使用PackageManager.setComponentEnabledSetting（）啓用其他應用程序的BroadcastReceiver（）

Question

我想從我的應用程序啓動安裝在我的android設備上的其他應用程序的BroadcastReceiver。下面是代碼

ComponentName componentName = new ComponentName("com.example.myapp","com.example.myapp.MyBroadcastReceiver"); 
pkgManager.setComponentEnabledSetting(componentName, 
         PackageManager.COMPONENT_ENABLED_STATE_ENABLED, 
         PackageManager.DONT_KILL_APP); 

「com.example.myapp」是含有「MyBroadcastReceiver」

我提到在後Android PackageManager enable any application和Android - can't enable BroadcastReceiver給出答案，但他們都不似乎其他應用程序的包名正在工作。應用程序繼續拋出權限拒絕SecurityException。由於是logcat的

05-24 11:37:38.382: E/AndroidRuntime(8746): java.lang.SecurityException: Permission Denial: attempt to change component state from pid=8746, uid=10042, package uid=10041 

Answer 1

public void setComponentEnabledSetting(ComponentName componentName, 
      int newState, int flags) { 
     setEnabledSetting(componentName.getPackageName(), 
       componentName.getClassName(), newState, flags); 
    } 

public void setApplicationEnabledSetting(String appPackageName, 
      int newState, int flags) { 
     setEnabledSetting(appPackageName, null, newState, flags); 
    } 



private void setEnabledSetting( 
      final String packageName, String className, int newState, final int flags) { 
     if (!(newState == COMPONENT_ENABLED_STATE_DEFAULT 
       || newState == COMPONENT_ENABLED_STATE_ENABLED 
       || newState == COMPONENT_ENABLED_STATE_DISABLED)) { 
      throw new IllegalArgumentException("Invalid new component state: " 
        + newState); 
     } 
     PackageSetting pkgSetting; 
     final int uid = Binder.getCallingUid(); 
     final int permission = mContext.checkCallingPermission( 
       android.Manifest.permission.CHANGE_COMPONENT_ENABLED_STATE); 
     final boolean allowedByPermission = (permission == PackageManager.PERMISSION_GRANTED); 
     boolean sendNow = false; 
     boolean isApp = (className == null); 
     String componentName = isApp ? packageName : className; 
     int packageUid = -1; 
     ArrayList<String> components; 
     synchronized (mPackages) { 
      pkgSetting = mSettings.mPackages.get(packageName); 
      if (pkgSetting == null) { 
       if (className == null) { 
        throw new IllegalArgumentException( 
          "Unknown package: " + packageName); 
       } 
       throw new IllegalArgumentException( 
         "Unknown component: " + packageName 
         + "/" + className); 
      } 
      if (!allowedByPermission && (**uid != pkgSetting.userId**)) { 
       throw new SecurityException( 
         "Permission Denial: attempt to change component state from pid=" 
         + Binder.getCallingPid() 
         + ", uid=" + uid + ", package uid=" + pkgSetting.userId); 
      } 
.... 
} 

它會比較UID，所以不能禁用或啓用其他應用程序。 從：/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java