MainActivity.java

package com.example.simplefragmentexample;
 
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
 
public class MainActivity extends FragmentActivity implements OnButtonPressListener{
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    @Override
    public void onButtonPressed(String msg) {
        // TODO Auto-generated method stub
         LayOutTwo Obj=(LayOutTwo) getSupportFragmentManager().findFragmentById(R.id.frag_2);
         Obj.setMessage(msg);
    }
 
}