Android--页面跳转

1.页面一main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/text1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/layout1"/>

    <Button
        android:id="@+id/btn1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Go to Layout2" />

</LinearLayout>

页面二mylayout.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/text2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/layout2"/>

    <Button
        android:id="@+id/btn2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Go to Layout1" />

</LinearLayout>

2.java程序如下：

package org.lxh.demo;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hello extends Activity {
	private Button btn1 = null;

	// private Button btn2=null;
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState); // 生命周期方法
		super.setContentView(R.layout.main); // 设置要使用的布局管理器
		this.btn1 = (Button) super.findViewById(R.id.btn1);
		btn1.setOnClickListener(new Button.OnClickListener() {

			public void onClick(View arg0) {
				jumpToLayout2();

			}

		});
	}

	public void jumpToLayout2() {
		setContentView(R.layout.mylayout);
		Button btn2 = (Button) super.findViewById(R.id.btn2);
		btn2.setOnClickListener(new Button.OnClickListener() {

			public void onClick(View arg0) {
				jumpToLayout1();

			}

		});

	}

	public void jumpToLayout1() {
		setContentView(R.layout.main);
		Button btn1 = (Button) super.findViewById(R.id.btn1);
		btn1.setOnClickListener(new Button.OnClickListener() {

			public void onClick(View arg0) {
				jumpToLayout2();

			}

		});
	}

}

3.运行如下：