public void save(){
		System.out.println("Im Speicherscreen");
		String json = new Gson().toJson(database);
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
		sharedPrefs.edit().putString("Database", json).apply();
	}






	public void load(){
		System.out.println("Im Ladescreen");
		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
		String json = sharedPrefs.getString("Database","");
		database=new Gson().fromJson(json, Database.class);
		if(database==null)
			database=new Database(); //only when not stored
	}