Android SharedPreferences实现记住密码和自动登录

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 android:background="@drawable/bj"
 tools:context="com.example.application.MainActivity">
 <ImageView
  android:layout_marginTop="50dp"
  android:layout_width="100dp"
  android:layout_height="100dp"
  android:src="@drawable/login_tx_1"
  android:layout_gravity="center"
  />
 <FrameLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content">
  <EditText
   android:layout_width="300dp"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:focusable="true"
   android:focusableInTouchMode="true"
   android:clickable="true"
   android:hint="请输入账号"
   android:gravity="center"
   android:paddingRight="100dp"
   android:id="@+id/login_uname"
   />
  <TextView
   android:layout_width="38dp"
   android:layout_height="33dp"
   android:layout_marginLeft="30dp"
   android:padding="6dp"
   android:gravity="center"
   android:drawableLeft="@drawable/uname"
   />
 </FrameLayout>
 <FrameLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content">
  <EditText
   android:layout_width="300dp"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:focusable="true"
   android:focusableInTouchMode="true"
   android:clickable="true"
   android:hint="请输入密码"
   android:gravity="center"
   android:paddingRight="100dp"
   android:password="true"
   android:id="@+id/login_upass"
   />
  <TextView
   android:layout_width="38dp"
   android:layout_height="33dp"
   android:layout_marginLeft="30dp"
   android:padding="6dp"
   android:gravity="center"
   android:drawableLeft="@drawable/upass"
   />
 </FrameLayout>
 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:gravity="center"
  >
  <CheckBox
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="记住密码"
   android:id="@+id/login_auto"
   />
  <CheckBox
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginLeft="50dp"
   android:text="自动登录"
   android:id="@+id/login_btn"
   />
 </LinearLayout>
 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:gravity="center"
  android:layout_margin="15dp"
  >
  <ImageButton
   android:layout_width="40dp"
   android:layout_height="40dp"
   android:src="@drawable/login_qq"
   />
  <ImageButton
   android:layout_width="40dp"
   android:layout_height="40dp"
   android:src="@drawable/login_weixin"
   android:layout_marginLeft="60dp"
   />
  <ImageButton
   android:layout_width="40dp"
   android:layout_height="40dp"
   android:src="@drawable/login_xinlan"
   android:layout_marginLeft="60dp"
   android:id="@+id/login_xinlan"
   />
 </LinearLayout>
 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:orientation="vertical">
  <Button
   android:layout_width="240dp"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:background="@drawable/a_radio_button_selector_1"
   android:gravity="center"
   android:text="登录"
   android:id="@+id/login_login"
   />
  <Button
   android:layout_width="240dp"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:layout_marginTop="20dp"
   android:background="@drawable/a_radio_button_selector_1"
   android:gravity="center"
   android:text="忘记密码"
   android:id="@+id/login_find"
   />
  <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_gravity="center"
   android:layout_marginTop="20dp"
   android:text="没有账号，立即注册"
   android:textColor="#6efafa"
   android:textSize="15dp"
   android:onClick="JumpRegister"
   />
 </LinearLayout>
</LinearLayout>

package com.example.application;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Toast;
import com.sun.util.DBHelper;
import java.util.HashMap;
import cn.sharesdk.framework.Platform;
import cn.sharesdk.framework.PlatformActionListener;
import cn.sharesdk.framework.ShareSDK;
import cn.sharesdk.sina.weibo.SinaWeibo;
public class MainActivity extends AppCompatActivity {
 public static String LoginUid=null;
 public static String LoginName=null;
 private Button login_login;
 private Button login_find;
 private EditText login_uname;
 private EditText login_upass;
 private CheckBox login_auto;
 private CheckBox login_btn;
 private SharedPreferences sp;
 private ImageButton login_xinlan;
 private Platform weibo;
 private DBHelper dbHelper;
 private SQLiteDatabase sqLiteDatabase;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  this.requestWindowFeature(Window.FEATURE_NO_TITLE);
  setContentView(R.layout.activity_main);
  //获取控件
  login_uname = (EditText) findViewById(R.id.login_uname);
  login_upass = (EditText) findViewById(R.id.login_upass);
  login_auto = (CheckBox) findViewById(R.id.login_auto); //记住密码
  login_btn = (CheckBox) findViewById(R.id.login_btn); //自动登录
  login_login = (Button) findViewById(R.id.login_login); //登录
  login_find = (Button) findViewById(R.id.login_find);
  login_xinlan = (ImageButton) findViewById(R.id.login_xinlan);
  //调用数据库
  dbHelper = new DBHelper(this,"dtb.db",null,1);
  sqLiteDatabase = dbHelper.getWritableDatabase();
  //第三方登录
  weibo = ShareSDK.getPlatform(SinaWeibo.NAME);
  login_xinlan.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    //回调信息，可以在这里获取基本的授权返回的信息，但是注意如果做提示和UI操作要传到主线程handler里去执行
    weibo.setPlatformActionListener(new PlatformActionListener
      () {
     @Override
     public void onComplete(Platform platform, int i, HashMap<String, Object> hashMap) {
      String openid = platform.getDb().getUserId();
      String nickname = platform.getDb().getUserName();
      Cursor cursor=sqLiteDatabase.rawQuery("select * from dtb_users where uname=?",new String[]{openid});
      LoginUid=cursor.getString(cursor.getColumnIndex("uid"));
      if(cursor.moveToNext()){
       Log.i("test","已经注册过！");
      }else{
       sqLiteDatabase.execSQL("insert into dtb_users(uname,upass,name,levelnumber) values('"+openid+"','null','"+nickname+"','"+1+"')");
      }
      //跳转
      MainActivity.LoginName=openid;
      Intent intent=new Intent(MainActivity.this,MainMianActivity.class);
      startActivity(intent);
     }
     @Override
     public void onError(Platform arg0, int arg1, Throwable arg2) {
      // TODO Auto-generated method stub
      arg2.printStackTrace();
     }
     @Override
     public void onCancel(Platform arg0, int arg1) {
      // TODO Auto-generated method stub
     }
    });
    //authorize与showUser单独调用一个即可
    weibo.authorize();//单独授权,OnComplete返回的hashmap是空的
    weibo.showUser(null);//授权并获取用户信息
    //移除授权
    // weibo.removeAccount(true);
   }
  });
  //自动登录判断
  sp = this.getSharedPreferences("userInfo",0);
  String name=sp.getString("USER_NAME", "");
  String pass =sp.getString("PASSWORD", "");
  boolean choseRemember =sp.getBoolean("remember", false);
  boolean choseAutoLogin =sp.getBoolean("autologin", false);
  //如果上次选了记住密码，那进入登录页面也自动勾选记住密码，并填上用户名和密码
  if(choseRemember){
   login_uname.setText(name);
   login_upass.setText(pass);
   login_auto.setChecked(true);
  }
  //如果上次登录选了自动登录，那进入登录页面也自动勾选自动登录
  if(choseAutoLogin){
   login_btn.setChecked(true);
   Cursor cursor= sqLiteDatabase.rawQuery("select * from dtb_users where uname=? and upass=?",new String[]{name,pass});
   if(cursor.moveToNext()){
    new LoginThread().start();
    LoginName=name;
    LoginUid=cursor.getString(cursor.getColumnIndex("uid"));
   }
  }
  // 登录监听事件 现在默认为用户名为：admin 密码：123
  login_login.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    String userName=login_uname.getText().toString();
    String userPass=login_upass.getText().toString();
    SharedPreferences.Editor editor =sp.edit();
    Cursor cursor= sqLiteDatabase.rawQuery("select * from dtb_users where uname=? and upass=?",new String[]{userName,userPass});
    if(cursor.moveToNext()){//判断是否查询到此数据
     Toast.makeText(MainActivity.this,"登录成功", Toast.LENGTH_SHORT).show();
      LoginName=userName;
     LoginUid=cursor.getString(cursor.getColumnIndex("uid"));
     //是否记住密码
     //记住用户名、密码、
     editor.putString("USER_NAME", userName);
     editor.putString("PASSWORD",userPass);
     if(login_auto.isChecked()){
      editor.putBoolean("remember", true);
     }else{
      editor.putBoolean("remember", false);
     }
     //是否自动登录
     if(login_btn.isChecked()){
      editor.putBoolean("autologin", true);
     }else{
      editor.putBoolean("autologin", false);
     }
      editor.commit();
     //跳转界面
     Intent intent = new Intent(MainActivity.this,MainMianActivity.class);
     startActivity(intent);
     Toast.makeText(MainActivity.this, "登录成功！", Toast.LENGTH_SHORT).show();
     // finish();
    }else{
     Toast.makeText(MainActivity.this,"用户名或密码错误，请重新登录", Toast.LENGTH_LONG).show();
    }
   }
  });
 }
 public void JumpRegister(View view){
  Intent intent=new Intent(this,RegisterActivity.class);
  startActivity(intent);
  finish();
 }
  //子线程 控制自动睡眠2秒钟后自动登录
 class LoginThread extends Thread{
  @Override
  public void run() {
   try {
    sleep(2000);
    Intent intent = new Intent(MainActivity.this,MainMianActivity.class);
    startActivity(intent);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
  }
 }
}