Android/Java get value from other class with method

How to pass value from 1 class method to another class activity

public class A extends Activity {
    int value;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        .
        .
        .
        methodA();
    }

    public void methodA() {

        if (condition) {
            value = 1
        } else if (condition) {
            value = 2
        } else {
            value = 3
        }
    }
}
}

public class B extends Activity {
    protected void onCreate(Bundle savedInstanceState) {
        int val;
        super.onCreate(savedInstanceState);
        .
        .
        //how do we can get val = value
    }
}

Question is how can val from class B get the value from class A? Will intent work here?

There are several options to pass values. However passing integer is not best pattern in my private opinion. I used to create class ex. call it ContainerWithData that implements Serializable (may be Parcalable). I would prefer thge first one as it can be used later on by other libraries like Gson for api sending or mappers to convert.

Class Aa extends Activity {

   public initAndRunBeAcitvity(int parameterInt){
      ContainerWithData data = new ContainerWithData();
      data.setIntegerValue(parameterInt);
      runBe(data);
   }

   public void runBe(ContainerWithData data){
      Intent intent = new Intent(Aa.this,Be.class);
      intent.putExtra("MyBeData",data);
      startActivity(intent); 
   }

}

Class Be extends Activity {

   protected void onCreate(Bundle savedInstanceState){
      super.onCreate(savedInstanceState);
      prepareInitParameters();
   }

   private void prepareInitParameters(){
     getInitParameters();
     checkInitParameters();
   }

   private void getInitParameters(){
     ContainerWithData value = getIntent().getSerializableExtra("MyBeData");
     this.value = value;
   }


   private void checkInitParameters(){
      if (value==null){
               //Perform any initialization data, 
               //message or postDelayed closing of activity
       } 
   }


}

Class ContainerWithData implements Serializable {

   @Getter
   @Setter
   private Integer integerValue; 
   //can be null if not setted, 
   //so should be checked by if conditions later on controller of view logic

}

So proposition is to use

getIntent().getSerializableExtra("MyBData");

and

getIntent().getSerializableExtra("MyBData"); together with using model to pass data.

With such pattern many times I had avoid spending more time to add new values as application grows.