Android R: updateConfiguration()的relaunch App流程

最新推荐文章于 2025-04-01 13:56:09 发布

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最新推荐文章于 2025-04-01 13:56:09 发布 · 2k 阅读

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本文详细解析了Android系统中updateConfiguration()函数用于切换系统语言更新配置的过程，涉及ActivityManager、ActivityTaskManagerService及ActivityRecord等多个组件的交互。当配置变更时，系统不仅更新全局配置，还可能重新启动活动以匹配新的配置。更新过程包括获取配置、设置用户选择的语言、更新持久化配置，并确保活动与最新配置一致。

updateConfiguration()的relaunch App流程

在这里插入代码片
切换系统语言更新Configuration
frameworks/base/core/java/com/android/internal/app/LocalePicker.java
public static void updateLocales(LocaleList locales) {
   
   
    try {
   
   
        IActivityManager am = ActivityManager.getService();
        Configuration config = am.getConfiguration();
        config.setLocales(locales);
        config.userSetLocale = true;
        am.updatePersistentConfiguration(config);
        BackupManager.dataChanged("com.android.providers.settings");
    } catch (RemoteException var3) {
   
   
    }

} 
->
IActivityTaskManager.aidl
389      /**
390       * Updates global configuration and applies changes to the entire system.
391       * @param values Update values for global configuration. If null is passed it will request the
392       *               Window Manager to compute new config for the default display.
393       * @throws RemoteException
394       * @return Returns true if the configuration was updated.
395       */
396      boolean updateConfiguration(in Configuration values);
->
ActivityTaskManagerService.java
4833      @Override
4834      public boolean updateConfiguration(Configuration values) {
   
   
4835          mAmInternal.enforceCallingPermission(CHANGE_CONFIGURATION, "updateConfiguration()");
4836  
4837          synchronized (mGlobalLock) {