接收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。当消息到达时，如何启动应用程序？和viber一样。当消息到达时，你得到一个弹出框。

编辑:

非常感谢您的帮助，但我想你们大多数人都解释过需要用户单击通知才能启动应用程序。无论前台是什么应用程序，甚至当应用程序处于后台或基态时，我都需要在GCM消息到达后立即自动启动活动。

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

您可以直接使用包名称/类，例如，创建一个新的意图来调用twidroid程序，您将使用以下链接文本：

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

您可能希望在未安装应用程序时对ActiveNotFoundException进行尝试/捕获。

Answer 2

您可以使用pendingent

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());

如在文档中

如果你愿意，你可以把你的< code>DemoActivity做成对话框的样子或者别的什么。

Answer 3

做这件事的通常方法是通过PendingIntent将其添加到您的Notification.Builder或通知例如：

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

要添加弹出框，您可能会看到此答案的帮助

编辑：

刚刚看到您的评论以便启动活动，当适当的通知到达时，请在您的GcmIntentService中调用start active（）；。