Android Button按钮两个页面切换

页面1.

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<?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 

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<?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

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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

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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);             }          });     } }