Question

我有一个广播接收器，它在Android Applcation类的onCreate（）方法中注册但是如何取消注册相同的

例如

public class MyApplication extends Application {


@Override
public void onCreate() {
    super.onCreate();
    registerReceiver(broadcastReceiver, new IntentFilter("TIMEZONE_CHANGED"));
}

在上面的代码中，我在应用程序onCreate（）方法中注册了它，并且Application类中没有onDestroy（）/ onStop（）方法来取消注册broadcastReceiver。

如何实现

Answer 1

如果您想在应用程序运行的整个过程中收听，则无需取消注册。从文档（截至今天）：

只要注册上下文有效，上下文注册的接收器就会接收广播。例如，如果您在“活动”上下文中注册，则只要活动未被销毁，您就会收到广播。如果您在应用程序上下文中注册，则只要应用程序正在运行，您就会收到广播。

（https://developer.android.com/guide/components/broadcasts.html）

Answer 2

你应该创建一个BaseActivity。

实施例

<div id="container">
  <img src="https://placehold.it/360x360">
  <h1>
    First person's name
  </h1>
  <p>
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque id ex ut nunc pharetra congue. Morbi ut lectus vulputate nunc congue convallis. Nunc ultricies quam ac dolor tincidunt feugiat. Integer condimentum metus leo, a interdum felis molestie in.
    Ut non diam non ligula aliquam iaculis vestibulum quis urna. Maecenas efficitur purus et elementum auctor. Praesent condimentum id sapien vitae tempor. Ut ultrices accumsan lectus, quis ullamcorper velit auctor at. Suspendisse bibendum, odio gravida
    rhoncus pretium, enim elit porta massa, quis sagittis dolor sapien vel nulla. Nullam et enim ac tellus aliquam pulvinar. Proin et bibendum dui.
  </p>
  <img src="https://placehold.it/360x360">
  <h1>
    Second person's name
  </h1>
  <p>
    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque id ex ut nunc pharetra congue. Morbi ut lectus vulputate nunc congue convallis. Nunc ultricies quam ac dolor tincidunt feugiat. Integer condimentum metus leo, a interdum felis molestie in.
    Ut non diam non ligula aliquam iaculis vestibulum quis urna. Maecenas efficitur purus et elementum auctor. Praesent condimentum id sapien vitae tempor. Ut ultrices accumsan lectus, quis ullamcorper velit auctor at. Suspendisse bibendum, odio gravida
    rhoncus pretium, enim elit porta massa, quis sagittis dolor sapien vel nulla. Nullam et enim ac tellus aliquam pulvinar. Proin et bibendum dui.
  </p>
</div>

MainActivity扩展了BaseActivity

示例：

public class BaseActivity extends AppCompatActivity {

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    registerReceiver(broadcastReceiver, new IntentFilter("TIMEZONE_CHANGED"));
}

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

Answer 3

您可以在Application类中调用取消注册接收器，只需要像这样调用

在onDesctroy（）方法调用中的MainActivity中

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

我们在MyApplication类中创建 unregisterReceiver（）方法

 public class MyApplication extends Application {


    @Override
    public void onCreate() {
        super.onCreate();
        registerReceiver(broadcastReceiver, new IntentFilter("TIMEZONE_CHANGED"));
    }

public void unregisterReceiver() {
     unregisterReceiver(broadcastReceiver);
}

Answer 4

从您要取消注册的位置调用

public class MainActivity extends BaseActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}
}

Answer 5

请在您的舱单中使用静态注册的广播接收器，不需要您拨打registerReceiver()和unRegisterReceiver()

<receiver
   android:name=".MyTimeChangeReceiver">
   <intent-filter>
        <action android:name="android.intent.action.TIMEZONE_CHANGED" />
        <action android:name="android.intent.action.TIME_SET" />
    </intent-filter>
</receiver>

在应用程序类中注册和取消注册BroadcastReceiver

5 个答案: