Android studio 不幸的是，应用程序已停止发送通知时出错

发送通知时，我没有将消息作为通知收到，我的应用程序显示：

不幸的是，应用程序已停止

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在调试过程中，我得到了

message=null

，应用程序给出了错误。

您需要检查消息是否不等于null

import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

import com.google.android.gms.gcm.GcmListenerService;
import com.htl.jsfshoppingfestival.DataBaseHandler;

public class MyGcmListenerService extends GcmListenerService {

    private static final String TAG = "MyGcmListenerService";
    private NotificationManager mNotificationManager;
    Context ctx;
    int countNotification=0;

    public void onMessageReceived(String from, Bundle data) {
        String message = data.getString("Message");
        Log.d(TAG, "From: " + from);
        Log.d(TAG, "Message: " + message);

      //  Toast.makeText(getApplicationContext(), "Notification :"+message, Toast.LENGTH_LONG).show();

      //  Toast.makeText(getApplicationContext(),from+message,Toast.LENGTH_LONG).show();    

        if (from.startsWith("/topics/")) {
            // message received from some topic.
        } else {
            // normal downstream message.
        }

        // [START_EXCLUDE]
        /**
         * Production applications would usually process the message here.
         * Eg: - Syncing with server.
         *     - Store message in local database.
         *     - Update UI.
         */

        /**
         * In some cases it may be useful to show a notification indicating to the user
         * that a message was received.
         */
        sendNotification(message);

        // [END_EXCLUDE]
    }
    // [END receive_message]

    /**
     * Create and show a simple notification containing the received GCM message.
     *
     * @param message GCM message received.
     */
    private void sendNotification(String message) {

        DataBaseHandler db = new DataBaseHandler(this);
        db.addMessage(message);
        countNotification=db.getRowCount();
        db.close();

        Log.d("sender", "Broadcasting message");
        Intent localIntent = new Intent("badge count");
        // You can also include some extra data.
        localIntent.putExtra("Count", countNotification);
        LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);
}
}    

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你在哪个街区得到空值？OnMessageReceived或SendNotification？

OnMessageReceived那么肯定没有任何东西进入

捆绑包

，请检查onec，该链接可能会帮助您调试我得到：->捆绑包[{subtitle=，google.sent_time=1475053305940，msgcnt=1，title=new，振动=1，google.message_id=0:1475053305948338%64ae29a2f9fd7ecd，message=new offers，collapse_key=do_not_collapse，tickerText=}@SiddharthSahni您能正确格式化

包吗。
if(message != null && !message.trim().isEmpty())
{
     sendNotification(message);
}