AlarmManager從不在AlarmReceiver / BroadcastReceiver中調用onReceive

Question

我仍然無法觸發我的AlarmReceiver類'onReceive方法。 這個實現有什么問題嗎？

所有這一切應該是等待一段時間（最好是6天），然后彈出一個通知。 （你能相信沒有內置系統嗎？crontab任何人！？）

MyActivity和BootReceiver都在必要條件下設置了警報。 AlarmService啟動通知。 並且AlarmReceiver 應該捕獲警報並啟動AlarmService，但它從未捕獲過該廣播，並且不管我做什么都不會。

哦，我一直在測試我的Droid X，2.3.4。 項目是針對API 8構建的。

PS大部分內容改編自http://android-in-practice.googlecode.com/svn/trunk/ch02/DealDroidWithService/

------------ MyActivity.java ------------

public class MyActivity extends Activity implements SensorEventListener {

    private void setupAlarm() {
        Log.i(TAG, "Setting up alarm...");
        AlarmManager alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 1, new Intent(context, AlarmReceiver.class), 0);

        // Get alarm trigger time from prefs
        Log.i(TAG, "Getting alarm trigger time from prefs...");
        SharedPreferences mPrefs2 = PreferenceManager.getDefaultSharedPreferences(context);
        long trigger = SocUtil.getLongFromPrefs(mPrefs2, AlarmConst.PREFS_TRIGGER);
        Log.i(TAG, "Trigger from prefs: " + trigger + " (" + new Date(trigger).toString() + ").");

        // If alarm trigger is not set
        if(trigger == new Long(-1).longValue()) {
            // Set it
            trigger = new Date().getTime() + NOTIFY_DELAY_MILLIS;
            SocUtil.saveLongToPrefs(mPrefs2, AlarmConst.PREFS_TRIGGER, trigger);
            Log.i(TAG, "Trigger changed to: " + trigger + " (" + new Date(trigger).toString() + ").");

            // And schedule the alarm
            alarmMgr.set(AlarmManager.RTC, trigger, pendingIntent);
            Log.i(TAG, "Alarm scheduled.");
        }
        // If it is already set
        else {
            // Nothing to schedule. BootReceiver takes care of rescheduling it after a reboot
        }
    }

}

------------ AlarmService.java ------------

public class AlarmService extends IntentService {

   public AlarmService() {
      super("AlarmService");
   }

   @Override
   public void onHandleIntent(Intent intent) {
      Log.i(AlarmConst.TAG, "AlarmService invoked.");
      this.sendNotification(this);
   }

   private void sendNotification(Context context) {
      Log.i(AlarmConst.TAG, "Sending notification...");
      Intent notificationIntent = new Intent(context, Splash.class);
      PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);

      NotificationManager notificationMgr = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
      Notification notification = new Notification(R.drawable.icon, "Test1", System.currentTimeMillis());
      notification.setLatestEventInfo(context, "Test2", "Test3", contentIntent);
      notificationMgr.notify(0, notification);
   }
}

------------ AlarmReceiver.java ------------

public class AlarmReceiver extends BroadcastReceiver {

   // onReceive must be very quick and not block, so it just fires up a Service
   @Override
   public void onReceive(Context context, Intent intent) {
      Log.i(AlarmConst.TAG, "AlarmReceiver invoked, starting AlarmService in background.");
      context.startService(new Intent(context, AlarmService.class));
   }
}

------------ BootReceiver.java ------------（恢復已擦除的警報，因為我在操作系統中安排的內容不夠重要，無法通過重啟 -_-）

public class BootReceiver extends BroadcastReceiver {

   @Override
   public void onReceive(Context context, Intent intent) {
      Log.i(AlarmConst.TAG, "BootReceiver invoked, configuring AlarmManager...");


      Log.i(AlarmConst.TAG, "Setting up alarm...");
      AlarmManager alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
      PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 1, new Intent(context, AlarmReceiver.class), 0);

      // Get alarm trigger time from prefs
      Log.i(AlarmConst.TAG, "Getting alarm trigger time from prefs...");
      SharedPreferences mPrefs2 = PreferenceManager.getDefaultSharedPreferences(context);
      long trigger = SocUtil.getLongFromPrefs(mPrefs2, AlarmConst.PREFS_TRIGGER);
      Log.i(AlarmConst.TAG, "Trigger from prefs: " + trigger + " (" + new Date(trigger).toString() + ").");

      // If trigger exists in prefs
      if(trigger != new Long(-1).longValue()) {
          alarmMgr.set(AlarmManager.RTC, trigger, pendingIntent);
          Log.i(AlarmConst.TAG, "Alarm scheduled.");
      }
   }
}

------------清單------------

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <activity
        android:name=".MyActivity"
        android:label="@string/app_name" >
    </activity>

<receiver android:name="com.domain.app.BootReceiver">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

<receiver android:name="com.domain.app.AlarmReceiver"></receiver>

    <service android:name="com.domain.app.AlarmService"></service>

Answer 1

以下是我最近用於每小時發出通知的一些代碼（這是我的MainActivity中）：

AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent Notifyintent = new Intent(context, Notify.class);
PendingIntent Notifysender = PendingIntent.getBroadcast(this, 0, Notifyintent, PendingIntent.FLAG_UPDATE_CURRENT);
am.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 3600000, Notifysender);

然后在Notify.java中

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class Notify extends BroadcastReceiver{

    @SuppressWarnings("deprecation")
    @Override
    public void onReceive(Context context, Intent intent) {
          NotificationManager myNotificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
          Notification notification = new Notification(R.drawable.ic_launcher, "Update Device", 0);
          Intent notificationIntent = new Intent(context, MainActivity.class);
          PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
          notification.setLatestEventInfo(context, "Device CheckIn", "Please run Device CheckIn", contentIntent);
          notification.flags |= Notification.FLAG_HIGH_PRIORITY;
          myNotificationManager.notify(0, notification);
    }
}

最后在AndroidManifest.xml中我在標簽之間有這個：

<receiver android:name=".Notify" android:exported="true">
         <intent-filter>
                <action android:name="android.intent.action.NOTIFY" />
            </intent-filter>
</receiver>

我知道我在辦公室工作的主要代碼，隨時向我發送電子郵件以獲得更多幫助，因為我遇到了同樣的問題。

電子郵件：mit.edu的sbrichards

Answer 2

您必須使用intent Action注冊AlarmReceiver。 如下。 並且動作字符串必須與sendBroadcast（）方法廣播的動作相同。

像sendBroadcast(new Intent(""com.intent.action.SOMEACTION.XYZ""));

    <receiver android:name="com.domain.app.AlarmReceiver">

<intent-filter>
                <action android:name="com.intent.action.SOMEACTION.XYZ" />
            </intent-filter>
</receiver>

Answer 3

我甚至沒有使用BroadcastReceiver解決了這個問題。 我讀到的關於如何進行通知警報（也就是A LOT）的每一篇教程和帖子都說使用了BroadcastReceiver ，但顯然我聽不懂東西，或者說這是一堆垃圾。

現在我讓AlarmManager設置一個警報，其中一個Intent直接轉到我創建的新Activity 。 我仍然使用BootReceiver在重啟后重置該警報。

這使得通知可以在應用程序內部，應用程序外進行，應用程序進程被終止，並且在重新啟動后。

感謝您的其他評論者。