setImageDrawable(),setImageBackground(), setImageResource()

package com.example.androidsetimage;

import android.os.Bundle;
import android.app.Activity;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  ImageView image1 = (ImageView)findViewById(R.id.image1);
  ImageView image2 = (ImageView)findViewById(R.id.image2);
  ImageView image3 = (ImageView)findViewById(R.id.image3);
  TextView text4 = (TextView)findViewById(R.id.textview4);
  Button button5 = (Button)findViewById(R.id.button5);
  EditText edittext6 = (EditText)findViewById(R.id.edittext6);

  image1.setImageDrawable(getResources().getDrawable(R.drawable.ic_launcher));
  image2.setImageResource(R.drawable.ic_launcher);

  //Requires API 16
  image3.setBackground(getResources().getDrawable(R.drawable.ic_launcher));

  //deprecated
  text4.setBackgroundDrawable(getResources().getDrawable(R.drawable.ic_launcher));

  button5.setBackgroundResource(R.drawable.ic_launcher);

  //Requires API 16
  edittext6.setBackground(getResources().getDrawable(R.drawable.ic_launcher));
 }

}