本篇文章给大家分享的是有关怎么在Android中使用SharedPreferences实现记住密码和自动登录，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。
XML文件
<?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>
Java文件
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();
}
}
}
}以上就是怎么在Android中使用SharedPreferences实现记住密码和自动登录，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。
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