1.java

/**
 * 
 */
package com.itest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

/**
 * @author Robin
 */
public class ITestP3Activity extends Activity {
	Button b1;
	View v1;

	/** Called when the activity is first created. */
	@Override
	public void onCreate( Bundle savedInstanceState )
	{
		super.onCreate( savedInstanceState );
		//快取View1
		v1 = getLayoutInflater().inflate( R.layout.p31, null );
		//動態修改v1中內容
		b1 = (Button) v1.findViewById( R.id.button1 );
		b1.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick( View v )
			{
				Intent in = new Intent();
				in.setClassName( getApplicationContext(), "com.itest.ITestP4Activity" );
				startActivity( in );
			}
		} );
		//切換到v1
		setContentView( v1 );
	}
	
}
 

2.java

/**
 * 
 */
package com.itest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

/**
 * @author Robin
 */
public class ITestP4Activity extends Activity {
	Button b1;
	View v1;

	/** Called when the activity is first created. */
	@Override
	public void onCreate( Bundle savedInstanceState )
	{
		super.onCreate( savedInstanceState );
		//快取View1
		v1 = getLayoutInflater().inflate( R.layout.p41, null );
		//動態修改v1中內容
		b1 = (Button) v1.findViewById( R.id.button1 );
		b1.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick( View v )
			{
				Intent in = new Intent();
				in.setClassName( getApplicationContext(), "com.itest.ITestP3Activity" );
				startActivity( in );
			}
		} );
		//切換到v1
		setContentView( v1 );
	}
	
}
 

要注意的是每次的切換，都是新啟動的Activity程式，可以通過下面的程式碼測試一下

/**
 * 
 */
package com.itest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

/**
 * @author Robin
 */
public class ITestP3Activity extends Activity {
	Button b1;
	Button b2;
	View v1;
	TextView tv1;

	/** Called when the activity is first created. */
	@Override
	public void onCreate( Bundle savedInstanceState )
	{
		super.onCreate( savedInstanceState );
		//快取View1
		v1 = getLayoutInflater().inflate( R.layout.p31, null );
		//動態修改v1中內容
		b1 = (Button) v1.findViewById( R.id.button1 );
		b1.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick( View v )
			{
				Intent in = new Intent();
				in.setClassName( getApplicationContext(), "com.itest.ITestP4Activity" );
				startActivity( in );
			}
		} );

		tv1 = (TextView) v1.findViewById( R.id.textView1 );
		
		b2 = (Button) v1.findViewById( R.id.button2 );
		b2.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick( View v )
			{
				tv1.setText( System.currentTimeMillis()+"" );
				// TODO Auto-generated method stub
			}
		});
		//切換到v1
		setContentView( v1 );
	}
	
}
 

然後按系統的返回鍵，會一頁一頁的返回上一頁（可以返回到有數字的一頁），從而說明每次的切換，都是新啟動的Activity程式