学步园

android开发中如果想实现布局页面的跳转可以使用setContentView（）设置跳转到需要的布局文件上面，实现代码如下：

Java代码 

package com.lyj.demo; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
public class setContentViewDemo extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        // 以findViewById()取得Button对象并添加事件onClickLisener 
        Button button1=(Button)findViewById(R.id.bt1); 
        button1.setOnClickListener(new Button.OnClickListener(){ 
            @Override 
            public void onClick(View v) { 
                goToLayout2();     
        }}); 
    } 
    // 将layout由main.xml切换成mylayout.xml 
    public void goToLayout2() { 
           // 将layout改成mylayout 
           setContentView(R.layout.mylayout); 
           Button b2 = (Button) findViewById(R.id.bt2); 
           b2.setOnClickListener(new Button.OnClickListener() { 
               public void onClick(View v) { 
                   goToLayout1(); 
               } 
           }); 
       }  
    // 将layout由mylayout.xml切换成main.xml 
    public void goToLayout1() { 
        setContentView(R.layout.main); 
        Button bt1 = (Button) findViewById(R.id.bt1); 
        bt1.setOnClickListener(new Button.OnClickListener() { 
            public void onClick(View v) { 
                goToLayout2(); 
            } 
        }); 
    }  
} 

主布局main.xml

<?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="欢迎来到小李的博客" 
    /> 
 <Button 
    android:id="@+id/bt1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="点击进入Layout2" 
 /> 
</LinearLayout> 

需要跳转到的布局文件mylayout.xml

<?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" 
    android:background="#ffffffff"  
    > 
<TextView   
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="Welcom to my bog" 
    /> 
 <Button 
    android:id="@+id/bt2" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="点击进入Laout1" 
    /> 
</LinearLayout>