Question

I have two activites called Activity_A and Activity_B. I have a Method or Function in Activity_A like:

public void printNumber (int i) {
    for(int j = 0; j <= i; j++) {
        Log.w("TAG", "Print number is: " + j);
    }
}

Now I want to call this Method from my another activity called Activity_B.

I am trying to call this Method using following lines:

((Activity_A) this.getApplicationContext()).printNumber();

I write this line in onCreate of Activity_B and this will crash my application and logcat shows this error:

java.lang.ClassCastException: android.app.Application cannot be cast to com.example.app.Activity_A

How can I do this?

Edit: I found this question and acording to “Rich” extends Activity_A to Activity_B. But the problem is Activity_B is a list activity and I have already extends this with ListActivity.

and other answer create an instance of Activity_A and then call method. If I do this a all the variable’s become empty or null of Activity_A. And I don’t want to make a static method.

Is there any other way to do this without create a static reference or another instance?

Answer 1

getApplicationContext will give you a class of type Application not Activity. So this wont work, You will have to store a static context of activity and then call this method. If you post details of what you are trying to do then someone will suggest solutions