Android12.0 SIM卡语言自适应

需求

要求系统语言跟随SIM卡的语言变化。

语言设定

(1)系统预置语言, 即在makefile中指定的语言
(2)重启, 如果未插卡, 则系统语言为预置的语言
(3)重启插入SIM卡开机, 会自适应为SIM卡的语言
(4)如果有手动设置语言, 以后开机, 不管插入的是哪个国家的卡, 都会显示设置的语言, 不会根据SIM卡自适应变化.

Settings中语言切换流程

当在系统设置中手动设置语言拖拽结束后，会调用updateLocalesWhenAnimationStops(ll)方法

• vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/localepicker/LocaleDragAndDropAdapter.java

	public void updateLocalesWhenAnimationStops(final LocaleList localeList) {
   
        if (localeList.equals(mLocalesToSetNext)) {
   
            return;
        }
 
        // This will only update the Settings application to make things feel more responsive,
        // the system will be updated later, when animation stopped.
        LocaleList.setDefault(localeList);

        mLocalesToSetNext = localeList;
        final RecyclerView.ItemAnimator itemAnimator = mParentView.getItemAnimator();
        itemAnimator.isRunning(new RecyclerView.ItemAnimator.ItemAnimatorFinishedListener() {
   
            @Override
            public void onAnimationsFinished() {
   
                if (mLocalesToSetNext == null || mLocalesToSetNext.equals(mLocalesSetLast)) {
   
                    // All animations finished, but the locale list did not change
                    return;
                }
				// 语言条目发生改变，调用到framework下的LocalePicker进行更新
                LocalePicker.updateLocales(mLocalesToSetNext);
                mLocalesSetLast = mLocalesToSetNext;
                new ShortcutsUpdateTask(mContext).execute();
                mLocalesToSetNext = null;
                mNumberFormatter = NumberFormat.getNumberInstance(Locale.getDefault());
            }
        });
    }

然后调用LocalePicker的updateLocales()方法进行更新

• frameworks/base/core/java/com/android/internal/app/LocalePicker.java

    /**
     * Requests the system to update the list of system locales.
     * Note that the system looks halted for a while during the Locale migration,
     * so the caller need to take care of it.
     */
    @UnsupportedAppUsage
    public static void updateLocales(LocaleList locales) {
   
        if (locales != null) {
   
            locales = removeExcludedLocales(locales);
        }
        // Note: the empty list case is covered by Configuration.setLocales().

        try {
   
            final IActivityManager am = ActivityManager.getService();
            final Configuration config = am.getConfiguration();
            // 切换后的语言信息更新到Configuration
            config.setLocales(locales);
            config.userSetLocale = true; // 手动设置的标志

            am.updatePersistentConfigurationWithAttribution(config,
                    ActivityThread.currentOpPackageName(), null);
            // Trigger the dirty bit for the Settings Provider.
            BackupManager.dataChanged("com.android.providers.settings");
        } catch (RemoteException e) {
   
            // Intentionally left blank
        }
    }

又转入到ActivityManagerService中处理

• frameworks/base/services/core/java/com/android/server/am/ActivityManagerService.java

	@Override
    public void updatePersistentConfigurationWithAttribution(Configuration values,
            String callingPackage, String callingAttributionTag) {
   
        enforceCallingPermission(CHANGE_CONFIGURATION, "updatePersistentConfiguration()");
        enforceWriteSettingsPermission("updatePersistentConfiguration()", callingPackage,
                callingAttributionTag);
        if (values == null) {
   
            throw new NullPointerException("Configuration must not be null");
        }

        int userId = UserHandle.getCallingUserId();
		// 这里的mActivityTaskManager就是ActivityTaskManagerService
        mActivityTaskManager.updatePersistentConfiguration(values, userId);
    }

继续传递到ActivityTaskManagerService中处理updateConfigurationLocked()

• frameworks/base/services/core/java/com/android/server/wm/ActivityTaskManagerService.java

	public void updatePersistentConfiguration(Configuration values, @UserIdInt int userId) {
   
        final long origId =