{"id":529,"date":"2023-06-21T20:03:00","date_gmt":"2023-06-21T12:03:00","guid":{"rendered":"https:\/\/www.gzlcy.cn\/?p=529"},"modified":"2023-06-21T20:03:00","modified_gmt":"2023-06-21T12:03:00","slug":"android11-0-%e4%bf%ae%e6%94%b9%e7%b3%bb%e7%bb%9f%e9%bb%98%e8%ae%a4%e5%ad%97%e4%bd%93%e5%a4%a7%e5%b0%8f","status":"publish","type":"post","link":"http:\/\/www.gzlcy.cn\/?p=529","title":{"rendered":"Android11.0 \u4fee\u6539\u7cfb\u7edf\u9ed8\u8ba4\u5b57\u4f53\u5927\u5c0f"},"content":{"rendered":"

\u4ece\u8bbe\u7f6e\u4e2d\u53ef\u4ee5\u770b\u5230\u5b57\u4f53<\/a>\u8bbe\u7f6e\u6709\u56db\u4e2a\u7b49\u7ea7”\u5c0f\uff0c\u9ed8\u8ba4<\/a>\uff0c\u5927\uff0c\u6700\u5927”\uff0c\u4e00\u822c\u90fd\u662f\u4f7f\u7528\u9ed8\u8ba4\u7684\u3002\u6709\u7684\u4ea7\u54c1\u4f7f\u7528\u9ed8\u8ba4\u5b57\u4f53\u4f1a\u663e\u5927\u6216\u8005\u663e\u5c0f\uff0c\u6211\u4eec\u9700\u8981\u6839\u636e\u5b9e\u9645<\/a>\u9700\u6c42\u6765\u4fee\u6539\u3002<\/p>\n

1.\u5b57\u4f53\u5927\u5c0f<\/a>\u8bbe\u7f6e\u76f8\u5173\u5185\u5bb9<\/p>\n

 <<\/span>SwitchPreference<\/span>\n      android:<\/span>key=<\/span>\"peak_refresh_rate\"<\/span>\n      android:<\/span>title=<\/span>\"@string\/peak_refresh_rate_title\"<\/span>\n      android:<\/span>summary=<\/span>\"@string\/peak_refresh_rate_summary\"<\/span>\n      settings:<\/span>controller=<\/span>\"com.android.settings.display.PeakRefreshRatePreferenceController\"<\/span> \/<\/span>><\/span>\n      \n <<\/span>!<\/span>--<\/span> \u5b57\u4f53\u5927\u5c0f\u8bbe\u7f6e --<\/span>><\/span>\n <<\/span>Preference<\/span>\n      android:<\/span>key=<\/span>\"font_size\"<\/span>\n      android:<\/span>title=<\/span>\"@string\/title_font_size\"<\/span>\n      android:<\/span>fragment=<\/span>\"com.android.settings.display.ToggleFontSizePreferenceFragment\"<\/span>\n      settings:<\/span>controller=<\/span>\"com.android.settings.display.FontSizePreferenceController\"<\/span> \/<\/span>><\/span>\n      \n <<\/span>!<\/span>--<\/span> \u663e\u793a\u5927\u5c0f\u8bbe\u7f6e--<\/span>><\/span>\n <<\/span>com.<\/span>android.<\/span>settings.<\/span>display.<\/span><\/span>ScreenZoomPreference<\/span>\n      android:<\/span>key=<\/span>\"display_settings_screen_zoom\"<\/span>\n      android:<\/span>title=<\/span>\"@string\/screen_zoom_title\"<\/span>\n      android:<\/span>fragment=<\/span>\"com.android.settings.display.ScreenZoomSettings\"<\/span>\/<\/span>><\/span>\n<\/code><\/pre>\n<\/p>\n
\u53ef\u4ee5\u770b\u5230\u5b57\u4f53\u8bbe\u7f6e\u663e\u793a\u548c\u63a7\u5236\u76f8\u5173\u7684fragment\u548ccontroller\u3002<\/p>\n
 public<\/span> class<\/span> FontSizePreferenceController<\/span> extends<\/span> BasePreferenceController<\/span> {<\/span>\n    public<\/span> FontSizePreferenceController<\/span>(<\/span>Context<\/span> context,<\/span> String<\/span> key)<\/span> {<\/span>\n        super<\/span>(<\/span>context,<\/span> key)<\/span>;<\/span>\n    }<\/span>\n    @Override<\/span>\n    public<\/span> int<\/span> getAvailabilityStatus<\/span>(<\/span>)<\/span> {<\/span>\n        return<\/span> AVAILABLE;<\/span>\n    }<\/span>\n    @Override<\/span>\n    public<\/span> CharSequence<\/span> getSummary<\/span>(<\/span>)<\/span> {<\/span>\n        final<\/span> float<\/span> currentScale =<\/span> Settings.<\/span>System<\/span>.<\/span>getFloat<\/span>(<\/span>mContext.<\/span>getContentResolver<\/span>(<\/span>)<\/span>,<\/span>\n                Settings.<\/span>System<\/span>.<\/span>FONT_SCALE,<\/span> 1.0f<\/span>)<\/span>;<\/span>\n        final<\/span> Resources<\/span> res =<\/span> mContext.<\/span>getResources<\/span>(<\/span>)<\/span>;<\/span>\n        final<\/span> String<\/span>[<\/span>]<\/span> entries =<\/span> res.<\/span>getStringArray<\/span>(<\/span>R<\/span>.<\/span>array.<\/span>entries_font_size)<\/span>;<\/span>\n        final<\/span> String<\/span>[<\/span>]<\/span> strEntryValues =<\/span> res.<\/span>getStringArray<\/span>(<\/span>R<\/span>.<\/span>array.<\/span>entryvalues_font_size)<\/span>;<\/span>\n        final<\/span> int<\/span> index =<\/span> ToggleFontSizePreferenceFragment<\/span>.<\/span>fontSizeValueToIndex<\/span>(<\/span>currentScale,<\/span>\n                strEntryValues)<\/span>;<\/span>\n        return<\/span> entries[<\/span>index]<\/span>;<\/span>\n    }<\/span>\n }<\/span>\n<\/code><\/pre>\n<\/p>\n
 @Override<\/span>\n public<\/span> void<\/span> onCreate<\/span>(<\/span>@Nullable<\/span> Bundle<\/span> savedInstanceState)<\/span> {<\/span>\n     super<\/span>.<\/span>onCreate<\/span>(<\/span>savedInstanceState)<\/span>;<\/span>\n     final<\/span> Resources<\/span> res =<\/span> getContext<\/span>(<\/span>)<\/span>.<\/span>getResources<\/span>(<\/span>)<\/span>;<\/span>\n     final<\/span> ContentResolver<\/span> resolver =<\/span> getContext<\/span>(<\/span>)<\/span>.<\/span>getContentResolver<\/span>(<\/span>)<\/span>;<\/span>\n     \/\/ Mark the appropriate item in the preferences list.<\/span>\n     mEntries =<\/span> res.<\/span>getStringArray<\/span>(<\/span>R<\/span>.<\/span>array.<\/span>entries_font_size)<\/span>;<\/span>\n     final<\/span> String<\/span>[<\/span>]<\/span> strEntryValues =<\/span> res.<\/span>getStringArray<\/span>(<\/span>R<\/span>.<\/span>array.<\/span>entryvalues_font_size)<\/span>;<\/span>\n     final<\/span> float<\/span> currentScale =<\/span>\n             Settings.<\/span>System<\/span>.<\/span>getFloat<\/span>(<\/span>resolver,<\/span> Settings.<\/span>System<\/span>.<\/span>FONT_SCALE,<\/span> 1.0f<\/span>)<\/span>;<\/span>\n     mInitialIndex =<\/span> fontSizeValueToIndex<\/span>(<\/span>currentScale,<\/span> strEntryValues)<\/span>;<\/span>\n     mValues =<\/span> new<\/span> float<\/span>[<\/span>strEntryValues.<\/span>length]<\/span>;<\/span>\n     for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> strEntryValues.<\/span>length;<\/span> ++<\/span>i)<\/span> {<\/span>\n         mValues[<\/span>i]<\/span> =<\/span> Float<\/span>.<\/span>parseFloat<\/span>(<\/span>strEntryValues[<\/span>i]<\/span>)<\/span>;<\/span>\n     }<\/span>\n     getActivity<\/span>(<\/span>)<\/span>.<\/span>setTitle<\/span>(<\/span>R<\/span>.<\/span>string.<\/span>title_font_size)<\/span>;<\/span>\n }<\/span>\n \n @Override<\/span>\n protected<\/span> Configuration<\/span> createConfig<\/span>(<\/span>Configuration<\/span> origConfig,<\/span> int<\/span> index)<\/span> {<\/span>\n     \/\/ Populate the sample layouts.<\/span>\n     final<\/span> Configuration<\/span> config =<\/span> new<\/span> Configuration<\/span>(<\/span>origConfig)<\/span>;<\/span>\n     config.<\/span>fontScale =<\/span> mValues[<\/span>index]<\/span>;<\/span>\n     return<\/span> config;<\/span>\n }<\/span>\n \/**\n  * Persists the selected font size.\n  *\/<\/span>\n @Override<\/span>\n protected<\/span> void<\/span> commit<\/span>(<\/span>)<\/span> {<\/span>\n     if<\/span> (<\/span>getContext<\/span>(<\/span>)<\/span> ==<\/span> null<\/span>)<\/span> return<\/span>;<\/span>\n     final<\/span> ContentResolver<\/span> resolver =<\/span> getContext<\/span>(<\/span>)<\/span>.<\/span>getContentResolver<\/span>(<\/span>)<\/span>;<\/span>\n     Settings.<\/span>System<\/span>.<\/span>putFloat<\/span>(<\/span>resolver,<\/span> Settings.<\/span>System<\/span>.<\/span>FONT_SCALE,<\/span> mValues[<\/span>mCurrentIndex]<\/span>)<\/span>;<\/span>\n }<\/span>\n<\/code><\/pre>\n<\/p>\n
\u53ef\u4ee5\u770b\u5230\u4ee3\u7801\uff0c\u5b57\u4f53\u8bbe\u7f6e\u4e2d\u663e\u793a\u548c\u8bbe\u7f6e\u90fd\u662f\u64cd\u4f5cSettings.System.FONT_SCALE\u8fd9\u4e2a\u7cfb\u7edf\u5c5e\u6027\u503c\uff0c\u5f53\u4f60\u8bbe\u7f6e\u5b57\u4f53\u5927\u5c0f\u540e\u4f1a\u5148\u6539\u53d8\u8fd9\u4e2a\u5c5e\u6027\u7684\u503c\uff0c\u7136\u540e\u7cfb\u7edf\u76d1\u542c\u5230\u8fd9\u4e2a\u5c5e\u6027\u503c\u53d8\u5316\u4e4b\u540e\u53bb\u6539\u53d8\u6574\u4e2a\u7cfb\u7edf\u5b57\u4f53\u5927\u5c0f\u3002\u5177\u4f53\u7684\u66f4\u65b0\u7cfb\u7edf\u5b57\u4f53\u5927\u5c0f\u7684\u903b\u8f91\u5728ActivityTaskManagerService\u8fd9\u4e2a\u670d\u52a1\u4e2d\u3002<\/p>\n
 private<\/span> final<\/span> class<\/span> FontScaleSettingObserver<\/span> extends<\/span> ContentObserver<\/span> {<\/span>\n     private<\/span> final<\/span> Uri<\/span> mFontScaleUri =<\/span> Settings.<\/span>System<\/span>.<\/span>getUriFor<\/span>(<\/span>FONT_SCALE)<\/span>;<\/span>\n     private<\/span> final<\/span> Uri<\/span> mHideErrorDialogsUri =<\/span> Settings.<\/span>Global<\/span>.<\/span>getUriFor<\/span>(<\/span>HIDE_ERROR_DIALOGS)<\/span>;<\/span>\n     public<\/span> FontScaleSettingObserver<\/span>(<\/span>)<\/span> {<\/span>\n         super<\/span>(<\/span>mH)<\/span>;<\/span>\n         final<\/span> ContentResolver<\/span> resolver =<\/span> mContext.<\/span>getContentResolver<\/span>(<\/span>)<\/span>;<\/span>\n         resolver.<\/span>registerContentObserver<\/span>(<\/span>mFontScaleUri,<\/span> false<\/span>,<\/span> this<\/span>,<\/span> UserHandle<\/span>.<\/span>USER_ALL)<\/span>;<\/span>\n         resolver.<\/span>registerContentObserver<\/span>(<\/span>mHideErrorDialogsUri,<\/span> false<\/span>,<\/span> this<\/span>,<\/span>\n                 UserHandle<\/span>.<\/span>USER_ALL)<\/span>;<\/span>\n     }<\/span>\n        \n     @Override<\/span>\n     public<\/span> void<\/span> onChange<\/span>(<\/span>boolean<\/span> selfChange,<\/span> Collection<\/span><<\/span>Uri<\/span>><\/span><\/span> uris,<\/span> int<\/span> flags,<\/span>\n             @UserIdInt<\/span> int<\/span> userId)<\/span> {<\/span>\n         for<\/span> (<\/span>Uri<\/span> uri :<\/span> uris)<\/span> {<\/span>\n             if<\/span> (<\/span>mFontScaleUri.<\/span>equals<\/span>(<\/span>uri)<\/span>)<\/span> {<\/span>\n                 updateFontScaleIfNeeded<\/span>(<\/span>userId)<\/span>;<\/span>\n             }<\/span> else<\/span> if<\/span> (<\/span>mHideErrorDialogsUri.<\/span>equals<\/span>(<\/span>uri)<\/span>)<\/span> {<\/span>\n                 synchronized<\/span> (<\/span>mGlobalLock)<\/span> {<\/span>\n                     updateShouldShowDialogsLocked<\/span>(<\/span>getGlobalConfiguration<\/span>(<\/span>)<\/span>)<\/span>;<\/span>\n                 }<\/span>\n             }<\/span>\n         }<\/span>\n     }<\/span>\n }<\/span>\n \n .<\/span>.<\/span>.<\/span>\n \n private<\/span> void<\/span> updateFontScaleIfNeeded<\/span>(<\/span>@UserIdInt<\/span> int<\/span> userId)<\/span> {<\/span>\n     final<\/span> float<\/span> scaleFactor =<\/span> Settings.<\/span>System<\/span>.<\/span>getFloatForUser<\/span>(<\/span>mContext.<\/span>getContentResolver<\/span>(<\/span>)<\/span>,<\/span>\n             FONT_SCALE,<\/span> 1.0f<\/span>,<\/span> userId)<\/span>;<\/span>\n     synchronized<\/span> (<\/span>mGlobalLock)<\/span> {<\/span>\n         if<\/span> (<\/span>getGlobalConfiguration<\/span>(<\/span>)<\/span>.<\/span>fontScale ==<\/span> scaleFactor)<\/span> {<\/span>\n             return<\/span>;<\/span>\n         }<\/span>\n         final<\/span> Configuration<\/span> configuration\n                 =<\/span> mWindowManager.<\/span>computeNewConfiguration<\/span>(<\/span>DEFAULT_DISPLAY)<\/span>;<\/span>\n         configuration.<\/span>fontScale =<\/span> scaleFactor;<\/span>\n         updatePersistentConfiguration<\/span>(<\/span>configuration,<\/span> userId)<\/span>;<\/span>\n     }<\/span>\n }<\/span>\n<\/code><\/pre>\n<\/p>\n
\u6240\u4ee5\u6211\u4eec\u60f3\u8981\u8bbe\u7f6e\u9ed8\u8ba4\u5b57\u4f53\u5927\u5c0f\uff0c\u76f4\u63a5\u4fee\u6539Settings.System.FONT_SCALE\u8fd9\u4e2a\u5c5e\u6027\u503c\u3002<\/p>\n
2.\u4fee\u6539\u9ed8\u8ba4\u5b57\u4f53\u5927\u5c0f<\/p>\n
 <<\/span>string-<\/span>array name=<\/span>\"entries_font_size\"<\/span>><\/span>\n     <<\/span>item msgid=<\/span>\"6490061470416867723\"<\/span>><\/span>Small<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item msgid=<\/span>\"3579015730662088893\"<\/span>><\/span>Default<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item msgid=<\/span>\"1678068858001018666\"<\/span>><\/span>Large<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item msgid=<\/span>\"490158884605093126\"<\/span>><\/span>Largest<\/span><<\/span>\/<\/span>item><\/span>\n <<\/span>\/<\/span>string-<\/span>array><\/span>\n <<\/span>string-<\/span>array name=<\/span>\"entryvalues_font_size\"<\/span> translatable=<\/span>\"false\"<\/span>><\/span>\n     <<\/span>item><\/span><\/span>0.85<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item><\/span><\/span>1.0<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item><\/span><\/span>1.15<\/span><<\/span>\/<\/span>item><\/span>\n     <<\/span>item><\/span><\/span>1.30<\/span><<\/span>\/<\/span>item><\/span>\n <<\/span>\/<\/span>string-<\/span>array><\/span>\n<\/code><\/pre>\n<\/p>\n
 private<\/span> void<\/span> loadSystemSettings<\/span>(<\/span>SQLiteDatabase<\/span> db)<\/span> {<\/span>\n     SQLiteStatement<\/span> stmt =<\/span> null<\/span>;<\/span>\n     try<\/span> {<\/span>\n         stmt =<\/span> db.<\/span>compileStatement<\/span>(<\/span>\"INSERT OR IGNORE INTO system(name,value)\"<\/span>\n                 +<\/span> \" VALUES(?,?);\"<\/span>)<\/span>;<\/span>\n         .<\/span>.<\/span>.<\/span>\n         \/\/ add for set default font<\/span>\n         loadFractionSetting<\/span>(<\/span>stmt,<\/span> Settings.<\/span>System<\/span>.<\/span>FONT_SCALE,<\/span>\n                    R<\/span>.<\/span>fraction.<\/span>def_font_size_scale,<\/span> 1<\/span>)<\/span>;<\/span>\n         \/\/ add end           <\/span>\n<\/code><\/pre>\n<\/p>\n
 <<\/span>!<\/span>--<\/span> Default<\/span> font size 0.85<\/span>\/<\/span>1.0<\/span>\/<\/span>1.15<\/span>\/<\/span>1.30<\/span> --<\/span>><\/span>\n <<\/span>fraction name=<\/span>\"def_font_size_scale\"<\/span>><\/span>85<\/span>%<\/span><<\/span>\/<\/span>fraction><\/span>\n<\/code><\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ece\u8bbe\u7f6e\u4e2d\u53ef\u4ee5\u770b\u5230\u5b57\u4f53\u8bbe\u7f6e\u6709\u56db\u4e2a\u7b49\u7ea7<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[1008,494,87,255,91],"_links":{"self":[{"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=\/wp\/v2\/posts\/529"}],"collection":[{"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=529"}],"version-history":[{"count":0,"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=\/wp\/v2\/posts\/529\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=529"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gzlcy.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u4e2a\u6570\u7ec4<\/a>\u662f\u5b57\u4f53\u5927\u5c0f\u8bbe\u7f6e\u7684\u914d\u7f6e\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u8bbe\u7f6e\u7cfb\u7edf\u5b57\u4f53\u9ed8\u8ba4\u6700\u5c0f\uff0c\u6dfb\u52a0\u5982\u4e0b\u914d\u7f6e\uff1a<\/p>\n