School Management Java Application class

Global.java

package com.sandftechnologies.schoolmanagementStaff.ModelClasses;

import android.app.Application;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.widget.ArrayAdapter;

import com.facebook.drawee.backends.pipeline.Fresco;
import com.sandftechnologies.schoolmanagementStaff.Activities.ViewStudent;
import com.sandftechnologies.schoolmanagementStaff.DataCache;
import com.sandftechnologies.schoolmanagementStaff.HelperClass.DBHelper;
import com.sandftechnologies.schoolmanagementStaff.Internet.GlobalVariables;

import java.util.Map;

/**
 * Created by PC4 on 5/6/2017.
 */

public class Global extends Application implements GlobalVariables {
    //ClassId,RegDate---, flag=0-->details[Name,id,Roll,attendance[0,1,a,p]]
                                                                                                                                                                //flag=1-->+Atd_Id
    public static ArrayAdapter<String> CategoryAdapter;
    public static int SelectedCategoryPosition;

    public static boolean isStudentLoaded=false;
    public static StudentCompleteModel student;
    public static Map<String,Integer> CategoryMap;
    private static Typeface typeface;
    private static Typeface typefaceBold;

    private static DataCache mDatacache;
    private static String userID,firmID;

    public static String getUserID(){
        return userID;
    }

    public static String getFirmID(){
        return firmID;
    }

    public static StudentCompleteModel getStudent() {
        return student;
    }

    public static void setStudent(StudentCompleteModel student) {
        Global.student = student;
    }

    public static Typeface getTypeface(){
        return typeface;
    }
    public static Typeface getTypefaceBold(){
        return typefaceBold;
    }


    @Override
    public void onCreate() {
        super.onCreate();
        Fresco.initialize(this);
        student=new StudentCompleteModel();

        typeface = Typeface.createFromAsset(getAssets(),  "fonts/Roboto-Light.ttf");
        typefaceBold=Typeface.createFromAsset(getAssets(),  "fonts/Roboto-Regular.ttf");
        DBHelper dbHelper= DBHelper.getInstance(this);
        mDatacache=DataCache.getInstance();
        SharedPreferences shared = getSharedPreferences(Shared_Pref_Name, MODE_PRIVATE);
        userID=shared.getString("userID","");
        firmID=shared.getString("firmID","");

    }


}