当注销广播接收器？在的onPause（）的onDestroy（），或的onStop（）？ [英] When to unregister BroadcastReceiver? In onPause(), onDestroy(), or onStop()?

问题描述

当我应该使用unregisterReceiver？在的onPause（），的onDestroy（）或的onStop（）？

请注意：我需要在后台运行的服务。

。

更新：

1. 我得到一个异常释放接收器空。




2. 活动已泄漏的意图接收器是否缺少调用 unregisterReceiver（）;

请告诉我，如果有什么问题，这是我的code：

 私人布尔processedObstacleReceiverStarted;
私人布尔mainNotificationReceiverStarted;保护无效onResume（）{    super.onResume（）;
    尝试{
        registerReceivers（）;    }赶上（例外五）{        Log.e（MatabbatManager.TAG，
                MAINActivity：无法注册接收器Matanbbat行动
                        + e.getMessage（））;
    }
}私人无效registerReceivers（）{    如果（！mainNotificationReceiverStarted）{
        mainNotificationReceiver =新MainNotificationReceiver（）;        IntentFilter的notificationIntent =新的IntentFilter（）;        notificationIntent
                .addAction（MatabbatManager.MATABAT_LOCATION_ACTION）;
        notificationIntent
                .addAction（MatabbatManager.MATABAT_New_DATA_RECEIVED）;
        notificationIntent
                .addAction（MatabbatManager.STATUS_NOTIFCATION_ACTION）;
        registerReceiver（mainNotificationReceiver，notificationIntent）;        mainNotificationReceiverStarted = TRUE;    }    如果（！processedObstacleReceiverStarted）{
        processedObstacleReceiver =新ProcessedObstacleReceiver（）;
        registerReceiver（processedObstacleReceiver，新的IntentFilter（
                MatabbatManager.MATABAT_ALARM_LOCATION_ACTION））;
        processedObstacleReceiverStarted = TRUE;    }}私人无效unRegisterReceivers（）{    如果（mainNotificationReceiverStarted）{
        unregisterReceiver（mainNotificationReceiver）;
        mainNotificationReceiverStarted = FALSE;
    }
    如果（processedObstacleReceiverStarted）{
        unregisterReceiver（processedObstacleReceiver）;
        processedObstacleReceiverStarted = FALSE;
    }}
@覆盖
保护无效的onDestroy（）{
    // TODO自动生成方法存根
    super.onDestroy（）;    尝试{        unRegisterReceivers（）;
        mWakeLock.release（）; //保持屏幕上
    }赶上（例外五）{
        Log.e（MatabbatManager.TAG，的getClass（）+释放receivers-+ e.getMessage（））;
    }}
 

解决方案

这取决于你在哪里有注册的接收器。互补的方法对是

 的onCreate  - 的onDestroy
onResume  - 的onPause
在onStart  - 的onStop
 

如果您注册了第一个接收器，然后注销它在它的结束方式。

When should I use unregisterReceiver? In onPause(), onDestroy(), or onStop()?

Note: I need the service to run in the background.

Update:

1. I get an exception releasing receivers null.

2. Activity has leaked intent receivers are you missing call to unregisterReceiver();

Please tell me if there's something wrong, here's my code:

private boolean processedObstacleReceiverStarted;
private boolean mainNotificationReceiverStarted;

protected void onResume() {

    super.onResume();
    try {
        registerReceivers();

    } catch (Exception e) {

        Log.e(MatabbatManager.TAG,
                "MAINActivity: could not register receiver for Matanbbat Action "
                        + e.getMessage());
    }
}

private void registerReceivers() {

    if (!mainNotificationReceiverStarted) {
        mainNotificationReceiver = new MainNotificationReceiver();

        IntentFilter notificationIntent = new IntentFilter();

        notificationIntent
                .addAction(MatabbatManager.MATABAT_LOCATION_ACTION);
        notificationIntent
                .addAction(MatabbatManager.MATABAT_New_DATA_RECEIVED);
        notificationIntent
                .addAction(MatabbatManager.STATUS_NOTIFCATION_ACTION);
        registerReceiver(mainNotificationReceiver, notificationIntent);

        mainNotificationReceiverStarted = true;

    }

    if (!processedObstacleReceiverStarted) {
        processedObstacleReceiver = new ProcessedObstacleReceiver();
        registerReceiver(processedObstacleReceiver, new IntentFilter(
                MatabbatManager.MATABAT_ALARM_LOCATION_ACTION));
        processedObstacleReceiverStarted = true;

    }

}

private void unRegisterReceivers() {

    if (mainNotificationReceiverStarted) {
        unregisterReceiver(mainNotificationReceiver);
        mainNotificationReceiverStarted = false;
    }
    if (processedObstacleReceiverStarted) {
        unregisterReceiver(processedObstacleReceiver);
        processedObstacleReceiverStarted = false;
    }

}


@Override
protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();

    try {

        unRegisterReceivers();
        mWakeLock.release();//keep screen on
    } catch (Exception e) {
        Log.e(MatabbatManager.TAG, getClass() + " Releasing receivers-" + e.getMessage());
    }

}

解决方案

it depends on where you have register the receiver. The complementary method pairs are

onCreate - onDestroy
onResume - onPause
onStart  - onStop

if you register the receiver in the first one then unregister it in it's ending method.

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