content: package com.example.mediaencodeanddecodedemo;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.Menu;
  import android.view.MenuItem;
  import android.view.View;
  import android.widget.Button;
  
  public class MainActivity extends Activity {
  	
  	private Button btnEncode = null;
  	private Button btnDecode = null;
  
  	@Override
  	protected void onCreate(Bundle savedInstanceState) {
  		super.onCreate(savedInstanceState);
  		setContentView(R.layout.activity_main);
  		
  		initWidgets();
  	}
  	
  	private void initWidgets(){
  		btnEncode = (Button)findViewById(R.id.btnEncode);
  		btnEncode.setOnClickListener(new View.OnClickListener() {
  			
  			@Override
  			public void onClick(View v) {
  				Intent intent = new Intent();
  				intent.setClass(MainActivity.this, EncodeActivity.class);
  				startActivity(intent);
  			}
  		});
  		
  		btnDecode = (Button)findViewById(R.id.btnDecode);
  		btnDecode.setOnClickListener(new View.OnClickListener() {
  			@Override
  			public void onClick(View v) {
  				Intent intent = new Intent();
  				intent.setClass(MainActivity.this, DecodeActivity.class);
  				startActivity(intent);
  			}
  		});
  	}
  }
  