一个Activity中使用两个layout实例

package com.sbs.aas2l;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
 
public class aas2l extends Activity implements OnClickListener {
    /** Called when the activity is first created. */
private String[] data= {"Item-1", "Item-2", "Item-3"};
private Button btn, btn2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.main);
        set_aas2l_layout();
    }
    public void set_aas2l_layout() {
     setContentView(R.layout.aas2l);
     btn = (Button)findViewById(R.id.pu_btn);
     btn.setOnClickListener(this);
     btn2 = (Button)findViewById(R.id.exit_btn);
     btn2.setOnClickListener(this);
    }
    public void onClick(View v){
     if (v == btn) this.set_pu_layout();
     if(v == btn2) this.finish(); }
     public void set_pu_layout(){
     setContentView(R.layout.pickup);
     ListView lv = (ListView)findViewById(R.id.list);
     ArrayAdapter<String> arrayAdapter
     = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data);
     lv.setAdapter(arrayAdapter);
     lv.setOnItemClickListener(listener);
    }
    OnItemClickListener listener= new OnItemClickListener(){
     public void onItemClick(AdapterView arg0, View arg1, int arg2, long arg3){
      set_aas2l_layout();
      TextView tv = (TextView)findViewById(R.id.tv);
      tv.setText("select: " + data[arg2]);
     }
    };
}

step3。编写ass2l.xml (当然也可以在main.xml中写，这次我新建一个。）
 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
 
<TextView android:id= "@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/dialog"
/>
<Button android:id= "@+id/pu_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/pickup"
/>
<Button android:id= "@+id/exit_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/exit"
/>
</LinearLayout>
 
step4。编写pickup.xml(点击select按钮后显示的布局，是一个listview。）
 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World, aas2l"
/>
<ListView android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
 
step5。修改strings.xml
 
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, aas2l!</string>
    <string name="app_name">adroid activity surport 2 layouts</string>
    <string name="pickup">select please</string>
    <string name="exit">Exit</string>
    <string name="dialog">dialog</string>
</resources>
 
step6。运行。
 
如图：
 
初始界面
 
点击select后
 
选择后
 
end 。。。。

step3。编写ass2l.xml (当然也可以在main.xml中写，这次我新建一个。）
 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
 
<TextView android:id= "@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/dialog"
/>
<Button android:id= "@+id/pu_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/pickup"
/>
<Button android:id= "@+id/exit_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="3dip"
android:text="@string/exit"
/>
</LinearLayout>
 
step4。编写pickup.xml(点击select按钮后显示的布局，是一个listview。）
 
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World, aas2l"
/>
<ListView android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
 
step5。修改strings.xml
 
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, aas2l!</string>
    <string name="app_name">adroid activity surport 2 layouts</string>
    <string name="pickup">select please</string>
    <string name="exit">Exit</string>
    <string name="dialog">dialog</string>
</resources>
 
step6。运行。
 
如图：
 
初始界面
 
点击select后
 
选择后
 
end 。。。。