Activity到另一个Acivity

res/main.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button 
			android:id="@+id/btn1"
			android:layout_x="118dip" 
			android:text="Button" 
			android:layout_width="wrap_content" 
			android:layout_height="wrap_content"  
			android:layout_y="145dip"></Button>
<TextView 
			android:text="这是第一个Activity" 
			android:layout_width="fill_parent" 
			android:id="@+id/textView1" 
			android:layout_height="wrap_content" 
			android:layout_x="5dip" 
			android:layout_y="92dip"></TextView>
</AbsoluteLayout>

res/ex03_09_01.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
    <TextView android:text="这是第二个Activity" 
    		  android:layout_width="wrap_content" 
    		  android:layout_height="wrap_content" 
    		  android:layout_x="122dip" 
    		  android:layout_y="96dip" 
    		  android:id="@+id/tv2"></TextView>
    <Button android:layout_x="116dip" 
    		android:text="Button" 
    		android:layout_width="wrap_content" 
    		android:layout_height="wrap_content" 
    		android:layout_y="130dip" 
    		android:id="@+id/btn2"></Button>
</AbsoluteLayout>

src/EX03_09.java

package gphone.ex03_09;

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

public class EX03_09 extends Activity {
	Button btn1=null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn1=(Button)findViewById(R.id.btn1);
        btn1.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent intent=new Intent();
				intent.setClass(EX03_09.this,EX03_09_01.class);
				startActivity(intent);
				EX03_09.this.finish();
			}
        	
        });
    }
}

src/EX03_09_01.java

package gphone.ex03_09;

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

public class EX03_09_01 extends Activity{
	Button btn2=null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		this.setContentView(R.layout.ex036_09_01);
		
		btn2=(Button)findViewById(R.id.btn2);
		btn2.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Intent intent=new Intent();
				intent.setClass(EX03_09_01.this,EX03_09.class);
				startActivity(intent);
				EX03_09_01.this.finish();
				
			}
			
		});
		
	}
	
}