Android Walker登录记住密码页面功能实现

package com.example.login;
 
import java.util.ArrayList;
import java.util.List;
 
import com.example.walkersimulate.util.SlideMenu;
 
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;
 
public class MainActivity extends Activity {
 
 private SlideMenu slideMenu;
 private ImageView ivSwitchSlideMenu;
 private Intent intent;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 requestWindowFeature(Window.FEATURE_NO_TITLE);
 setContentView(R.layout.activity_main);
 
 initMenuList();
 slideMenu = (SlideMenu) findViewById(R.id.slideMenu);
 ivSwitchSlideMenu = (ImageView) findViewById(R.id.switch_slidemenu);
 ivSwitchSlideMenu.setOnClickListener(new OnClickListener() {
 
 @Override
 public void onClick(View view) {
 if (slideMenu.isMainScreenShowing()) {// 判断滑动菜单是否已打开，如果未打开
  slideMenu.openMenu(); // 打开滑动菜单
 } else {
  slideMenu.closeMenu();// 关闭滑动菜单
 }
 }
 });
 }
 
 private void initMenuList() {
 /*设置数据源（图片和文本信息）*/
 int[] icons = { R.drawable.icons_menu_login,
 R.drawable.icons_menu_sport, R.drawable.icons_menu_inform,
 R.drawable.icons_menu_history, R.drawable.icons_menu_weather,
 R.drawable.icons_menu_health, R.drawable.icons_menu_setting };
 final String[] introductons = getResources().getStringArray(
 R.array.menulist);
 /*实例列表*/
 List<Item> items = new ArrayList<Item>();
 /*向列表中添加图片和对应的文本信息*/
 for (int i = 0; i < icons.length; i++) {
 items.add(new Item(icons[i], introductons[i]));
 }
 ListView lvMenuList = (ListView) findViewById(R.id.lvMenuList);
 /*创建适配器*/
 itemAdapter adapter = new itemAdapter(this, R.layout.menulist_item,
 items);
 /*配置适配器*/
 lvMenuList.setAdapter(adapter);
 /*列表某一项的点击事件*/
 lvMenuList.setOnItemClickListener(new OnItemClickListener() {
 
 @Override
 public void onItemClick(AdapterView<?> adapterView, View view,
  int position, long id) {
 switch (position) {
 case 0:
  intent=new Intent(MainActivity.this,LoginActivity.class);
  startActivity(intent);
  break;
 
 default:
  break;
 }
 }
 });
 }
}

package com.example.login;
 
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.view.Menu;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.widget.RelativeLayout;
 
public class WelcomeActivity extends Activity {
 
 private Intent intent;
 private SharedPreferences pref;
 private boolean isFirst=true;//用于判断是否是第一次运行，运行后变为false
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_welcome);
 
 RelativeLayout layoutWelcome=(RelativeLayout) findViewById(R.id.layoutwelcome);
 AlphaAnimation alphaAnimation=new AlphaAnimation(0.1f,1.0f);
 alphaAnimation.setDuration(3000);
 layoutWelcome.startAnimation(alphaAnimation);
 alphaAnimation.setAnimationListener(new AnimationListener() {
 @Override
 public void onAnimationStart(Animation animation) {
 }
 @Override
 public void onAnimationRepeat(Animation animation) {
 }
 @Override
 public void onAnimationEnd(Animation animation) {
 judgeIntent();
 }
 private void judgeIntent() {
 pref=getSharedPreferences("isFirst",MODE_PRIVATE);//创建SharedPreferences对象
 isFirst=pref.getBoolean("isFirstIn",true);//如果第一次运行，无isFirstIn值，自动获取第二个参数为默认值
 if(isFirst){//如果为true，进入if语句
  intent=new Intent(WelcomeActivity.this,GiudeActivity.class);
  Editor editor=pref.edit();
  editor.putBoolean("isFirstIn",false);//保存isFirstIn值为false
  editor.commit();//提交数据
 }else{
  intent=new Intent(WelcomeActivity.this,MainActivity.class);//如果为false，说明程序已经运行过，直接跳转到主页面
 }
 startActivity(intent);
 finish();
 }
 });
 }
 
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:background="@drawable/logintop_bg"   
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:paddingBottom="@dimen/activity_horizontal_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_top_margin"
 tools:context=".MainActivity" >  
 
 <EditText
  android:id="@+id/etName"
  android:hint="@string/etName"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_alignParentLeft="true"
  android:layout_alignParentTop="true"
  android:background="@android:drawable/edit_text"  
  android:drawableLeft="@drawable/etaccount"
  android:drawablePadding="25dp"
  android:ems="10" >
  <requestFocus />
 </EditText>
 
 <EditText
  android:id="@+id/etPass"
  android:hint="@string/etPass"
  android:layout_width="match_parent" 
  android:layout_height="wrap_content"
  android:layout_alignLeft="@+id/etName"
  android:layout_below="@+id/etName"
  android:layout_marginTop="10dp"
  android:background="@android:drawable/edit_text"
  android:drawableLeft="@drawable/etpass"
  android:drawablePadding="10dp"
  android:ems="10"  
  android:inputType="textPassword" />
 <CheckBox 
  android:id="@+id/cbSave"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginTop="110dp"
  android:text="记住密码"/>
 
 <LinearLayout         
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_alignLeft="@+id/etPass"
  android:layout_below="@+id/etPass"
  android:layout_marginTop="40dp" >
 
  <Button
   android:id="@+id/btLogin"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:background="@drawable/btchange_bg"
   android:text="@string/btLogin" />
 
  <Button
   android:id="@+id/btRegister"      
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:background="@drawable/btchange_bg"   
   android:text="@string/btRegister"
   android:layout_marginLeft="5dp" />
 </LinearLayout>        
 
</RelativeLayout>

package com.example.login;
 
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
 
public class LoginActivity extends Activity implements OnClickListener{
 
 private EditText etName,etPass;
 private CheckBox cbSave;
 private Button btLogin,btRegister;
 private SharedPreferences pref;
 private Editor editor;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_login);
 
 /*获取控件id*/
 getId();
 /*获取数据*/
 getData();
 /*绑定点击事件*/
 bindClick();
 }
 
 /*获取控件id*/
 private void getId() {
 etName=(EditText) findViewById(R.id.etName);
 etPass=(EditText) findViewById(R.id.etPass);
 cbSave=(CheckBox) findViewById(R.id.cbSave);
 btLogin=(Button) findViewById(R.id.btLogin);
 btRegister=(Button) findViewById(R.id.btRegister);
 }
 
 /*获取数据*/
 private void getData() {
 pref=getSharedPreferences("savaLogin",MODE_PRIVATE);//创建SharedPreferences对象
 editor=pref.edit();//创建SharedPreferences的编辑器
 String userName=pref.getString("userName","");//获取用户名，没有则用空代替
 String userPass=pref.getString("userPass","");
 if(userName.equals("")){//如果为空，代表前一次为选择记住密码，则这次显示记住密码多选框不打勾
 cbSave.setChecked(false);
 }else{
 cbSave.setChecked(true);
 etName.setText(userName);//将获取到的值设置为text
 etPass.setText(userPass);
 }
 }
 
 /*点击事件保存数据*/
 @Override
 public void onClick(View view) {
 switch (view.getId()) {
 case R.id.btLogin:
 String userName=etName.getText().toString().trim();//获取EditText中输入的值，并去掉空格
 String userPass=etPass.getText().toString().trim();
 if("admin".equals(userName)&&"123456".equals(userPass)){
 if(cbSave.isChecked()){
  editor.putString("userName",userName);
  editor.putString("userPass",userPass);
  editor.commit();//提交数据
 }else{//若没有选择记住密码
  editor.remove("userPass");//删除密码
  editor.commit();
 }
 Toast.makeText(LoginActivity.this,"登录成功",Toast.LENGTH_SHORT).show();
 }else{
 Toast.makeText(LoginActivity.this,"用户名或密码错误",Toast.LENGTH_SHORT).show();
 }
 break;
 
 case R.id.btRegister:
 break;
 }
 }
 
 private void bindClick() {
 btLogin.setOnClickListener(this);
 btRegister.setOnClickListener(this);
 }
}