如何处理收到的信号通知

Question

我想在工具栏图标上设置通知计数标志。我使用onesignal来获取实时通知。因此，每次收到新通知时，我都会将计数保存到sharedPreference并将其显示在工具栏图标上，如下图

如何实现？

所以这里的主要问题是如何处理从一个信号接收到的通知？

这是我的notif count sharedpreference类

public class NotifCountSession {

// Shared Preferences
SharedPreferences pref;

// Editor for Shared preferences
SharedPreferences.Editor editor;

// Context
Context _context;

// Shared pref mode
int PRIVATE_MODE = 0;

// Sharedpreference file name
private static final String PREF_NAME = "notif";

// User name (make variable public to access from outside)
public static final String KEY_COUNT = "count";

// Constructor
public NotifCountSession(Context context){
    this._context = context;
    pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
    editor = pref.edit();
}

public void saveCount(int count){

    // Storing value in pref
    editor.putInt(KEY_COUNT, count);

    editor.commit();
}

public HashMap<String, Integer> getCount(){
    HashMap<String, Integer> notif = new HashMap<>();
    // user name
    notif.put(KEY_COUNT, pref.getInt(KEY_COUNT, 0));

    return notif;
}

public void resetCount(){
    // Clearing all data from Shared Preferences
    editor.clear();
    editor.commit();
}
}

Answer 1

请尝试以下解决方案：

通过上下文初始化有关您活动的一种信号：

   OneSignal.startInit(this)   
   .setNotificationReceivedHandler(new ExampleNotificationReceivedHandler(this))
   .init();

现在，您可以在onesignal类上使用上下文了：

 private Application application;

    public ExampleNotificationReceivedHandler(Application application) {
        this.application = application; //Done now you have a context

    }

Answer 2

根据OneSignal Documentation在您的OneSignal.NotificationReceivedHandler类中实现Notification

然后使用setNotificationReceivedHandler(new NotifCountSession(this))方法（通常是Application类）在其中初始化OneSignal实例，如下所示：

OneSignal.startInit(this)   
   .setNotificationReceivedHandler(new NotifCountSession(this))
   .init();