Android 如何在通知单击时打开活动

我使用FCM向用户发送自定义通知，现在我希望当用户单击通知时，活动应该打开

以下是我在mainActivity.java中的代码片段：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("MyNotification", "MyNotification", NotificationManager.IMPORTANCE_DEFAULT);

            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(channel);
        }

下面是我的服务级别：

public class MyMessagingService extends FirebaseMessagingService {
@Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
        showNotification(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody());
    }

    public void showNotification(String title, String message) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentText(message);

        NotificationManagerCompat manager = NotificationManagerCompat.from(this);
        manager.notify(999, builder.build());
    }
}

请告诉我如何做到这一点。 提前谢谢

           // Create an Intent for the activity you want to start
            Intent resultIntent = new Intent(this, ResultActivity.class);
            // Create the TaskStackBuilder and add the intent, which inflates the back stack
            TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
            stackBuilder.addNextIntentWithParentStack(resultIntent);
            // Get the PendingIntent containing the entire back stack
            PendingIntent resultPendingIntent =
                    stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);


            NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID);
            builder.setContentIntent(resultPendingIntent);

            NotificationManagerCompat notificationManager = 
            NotificationManagerCompat.from(this);
            notificationManager.notify(NOTIFICATION_ID, builder.build());

欲了解更多信息，请访问

编辑 这是你想要的代码

public class MyMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
        Intent activityIntent = new Intent(getApplicationContext(), YourActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        showNotification(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody(), pendingIntent);
    }

    public void showNotification(String title, String message, PendingIntent pendingIntent) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message);

        NotificationManagerCompat manager = NotificationManagerCompat.from(this);
        manager.notify(999, builder.build());
    }
}

欲了解更多信息，请访问

编辑 这是你想要的代码

public class MyMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
        Intent activityIntent = new Intent(getApplicationContext(), YourActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        showNotification(remoteMessage.getNotification().getTitle(), remoteMessage.getNotification().getBody(), pendingIntent);
    }

    public void showNotification(String title, String message, PendingIntent pendingIntent) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message);

        NotificationManagerCompat manager = NotificationManagerCompat.from(this);
        manager.notify(999, builder.build());
    }
}

---

对于单击通知并转到特定活动，应使用挂起的意图。如下图所示：

Intent activityIntent = new Intent(getApplicationContext(), SpecificActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

然后使您的通知生成器如下所示

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message); 

因此，最终的

showNotification（）

方法如下所示：

public void showNotification(String title, String message, PendingIntent pendingIntent) {

    Intent activityIntent = new Intent(getApplicationContext(), SpecificActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message);

    NotificationManagerCompat manager = NotificationManagerCompat.from(this);
    manager.notify(999, builder.build());
}

---

如果您有任何不理解的地方或此处有查询注释。

对于单击通知并转到特定活动，您应该使用待定意图。如下图所示：

Intent activityIntent = new Intent(getApplicationContext(), SpecificActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

然后使您的通知生成器如下所示

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message); 

因此，最终的

showNotification（）

方法如下所示：

public void showNotification(String title, String message, PendingIntent pendingIntent) {

    Intent activityIntent = new Intent(getApplicationContext(), SpecificActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this, "MyNotification")
                .setContentTitle(title)
                .setSmallIcon(R.drawable.noti)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentText(message);

    NotificationManagerCompat manager = NotificationManagerCompat.from(this);
    manager.notify(999, builder.build());
}

---

如果您有任何不理解的地方，或者这里有查询注释。

我的意思是我应该在哪里创建挂起的意图，showNotification（）或onMessageReceived（）？您应该在

showNotification（）

方法上创建它请查看我发布的代码。在showNotification中，我必须传递parameter，然后在onMessageReceived中，我调用了showNotification（）方法。对于

挂起的意图

，您不需要传递任何参数。但对于其他人，如您需要

字符串标题，字符串消息

您应该传递此消息。但它显示错误，因为我没有传递参数。我的意思是我应该在哪里创建挂起的意图，showNotification（）或onMessageReceived（）？您应该在

showNotification（）

方法上创建它请查看我发布的代码。在showNotification中，我必须传递parameter，然后在onMessageReceived中，我调用了showNotification（）方法。对于

挂起的意图

，您不需要传递任何参数。但对于其他人，如您需要

字符串标题、字符串消息

，您应该传递此消息。但它显示错误，因为我没有传递参数