Question

我想在我的应用中显示下面的快照中的通知：

我已经完成了this个问题和this Github问题。它说你必须将你的数据作为有效载荷发送到GCM服务器，并且当用户点击通知时你可以通过意图在应用程序中访问这些数据。

我发送的信息是：

body: {"to":"\/topics\/global","data":{"LOL":"abc","LOL1":"xyz"},"notification":{"icon":"icon","title":"App Notification Title","body":"qwerty","click_action":"notification_click_action","sound":"default"}}

这是我的GCM侦听器服务代码：

   public class MyGcmListenerService extends GcmListenerService {

    VolleySingleton mVolleySingleton;
    ImageLoader mImageLoader;
    Bitmap bitmap;

    /**
     * Called when message is received.
     *
     * @param from SenderID of the sender.
     * @param data Data bundle containing message data as key/value pairs.
     *             For Set of keys use data.keySet().
     */
    // [START receive_message]

    @Override
    public void onMessageReceived(String from, Bundle data) {

        Log.e("Message Received: ", from);

        String title = data.getString("title");
        System.out.println("Title "+ data.toString());
        String subTitle = data.getString("subTitle");
        String expandTitle = data.getString("expandTitle");
        String imageUrl = data.getString("imageUrl");
        String action = data.getString("action");
        String offerAction = data.getString("offerAction");
        String offerImageUrl = data.getString("offerImageUrl");
        System.out.println(bundleToString(data));

        sendNotification(data);
    }

    @Override
    public void onDeletedMessages() {
//        sendNotification("Deleted messages on server");
    }

    @Override
    public void onMessageSent(String msgId) {
//        sendNotification("Upstream message sent. Id=" + msgId);
    }

    @Override
    public void onSendError(String msgId, String error) {
//        sendNotification("Upstream message send error. Id=" + msgId + ", error" + error);
    }

    private void sendNotification(final Bundle data) {

        if(data.getString("imageUrl") == null){
            sendNotification(data,null);
        } else {
            mVolleySingleton = VolleySingleton.getInstance();

            Handler uiHandler = new Handler(Looper.getMainLooper());
            uiHandler.post(new Runnable() {
                @Override
                public void run() {
                    mImageLoader = mVolleySingleton.getImageLoader();
                    mImageLoader.get(data.getString("imageUrl"), new ImageLoader.ImageListener() {
                        @Override
                        public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {

                            if (response.getBitmap() != null) {
                                bitmap = response.getBitmap();
                                sendNotification(data, bitmap);
                            }
                        }

                        @Override
                        public void onErrorResponse(VolleyError error) {
                            bitmap = null;/*BitmapFactory.decodeResource(getApplicationContext().getResources(),
                            R.mipmap.logo);*/
                        }
                    });
                }
            });

        }
    }

    private void sendNotification(Bundle data,Bitmap bitmap){

        String title = data.getString("title");
        String subTitle = data.getString("subTitle");
        String expandTitle = data.getString("expandTitle");
        String imageUrl = data.getString("imageUrl");
        String action = data.getString("action");
        String offerAction = data.getString("offerAction");
        String offerImageUrl = data.getString("offerImageUrl");
        long defaultId = Long.parseLong(data.getString("Id"));
        long defaulttitleId = Long.parseLong(data.getString("titleId"));
        long defaultTagId = Long.parseLong(data.getString("tagId"));

        Log.d("Test321", "in MyGcmListenerService Id = " + defaultId + " PtitleId = " +
                defaulttitleId + " TagId = " + defaultTagId);

        int smallIconDrawable;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
            smallIconDrawable = R.mipmap.logo;
        } else {
            smallIconDrawable = R.mipmap.logo;
        }
        Intent intent;
        Bundle bundle = new Bundle();

        if(defaultId != 0 && defaulttitleId != 0 ){
            Log.d("Test123","Push to 2page");
            intent = new Intent(this, DetailActivity.class);
            bundle.putLong(KEY_ID,defaultId);
            bundle.putLong(KEY_TITLE_ID, defaulttitleId);
            bundle.putLong(KEY_TAGID, defaultTagId);
            bundle.putLong("pushnotification",1);
            intent.putExtras(bundle);
        } else {
            Log.d("Test123","push to mainactivity");
            intent = new Intent(this, MainActivity.class);
        }
        intent.putExtra("pushnotification",action);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
                PendingIntent.FLAG_ONE_SHOT);
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(smallIconDrawable)
                .setLargeIcon(BitmapFactory.decodeResource(getApplication().getResources(),R.mipmap.logo))
                .setContentTitle(title)
                .setContentText(subTitle)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);
        if(bitmap != null){
            notificationBuilder.setStyle(new NotificationCompat.BigPictureStyle().bigPicture(bitmap));
        }else{
            notificationBuilder.setStyle(new NotificationCompat.BigTextStyle().bigText(expandTitle));
        }
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());

    }

    public static String bundleToString(Bundle bundle) {
        if (bundle == null) {
            return null;
        }
        String string = "Bundle{";
        for (String key : bundle.keySet()) {
            string += " " + key + " => " + bundle.get(key) + ";";
        }
        string += " }Bundle";
        return string;
    }
}

消息已成功接收，显示通知但不完全符合我的要求，因为未调用onMessageReceived()。只有当用户点击GCM在我的Activity中发送的默认通知时，我才能获得我作为键值对传递的数据。我看过很多应用程序显示自定义通知。那么，必须有一些方法来实现这种通知吗？任何帮助表示赞赏。

Answer 1

由于您的有效负载中包含notification标记，因此无法调用

onMessageReceived。

如果您想拥有自己的通知，则需要将其删除，只需在有效负载中发送数据即可。执行此操作时，将调用onMessageReceived，然后您必须使用Notification.Builder类创建自己的通知。

如果您想要除构建器之外的其他内容，可以通过阅读this

创建自己的通知

如何显示GCM推送通知的自定义UI？

1 个答案: