Question

我有一个BroadcastReceiver，它包含以下代码：

package de.my.app;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class BootReceiver extends BroadcastReceiver {


    @Override
    public void onReceive(Context context, Intent intent) {
        Intent alarmIntent = new Intent(context,AlarmService.class);
        PendingIntent pendingIntent = PendingIntent.getService(context, 0, alarmIntent, 0);
        AlarmManager manager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        int interval = 10000;

        manager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), interval, pendingIntent);
        Log.e("RECEIVER", "WORKS");
    }
}

在我的日志中，Receiver的日志消息显示，但来自服务的消息未显示。如果它能正常工作，它会每10秒显示一次。这是我的AlarmService类：

package de.my.app;

import android.app.IntentService;
import android.app.NotificationManager;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class AlarmService extends IntentService {


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

    @Override
    public IBinder onBind(Intent arg0) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        Log.e("SERVICE","WORKS");
    }


    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_STICKY_COMPATIBILITY;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        sendBroadcast(new Intent("restart"));
    }
}

我的清单：

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="de.my.app">
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <permission
        android:name="de.my.app.permission.C2D_MESSAGE"
        android:protectionLevel="signature" />
    <uses-permission android:name="de.my.app.permission.C2D_MESSAGE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MyActivity"
            android:label="@string/app_name"
            android:launchMode="singleTop">
            <intent-filter>
            <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SettingsActivity"
            android:label="Einstellungen">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="de.my.app.MyActivity" />
        </activity>
        <activity
            android:name=".Start"
            android:label="@string/app_name" />

        <receiver
            android:name=".GCMBroadcastReceiver"
            android:permission="com.google.android.c2dm.permission.SEND">
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <category android:name="com.hmkcode.android.gcm" />
            </intent-filter>
        </receiver>

        <service android:name=".GcmIntentService" />

        <receiver
            android:name=".BootReceiver"
            android:enabled="true"
            android:exported="false">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="restart" />

            </intent-filter>
        </receiver>
        <service android:name=".AlarmService" />
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
    </application>


</manifest>

Answer 1

而不是在以下行中使用getBroadcast(...) ...

PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, alarmIntent, 0);

...您应该使用getService(...)。

简单地说 - 如果您希望将PendingIntent用于Activity，Service或Broadcast，则需要使用正确的方法，具体取决于哪种类型它的应用程序组件。

...试

PendingIntent pendingIntent = PendingIntent.getService(context, 0, alarmIntent, 0);

Answer 2

我这样做

//class ScheduledServiceDemoActivity
public class ScheduledServiceDemoActivity extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    PollReceiver.scheduleAlarms(this);

    Toast.makeText(this, R.string.alarms_scheduled, Toast.LENGTH_LONG)
         .show();
    finish();
  }
}



//class PollReceiver
public class PollReceiver extends BroadcastReceiver {
  private static final int PERIOD=30000; // 30sec
  private static final int INITIAL_DELAY=5000; // 5 seconds

  @Override
  public void onReceive(Context ctxt, Intent i) {
    if (i.getAction() == null) {
      WakefulIntentService.sendWakefulWork(ctxt, ScheduledService.class);
    }
    else {
      scheduleAlarms(ctxt);
    }
  }

  static void scheduleAlarms(Context ctxt) {
    AlarmManager mgr=
        (AlarmManager)ctxt.getSystemService(Context.ALARM_SERVICE);
    Intent i=new Intent(ctxt, PollReceiver.class);
    PendingIntent pi=PendingIntent.getBroadcast(ctxt, 0, i, 0);

    mgr.setRepeating(AlarmManager.RTC_WAKEUP,
                     SystemClock.elapsedRealtime() + INITIAL_DELAY,
                     PERIOD, pi);

  }
}

//class  ScheduledService
public class ScheduledService extends WakefulIntentService {


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

  @Override
  protected void doWakefulWork(Intent intent) {

    Log.d(getClass().getSimpleName(), "I ran!"); // will run after 30 sec


  }
}

// mainfest

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name">
        <activity
            android:name="ScheduledServiceDemoActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoDisplay">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>

        <receiver android:name="PollReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
            </intent-filter>
        </receiver>

        <service android:name="ScheduledService">
        </service>
    </application>

AlarmManager无法启动服务

2 个答案: