null pointer exception on calling interface method implemented in other class

Question

I am trying to call the method getFailureDialog() of the interface OnSelectedListener. The method is implemented in MainActivity.java.

Answer 1

add a method in

public class Common
{
    OnSelectedListener mCallback;

    public void setOnSelectedListener(OnSelectedListener listener){
        mCallback = listener;
    }

    public interface OnSelectedListener 
    {
        public void getFailureDialog();
    }

    public void myRecord(String email)
    {
        mCallback.getFailureDialog();  //null pointer exception here
    }
}

now use the setOnSelectedListener() to initialize your listener

but from you code you might need to implement another listener in your SharedFragment too.