如何启用和禁用组件？

Question

我最初的问题基本上与此类似：Clearing and setting the default home application

我满意地回答了这个问题，然而，我在答案中难以理解的是你如何在java代码中启用然后禁用清单中的组件？

Answer 1

通过使用包管理器，您可以启用或禁用在menifest文件中声明的组件 禁用组件有两个标志PackageManager.COMPONENT_ENABLED_STATE_DISABLED，启用组件有PackageManager.COMPONENT_ENABLED_STATE_ENABLED标志。

   PackageManager pm  = getApplicationContext().getPackageManager();
   ComponentName componentName = new ComponentName("com.app",
         ".broadcast_receivers.OnNetworkChangedReceiver");
      pm.setComponentEnabledSetting(componentName,
        PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
        PackageManager.DONT_KILL_APP);

Android清单：

<receiver android:name=".broadcast_receivers.OnNetworkChangedReceiver"
            android:enabled="true">
        <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
        </intent-filter>
</receiver>

官方文件：setComponentEnabledSetting

Answer 2

采用Pawan方法实现更通用的实现：

public static void setComponentState(Context context, String packageName , String componentClassName, boolean enabled)
{
    PackageManager pm  = context.getApplicationContext().getPackageManager();
    ComponentName componentName = new ComponentName(packageName, componentClassName);
    int state = enabled ?  PackageManager.COMPONENT_ENABLED_STATE_ENABLED :  PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
    pm.setComponentEnabledSetting(componentName,
            state,
            PackageManager.DONT_KILL_APP);

}