passing object to activity

Question

Can i initialize object in my first activity and you it in all activity???

public class Calc{
    int x;
    int y;
    public Calc(int x, int y) {
       th         


        

Answer 1

Use Application class by extending it and writing your custom Application class, and keep your objects in this class that you need in your cross Activities

class MyApplication extends Application{
    Object a;

    public void setA(Object a){
         this.a = a;
    }

    public Object getA(){
         return a;
    }

}

Now lets suppose in your A activity you create object of class Object and want to use it in your B Activity.

do it this way,

class ActivityA extends Activity(){

...
// some where in activity, set your object this way.
     Object aObj = new Object();
     ((MyApplication)getApplication()).setA(aObj);


...

}

class ActivityB extends Activity(){

...
// some where in activity, get your object this way.
     Object aObj = ((MyApplication)getApplication()).getA( );


...

}

You need to tell your androidManifest.xml about your extended Application class.