<?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:gravity="right" android:layout_gravity="right"
 android:background="@drawable/default_bg" android:orientation="vertical">
 <TableLayout android:layout_width="fill_parent"
 android:layout_height="wrap_content" android:stretchColumns="1">
 <TableRow android:gravity="center" android:layout_gravity="center">
 <ImageView android:layout_width="fill_parent" 
 android:layout_height="wrap_content" android:id="@+id/ivlogo"
 >
 </ImageView>
 </TableRow>
 </TableLayout>
 <TableLayout android:layout_width="fill_parent"
 android:layout_height="wrap_content" android:stretchColumns="1">
 <TableRow android:layout_marginTop="100dip">
 <TextView android:layout_width="wrap_content"
 android:layout_marginLeft="20dip" android:gravity="center_vertical"
 android:layout_height="wrap_content" android:id="@+id/tvaccount"
 android:text="帐号：" android:textSize="20sp">
 </TextView>

 <EditText android:layout_width="70px" android:layout_height="wrap_content"
 android:id="@+id/etaccount" android:layout_marginRight="20dip"
 android:maxLength="20"></EditText>
 </TableRow>
 <TableRow android:layout_marginTop="10dip">
 <TextView android:layout_width="wrap_content"
 android:layout_height="wrap_content" android:id="@+id/tvpw"
 android:layout_marginLeft="20dip" android:gravity="center_vertical"
 android:text="密码：" android:textSize="20sp">
 </TextView>

 <EditText android:layout_width="70px" android:layout_height="wrap_content"
 android:layout_marginRight="20dip" android:id="@+id/etpw"
 android:inputType="textPassword"></EditText>
 </TableRow>
 </TableLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content" android:layout_height="wrap_content"
 android:orientation="horizontal" android:layout_marginTop="5dip" android:layout_marginRight="20dip">
 
 <TextView android:layout_width="wrap_content"
 android:layout_height="wrap_content" android:id="@+id/tvclear"
 android:text="清除Cookies" android:textColor="#aa0000" android:textSize="12px"></TextView>
 
 </LinearLayout>
 <TableLayout android:layout_width="fill_parent"
 android:layout_height="wrap_content" android:layout_marginTop="20dip">
 <TableRow android:gravity="center" android:layout_width="fill_parent">
 <Button android:layout_width="100px" android:layout_height="wrap_content"
 android:id="@+id/btnlogin" android:layout_gravity="center"
 android:text="登录"></Button>

 <Button android:layout_width="100px" android:layout_height="wrap_content"
 android:id="@+id/btnexit" android:layout_gravity="center"
 android:text="退出"></Button>
 </TableRow>
 </TableLayout>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content" android:layout_height="wrap_content"
 android:orientation="horizontal" android:layout_marginTop="25dip">

 <CheckBox android:layout_width="wrap_content"
 android:layout_height="wrap_content" android:id="@+id/cbrp"
 android:text="记住密码" android:textSize="12px"></CheckBox>
 <CheckBox android:layout_width="wrap_content"
 android:layout_height="wrap_content" android:id="@+id/cbal"
 android:text="自动登录" android:textSize="12px"></CheckBox>
 </LinearLayout>
</LinearLayout>

package com.wjq;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.wjq.beans.User;
import com.wjq.func.UserMgr;

public class Login extends Activity {
 private EditText etAccount;
 private EditText etPW;
 private Button btnLogin;
 private Button btnExit;
 private CheckBox cbrp;
 private CheckBox cbal;
 private UserMgr userMgr;
 private User user;
 private SharedPreferences sp;
 private TextView tvClear;

 /*
 * (non-Javadoc)
 * 
 * @see android.app.Activity#onCreate(android.os.Bundle)
 */
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 // TODO Auto-generated method stub
 super.onCreate(savedInstanceState);

 setContentView(R.layout.login);

 etAccount = (EditText) findViewById(R.id.etaccount);
 etPW = (EditText) findViewById(R.id.etpw);
 cbrp = (CheckBox) findViewById(R.id.cbrp);
 cbal = (CheckBox) findViewById(R.id.cbal);
 btnLogin = (Button) findViewById(R.id.btnlogin);
 btnExit = (Button) findViewById(R.id.btnexit);
 tvClear=(TextView)findViewById(R.id.tvclear);

 InitConfig();
 cbrp
 .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

  @Override
  public void onCheckedChanged(CompoundButton buttonView,
  boolean isChecked) {
  sp = getSharedPreferences("UserInfo", 0);
  sp.edit().putBoolean("cbrp", isChecked).commit();
  }

 });

 cbal
 .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

  @Override
  public void onCheckedChanged(CompoundButton buttonView,
  boolean isChecked) {
  sp = getSharedPreferences("UserInfo", 0);
  sp.edit().putBoolean("cbal", isChecked).commit();
  }

 });
 btnLogin.setOnClickListener(new OnClickListener() {

 @Override
 public void onClick(View v) {
 user = new User(etAccount.getText().toString(), etPW.getText()
  .toString());

 Log.i("tag", "Account:" + etAccount.getText().toString());
 Log.i("tag", "Password:" + etPW.getText().toString());

 userMgr = new UserMgr();
 Boolean flag = userMgr.CheckUser(user, Login.this);

 if (!flag) {
  Toast.makeText(Login.this, "用户验证错误！", 1000).show();
 }

 else {
  if (cbrp.isChecked()) {
  sp = getSharedPreferences("UserInfo",
  Context.MODE_WORLD_WRITEABLE
   | Context.MODE_WORLD_READABLE);
  
  sp.edit().putString("account",
  etAccount.getText().toString()).commit();
  sp.edit().putString("password",
  etPW.getText().toString()).commit();
  }
 }
 }

 });

 btnExit.setOnClickListener(new OnClickListener() {

 @Override
 public void onClick(View v) {
 System.exit(0);
 }
 });
 
 tvClear.setOnClickListener(new OnClickListener(){

 @Override
 public void onClick(View v) {sp=getSharedPreferences("UserInfo", 0);
 
 sp.edit().clear().commit();
 }});
 }

 

//初始化配置

 private void InitConfig() {
 sp = getSharedPreferences("UserInfo", 0);
 etAccount.setText(sp.getString("account", null));
 etPW.setText(sp.getString("password", null));
 cbal.setChecked(sp.getBoolean("cbal", false));
 cbrp.setChecked(sp.getBoolean("cbrp", false));
 }
}

 sp = getSharedPreferences("UserInfo", 0);
  sp.edit().putBoolean("cbal", isChecked).commit();
  UserInfo是指xml文件的文件名，如果此文件已存在则直接向其中写内容“isChecked”的值，首先通过SharedPreferences的edit()方法创建editor,然后调用commit()方法提修改

sp = getSharedPreferences("UserInfo", 0);
 etAccount.setText(sp.getString("account", null));
 etPW.setText(sp.getString("password", null));
 cbal.setChecked(sp.getBoolean("cbal", false));
 cbrp.setChecked(sp.getBoolean("cbrp", false));