Android - My Global Variable values return null after switching Application

Question

I am Using GlobalVariable file to hold data during my entire application, but what happens is it returns null value if i switch to another application and returns back.

below is my code :

In Manifest :

 <application
    ..
    android:name=".MyApplication" >

For Class of global variables :

public class MyApplication extends Application {
public int rowId = 0;
}

inside the activities

int mRowId = ((MyApplication) getApplicationContext()).rowId;

Answer 1

you need to make it static and final but use it with getters and setters only.

Something like the following

 public class MyApplication extends Application {


 public final static int rowId = 0;

dont forget your initializing and setters and getters please :

 int rowId;

public int getRowId() {
    return rowId;
}

public void setRowId(int rowId) {
    this.rowId = rowId;
}

to set the values from outside the class, something like:

  MyApplication.rowId =  //whatever returns int

to get the values from outside/inside the class, something like:

  int TempInt = MyApplication.rowId; // TempInt will have the value of rowId

check What are setters and getters : https://dzone.com/articles/why-should-i-write-getters-and-setters