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();
   }
  }
 }
 
 
}