{"id":642,"date":"2021-02-19T12:27:45","date_gmt":"2021-02-19T12:27:45","guid":{"rendered":"https:\/\/oimi.me\/?p=642"},"modified":"2021-02-19T12:27:45","modified_gmt":"2021-02-19T12:27:45","slug":"first-preview-of-android-12","status":"publish","type":"post","link":"https:\/\/myya.net\/index.php\/2021\/02\/19\/first-preview-of-android-12\/","title":{"rendered":"First preview of Android 12"},"content":{"rendered":"<div class=\"post-body\">\n<div class=\"post-content post-original\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-646\" src=\"https:\/\/cdn.oimi.me\/wp-content\/uploads\/2021\/02\/image6.png\" alt=\"\" width=\"784\" height=\"784\" 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href=\"https:\/\/developer.android.com\/about\/versions\/12\/feedback\">\u8bf7\u544a\u8bc9\u6211\u4eec\u60a8\u7684\u60f3\u6cd5<\/a>\uff01<\/p>\n<p>\u9664\u4e86\u6211\u4eec\u5728Android 12\u4e2d\u6240\u505a\u7684\u5de5\u4f5c\u5916\uff0c\u672c\u6708\u665a\u4e9b\u65f6\u5019\uff0c\u6211\u4eec\u5c06\u5206\u4eab\u53e6\u4e00\u4e2a\u5e2e\u52a9\u60a8\u66f4\u5bb9\u6613\u521b\u5efa\u826f\u597d\u7528\u6237\u4f53\u9a8c\u7684\u91cd\u8981\u5de5\u5177\uff1aJetpack Compose\uff0c\u6211\u4eec\u6784\u5efa\u672c\u673a\u7528\u6237\u754c\u9762\u7684\u73b0\u4ee3\u5de5\u5177\u5305\u3002<a href=\"http:\/\/goo.gle\/TheAndroidShow\">\u52a0\u5165\u6211\u4eec#TheAndroidShow<\/a>\uff0c\u4e86\u89e3\u592a\u5e73\u6d0b\u65f6\u95f42\u670824\u65e5\u4e0a\u53489\u70b9\u7684Jetpack Compose\u7684\u5e55\u540e\u82b1\u7d6e\uff0c\u5e76\u4f7f\u7528#TheAndroidShow\u5728\u63a8\u7279\u4e0a\u53d1\u5e03\u60a8\u7684Jetpack Compose\u95ee\u9898\uff0c\u8ba9\u4ed6\u4eec\u5728\u8282\u76ee\u4e2d\u73b0\u573a\u56de\u7b54\u3002<\/p>\n<h2><strong>\u4fe1\u4efb\u548c\u5b89\u5168<\/strong><\/h2>\n<p>\u9690\u79c1\u662f\u6211\u4eec\u6240\u505a\u4e00\u5207\u7684\u6838\u5fc3\uff0c\u5728Android 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href=\"https:\/\/blog.chromium.org\/2020\/02\/samesite-cookie-changes-in-february.html\">Chrome<\/a>\u548c\u5176\u4ed6\u6d4f\u89c8\u5668\u7684<a href=\"https:\/\/blog.chromium.org\/2020\/02\/samesite-cookie-changes-in-february.html\">\u66f4\u6539<\/a>\uff0cWebView\u5305\u542b\u65b0\u7684SameSite Cookie\u884c\u4e3a\uff0c\u4ee5\u63d0\u4f9b\u989d\u5916\u7684\u5b89\u5168\u6027\u548c\u9690\u79c1\uff0c\u5e76\u8ba9\u7528\u6237\u5bf9\u8de8\u7ad9\u70b9\u5982\u4f55\u4f7f\u7528cookie\u6709\u66f4\u5927\u7684\u900f\u660e\u5ea6\u548c\u63a7\u5236\u6743\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#samesite\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u53d7\u9650\u7684Netlink MAC<\/strong>-\u6211\u4eec\u7ee7\u7eed\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u8fc1\u79fb\u5230<a href=\"https:\/\/developer.android.com\/training\/articles\/user-data-ids\">\u4fdd\u62a4\u9690\u79c1\u7684\u53ef\u91cd\u7f6e\u6807\u8bc6\u7b26<\/a>\u3002\u4e3a\u4e86\u7f13\u89e3\u8bbe\u5907\u8303\u56f4\u7684Netlink MAC\u7684\u8fc1\u79fb\uff0c\u5728Android 11\u4e2d\uff0c\u6211\u4eec\u6839\u636eAPI\u7ea7\u522b30\u9650\u5236\u4e86\u5bf9\u5b83\u7684\u8bbf\u95ee\uff0c\u5728Android 12\u4e2d\uff0c\u6211\u4eec\u5bf9\u6240\u6709\u5e94\u7528\u7a0b\u5e8f\u5b9e\u65bd\u9650\u5236\u2014\u2014\u65e0\u8bba\u76ee\u6807SDK\u7ea7\u522b\u5982\u4f55\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-all#mac-address\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u66f4\u5b89\u5168\u7684\u7ec4\u4ef6\u5bfc\u51fa-<\/strong>\u4e3a\u4e86\u9632\u6b62\u5e94\u7528\u7a0b\u5e8f\u65e0\u610f\u4e2d\u5bfc\u51fa\u6d3b\u52a8\u3001\u670d\u52a1\u548c\u63a5\u6536\u5668\uff0c\u6211\u4eec\u6b63\u5728\u5c06<a href=\"https:\/\/developer.android.com\/guide\/topics\/manifest\/activity-element#exported\">android:exported<\/a>\u5c5e\u6027\u7684\u9ed8\u8ba4\u5904\u7406\u66f4\u6539\u4e3a\u66f4\u663e\u5f0f\u3002\u901a\u8fc7\u6b64\u66f4\u6539\uff0c\u58f0\u660e\u4e00\u4e2a\u6216\u591a\u4e2a\u610f\u56fe\u8fc7\u6ee4\u5668\u7684\u7ec4\u4ef6\u73b0\u5728\u5fc5\u987b\u663e\u5f0f\u58f0\u660eandroid:exported\u5c5e\u6027\u3002\u60a8\u5e94\u8be5\u68c0\u67e5\u6e05\u5355\u4e2d\u7684\u7ec4\u4ef6\uff0c\u4ee5\u907f\u514d\u4e0e\u6b64\u66f4\u6539\u76f8\u5173\u7684\u5b89\u88c5\u9519\u8bef\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#exported\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u66f4\u5b89\u5168\u5730\u5904\u7406\u610f\u56fe <\/strong>&#8211; \u4e3a\u4e86\u4f7f\u5904\u7406PendingIntents\u66f4\u5b89\u5168\uff0cAndroid 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href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12\">\u7684\u4fe1\u606f<\/a>\u3002<\/p>\n<h2><strong>\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\u5de5\u5177<\/strong><\/h2>\n<p>\u5728Android 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4\u4e0a\u4ee530fps\u7684\u901f\u5ea6\u4f20\u8f93\u4e00\u5206\u949f1080p\u89c6\u9891\u5927\u7ea6\u9700\u89819\u79d2\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u58f0\u660e\u5e94\u7528\u7a0b\u5e8f\u4e0d\u652f\u6301\u7684\u5a92\u4f53\u683c\u5f0f\u6765\u9009\u62e9\u4f7f\u7528\u8f6c\u7801\u670d\u52a1\u3002\u5bf9\u4e8e\u5f00\u53d1\u4eba\u5458\uff0c\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u652f\u6301HEVC\uff0c\u5982\u679c\u505a\u4e0d\u5230\uff0c\u8bf7\u542f\u7528\u517c\u5bb9\u7684\u5a92\u4f53\u8f6c\u7801\u3002\u8be5\u529f\u80fd\u5c06\u5728\u6240\u6709\u4f7f\u7528HEVC\u683c\u5f0f\u8fdb\u884c\u89c6\u9891\u6355\u83b7\u7684\u8bbe\u5907\u4e0a\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\u3002\u6211\u4eec\u5f88\u60f3\u542c\u542c\u4f60\u5bf9\u8fd9\u4e2a\u529f\u80fd\u7684\u53cd\u9988\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/features\/compatible-media-transcoding\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>AVIF\u56fe\u50cf\u652f\u6301<\/strong>-\u4e3a\u4e86\u4e3a\u60a8\u63d0\u4f9b\u66f4\u9ad8\u7684\u56fe\u50cf\u8d28\u91cf\u548c\u66f4\u6709\u6548\u7684\u538b\u7f29\uff0cAndroid 12\u5f15\u5165\u4e86\u5bf9<a href=\"https:\/\/en.wikipedia.org\/wiki\/AV1#AV1_Image_File_Format_(AVIF)\">AV1\u56fe\u50cf\u6587\u4ef6\u683c\u5f0f<\/a>\uff08AVIF\uff09\u7684\u5e73\u53f0\u652f\u6301\u3002AVIF\u662f\u4e00\u79cd\u5bb9\u5668\u683c\u5f0f\uff0c\u7528\u4e8e\u4f7f\u7528<a href=\"https:\/\/en.wikipedia.org\/wiki\/AV1\">AV1<\/a>\u7f16\u7801\u7684\u56fe\u50cf\u548c\u56fe\u50cf\u5e8f\u5217\u3002\u4e0e\u5176\u4ed6\u73b0\u4ee3\u56fe\u50cf\u683c\u5f0f\u4e00\u6837\uff0cAVIF\u5229\u7528\u4e86\u6765\u81ea\u89c6\u9891\u538b\u7f29\u7684\u5e27\u5185\u7f16\u7801\u5185\u5bb9\u3002\u4e0e\u65e7\u7684\u56fe\u50cf\u683c\u5f0f\uff08\u5982JPEG\uff09\u76f8\u6bd4\uff0c\u8fd9\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u76f8\u540c\u6587\u4ef6\u5927\u5c0f\u7684\u56fe\u50cf\u8d28\u91cf\u3002<\/p>\n<div id=\"flexParent\">\n<div class=\"separator\"><\/div>\n<div class=\"separator\"><\/div>\n<\/div>\n<p id=\"imgCaption\">\u6765\u6e90\uff1a\u6765\u81eaAVIF<a href=\"https:\/\/jakearchibald.com\/2020\/avif-has-landed\/demos\/compare\/?show=f1&amp;img=\/c\/f1-match-ff75e344.jpg\">\u7684\u56fe\u50cf\u6bd4\u8f83<\/a>\u7531\u6770\u514b\u00b7\u963f\u5947\u535a\u5c14\u5fb7<a href=\"https:\/\/jakearchibald.com\/2020\/avif-has-landed\/\">\u767b\u9646<\/a><\/p>\n<p><strong>\u524d\u53f0\u670d\u52a1\u4f18\u5316 <\/strong>&#8211; \u524d\u53f0\u670d\u52a1\u662f\u5e94\u7528\u7a0b\u5e8f\u7ba1\u7406\u67d0\u4e9b\u7c7b\u578b\u9762\u5411\u7528\u6237\u7684\u4efb\u52a1\u7684\u91cd\u8981\u65b9\u5f0f\uff0c\u4f46\u5f53\u8fc7\u5ea6\u4f7f\u7528\u65f6\uff0c\u5b83\u4eec\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u751a\u81f3\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u6b7b\u4ea1\u3002\u4e3a\u4e86\u786e\u4fdd\u7528\u6237\u83b7\u5f97\u66f4\u597d\u7684\u4f53\u9a8c\uff0c\u6211\u4eec\u5c06\u963b\u6b62\u9488\u5bf9\u65b0\u5e73\u53f0\u7684\u5e94\u7528\u7a0b\u5e8f\u4ece\u540e\u53f0\u5f00\u59cb\u7684\u524d\u53f0\u670d\u52a1\u3002\u4e3a\u4e86\u66f4\u5bb9\u6613\u6446\u8131\u8fd9\u79cd\u6a21\u5f0f\uff0c\u6211\u4eec\u6b63\u5728JobScheduler\u4e2d\u5f15\u5165\u4e00\u4e2a\u65b0\u7684<a href=\"https:\/\/developer.android.com\/reference\/android\/app\/job\/JobParameters.html#isExpeditedJob()\">\u5feb\u901f\u5de5\u4f5c<\/a>\uff0c\u8be5\u4f5c\u4e1a\u53ef\u4ee5\u63d0\u9ad8\u8fdb\u7a0b\u4f18\u5148\u7ea7\u3001\u7f51\u7edc\u8bbf\u95ee\uff0c\u5e76\u7acb\u5373\u8fd0\u884c\uff0c\u65e0\u8bba\u7535\u6c60\u4fdd\u62a4\u7a0b\u5e8f\u6216Doze\u7b49\u7535\u6e90\u9650\u5236\u5982\u4f55\u3002\u4e3a\u4e86\u5b9e\u73b0\u53cd\u5411\u517c\u5bb9\u6027\uff0c\u6211\u4eec\u8fd8\u5728\u6700\u65b0\u7248\u672c\u7684<a href=\"https:\/\/developer.android.com\/topic\/libraries\/architecture\/workmanager\">Jetpack WorkManager\u5e93<\/a>\u4e2d\u6784\u5efa\u4e86\u5feb\u901f\u5de5\u4f5c\u3002\u6b64\u5916\uff0c\u4e3a\u4e86\u51cf\u5c11\u7528\u6237\u7684\u6ce8\u610f\u529b\u5206\u6563\u6ce8\u610f\u529b\uff0c\u6211\u4eec\u73b0\u5728\u5c06\u4e00\u4e9b\u524d\u53f0\u670d\u52a1\u901a\u77e5\u7684\u663e\u793a\u5ef6\u8fdf\u957f\u8fbe10\u79d2\u3002\u8fd9\u4f7f\u77ed\u671f\u4efb\u52a1\u6709\u673a\u4f1a\u5728\u663e\u793a\u901a\u77e5\u4e4b\u524d\u5b8c\u6210\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#foreground-service-launch-restrictions\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u4e30\u5bcc\u7684\u5185\u5bb9\u63d2\u5165 <\/strong>&#8211; \u7528\u6237\u559c\u6b22\u56fe\u50cf\u3001\u89c6\u9891\u548c\u5176\u4ed6\u5bcc\u6709\u8868\u73b0\u529b\u7684\u5185\u5bb9\uff0c\u4f46\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u63d2\u5165\u548c\u79fb\u52a8\u8fd9\u4e9b\u5185\u5bb9\u5e76\u4e0d\u603b\u662f\u5bb9\u6613\u7684\u3002\u4e3a\u4e86\u4f7f\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u6613\u4e8e\u63a5\u6536\u4e30\u5bcc\u5185\u5bb9\uff0c\u6211\u4eec\u6b63\u5728\u5f15\u5165\u4e00\u4e2a\u65b0\u7684\u7edf\u4e00API\uff0c\u5141\u8bb8\u60a8\u63a5\u53d7\u6765\u81ea\u4efb\u4f55\u6765\u6e90\u7684\u5185\u5bb9\uff1a\u526a\u8d34\u677f\u3001\u952e\u76d8\u6216\u62d6\u653e\u3002\u60a8\u53ef\u4ee5\u5c06\u65b0\u754c\u9762<a href=\"https:\/\/developer.android.com\/reference\/android\/view\/OnReceiveContentListener\">OnReceiveContentListener<\/a>\u9644\u52a0\u5230UI\u7ec4\u4ef6\uff0c\u5e76\u5728\u901a\u8fc7\u4efb\u4f55\u673a\u5236\u63d2\u5165\u5185\u5bb9\u65f6\u83b7\u5f97\u56de\u8c03\u3002\u6b64\u56de\u8c03\u6210\u4e3a\u4ee3\u7801\u5904\u7406\u6240\u6709\u5185\u5bb9\u63d2\u5165\u7684\u5355\u4e00\u4f4d\u7f6e\uff0c\u4ece\u7eaf\u6587\u672c\u548c\u6837\u5f0f\u6587\u672c\u5230\u6807\u8bb0\u3001\u56fe\u50cf\u3001\u89c6\u9891\u3001\u97f3\u9891\u6587\u4ef6\u7b49\u3002\u4e3a\u4e86\u53cd\u517c\u5bb9\u6027\uff0c\u6211\u4eec\u5411<a href=\"https:\/\/developer.android.com\/reference\/androidx\/core\/view\/OnReceiveContentListener\">AndroidX<\/a>\u6dfb\u52a0\u4e86\u7edf\u4e00\u7684API\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/features\/unified-content-api\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u89e6\u89c9\u8026\u5408\u97f3\u9891\u6548\u679c<\/strong>-\u5728Android 12\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u624b\u673a\u7684\u632f\u52a8\u5668\u63d0\u4f9b\u97f3\u9891\u8026\u5408\u89e6\u89c9\u53cd\u9988\u3002\u632f\u52a8\u5f3a\u5ea6\u548c\u9891\u7387\u6765\u81ea\u97f3\u9891\u4f1a\u8bdd\uff0c\u5141\u8bb8\u60a8\u521b\u5efa\u66f4\u6c89\u6d78\u5f0f\u7684\u6e38\u620f\u548c\u97f3\u9891\u4f53\u9a8c\u3002\u4f8b\u5982\uff0c\u89c6\u9891\u901a\u8bdd\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u94c3\u58f0\u901a\u8fc7\u89e6\u89c9\u53cd\u9988\u6765\u8bc6\u522b\u6765\u7535\u8005\uff0c\u6216\u8005\u60a8\u53ef\u4ee5\u6a21\u62df\u8d5b\u8f66\u6e38\u620f\u4e2d\u7684\u5d0e\u5c96\u5730\u5f62\u3002<a href=\"https:\/\/developer.android.com\/reference\/android\/media\/audiofx\/HapticGenerator\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u624b\u52bf\u5bfc\u822a\u7684\u6c89\u6d78\u6a21\u5f0fAPI\u6539\u8fdb<\/strong>-\u6211\u4eec\u7b80\u5316\u4e86\u6c89\u6d78\u6a21\u5f0f\uff0c\u4f7f\u624b\u52bf\u5bfc\u822a\u66f4\u7b80\u5355\u3001\u66f4\u4e00\u81f4\uff0c\u4f8b\u5982\u89c2\u770b\u89c6\u9891\u3001\u9605\u8bfb\u4e66\u7c4d\u6216\u73a9\u6e38\u620f\u65f6\u3002\u5728\u4e0e\u6e38\u620f\u76f8\u5173\u7684\u5168\u5c4f\u4f53\u9a8c\u4e2d\uff0c\u6211\u4eec\u4ecd\u7136\u5728<a href=\"https:\/\/developer.android.com\/reference\/android\/view\/WindowInsetsController#BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE\">\u4fdd\u62a4\u5e94\u7528\u7a0b\u5e8f\u514d\u53d7\u610f\u5916\u624b\u52bf\u7684\u5f71\u54cd<\/a>\uff0c\u4f46\u5728\u6240\u6709\u5176\u4ed6\u5168\u5c4f\u6216\u6c89\u6d78\u5f0f\u4f53\u9a8c\uff08\u4f8b\u5982\u89c6\u9891\u67e5\u770b\u5668\u3001\u9605\u8bfb\u3001\u7167\u7247\u5e93\uff09\u4e2d\uff0c\u5bf9\u4e8e\u9488\u5bf9\u65b0\u5e73\u53f0\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4eec\u6b63\u5728\u66f4\u6539\u9ed8\u8ba4\u8bbe\u7f6e\uff0c\u5141\u8bb8\u7528\u6237\u4e00\u6b21\u5237\u4e00\u6b21\u6d4f\u89c8\u624b\u673a\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#immersive-mode-improvements\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u901a\u77e5\u7528\u6237\u754c\u9762\u66f4\u65b0<\/strong>-\u6211\u4eec\u6b63\u5728\u5237\u65b0\u901a\u77e5\u8bbe\u8ba1\uff0c\u4f7f\u5176\u66f4\u73b0\u4ee3\u3001\u66f4\u6613\u4e8e\u4f7f\u7528\u548c\u66f4\u5b9e\u7528\u3002\u5728\u7b2c\u4e00\u6b21\u9884\u89c8\u4e2d\uff0c\u60a8\u5c06\u6ce8\u610f\u5230\u62bd ?? \u548c\u63a7\u4ef6\u5bf9\u6a21\u677f\u672c\u8eab\u7684\u66f4\u6539\u3002\u6211\u4eec\u8fd8\u5728\u4f18\u5316\u6574\u4e2a\u7cfb\u7edf\u7684\u8fc7\u6e21\u548c\u52a8\u753b\uff0c\u4f7f\u5176\u66f4\u6d41\u7545\u3002\u4f5c\u4e3a\u66f4\u65b0\u7684\u4e00\u90e8\u5206\uff0c\u5bf9\u4e8e\u9488\u5bf9Android 12\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4eec\u6b63\u5728\u7528\u56fe\u6807\u7684\u81ea\u5b9a\u4e49\u5185\u5bb9\u88c5\u9970\u901a\u77e5\uff0c\u5e76\u6269\u5c55\u542f\u793a\u4ee5\u5339\u914d\u6240\u6709\u5176\u4ed6\u901a\u77e5\u3002<a href=\"http:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#custom-notifications\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>\u66f4\u5feb\u3001\u54cd\u5e94\u66f4\u5feb\u7684\u901a\u77e5<\/strong>-\u5f53\u7528\u6237\u70b9\u51fb\u901a\u77e5\u65f6\uff0c\u4ed6\u4eec\u5e0c\u671b\u7acb\u5373\u8df3\u8f6c\u5230\u5e94\u7528\u7a0b\u5e8f-\u8d8a\u5feb\u8d8a\u597d\u3002\u4e3a\u4e86\u6ee1\u8db3\u8fd9\u4e00\u671f\u671b\uff0c\u5f00\u53d1\u4eba\u5458\u5e94\u786e\u4fdd\u901a\u77e5\u70b9\u51fb\u89e6\u53d1\u6d3b\u52a8\u76f4\u63a5\u542f\u52a8\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u201c\u8e66\u5e8a\u201d\u2014\u2014\u4e2d\u4ecb\u5e7f\u64ad\u63a5\u6536\u5668\u6216\u670d\u52a1\u2014\u2014\u6765\u542f\u52a8\u6d3b\u52a8\u3002\u901a\u77e5\u8e66\u5e8a\u4f1a\u9020\u6210\u663e\u8457\u7684\u5ef6\u8fdf\uff0c\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002\u4e3a\u4e86\u4fdd\u6301\u901a\u77e5\u7684\u54cd\u5e94\u6027\uff0cAndroid 12\u5c06\u901a\u8fc7\u963b\u6b62\u901a\u77e5\u8e66\u5e8a\u542f\u52a8\u76ee\u6807\u6d3b\u52a8\u6765\u963b\u6b62\u5b83\u4eec\uff0c\u6211\u4eec\u8981\u6c42\u5f00\u53d1\u4eba\u5458\u8fdc\u79bb\u8fd9\u79cd\u6a21\u5f0f\u3002\u8fd9\u4e00\u53d8\u5316\u4ec5\u9002\u7528\u4e8e\u9488\u5bf9\u65b0\u5e73\u53f0\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u4f46\u5bf9\u4e8e\u6240\u6709\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4eec\u5c06\u663e\u793a\u656c\u9152\u8bcd\uff0c\u4f7f\u60a8\u548c\u7528\u6237\u53ef\u4ee5\u770b\u5230\u8e66\u5e8a\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/behavior-changes-12#notification-trampolines\">\u8fd9\u91cc\u66f4\u591a<\/a>\u3002<\/p>\n<p><strong>Improved Binder IPC calls <\/strong>&#8211; As part of our work on performance, we\u2019ve put a focus on reducing system variability. We\u2019ve taken a look at latency and workload distribution, and made optimizations that reduce the median experience from the tail end, or 99% percentile use case. In doing so, we\u2019ve targeted improvements to system binder calls adding lightweight caching strategies and focusing on removing lock contention to improve latency distribution. This has yielded roughly a 2x performance increase on Binder calls overall, with significant improvements in specific calls, for example a 47x improvement in <code>refContentProvider()<\/code>, 15x in <code>releaseWakeLock()<\/code>, and 7.9x in <code>JobScheduler.schedule()<\/code>.<\/p>\n<h2><strong>\u5e94\u7528\u7a0b\u5e8f\u517c\u5bb9\u6027<\/strong><\/h2>\n<p>\u5728\u63a8\u51fa\u65b0\u5e73\u53f0\u7248\u672c\u65f6\uff0c\u6211\u4eec\u81f4\u529b\u4e8e\u901a\u8fc7\u4f18\u5148\u8003\u8651\u5e94\u7528\u7a0b\u5e8f\u517c\u5bb9\u6027\uff0c\u4f7f\u66f4\u65b0\u66f4\u5feb\u3001\u66f4\u6d41\u7545\u3002\u5728Android 12\u4e2d\uff0c\u6211\u4eec\u8fdb\u884c\u4e86\u5927\u591a\u6570\u9762\u5411\u5e94\u7528\u7a0b\u5e8f\u7684\u66f4\u6539\uff0c\u4ee5\u7ed9\u60a8\u66f4\u591a\u65f6\u95f4\uff0c\u5e76\u66f4\u65b0\u4e86\u5de5\u5177\u548c\u6d41\u7a0b\uff0c\u4ee5\u5e2e\u52a9\u60a8\u66f4\u5feb\u505a\u597d\u51c6\u5907\u3002\u6211\u4eec\u8fd8\u4e3aGoogle Play\u7cfb\u7edf\u66f4\u65b0\u6dfb\u52a0\u4e86\u65b0\u529f\u80fd\uff0c\u4e3a\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u5728Android 12\u8bbe\u5907\u4e0a\u63d0\u4f9b\u66f4\u597d\u7684\u73af\u5883\u3002<\/p>\n<p><strong>\u901a\u8fc7Google Play\u66f4\u65b0\u66f4\u591aAndroid<\/strong>-\u6211\u4eec\u6b63\u5728\u7ee7\u7eed\u6269\u5927\u5bf9<a href=\"https:\/\/android-developers.googleblog.com\/2019\/05\/fresher-os-with-projects-treble-and-mainline.html\">Google Play\u7cfb\u7edf\u66f4\u65b0<\/a>\uff08Project Mainline\uff09\u7684\u6295\u8d44\uff0c\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u66f4\u4e00\u81f4\u3001\u66f4\u5b89\u5168\u7684\u8bbe\u5907\u73af\u5883\u3002\u5728Android 12\u4e2d\uff0c\u6211\u4eec\u6dfb\u52a0\u4e86Android\u8fd0\u884c\u65f6\uff08ART\uff09\u6a21\u5757\uff0c\u5141\u8bb8\u6211\u4eec\u5c06\u66f4\u65b0\u63a8\u9001\u5230\u8fd0\u884cAndroid 12\u7684\u8bbe\u5907\u4e0a\u7684\u6838\u5fc3\u8fd0\u884c\u65f6\u548c\u5e93\u3002\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u8fd0\u884c\u65f6\u6027\u80fd\u548c\u6b63\u786e\u6027\uff0c\u66f4\u6709\u6548\u5730\u7ba1\u7406\u5185\u5b58\uff0c\u5e76\u4f7fKotlin\u64cd\u4f5c\u66f4\u5feb\u2014\u2014\u6240\u6709\u8fd9\u4e9b\u90fd\u4e0d\u9700\u8981\u5b8c\u6574\u7684\u7cfb\u7edf\u66f4\u65b0\u3002\u6211\u4eec\u8fd8\u6269\u5c55\u4e86\u73b0\u6709\u6a21\u5757\u7684\u529f\u80fd\u2014\u2014\u4f8b\u5982\uff0c\u6211\u4eec\u6b63\u5728\u53ef\u66f4\u65b0\u6a21\u5757\u5185\u63d0\u4f9b\u517c\u5bb9\u7684\u5a92\u4f53\u8f6c\u7801\u529f\u80fd\u3002<\/p>\n<p><strong>\u4f18\u5316\u5e73\u677f\u7535\u8111\u3001\u53ef\u6298\u53e0\u8bbe\u5907\u548c\u7535\u89c6 <\/strong>&#8211; 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\u4e3a\u4e86\u4f7f\u60a8\u66f4\u5bb9\u6613\u6d4b\u8bd5\u53ef\u80fd\u5f71\u54cd\u5e94\u7528\u7a0b\u5e8f\u7684\u9009\u5165\u66f4\u6539\uff0c\u6211\u4eec\u4f7f\u5176\u4e2d\u8bb8\u591a\u66f4\u6539\u53ef\u4ee5\u5207\u6362\u3002\u901a\u8fc7\u5207\u6362\uff0c\u60a8\u53ef\u4ee5\u5f3a\u5236\u542f\u7528\u6216\u7981\u7528\u5f00\u53d1\u4eba\u5458\u9009\u9879\u6216adb\u4e2d\u7684\u66f4\u6539\u3002<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/reference\/compat-framework-changes\">\u67e5\u770b\u6b64\u5904\u7684\u8be6\u7ec6\u4fe1\u606f<\/a>\u3002<\/p>\n<div class=\"separator\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-645\" src=\"https:\/\/cdn.oimi.me\/wp-content\/uploads\/2021\/02\/image5.png\" alt=\"\" width=\"1503\" height=\"1999\" \/><\/div>\n<p id=\"imgCaption\"><em>\u5e94\u7528\u7a0b\u5e8f\u517c\u5bb9\u6027\u5728\u5f00\u53d1\u4eba\u5458\u9009\u9879\u4e2d\u5207\u6362\u3002<\/em><\/p>\n<p><strong>\u5e73\u53f0\u7a33\u5b9a\u6027\u91cc\u7a0b\u7891<\/strong>-\u4e0e\u53bb\u5e74\u4e00\u6837\uff0c\u6211\u4eec\u63d0\u524d\u8ba9\u60a8\u4e86\u89e3\u6211\u4eec\u7684\u5e73\u53f0\u7a33\u5b9a\u6027\u91cc\u7a0b\u7891\uff0c\u8ba9\u60a8\u6709\u66f4\u591a\u65f6\u95f4\u8ba1\u5212\u5e94\u7528\u7a0b\u5e8f\u517c\u5bb9\u6027\u5de5\u4f5c\u3002\u5728\u8fd9\u4e2a\u91cc\u7a0b\u7891\u4e0a\uff0c\u6211\u4eec\u4e0d\u4ec5\u5c06\u63d0\u4f9b\u6700\u7ec8\u7684SDK\/NDK API\uff0c\u8fd8\u5c06\u63d0\u4f9b\u6700\u7ec8\u7684\u5185\u90e8API\u548c\u9762\u5411\u5e94\u7528\u7a0b\u5e8f\u7684\u7cfb\u7edf\u884c\u4e3a\u3002\u6211\u4eec\u9884\u8ba1\u57282021\u5e748\u6708\u4e4b\u524d\u8fbe\u5230\u5e73\u53f0\u7a33\u5b9a\u6027\uff0c\u5728\u6b63\u5f0f\u53d1\u5e03\u524d\u51e0\u5468\uff0c\u60a8\u5c06\u8fdb\u884c\u6700\u7ec8\u6d4b\u8bd5\u3002\u53d1\u5e03\u65f6\u95f4\u8868\u7684\u8be6\u7ec6\u4fe1\u606f<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/overview\">\u5728\u8fd9\u91cc<\/a>\u3002<\/p>\n<h1>\u5f00\u59cb\u4f7f\u7528Android 12<\/h1>\n<p>\u5f00\u53d1\u4eba\u5458\u9884\u89c8\u62e5\u6709\u5c1d\u8bd5Android 12\u529f\u80fd\u3001\u6d4b\u8bd5\u5e94\u7528\u7a0b\u5e8f\u548c\u7ed9\u6211\u4eec<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/feedback\">\u53cd\u9988<\/a>\u6240\u9700\u7684\u4e00\u5207\u3002\u60a8\u4eca\u5929\u53ef\u4ee5\u901a\u8fc7<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/download\">\u5c06\u8bbe\u5907\u7cfb\u7edf\u6620\u50cf\u95ea\u5b58<\/a>\u5230<strong>\u50cf\u7d203\/3 XL<\/strong>\u3001<strong>\u50cf\u7d203a\/3a XL<\/strong>\u3001<strong>\u50cf\u7d204\/4 XL<\/strong>\u3001<strong>\u50cf\u7d204a\/4a 5G<\/strong>\u6216<strong>\u50cf\u7d205<\/strong>\u8bbe\u5907\u5f00\u59cb\u3002\u5982\u679c\u60a8\u6ca1\u6709\u50cf\u7d20\u8bbe\u5907\uff0c\u60a8\u53ef\u4ee5\u5728Android Studio\u4e2d\u4f7f\u752864\u4f4d\u7cfb\u7edf\u6620\u50cf\u548cAndroid\u6a21\u62df\u5668\u3002<\/p>\n<p>\u5f53\u60a8<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/setup-sdk\">\u8bbe\u7f6e<\/a>\u65f6\uff0c\u60a8\u5e94\u8be5\u505a\u4ee5\u4e0b\u4e00\u4e9b\u4e8b\u60c5\uff1a<\/p>\n<ul>\n<li><strong>\u5c1d\u8bd5\u65b0\u529f\u80fd\u548cAPI<\/strong>&#8211;<strong>\u5728<\/strong>\u5f00\u53d1\u4eba\u5458\u9884\u89c8\u7684\u65e9\u671f\u9636\u6bb5\uff0c\u60a8\u7684\u53cd\u9988\u81f3\u5173\u91cd\u8981\u3002\u62a5\u544a\u6211\u4eec\u8ddf\u8e2a\u5668\u4e2d\u7684\u95ee\u9898\uff0c\u6216\u901a\u8fc7\u8c03\u67e5\u76f4\u63a5\u53cd\u9988\u6211\u4eec\uff0c\u4ece<a href=\"https:\/\/developer.android.com\/about\/versions\/12\/feedback\">\u53cd\u9988\u548c\u8bf7\u6c42<\/a>\u9875\u9762\u4e2d\u9009\u62e9\u7684\u529f\u80fd\u3002<\/li>\n<li><strong>\u6d4b\u8bd5\u60a8\u5f53\u524d\u5e94\u7528\u7a0b\u5e8f\u7684\u517c\u5bb9\u6027<\/strong>-\u8fd9\u91cc\u7684\u76ee\u6807\u662f\u4e86\u89e3\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u53d7\u5230Android 12\u4e2d\u9ed8\u8ba4\u884c\u4e3a\u66f4\u6539\u7684\u5f71\u54cd\u3002\u53ea\u9700\u5c06\u5f53\u524d\u53d1\u5e03\u7684\u5e94\u7528\u7a0b\u5e8f\u5b89\u88c5\u5230\u8fd0\u884cAndroid 12\u7684\u8bbe\u5907\u6216\u6a21\u62df\u5668\u4e0a\u5e76\u8fdb\u884c\u6d4b\u8bd5\u3002<\/li>\n<li><strong>\u4f7f\u7528\u9009\u62e9\u52a0\u5165\u66f4\u6539\u6d4b\u8bd5\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f <\/strong>&#8211; 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