android - 如何从活动中注销广播接收器

Question

这可能是一个非常简单的问题，但我似乎从一天开始就挂断了这些问题。所以这是一个问题：

如何在从 AndroidManifest 文件注册的 Activity 中取消注册 BroadcastReceiver？这是代码::

 <receiver  android:name=".PhoneCallReceiver">
        <intent-filter  >
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
    </receiver>

我熟悉这个功能

public void unregisterReceiver (BroadcastReceiver 接收器)

但如果未从该 Activity 注册，则会引发异常

IntentFilter filter = new IntentFilter();
filter.addAction("android.intent.action.PHONE_STATE");
registerReceiver(mybroadcast, filter);

Answer 1

要禁用receiver中定义的a manifest，请使用以下命令：

PackageManager pm = context.getPackageManager();
ComponentName component = new ComponentName(context, PhoneCallReceiver.class)
pm.setComponentEnabledSetting(component , PackageManager.COMPONENT_ENABLED_STATE_DISABLED , PackageManager.DONT_KILL_APP);

Answer 2

试试这个：

public void onResume()
  {
    IntentFilter filter = new IntentFilter();
    filter.addAction("android.intent.action.PHONE_STATE");
    registerReceiver(mybroadcast, filter);  

  }

  public void onPause()
  {
    unregisterReceiver(mybroadcast);
  }