如何使Android BroadcastReceiver与AlarmManager一起使用？ [英] How to make Android BroadcastReceiver work with AlarmManager?

问题描述

我具有以下代码来发布意图：

I have the following code to post intents:

        alarmMgr = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent("myLog");
        intent.putExtra("message", new Date().toString());
        alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

        LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
        alarmMgr.setRepeating(AlarmManager.ELAPSED_REALTIME,System.currentTimeMillis()+1000,5000,alarmIntent);

以及以下接收者：

public class myReceiver extends BroadcastReceiver {
    @Override public void onReceive(Context context, Intent intent) {
        // Extract data included in the Intent
        String message = intent.getStringExtra("message");
        logText.setText(logText.getText()+"\n"+message);
    }
}
private BroadcastReceiver mMessageReceiver = new myReceiver();

为什么我的 mMessageReceiver 仅用一次触发 sendBroadcast ，但是没有收到我的 alarmMgr 广播的意图？

Why my mMessageReceiver fires only once with the sendBroadcast, but does not receive the intents broadcasted by my alarmMgr?

编辑：这也是我的 AndroidManifest.xml 文件的相关部分：

Also this is the related part of my AndroidManifest.xml file:

    <receiver android:name=".MainApp$myReceiver" >
        <intent-filter>
            <action android:name="com.example.*.*" />
        </intent-filter>
    </receiver>

编辑2：更多信息：

@Override public void onResume() {
    super.onResume();
    // Register mMessageReceiver to receive messages.
    IntentFilter myIntentFilter = new IntentFilter();
    myIntentFilter.addAction("myLog");
    LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
            myIntentFilter);
}

这将覆盖 MainActivitie s onResume（）。

推荐答案

嗯，我可能不在深度，但这对我有用。因此，在这种情况下，我要在当前时间之前设置一个闹钟（例如10分钟左右）。

Hmm I might be out of my depth here, but this works for me. So in this case, I am setting a alarm (like 10 mins or something) ahead of the current time.

    // Calculate the time when it expires.
    long wakeupTime = System.currentTimeMillis() + duration;

    Intent myIntent = new Intent(MainActivity.this, AlarmReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent,0);

    AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC_WAKEUP, wakeupTime, pendingIntent);

这将设置警报关闭并唤醒我的BroadcastReceiver（AlarmReceiver）。我希望这会有所帮助，而且我在这里也不会错。

This sets an alarm to go off and to wake up my BroadcastReceiver (AlarmReceiver). I hope this helps and I am not way off base here.

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