单击GCM通知未在Android Kitkat中打开所需的活动

我正在做一个应用程序，它要求我向我的用户发送推送通知

我正在使用。首先，我在通知栏上点击通知时遇到了一个问题，这个问题并没有打开所需的活动，但现在已经解决了。我在应用程序处于活动状态或处于后台时收到通知

然而，我的一部手机（Nexus 4有Android Kitkat 4.4）却出人意料地运行：当应用程序在前台时，它会通过广播显示通知并显示消息，但当点击通知栏上的通知时，它不会启动需要启动的活动。有时它不会像我的其他手机那样接收通知

package com.androidhive.pushnotifications;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.support.v4.app.TaskStackBuilder;
import android.util.Log;
import android.widget.Toast; 
import com.google.android.gcm.GCMBaseIntentService;

import static com.androidhive.pushnotifications.CommonUtilities.SENDER_ID;
import static com.androidhive.pushnotifications.CommonUtilities.displayMessage;
import android.database.sqlite.SQLiteDatabase;

public class GCMIntentService extends GCMBaseIntentService {
private static SQLiteDatabase sampleDB;
private static final String SAMPLE_DB_NAME = "pushData.db";
private static final String SAMPLE_TABLE_NAME = "pushtabledata";
private static final String TAG = "GCMIntentService";
public GCMIntentService() {
    super(SENDER_ID);

}

/**
 * Method called on device registered
 **/
@Override
protected void onRegistered(Context context, String registrationId) {
    Log.i(TAG, "Device registered: regId = " + registrationId);
    displayMessage(context, "Your device registred with GCM");
    Log.d("NAME", MainActivity.name);
    ServerUtilities.register(context, MainActivity.name, MainActivity.email, registrationId);
}

/**
 * Method called on device un registred
 * */
@Override
protected void onUnregistered(Context context, String registrationId) {
    Log.i(TAG, "Device unregistered");
    displayMessage(context, getString(R.string.gcm_unregistered));
    ServerUtilities.unregister(context, registrationId);
}

/**
 * Method called on Receiving a new message
 * */


@Override
protected void onMessage(Context context, Intent intent) {
    Log.i(TAG, "Received message");
    String message = intent.getExtras().getString("price");
     Log.d("GCMIntentService", "here");
     displayMessage(context, message);
    // notifies user
    generateNotification(context, message);
}

/**
 * Method called on receiving a deleted message
 * */
@Override
protected void onDeletedMessages(Context context, int total) {
    Log.i(TAG, "Received deleted messages notification");
    String message = getString(R.string.gcm_deleted, total);
    displayMessage(context, message);
    // notifies user
    generateNotification(context, message);
}

/**
 * Method called on Error
 * */
@Override
public void onError(Context context, String errorId) {
    Log.i(TAG, "Received error: " + errorId);
    displayMessage(context, getString(R.string.gcm_error, errorId));
}

@Override
protected boolean onRecoverableError(Context context, String errorId) {
    // log message
    Log.i(TAG, "Received recoverable error: " + errorId);
    displayMessage(context, getString(R.string.gcm_recoverable_error,
            errorId));
    return super.onRecoverableError(context, errorId);
}

/**
 * Issues a notification to inform the user that server has sent a message.
 */
private static void generateNotification(Context context, String message) {     
    /*NotificationManager  mNotificationManager = (NotificationManager)
              context.getSystemService(Context.NOTIFICATION_SERVICE);

      Intent inty = new Intent(context, MainActivity.class);
      inty.putExtra("message", message);
      PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
              inty, PendingIntent.FLAG_UPDATE_CURRENT);

      NotificationCompat.Builder mBuilder =
              new NotificationCompat.Builder(context)
      .setSmallIcon(R.drawable.ic_launcher)
      .setContentTitle("GCM Notification")
      .setStyle(new NotificationCompat.BigTextStyle()
      .bigText(message))
      .setContentText(message);

      mBuilder.setContentIntent(contentIntent);
      mNotificationManager.notify(0, mBuilder.build());*/
    // Log.d("in GCM Intent", message);
     int icon = R.drawable.ic_launcher;
     long when = System.currentTimeMillis();
     NotificationManager notificationManager = (NotificationManager)
             context.getSystemService(Context.NOTIFICATION_SERVICE);
     Notification notification = new Notification();
     StringBuffer sb = new StringBuffer();
     if(message != null){
        Log.d("in GCM Intent", "not null");
     if(message.contains("@@@@@@@@@@@@"))
     {

         Log.d("in GCM Intent", "got  @");
         String []parts = message.split("@@@@@@@@@@@@");

         Log.d("After : separate", parts[0] + "" + parts[1]);
         sb.append(parts[0]);
         sampleDB= context.openOrCreateDatabase(SAMPLE_DB_NAME, SQLiteDatabase.OPEN_READWRITE, null);
         ContentValues values = new ContentValues();
         values.put("title", parts[0]);
         DateFormat df = new SimpleDateFormat("EEE, d MMM yyyy, HH:mm");
         String date = df.format(Calendar.getInstance().getTime());
         values.put("time", date);
         values.put("message", parts[1]);   
         try{
         sampleDB.beginTransaction();
         sampleDB.insert(SAMPLE_TABLE_NAME, null, values); 
         sampleDB.setTransactionSuccessful();

         }
         catch(Exception e)
         {
             Log.d("Exception",e.toString());
         }
         finally{
             sampleDB.endTransaction();
         }
         sampleDB.close();
     }
     else
     {
         sb.append(message);
     }
     }
     else
     {
         sb.append("No data");
     }
     String title = context.getString(R.string.app_name);
      notification.when = when;
      notification.icon = icon;
     Intent notificationIntent = new Intent(context, MainActivity.class);
     notificationIntent.putExtra("message", message);
     // set intent so it does not start a new activity
     notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
             Intent.FLAG_ACTIVITY_SINGLE_TOP);
     PendingIntent intent =
             PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
     notification.setLatestEventInfo(context, title, sb.toString(), intent);
     notification.flags |= Notification.FLAG_AUTO_CANCEL;

     // Play default notification sound
     notification.defaults |= Notification.DEFAULT_SOUND;

     // Vibrate if vibrate is enabled
     notification.defaults |= Notification.DEFAULT_VIBRATE;
     notificationManager.notify(0, notification);  
}

}

我试着在谷歌上搜索这个问题，发现了一些如下的数据，但这没有任何意义

---

编辑：-我已按要求粘贴了GCMinentService的代码

我也遇到了同样的问题。尝试使用

PendingIntent.getActivity(context, 0, notificationIntent, Intent.FLAG_ACTIVITY_NEW_TASK);` 

代替

PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);

---

这个问题是众所周知的Android Kitkat 4.4和棒棒糖。 请加上：

android:exported="true"

在android manifest中，活动标签应该在点击状态栏中的通知后打开

---

现在，随着Google Play服务的更新，请将Google Play服务库导入到您的项目中，而不是导入gcm.jar。

当您收到通知时，请向我们展示您的gcm类。有人能研究一下我的问题并告诉我我哪里做错了吗？是GCM制造了问题还是意图过滤器和我使用的意图标志制造了问题。无论如何，你可以接受这个答案，因为它确实工作得很好。不知何故，它已经停止工作了。Android Studio中出现编译错误，表示它不是受支持的类型之一。如果您不想为所有其他应用程序导出活动，该怎么办？