Android(安卓)Button按钮两个页面切换

页面1.

<?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="用户名"    /><EditText         android:id="@+id/txtUserName"          android:layout_width="fill_parent"         android:layout_height="wrap_content"        android:maxLength = "20"            /> <TextView      android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="密码"    /><EditText         android:id="@+id/txtPass"          android:layout_width="fill_parent"         android:layout_height="wrap_content"          android:maxLength = "20"        android:password = "true"                 /> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent"    android:layout_height="fill_parent"    >         <Button         android:id="@+id/btnSend"          android:layout_width="wrap_content"         android:layout_height="wrap_content"        android:text="登陆"        android:gravity = "center"        android:width = "80px"        />   <Button         android:id="@+id/btnReset"          android:layout_width="wrap_content"         android:layout_height="wrap_content"        android:text="注册"        android:gravity = "center"        android:width = "80px"        /> </LinearLayout></LinearLayout>

页面2

<?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="注册用户名" /> <EditText android:id="@+id/ReUserName" android:layout_width="fill_parent"  android:layout_height="wrap_content" android:maxLength="20" /> <TextView android:layout_width="fill_parent"  android:layout_height="wrap_content" android:text="密码" /> <EditText android:id="@+id/RePass" android:layout_width="fill_parent"  android:layout_height="wrap_content" android:maxLength="20"  android:password="true" /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="fill_parent"    android:layout_height="fill_parent"    >    <Button android:id="@+id/btnReSend" android:layout_width="wrap_content"  android:layout_height="wrap_content" android:text="注册" android:width = "80px"/> <Button android:id="@+id/btnReReset" android:layout_width="wrap_content"  android:layout_height="wrap_content" android:text="取消" android:width = "80px"/></LinearLayout></LinearLayout>

页面1代码

package com.studio.android;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.Intent;public class DemoTest extends Activity { /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        /*监听登陆 */        Login();        /*监听注册*/        Register();    }        public void Login()    {     Button btnsend = (Button)this.findViewById(R.id.btnSend);                final EditText username = (EditText)this.findViewById(R.id.txtUserName);        final EditText pass = (EditText)this.findViewById(R.id.txtPass);                        btnsend.setOnClickListener(new View.OnClickListener() {      @Override   public void onClick(View arg0) {    // TODO Auto-generated method stub    String un = username.getText().toString().trim();    String ps = pass.getText().toString().trim();      if(!"".equals(un)  && !"".equals(ps))    {     Intent intent = new Intent(DemoTest.this,indexmain.class);     intent.putExtra("UserName","您好"+un);     startActivityForResult(intent,1);        }else    {     onCreateDialog();    }   }  });      }    protected Dialog onCreateDialog () {     return new AlertDialog.Builder(DemoTest.this)        .setIcon(android.R.drawable.ic_dialog_info)        .setTitle("错误信息")        .setMessage("用户名密码错误！")        .setPositiveButton("确定",new OnClickListener() {            @Override             public void onClick(DialogInterface arg0, int arg1) {                // 单击确定按钮做的事情。            }                    })        .create();    }    public void Register()    {     Button btnrest =(Button)this.findViewById(R.id.btnReset);        btnrest.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View arg0) {    // TODO Auto-generated method stub    Intent intent = new Intent(DemoTest.this,register.class);    intent.putExtra("store", "from activityMain");    startActivityForResult(intent, 1);    }         });     }}

页面2 代码

package com.studio.android;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class register extends Activity {  /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);         setContentView(R.layout.register);                  Button btnr =(Button)this.findViewById(R.id.btnReReset);         btnr.setOnClickListener(new View.OnClickListener() {        @Override    public void onClick(View arg0) {     // TODO Auto-generated method stub     finish();     }          });           Button btnrest =(Button)this.findViewById(R.id.btnReReset);         btnrest.setOnClickListener(new View.OnClickListener() {        @Override    public void onClick(View arg0) {     // TODO Auto-generated method stub     Intent intent = new Intent(register.this,DemoTest.class);     intent.putExtra("store", "from activityMain");     startActivityForResult(intent, 1);          }          });    }}

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