd4\u8d77\u4f7f\u7528ObjectAnimator\uff0cViewPropertyAnimator\u7684\u7528\u6cd5\u660e\u663e\u66f4\u52a0\u7b80\u5355\u6613\u61c2\u5427\u3002\u9664\u6b64\u4e4b\u5916\uff0cViewPropertyAnimator\u8fd8\u53ef\u4ee5\u5f88\u8f7b\u677e\u5730\u5c06\u591a\u4e2a\u52a8\u753b\u7ec4\u5408\u5230\u4e00\u8d77\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u8ba9textview\u8fd0\u52a8\u5230500,500\u8fd9\u4e2a\u5750\u6807\u70b9\u4e0a\uff0c\u5c31\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

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\n\n\n\n
\n
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1<\/div>\n<\/div>\n<\/td>\n
\n
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textview<\/span>.<\/span>animate<\/span>(<\/span>)<\/span>.<\/span>x<\/span>(<\/span>500<\/span>)<\/span>.<\/span>y<\/span>(<\/span>500<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u53ef\u4ee5\u770b\u51fa\uff0cViewPropertyAnimator\u662f\u652f\u6301\u8fde\u7f00\u7528\u6cd5\u7684\uff0c\u6211\u4eec\u60f3\u8ba9textview\u79fb\u52a8\u5230\u6a2a\u5750\u6807500\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u65f6\u8c03\u7528\u4e86x(500)\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u7136\u540e\u8ba9textview\u79fb\u52a8\u5230\u7eb5\u5750\u6807500\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u65f6\u8c03\u7528\u4e86y(500)\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u5c06\u6240\u6709\u60f3\u8981\u7ec4\u5408\u7684\u52a8\u753b\u901a\u8fc7\u8fd9\u79cd\u8fde\u7f00\u7684\u65b9\u5f0f\u62fc\u63a5\u8d77\u6765\uff0c\u8fd9\u6837\u5168\u90e8\u52a8\u753b\u5c31\u90fd\u4f1a\u4e00\u8d77\u88ab\u6267\u884c\u3002<\/p>\n

\u90a3\u4e48\u600e\u6837\u53bb\u8bbe\u5b9a\u52a8\u753b\u7684\u8fd0\u884c\u65f6\u957f\u5462\uff1f\u5f88\u7b80\u5355\uff0c\u4e5f\u662f\u901a\u8fc7\u8fde\u7f00\u7684\u65b9\u5f0f\u8bbe\u5b9a\u5373\u53ef\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u8ba9\u52a8\u753b\u8fd0\u884c5\u79d2\u949f\uff0c\u5c31\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n

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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
textview<\/span>.<\/span>animate<\/span>(<\/span>)<\/span>.<\/span>x<\/span>(<\/span>500<\/span>)<\/span>.<\/span>y<\/span>(<\/span>500<\/span>)<\/span>.<\/span>setDuration<\/span>(<\/span>5000<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u9664\u6b64\u4e4b\u5916\uff0c\u672c\u7bc7\u6587\u7ae0\u7b2c\u4e00\u90e8\u5206\u6240\u5b66\u7684Interpolator\u6280\u672f\u6211\u4eec\u4e5f\u53ef\u4ee5\u5e94\u7528\u5728ViewPropertyAnimator\u4e0a\u9762\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\n
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Java<\/span><\/p>\n<\/div>\n<\/div>\n

<\/div>\n
\n\n\n\n
\n
\n
1<\/div>\n
2<\/div>\n<\/div>\n<\/td>\n
\n
\n
textview<\/span>.<\/span>animate<\/span>(<\/span>)<\/span>.<\/span>x<\/span>(<\/span>500<\/span>)<\/span>.<\/span>y<\/span>(<\/span>500<\/span>)<\/span>.<\/span>setDuration<\/span>(<\/span>5000<\/span>)<\/span><\/div>\n
.<\/span>setInterpolator<\/span>(<\/span>new<\/span> BounceInterpolator<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u7528\u6cd5\u5f88\u7b80\u5355\uff0c\u540c\u6837\u4e5f\u662f\u4f7f\u7528\u8fde\u7f00\u7684\u65b9\u5f0f\u3002\u76f8\u4fe1\u5927\u5bb6\u73b0\u5728\u90fd\u5df2\u7ecf\u4f53\u9a8c\u51fa\u6765\u4e86\uff0cViewPropertyAnimator\u5176\u5b9e\u5e76\u6ca1\u6709\u4ec0\u4e48\u592a\u591a\u7684\u6280\u5de7\u53ef\u8a00\uff0c\u7528\u6cd5\u57fa\u672c\u90fd\u662f\u5927\u540c\u5c0f\u5f02\u7684\uff0c\u9700\u8981\u7528\u5230\u4ec0\u4e48\u529f\u80fd\u5c31\u8fde\u7f00\u4e00\u4e0b\uff0c\u56e0\u6b64\u66f4\u591a\u7684\u7528\u6cd5\u5927\u5bb6\u53ea\u9700\u8981\u53bb\u67e5\u9605\u4e00\u4e0b\u6587\u6863\uff0c\u770b\u770b\u8fd8\u652f\u6301\u54ea\u4e9b\u529f\u80fd\uff0c\u6709\u54ea\u4e9b\u63a5\u53e3\u53ef\u4ee5\u8c03\u7528\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n

\u90a3\u4e48\u9664\u4e86\u7528\u6cd5\u4e4b\u5916\uff0c\u5173\u4e8eViewPropertyAnimator\u6709\u51e0\u4e2a\u7ec6\u8282\u8fd8\u662f\u503c\u5f97\u5927\u5bb6\u6ce8\u610f\u4e00\u4e0b\u7684\uff1a<\/p>\n