收到 GCM 消息时如何启动应用程序而不是构建通知？

Question

我刚刚实现了一个 GCM 应用程序，它在 GCM 消息到达时显示通知。消息到达时如何启动应用程序？和振动一样。消息到达时会弹出一个框。

编辑：

非常感谢您的帮助，但我猜你们中的大多数人已经解释过要求用户单击通知才能启动应用程序。我需要在 GCM 消息到达后立即自动启动活动，无论前台是什么应用程序，甚至当应用程序处于后台或 killstate 时。

这是我的 GCMIntentService 代码：

package com.google.android.gcm.demo.app;

import com.google.android.gms.gcm.GoogleCloudMessaging;

import android.app.IntentService;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.SystemClock;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;


public class GCMIntentService extends IntentService {
    public static final int NOTIFICATION_ID = 1;
    private NotificationManager mNotificationManager;
    NotificationCompat.Builder builder;

    public GCMIntentService() {
        super("GcmIntentService");
    }
    public static final String TAG = "GCM Demo";

    @Override
    protected void onHandleIntent(Intent intent) {
        Bundle extras = intent.getExtras();
        GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
        // The getMessageType() intent parameter must be the intent you received
        // in your BroadcastReceiver.
        String messageType = gcm.getMessageType(intent);

        if (!extras.isEmpty()) {  // has effect of unparcelling Bundle
            /*
             * Filter messages based on message type. Since it is likely that GCM will be
             * extended in the future with new message types, just ignore any message types you're
             * not interested in, or that you don't recognize.
             */
            if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)) {
                sendNotification("Send error: " + extras.toString());
            } else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)) {
                sendNotification("Deleted messages on server: " + extras.toString());
                // If it's a regular GCM message, do some work.
            } else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
                // This loop represents the service doing some work.
                for (int i = 0; i < 5; i++) {
                    Log.i(TAG, "Working... " + (i + 1)
                            + "/5 @ " + SystemClock.elapsedRealtime());
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                    }
                }
                Log.i(TAG, "Completed work @ " + SystemClock.elapsedRealtime());
                startActivity(new Intent(getBaseContext(), DemoActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
                Intent myIntent = new Intent(getBaseContext(), DemoActivity.class);
                startActivity(myIntent);
                // Post notification of received message.
                //sendNotification("Received: " + extras.toString());
                Log.i(TAG, "Received: " + extras.toString());
                Toast.makeText(getApplicationContext(), extras.toString(), Toast.LENGTH_LONG).show();
            }
        }
        // Release the wake lock provided by the WakefulBroadcastReceiver.
        GcmBroadcastReceiver.completeWakefulIntent(intent);
    }

    // Put the message into a notification and post it.
    // This is just one simple example of what you might choose to do with
    // a GCM message.

    private void sendNotification(String msg) {
        mNotificationManager = (NotificationManager)
                this.getSystemService(Context.NOTIFICATION_SERVICE);

        PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                new Intent(this, DemoActivity.class), 0);

        NotificationCompat.Builder mBuilder =
                new NotificationCompat.Builder(this)
                        .setSmallIcon(R.drawable.ic_stat_gcm)
                        .setContentTitle("GCM Notification")
                        .setStyle(new NotificationCompat.BigTextStyle()
                                .bigText(msg))
                        .setContentText(msg);
           Toast.makeText(getApplicationContext(),msg,Toast.LENGTH_LONG).show();

        mBuilder.setContentIntent(contentIntent);
        mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
    }
}

Answer 1

通常的做法是通过PendingIntent 将其添加到您的Notification.Builder 或Notification，例如：

PendingIntent intent = PendingIntent.getActivity(context, 0, new Intent(context, HomeActivity.class), 0);
notificationBuilder.setContentIntent(pendingIntent);

要添加弹出框，您可能会看到有用的this 答案

编辑：

刚刚看到您的评论以启动活动，只需在适当的通知到达时致电您的GcmIntentService 中的startActivity();。

Answer 2

你可以用PendingIntent做到这一点

PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, DemoActivity.class), 0);

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
    .setSmallIcon(R.drawable.ic_stat_gcm)
    .setContentTitle("GCM Notification")
    .setStyle(new NotificationCompat.BigTextStyle()
    .bigText(msg))
    .setContentText(msg);

mBuilder.setContentIntent(contentIntent);
mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());

如documentation

如果你愿意，你可以让你的 DemoActivity 类似于对话框或其他东西。

Answer 3

您直接使用包名/类，例如创建一个新意图来调用您将使用 followinglink 文本的 twidroid 程序：

Intent intent = new Intent("com.twidroid.SendTweet");

您可能希望在未安装应用程序时尝试/捕获 ActivityNotFoundException。

Answer 4

在 GcmIntentService 类中添加这个

@Override
        protected void onHandleIntent(Intent intent) {
            Bundle extras = intent.getExtras();
            GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
            // The getMessageType() intent parameter must be the intent you received
            // in your BroadcastReceiver.
            String messageType = gcm.getMessageType(intent);

            if (!extras.isEmpty()) {  // has effect of unparcelling Bundle
                if (GoogleCloudMessaging.
                        MESSAGE_TYPE_SEND_ERROR.equals(messageType)) {
                    sendNotification("Send error: " + extras.toString());
                } else if (GoogleCloudMessaging.
                        MESSAGE_TYPE_DELETED.equals(messageType)) {
                    sendNotification("Deleted messages on server: " +
                            extras.toString());

                } else if (GoogleCloudMessaging.
                        MESSAGE_TYPE_MESSAGE.equals(messageType)) {
                    ** //Start your activity here .This will automatically launch your activity**
                }
            }