Android global variable

Question

How can I create global variable keep remain values around the life cycle of the application regardless which activity running.

Answer 1

Try Like This:

Create a shared data class:

SharedData.java

import android.app.Application;

/**
 * Created by kundan on 6/23/2015.
 */
public class Globals {


    private static Globals instance = new Globals();

    // Getter-Setters
    public static Globals getInstance() {
        return instance;
    }

    public static void setInstance(Globals instance) {
        Globals.instance = instance;
    }

    private String notification_index;


    private Globals() {

    }


    public String getValue() {
        return notification_index;
    }


    public void setValue(String notification_index) {
        this.notification_index = notification_index;
    }



}

Declared/Initiaze an instance of class globally in those classes where you want to set/get data (using this code before onCreate() method):-

Globals sharedData = Globals.getInstance();

Set data:

sharedData.setValue("kundan");

Get data:

String n = sharedData.getValue();