移动技能开发：保存密码和自动登录 - ToB企服应用市场:ToB评测及商务社交产业平台

<?xml version="1.0" encoding="utf-8"?>
<TableLayout 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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TableRow>
<TextView
android:text="账号"
android:layout_marginRight="10dp"
android:textSize="18sp"
/>
<EditText
android:id="@+id/userNameET"
android:hint="请输入账号"
/>
</TableRow>
<TableRow>
<TextView
android:text="密码"
android:layout_marginRight="10dp"
android:textSize="18sp"
/>
<EditText
android:id="@+id/passWordET"
android:hint="请输入密码"
/>
</TableRow>
<TableRow>
<CheckBox
android:id="@+id/savePwdCB"
android:text="记住密码"
/>
<CheckBox
android:id="@+id/autoLoginCB"
android:text="自动登录"
/>
<Button
android:id="@+id/loginBtn"
android:text="登录"
/>
</TableRow>
</TableLayout>

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<?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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoginSuccessActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录成功"
/>
</LinearLayout>

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package com.example.savelogininfotest;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class MainActivity extends AppCompatActivity {
private EditText userNameET = null;
private EditText passWordET = null;
private CheckBox savePwdCB = null;
private CheckBox autoLoginCB = null;
private Button loginBtn = null;
private String userName = null;
private String userPwd= null;
private SharedPreferences loginPreferences = null;
private SharedPreferences.Editor loginEditor = null;
private boolean isSavePwd = false;//用户是否选中记住密码的标志变量
private boolean isAutoLogin = false;//用户是否选中自动登录的标志变量
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
userNameET = findViewById(R.id.userNameET);
passWordET = findViewById(R.id.passWordET);
savePwdCB = findViewById(R.id.savePwdCB);
autoLoginCB = findViewById(R.id.autoLoginCB);
loginBtn = findViewById(R.id.loginBtn);
loginBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//创建存取用户名和密码以及是否记住密码和是否自动登录的标志变量的编辑器
loginEditor = loginPreferences.edit();
userName = userNameET.getText().toString().trim();//获取用户输入的用户名
userPwd = passWordET.getText().toString().trim();//获取用户输入的密码
//编辑器将用户名和密码以键值对的方式封装
loginEditor.putString("userName",userName);
loginEditor.putString("userPwd",userPwd);
//编辑器将是否记住密码和是否自动登录的值以键值对的方式封装
loginEditor.putBoolean("isSavePwd",savePwdCB.isChecked());
loginEditor.putBoolean("isAutoLogin",autoLoginCB.isChecked());
loginEditor.commit();//将前面的四个键值对提交存放到本地文件中
welcomeLoad();//调用跳转到登录成功页面的方法
}
});
loginPreferences = getSharedPreferences("login", Context.MODE_PRIVATE);
isSavePwd = loginPreferences.getBoolean("isSavePwd",false);
isAutoLogin = loginPreferences.getBoolean("isAutoLogin",false);
userName = loginPreferences.getString("userName",null);
userPwd = loginPreferences.getString("userPwd",null);
if (isAutoLogin){//判断用户上次是否选中了“自动登录”
welcomeLoad();
}else {
loadLogin();
}
}
//定义跳转到登录成功页面的方法
private void welcomeLoad(){
//跳转到“登录成功”
Intent intent = new Intent(MainActivity.this, LoginSuccessActivity.class);
startActivity(intent);
}
//定义登录方法
private void loadLogin(){
if (isSavePwd){//判断用户上次是否选中了“记住密码”
userNameET.setText(userName);//将用户名填充到输入文本框
passWordET.setText(userPwd);//将密码填充到输入文本框
savePwdCB.setChecked(true);//将“记住密码”选择框勾选住
}
//为“自动登录”选择框添加事件监听
autoLoginCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked){//如果勾选了“自动登录”
savePwdCB.setChecked(true);//将“记住密码”选择框勾选住
}
}
});
}
}

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package com.example.savelogininfotest;
import android.os.Bundle;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class LoginSuccessActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login_success);
}
}

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