{"id":277151,"date":"2024-05-16T15:13:32","date_gmt":"2024-05-16T07:13:32","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/277151.html"},"modified":"2024-05-16T15:13:38","modified_gmt":"2024-05-16T07:13:38","slug":"android-%e9%a1%b9%e7%9b%ae%e9%81%bf%e5%85%8d%e5%86%85%e5%ad%98%e6%ba%a2%e5%87%ba%e6%96%b9%e6%b3%95%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/277151.html","title":{"rendered":"Android \u9879\u76ee\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u65b9\u6cd5\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"Android<\/p>\n

\u907f\u514dAndroid\u9879\u76ee\u4e2d\u5185\u5b58\u6ea2\u51fa\u65b9\u6cd5\u5305\u542b\uff1a\u4f7f\u7528\u8f7b\u91cf\u7ea7\u5bf9\u8c61\u3001\u4f18\u5316Bitmap\u4f7f\u7528\u3001\u5408\u7406\u7ba1\u7406\u5185\u5b58\u3001\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3001\u5229\u7528Lint\u5de5\u5177\u68c0\u6d4b<\/strong>\u3002\u7279\u522b\u662f\u4f18\u5316Bitmap\u4f7f\u7528<\/strong>\uff0c\u56e0\u4e3a\u5728Android\u5e94\u7528\u4e2d\uff0c\u56fe\u7247\u5904\u7406\u5c24\u5176\u662fBitmap\u7684\u5904\u7406\u662f\u6700\u5e38\u89c1\u4e5f\u662f\u6700\u5bb9\u6613\u9020\u6210\u5185\u5b58\u6ea2\u51fa\u7684\u5730\u65b9\u3002Bitmap\u7531\u4e8e\u5176\u50cf\u7d20\u5bc6\u5ea6\u9ad8\uff0c\u5bf9\u5185\u5b58\u6d88\u8017\u6781\u5927\uff0c\u4e0d\u5408\u7406\u7684\u7ba1\u7406\u548c\u4f7f\u7528\u4f1a\u8f7b\u6613\u5bfc\u81f4OOM\uff08Out of Memory\uff0c\u5185\u5b58\u6ea2\u51fa\uff09\u3002\u56e0\u6b64\uff0c\u5bf9Bitmap\u8fdb\u884c\u9002\u5f53\u7684\u538b\u7f29\u3001\u590d\u7528\u4ee5\u53ca\u53ca\u65f6\u7684\u56de\u6536\uff0c\u662f\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u7684\u5173\u952e\u63aa\u65bd\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u8f7b\u91cf\u7ea7\u5bf9\u8c61<\/h3>\n<\/p>\n

\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\u521b\u5efa<\/h4>\n<\/p>\n

\u5728\u7f16\u7801\u65f6\u5e94\u5c3d\u91cf\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\u521b\u5efa\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u9759\u6001\u5de5\u5382\u65b9\u6cd5\u4ee3\u66ff\u6784\u9020\u51fd\u6570\u521b\u5efa\u5bf9\u8c61\uff0c\u4ee5\u51cf\u5c11\u5bf9\u8c61\u7684\u521b\u5efa\u6b21\u6570\u3002\u5728\u53ef\u80fd\u7684\u60c5\u51b5\u4e0b\uff0c\u91c7\u7528\u57fa\u672c\u6570\u636e\u7c7b\u578b\u800c\u975e\u5305\u88c5\u7c7b\u578b\uff0c\u51cf\u5c11\u81ea\u52a8\u88c5\u7bb1\u548c\u62c6\u7bb1\u7684\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n

\u91c7\u7528\u5bf9\u8c61\u6c60<\/h4>\n<\/p>\n

\u5bf9\u8c61\u6c60\u6280\u672f\u901a\u8fc7\u91cd\u590d\u4f7f\u7528\u5bf9\u8c61\uff0c\u51cf\u5c11\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\uff0c\u7279\u522b\u9002\u7528\u4e8e\u521b\u5efa\u6210\u672c\u9ad8\u6602\u4e14\u9891\u7e41\u4f7f\u7528\u7684\u5bf9\u8c61\u3002\u901a\u8fc7\u5bf9\u8c61\u6c60\u53ef\u4ee5\u6709\u6548\u51cf\u5c11\u5185\u5b58\u6ea2\u51fa\u7684\u98ce\u9669\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u4f18\u5316Bitmap\u4f7f\u7528<\/h3>\n<\/p>\n

Bitmap\u538b\u7f29<\/h4>\n<\/p>\n

\u5728\u5904\u7406\u56fe\u7247\u65f6\uff0c\u5e94\u6839\u636e\u663e\u793a\u9700\u6c42\u5bf9\u56fe\u7247\u8fdb\u884c\u538b\u7f29\u3002\u901a\u8fc7\u8c03\u6574\u56fe\u7247\u7684\u5c3a\u5bf8\u4e0e\u8d28\u91cf\uff0c\u51cf\u5c11Bitmap\u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u53ef\u4ee5\u4f7f\u7528BitmapFactory.Options<\/code>\u7684inSampleSize<\/code>\u5c5e\u6027\u6765\u5b9e\u73b0\u56fe\u7247\u7684\u538b\u7f29\u3002<\/p>\n<\/p>\n

Bitmap\u590d\u7528<\/h4>\n<\/p>\n

\u4eceAndroid 3.0\uff08API\u7ea7\u522b11\uff09\u5f00\u59cb\uff0c\u63d0\u4f9b\u4e86Bitmap\u7684\u590d\u7528\u673a\u5236\uff0c\u901a\u8fc7BitmapFactory.Options<\/code>\u7684inBitmap<\/code>\u5c5e\u6027\uff0c\u53ef\u4ee5\u590d\u7528\u5df2\u5b58\u5728\u7684Bitmap\u5185\u5b58\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5c24\u5176\u9002\u5408\u4e8e\u9891\u7e41\u52a0\u8f7d\u5927\u91cf\u56fe\u7247\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u5408\u7406\u7ba1\u7406\u5185\u5b58<\/h3>\n<\/p>\n

\u76d1\u63a7\u5185\u5b58\u4f7f\u7528<\/h4>\n<\/p>\n

\u5b9a\u671f\u4f7f\u7528Android Studio\u7684Profiler\u5de5\u5177\u76d1\u63a7\u5e94\u7528\u7684\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u53ca\u65f6\u53d1\u73b0\u5185\u5b58\u6cc4\u9732\u6216\u8fc7\u5ea6\u6d88\u8017\u7684\u95ee\u9898\u3002Android\u63d0\u4f9b\u4e86Runtime.getRuntime().maxMemory()<\/code>\uff0cRuntime.getRuntime().totalMemory()<\/code>\u548cRuntime.getRuntime().freeMemory()<\/code>\u7b49API\u5e2e\u52a9\u5f00\u53d1\u8005\u83b7\u53d6\u5e94\u7528\u7684\u5185\u5b58\u4f7f\u7528\u4fe1\u606f\u3002<\/p>\n<\/p>\n

\u5229\u7528\u5185\u5b58\u56de\u6536\u673a\u5236<\/h4>\n<\/p>\n

\u5728\u4e0d\u9700\u8981\u5bf9\u8c61\u65f6\uff0c\u53ca\u65f6\u5c06\u5176\u8bbe\u7f6e\u4e3anull<\/code>\u6216\u8c03\u7528System.gc()<\/code>\u8bf7\u6c42JVM\u6267\u884c\u5783\u573e\u56de\u6536\uff0c\u867d\u7136JVM\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u662f\u81ea\u52a8\u7684\uff0c\u4f46\u9002\u5f53\u7684\u63d0\u793a\u53ef\u4ee5\u52a0\u901f\u5783\u573e\u56de\u6536\u8fc7\u7a0b\uff0c\u51cf\u5c11\u5185\u5b58\u5360\u7528\u3002<\/p>\n<\/p>\n

\u56db\u3001\u907f\u514d\u5185\u5b58\u6cc4\u6f0f<\/h3>\n<\/p>\n

\u6ce8\u610fContext\u4f7f\u7528<\/h4>\n<\/p>\n

\u9519\u8bef\u7684\u6301\u6709Context\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u7279\u522b\u662f\u957f\u751f\u547d\u5468\u671f\u7684\u5bf9\u8c61\u6301\u6709\u77ed\u751f\u547d\u5468\u671f\u7684Activity\u6216Service\u7684Context\u3002\u89e3\u51b3\u65b9\u6848\u662f\uff0c\u5728\u975e\u5fc5\u8981\u60c5\u51b5\u4e0b\uff0c\u5c3d\u53ef\u80fd\u4f7f\u7528ApplicationContext\u4ee3\u66ffActivity\u6216Service Context\u3002<\/p>\n<\/p>\n

\u4f7f\u7528\u5f31\u5f15\u7528<\/h4>\n<\/p>\n

\u5bf9\u4e8e\u4e0d\u786e\u5b9a\u751f\u547d\u5468\u671f\u7684\u5bf9\u8c61\uff0c\u4f7f\u7528Java\u4e2d\u7684\u5f31\u5f15\u7528\uff08WeakReference\uff09\u6216\u8f6f\u5f15\u7528\uff08SoftReference\uff09\uff0c\u8fd9\u6837\u5728JVM\u8fdb\u884c\u5783\u573e\u56de\u6536\u65f6\uff0c\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u56de\u6536\u8fd9\u4e9b\u5bf9\u8c61\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u5229\u7528Lint\u5de5\u5177\u68c0\u6d4b<\/h3>\n<\/p>\n

Android Studio\u96c6\u6210\u7684Lint\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u68c0\u6d4b\u6f5c\u5728\u7684\u5185\u5b58\u6cc4\u6f0f\u548c\u6027\u80fd\u95ee\u9898\u3002\u5b9a\u671f\u8fd0\u884cLint\u68c0\u67e5\uff0c\u9075\u5faa\u5176\u5efa\u8bae\u4fee\u590d\u95ee\u9898\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u7684\u98ce\u9669\u3002<\/p>\n<\/p>\n

\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\u7684\u5b9e\u8df5\u4e0e\u5e94\u7528\uff0c\u53ef\u4ee5\u663e\u8457\u964d\u4f4eAndroid\u9879\u76ee\u4e2d\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u7684\u98ce\u9669\uff0c\u4ece\u800c\u63d0\u5347\u5e94\u7528\u7684\u7a33\u5b9a\u6027\u548c\u7528\u6237\u4f53\u9a8c\u3002\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u5e94\u5f53\u517b\u6210\u826f\u597d\u7684\u7f16\u7801\u4e60\u60ef\uff0c\u6ce8\u610f\u5185\u5b58\u4f7f\u7528\u6548\u7387\uff0c\u6301\u7eed\u4f18\u5316\u548c\u76d1\u63a7\uff0c\u6700\u5927\u7a0b\u5ea6\u5730\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u7684\u53d1\u751f\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u7684\u65b9\u6cd5\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n

    \n
  1. \n

    \u6b63\u786e\u7ba1\u7406\u5185\u5b58\u5206\u914d<\/strong>\uff1a\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u786e\u4fdd\u53ea\u5206\u914d\u6240\u9700\u7684\u5185\u5b58\u8d44\u6e90\uff0c\u5e76\u53ca\u65f6\u91ca\u653e\u4e0d\u518d\u4f7f\u7528\u7684\u8d44\u6e90\u3002\u53ef\u4ee5\u4f7f\u7528Java\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u6765\u81ea\u52a8\u91ca\u653e\u5360\u7528\u7684\u5185\u5b58\uff0c\u4e5f\u53ef\u4ee5\u624b\u52a8\u91ca\u653e\u8d44\u6e90\u6765\u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002<\/p>\n<\/li>\n

  2. \n

    \u907f\u514d\u5faa\u73af\u5f15\u7528<\/strong>\uff1a\u5faa\u73af\u5f15\u7528\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5f15\u7528\u53e6\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5e76\u4e14\u53e6\u4e00\u4e2a\u5bf9\u8c61\u4e5f\u5f15\u7528\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0c\u5c31\u5f62\u6210\u4e86\u5faa\u73af\u5f15\u7528\u3002\u4e3a\u4e86\u907f\u514d\u5faa\u73af\u5f15\u7528\uff0c\u53ef\u4ee5\u4f7f\u7528\u5f31\u5f15\u7528\uff08WeakReference\uff09\u6765\u5f15\u7528\u5bf9\u8c61\uff0c\u8fd9\u6837\u5f53\u4e00\u4e2a\u5bf9\u8c61\u4e0d\u518d\u88ab\u5176\u4ed6\u6b63\u5e38\u5f15\u7528\u6301\u6709\u65f6\uff0c\u5783\u573e\u56de\u6536\u5668\u5c06\u4f1a\u81ea\u52a8\u56de\u6536\u8be5\u5bf9\u8c61\u3002<\/p>\n<\/li>\n

  3. \n

    \u53ca\u65f6\u91ca\u653e\u8d44\u6e90<\/strong>\uff1a\u5728\u4f7f\u7528\u5b8c\u6bd5\u540e\uff0c\u786e\u4fdd\u53ca\u65f6\u91ca\u653e\u5360\u7528\u7684\u8d44\u6e90\uff0c\u6bd4\u5982\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u3001\u5173\u95ed\u6587\u4ef6\u6d41\u7b49\u3002\u8d44\u6e90\u91ca\u653e\u4e0d\u53ca\u65f6\u4f1a\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\uff0c\u4ece\u800c\u5f15\u53d1\u5185\u5b58\u6ea2\u51fa\u3002<\/p>\n<\/li>\n

  4. \n

    \u4f7f\u7528\u9002\u5f53\u7684\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u9009\u62e9\u9002\u5f53\u7684\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002\u6bd4\u5982\u4f7f\u7528SparseArray\u6765\u66ff\u6362HashMap\u53ef\u4ee5\u51cf\u5c11\u5185\u5b58\u6d88\u8017\u3002<\/p>\n<\/li>\n

  5. \n

    \u538b\u7f29\u56fe\u7247\u8d44\u6e90<\/strong>\uff1a\u56fe\u7247\u8d44\u6e90\u662fAndroid\u5f00\u53d1\u4e2d\u5e38\u89c1\u7684\u5185\u5b58\u6d88\u8017\u6e90\u3002\u4f7f\u7528\u5408\u9002\u7684\u56fe\u50cf\u538b\u7f29\u7b97\u6cd5\uff0c\u5c06\u56fe\u7247\u8d44\u6e90\u7684\u5927\u5c0f\u5c3d\u91cf\u51cf\u5c0f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u8282\u7701\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n<\/li>\n

  6. \n

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