AlarmManager和BroadcastReceiver的LocalNotification未在Android O(oreo)中启动

在SDK 26之前,我已经在机器人上运行了本地通知

但是在Android O中我收到了以下警告,广播接收器没有被解雇.

W/BroadcastQueue: Background execution not allowed: receiving Intent { act=package.name.action.LOCAL_NOTIFICATION cat=[com.category.LocalNotification] flg=0x14 (has extras) } to package.name/com.category.localnotifications.LocalNotificationReceiver

从我所看到的广播接收器在Android O中受到更多限制,但如果是这样,即使主要活动没有运行,我应该如何安排广播？

我应该使用服务而不是接收器吗？

这是AlarmManager启动代码：

public void Schedule(String aID, String aTitle, String aBody, int aNotificationCode, long aEpochTime)
{
    Bundle lExtras = new Bundle();
    lExtras.putInt("icon", f.getDefaultIcon());
    lExtras.putString("title", aTitle);
    lExtras.putString("message", aBody);
    lExtras.putString("id", aID);
    lExtras.putInt("requestcode", aNotificationCode);

    Intent lIntent = 
      new Intent(LocalNotificationScheduler.ACTION_NAME)
      .addCategory(NotificationsUtils.LocalNotifCategory)
      .putExtras(lExtras);

    PendingIntent lPendIntent = PendingIntent.getBroadcast(f.getApplicationContext(), aNotificationCode,
                                                           lIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    AlarmManager lAlarmMgr = (AlarmManager) f.getSystemService(Context.ALARM_SERVICE);
    lAlarmMgr.set(AlarmManager.RTC, 1000, lPendIntent);
}

这是接收者代码：

public class LocalNotificationReceiver extends BroadcastReceiver {

public static native void   nativeReceiveLocalNotification (String aID, String aTitle, String aMessage, boolean aOnForeground );

/** This method receives the alarms set by LocalNotificationScheduler,
*   notifies the CAndroidNotifications c++ class, and (if needed) ships a notification banner 
*/
@Override
public void onReceive(Context aContext, Intent aIntent)
{
    Toast.makeText(context, text, duration).show();
}

}

Android清单：

<receiver android:name="com.category.localnotifications.LocalNotificationReceiver">
        <intent-filter>
            <action android:name="${applicationId}.action.LOCAL_NOTIFICATION" />
            <category android:name="com.category.LocalNotification" />
        </intent-filter>
    </receiver>

解决方法:

Android O是迄今为止最新的.因此,我尝试消化并提供尽可能准确的信息.

从https://developer.android.com/about/versions/oreo/background.html#broadcasts起

>针对Android 8.0或更高版本的应用无法再在其清单中为隐式广播注册广播接收器.

>应用程序可以在运行时使用Context.registerReceiver()为任何广播注册接收器,无论是隐式还是显式.

>应用可以继续在其清单中注册显式广播.

此外,在https://developer.android.com/training/scheduling/alarms.html中,示例使用显式广播,并未提及有关Android O的任何特殊内容.

我建议你尝试一下如下的明确广播吗？

public static void startAlarmBroadcastReceiver(Context context, long delay) {
    Intent _intent = new Intent(context, AlarmBroadcastReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, _intent, 0);
    AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
    // Remove any previous pending intent.
    alarmManager.cancel(pendingIntent);
    alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + delay, pendingIntent);        
}

AlarmBroadcastReceiver

public class AlarmBroadcastReceiver extends BroadcastReceiver {


    @Override
    public void onReceive(Context context, Intent intent) {
    }

}

在AndroidManifest中,只需将类定义为

<receiver android:name="org.yccheok.AlarmBroadcastReceiver" >
</receiver>

标签：android-8-0-oreo,android,broadcastreceiver,alarmmanager
来源： https://codeday.me/bug/20190926/1818218.html