Question

我刚开始使用Android开发。我按照以下指南在Eclipse中创建了一个App Engine连接的Android项目：Creating an App Engine Connected Android Project。

应用程序可以运行，但是当任务进入后台然后通过接收GCM消息再次激活时，GCMIntentService类调用的意图不会到达相应的活动。可能是什么问题？

public class GCMIntentService extends GCMBaseIntentService {

    [...]

    @Override
    public void onMessage(Context context, Intent intent) {
        sendNotificationIntent(context, "Message received via Google Cloud Messaging:\n\n" + intent.getStringExtra("message"), true, false);   
    }

    [...]

    private void sendNotificationIntent(Context context, String message, boolean isError, boolean isRegistrationMessage) {

        Intent notificationIntent = new Intent(context, RegisterActivity.class);
        notificationIntent.putExtra("gcmIntentServiceMessage", true);
        notificationIntent.putExtra("registrationMessage", isRegistrationMessage);
        notificationIntent.putExtra("error", isError);
        notificationIntent.putExtra("message", message);
        notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(notificationIntent);
    }

    [...]
}

提前致谢！

Answer 1

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


         @Override
      public void onMessage(Context context, Intent intent) {
         sendNotificationIntent(context, "Message received via Google Cloud Messaging:\n\n" + intent.getStringExtra("message"), true, false); 
      context.sendBroadcast(intent) ; 
}

   private void sendNotificationIntent(Context context, String message, boolean isError, boolean isRegistrationMessage) {

    Intent notificationIntent = new Intent(context, RegisterActivity.class);
    notificationIntent.putExtra("gcmIntentServiceMessage", true);
    notificationIntent.putExtra("registrationMessage", isRegistrationMessage);
    notificationIntent.putExtra("error", isError);
    notificationIntent.putExtra("message", message);
    notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);


     NotificationManager notificationManager = 
        (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
     Notification notification = neNotification(R.drawable.ic_launcher,"Title",System.currentTimeMillis());

    PendingIntent intents = PendingIntent.getActivity(context, 0, notificationIntent, Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);
    notification.setLatestEventInfo(context , context.getString(R.string.app_name), tickerText , intents );
    notification.flags |= Notification.FLAG_AUTO_CANCEL;
    notificationManager.notify(100, notification);
}

    public class AppBroadcastReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub
    if(intent.getAction() == "AppReceiver") {
       // this intent is gcminit intent and you can get data from this Intent

    }

}

}

   // in menifest file 
      <receiver android:name="AppBroadcastReceiver" >
        <intent-filter>
            <action android:name="AppReceiver" >
            </action>
        </intent-filter>
        </receiver>

Answer 2

如果活动在后台，则意图在onNewIntent中接收，这将在onResume之前调用，因此您必须覆盖onNewIntent

@Override
protected void onNewIntent(Intent intent)
{
    super.onNewIntent(intent);

    boolean b = intent.getBooleanExtra("gcmIntentServiceMessage", false);
    ........  
}

Answer 3

问题几乎解决了......不得不补充：

notificationIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

只剩下一个问题：当GCM消息将活动带到前面时，仍然不会触发onNewIntent（）。我把代码放在onCreate（）中。

从后台激活app后，Android意图出现问题

3 个答案: