如何在新活动中获取通知的标题和消息并在文本视图上显示

Question

我是Android的新手。我已经尝试了堆栈溢出链接和其他网站的所有可能方法，但无法做到。

我能够从云消息传递Firebase生成通知。但是现在我想获取通知的标题和消息，并在文本视图或列表视图中显示在"我的购物车活动"上。我尝试了静态，意图和接口方法。但我无法实现它。

这是最后一年的项目演示。下面是我的代码

MyFirebaseInstanceIDService class

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
private static final String TAG = "MyFirebaseIIDService";
@Override
public void onTokenRefresh() {
String refreshedToken = FirebaseInstanceId.getInstance().getToken();
Log.d(TAG, "Refreshed token: " + refreshedToken);
storeToken(refreshedToken);
}
private void storeToken(String token) {
//saving the token on shared preferences
SharedPrefManager.getInstance(getApplicationContext()).saveDeviceToken(token);
}
}

MyFirebase消息服务类

public class MyFirebaseMessagingService extends FirebaseMessagingService {
private static final String TAG = "MyFirebaseMsgService";
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
if (remoteMessage.getData().size() > 0) {
Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());
try {
JSONObject json = new JSONObject(remoteMessage.getData().toString());
sendPushNotification(json);
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
}
}
//this method will display the notification
//We are passing the JSONObject that is received from
//firebase cloud messaging
private void sendPushNotification(JSONObject json) {
//optionally we can display the json into log
Log.e(TAG, "Notification JSON " + json.toString());
try {
//getting the json data
JSONObject data = json.getJSONObject("data");
//parsing json data
String title = data.getString("title");
String message = data.getString("message");
String imageUrl = data.getString("image");
//creating MyNotificationManager object
MyNotificationManager mNotificationManager = new MyNotificationManager(getApplicationContext());
//creating an intent for the notification
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
//if there is no image
if(imageUrl.equals("null")){
//displaying small notification
mNotificationManager.showSmallNotification(title, message, intent);
}else{
//if there is an image
//displaying a big notification
mNotificationManager.showBigNotification(title, message, imageUrl, intent);
}
} catch (JSONException e) {
Log.e(TAG, "Json Exception: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
}
}

下面的我的通知管理器类

public class MyNotificationManager {
public static final int ID_BIG_NOTIFICATION = 234;
public static final int ID_SMALL_NOTIFICATION = 235;
private Context mCtx;
public MyNotificationManager(Context mCtx) {
this.mCtx = mCtx;
}
//the method will show a big notification with an image
//parameters are title for message title, message for message text, url of the big image and an intent that will open
//when you will tap on the notification
public void showBigNotification(String title, String message, String url, Intent intent) {
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
mCtx,
ID_BIG_NOTIFICATION,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
);
NotificationCompat.BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
bigPictureStyle.setBigContentTitle(title);
bigPictureStyle.setSummaryText(Html.fromHtml(message).toString());
bigPictureStyle.bigPicture(getBitmapFromURL(url));
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mCtx);
Notification notification;
notification = mBuilder.setSmallIcon(R.mipmap.ic_launcher).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentIntent(resultPendingIntent)
.setContentTitle(title)
.setStyle(bigPictureStyle)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(mCtx.getResources(), R.mipmap.ic_launcher))
.setContentText(message)
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
NotificationManager notificationManager = (NotificationManager) mCtx.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(ID_BIG_NOTIFICATION, notification);
}
//the method wi
//
//
// +-ll show a small notification
//parameters are title for message title, message for message text and an intent that will open
//when you will tap on the notification
public void showSmallNotification(String title, String message, Intent intent) {
PendingIntent resultPendingIntent =
PendingIntent.getActivity(
mCtx,
ID_SMALL_NOTIFICATION,
intent,
PendingIntent.FLAG_UPDATE_CURRENT
);

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(mCtx);
Notification notification;
notification = mBuilder.setSmallIcon(R.mipmap.ic_launcher).setTicker(title).setWhen(0)
.setAutoCancel(true)
.setContentIntent(resultPendingIntent)
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(mCtx.getResources(), R.mipmap.ic_launcher))
.setContentText(message)
.build();
notification.flags |= Notification.FLAG_AUTO_CANCEL;
NotificationManager notificationManager = (NotificationManager) mCtx.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(ID_SMALL_NOTIFICATION, notification);
}
//The method will return Bitmap from an image URL
private Bitmap getBitmapFromURL(String strURL) {
try {
URL url = new URL(strURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}

Answer 1

您可以使用挂起的意图将值从通知传递到活动，如下所示：

在通知类中：

Intent intent = new Intent(this, YourActivity.class);
intent.putExtra("title",title)
.putExtra("message",message);
//Create a Pending Intent like so:
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT );
//add this line to your mBuilder to set the pending intent
.setContentIntent(pendingIntent); 
}

在您的活动中检查 Extra 是否不为 null 并更新您的文本视图(可以放置在 onCreate() 上)：

bundle = getIntent().getExtras();
if(bundle!=null){
for(String key : bundle.keySet()){
if(key.equals("title"))
textView.setText(bundle.getString(key));
else if (key.equals("message"))
textView2.setText(bundle.getString(key));
}
}

更多信息可以在这里找到