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如何从应用程序类中注销广播接收器?

android-application-class broadcastreceiver android

Vikramsinh Gaikwad · 技术社区 · 8 年前

我在Android的应用程序类中注册了广播接收器,但现在我的问题是在哪里注销该广播?

public class MyApplication extends Application 

{

@Override
public void onCreate() {
     ..... 
     // OTHER INITIALIZATIONS
     initNetworkBR();
} 
private void initNetworkBR() {

      br = new BroadcastReceiver() {
        ....
      };
      IntentFilter filter = new IntentFilter();
      filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
      registerReceiver(br, filter);
   }
}

6 回复 | 直到 8 年前

Naruto Uzumaki 8 年前

一个建议是在您的启动器活动或所需活动中取消注册,如下所示:

@Override
protected void onDestroy() {
    super.onDestroy();
    ((MyApplication) getApplication()).unregisterReceiver();
}

并实施 unregisterReceiver 中的方法 MyApplication 类别:

public void unregisterReceiver() {
     unregisterReceiver(br);//your broadcast
}

ADM 8 年前

除了在应用程序类中使用广播接收器外,您可以为所有活动使用基类。并在基本活动中注册BR,然后向child提供回调。由于活动具有严格的生命周期模型,因此最好在活动中使用运行时广播接收器,而不是应用程序类。

 public class BaseActivity extends AppCompatActivity {
    @Override
    protected void onResume() {
        super.onResume();
        //registerReceiver Here
    }

    @Override
    protected void onPause() {
        super.onPause();
        //unregisterReceiver here
    }
}

jorjSB 8 年前

您应该在onPause()中使用unregisterReceiver(BroadcastReceiver receiver)来注销广播接收器。

例子:

public class MyActivity extends Activity {
  private final BroadcastReceiver mybroadcast = new SmsBR();

  public void onResume() {
    super.onResume();

    IntentFilter filter = new IntentFilter();
    filter.addAction("android.provider.Telephony.SMS_RECEIVED");
    registerReceiver(mybroadcast, filter);
  }

  public void onPause() {
    super.onPause();

    unregisterReceiver(mybroadcast);
  }
}

Dhruv Patel 8 年前

我认为你应该使用 LocalBroadcastManager 注册和注销接收人,而不是 BroadcastReceiver .

Benefits to use LocalBroadcastManager

@Override
public void onCreate(Bundle savedInstanceState) {

  LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
      new IntentFilter("custom-event-name"));
}

@Override
protected void onDestroy() {
  // Unregister since the activity is about to be closed.
  LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
  super.onDestroy();
}

Samir Bhatt 8 年前

尝试以下代码:
如果您已从Manifiest注册。xml

ComponentName component = new ComponentName(context, MyReceiver.class);

    int status = context.getPackageManager().getComponentEnabledSetting(component);
    if(status == PackageManager.COMPONENT_ENABLED_STATE_ENABLED) {
     context.getPackageManager().setComponentEnabledSetting(component, PackageManager.COMPONENT_ENABLED_STATE_DISABLED , PackageManager.DONT_KILL_APP);
    }

如果以编程方式注册接收器:

@Override
public void onCreate(Bundle savedInstanceState) {

  LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
      new IntentFilter("custom-event-name"));
}

@Override
protected void onDestroy() {
  // Unregister since the activity is about to be closed.
  LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
  super.onDestroy();
}

Esteban Higuita Duarte 4 年前

您实施 Application.ActivityLifecycleCallbacks 接口并在从应用程序类创建时将回调注册为continue:

registerActivityLifecycleCallbacks(<here your typed class with ActivityLifecycleCallbacks>)

然后,您可以完全控制所有活动的生命周期,以执行诸如注销或注册接收器之类的操作。

我希望它能有所帮助