setContentView(转)

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：

package com.lyj.demo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
/**
 *
 * @author lyj
 *  实现不同Layout的转换功能,setContentview()用法；
 */
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();
            }
        });
    }

}

 主布局的mai.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>