package com.example.editgreeting; import android.app.Activity; Superclass public class MainActivity extends Activity EditText e; TextView t; Button b; protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstancestate); setContentview(R.layout.activity_main); e =(EditText)findViewById(R.id.myEditText); t (Textview)findViewById(R.id.myTextView); b (Button)findViewById(R.id.myButton); Constructor b.setonclickListener(new MyButtonOnclickListener(); class MyButtonOnclickListener implements onclickListener @Override Interface Inner class public void onclick(View v){ /TODO Auto-generated method stub t.setText(e.getText()); 2 Superclass Interface Constructor Inner class