午夜运行服务而不启动应用程序

Question

这是代码

该函数是从MainActivity.onCreate((调用的

 private void setTheTimeToUpdateTables(Context context) {
        Log.i("Update table function","Yes");
        AlarmManager alarmManager=(AlarmManager) getSystemService(ALARM_SERVICE);
        Intent alarmIntent=new Intent(context,UpdateTables.class);
        PendingIntent pendingIntent=PendingIntent.getBroadcast(context,0,alarmIntent,PendingIntent.FLAG_UPDATE_CURRENT);
        alarmManager.cancel(pendingIntent);

        Calendar alarmStartTime = Calendar.getInstance();
        alarmStartTime.set(Calendar.HOUR_OF_DAY, 0);
        alarmStartTime.set(Calendar.MINUTE, 00);
        alarmStartTime.set(Calendar.SECOND, 0);
        alarmManager.set(AlarmManager.RTC_WAKEUP,alarmStartTime.getTimeInMillis(),pendingIntent);
        Log.d("Alarm","Set for midnight");
    }

这是updateTables 的代码

public class UpdateTables extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("Service Start", CalculateDaysService.TAG);
        Log.d("BroadCast Receiver","yes");
        context.startService(new Intent(context,CalculateDaysService.class));
        Log.i("Done","Yes");
    }
}

Manifest.XML

 <receiver android:name=".UpdateTables" android:enabled="true"/>

无法调用updateTable类。

更新：

private void setTheTimeToUpdateTables(上下文上下文(｛

    Log.i("Update table function","Yes");
    AlarmManager alarmManager=(AlarmManager) getSystemService(ALARM_SERVICE);
    Intent alarmIntent=new Intent(context,UpdateTables.class);
    PendingIntent pendingIntent=PendingIntent.getBroadcast(context,0,alarmIntent,PendingIntent.FLAG_UPDATE_CURRENT);
    alarmManager.cancel(pendingIntent);

    Calendar alarmStartTime = Calendar.getInstance();
    alarmStartTime.set(Calendar.HOUR_OF_DAY, 10);
    alarmStartTime.set(Calendar.MINUTE, 29);
    alarmStartTime.set(Calendar.SECOND, 0);
    if (alarmStartTime.get(Calendar.HOUR_OF_DAY) >= 10) {
        alarmStartTime.add(Calendar.DATE, 1);
    }
    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP,alarmStartTime.getTimeInMillis(),100*1000,pendingIntent);
    Log.d("Alarm","Set for midnight");
}

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

Answer 1

更改

 alarmManager.set(AlarmManager.RTC_WAKEUP,alarmStartTime.getTimeInMillis(),pendingIntent);

到

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,alarmStartTime.getTimeInMillis(),pendingIntent);

或

 alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP,alarmStartTime.getTimeInMillis(),pendingIntent);

对于广播接收器，您可以配置AndroidManifest.xml

设置

android:exported = true

请参阅此链接

更新

AndroidManifest.xml

<manifest>标签

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

在您的<application>标签中

  <receiver android:name="com.yourpackage.UpdateTables">  
        <intent-filter>  
            <action android:name="android.intent.action.BOOT_COMPLETED" />  
        </intent-filter>  
    </receiver>