Android基于Bmob后端云实现注册、登陆、找回密码、短信验证码

注重版权，转载请注明原作者和原文链接
作者：Bald programmer

文章目录

- 整体功能展示
- 创建应用
- 配置Bmob
- 前期准备
- - 一、数据表
  - 二、工具类
- 代码设计
- - 一、注册模块
  - 二、登陆模块
  - 三、找回密码
  - 四、注意事项

整体功能展示

（1）对手机号码进行检测（中国大陆+港澳地区）和密码要求检测
（2）通过短信验证码进行账号注册
（3）账号和密码都保存到云端
（4）小眼睛（密码可见切换）
（5）获取验证码按钮60s冷却

创建应用

首先在Bmob注册自己的账号 https://www.bmob.cn/ 注册账号就不一一教学了

然后打开我的控制台 → 创建应用，名称自己填写，类型看自己选择，我们选择开发版

创建好应用之后，打开刚刚创建的应用，在这里可以管理我们的应用

点击短信，选择自定义模板

模板名称一定要填写，短信内容、签名我们使用默认的即可（有需要也可以自行修改）

保存之后等待审核，这个时间还是比较久的，大家耐心等待即可

配置Bmob

implementation 'io.github.bmob:android-sdk:3.8.2'
implementation "io.reactivex.rxjava2:rxjava:2.2.8"
implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
implementation 'com.squareup.okhttp3:okhttp:3.14.1'
implementation 'com.squareup.okio:okio:2.2.2'
implementation 'com.google.code.gson:gson:2.8.5'

复制上面代码到如图位置，然后点击右上角的Sync Now加载

<!--允许联网 --> 
<uses-permission android:name="android.permission.INTERNET" /> 
<!--获取GSM（2g）、WCDMA（联通3g）等网络状态的信息  --> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
<!--获取wifi网络状态的信息 --> 
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 
<!--保持CPU 运转，屏幕和键盘灯有可能是关闭的,用于文件上传和下载 -->
<uses-permission android:name="android.permission.WAKE_LOCK" /> 
<!--获取sd卡写的权限，用于文件上传和下载-->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!--允许读取手机状态 用于创建BmobInstallation--> 
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

复制上面代码到如图位置

<provider
android:name="cn.bmob.v3.util.BmobContentProvider"
android:authorities="com.example.bmobloginservice.BmobContentProvider">
</provider>

复制上面代码到如图位置，并将图中小方形的代码修改为你自己的包名

Bmob的配置工作到这里就结束了，接下来就是敲代码了······

前期准备

一、数据表

首先我们创建一个类，类名自己取（到时候在自动Bmob后台会创建一个和类名一样的表），继承BmobObject类

package com.example.bmobloginservice;import cn.bmob.v3.BmobObject;public class User_Table extends BmobObject {//账号private String Account;//密码private String Password;public String getAccount() {return Account;}public void setAccount(String account) {Account = account;}public String getPassword() {return Password;}public void setPassword(String password) {Password = password;}
}

表数据有Account账号、Password密码两个字段

二、工具类

新建一个Check类，创建两个方法用于号码检测（PhoneCheck）和密码检测（PasswordCheck）

号码检测

判断输入的收集号码是否满足国内号码的要求

密码检测

判断输入的密码是否满足要求（最少有3个字母）

package com.example.bmobloginservice;import java.util.regex.Matcher;
import java.util.regex.Pattern;public class Check {/*** 手机号码检测* @param phone：输入的号码* @return true -->>号码正确，false-->>号码不正确*/public static boolean PhoneCheck(String phone){String ChineseMainland = "^((13[0-9])|(14[5,7,9])|(15[0-3,5-9])|(166)|(17[3,5,6,7,8])" + "|(18[0-9])|(19[8,9]))\\d{8}$";String HongKong = "^(5|6|8|9)\\d{7}$";Matcher C = Pattern.compile(ChineseMainland).matcher(phone);Matcher H = Pattern.compile(HongKong).matcher(phone);return C.matches() || H.matches();}/*** 密码检测（是否符合最少3个字母的要求）* @param password：输入的密码* @return true-->>密码格式正确，false-->>密码格式不正确*/public static boolean PasswordCheck(String password){char[] s = password.toCharArray();int count=0;for (int i = 0; i < s.length; i++) {if ((s[i]>='a'&&s[i]<='z') || (s[i]>='A'&&s[i]<='Z')){count++;}}if (count>=3){return true;}else {return false;}}
}

代码设计

一、注册模块

布局文件

drawable包下的button_bg布局文件的代码

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android"><item><shape><solid android:color="#D1EEEE"></solid><corners android:radius="50dp"></corners></shape></item>
</selector>

res包下的register布局文件的代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@mipmap/background"><EditTextandroid:id="@+id/AccountText"android:layout_width="300dp"android:layout_height="50dp"android:layout_marginTop="175dp"android:ems="10"android:hint="手机号码"android:textSize="16dp"android:drawableLeft="@mipmap/account"android:drawablePadding="10dp"android:inputType="textPersonName"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><EditTextandroid:id="@+id/PasswordText"android:layout_width="300dp"android:layout_height="45dp"android:layout_marginTop="30dp"android:ems="10"android:hint="密码由6~16位组成(最少3位字母)"android:textSize="16dp"android:drawableLeft="@mipmap/psd"android:drawablePadding="10dp"android:inputType="textPassword"app:layout_constraintStart_toStartOf="@+id/AccountText"app:layout_constraintTop_toBottomOf="@+id/AccountText" /><Buttonandroid:id="@+id/RegisterButton"android:layout_width="200dp"android:layout_height="60dp"android:layout_marginTop="100dp"android:background="@drawable/button_bg"android:text="注册"android:textSize="25dp"app:layout_constraintTop_toBottomOf="@+id/PasswordText"app:layout_constraintStart_toStartOf="parent"app:layout_constraintEnd_toEndOf="parent"/><TextViewandroid:id="@+id/RegisterTitle"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginBottom="60dp"android:text="Register"android:textSize="40dp"app:layout_constraintBottom_toTopOf="@+id/AccountText"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent" /><TextViewandroid:id="@+id/LoginButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:text="已有账号？点击登陆"android:textSize="15dp"app:layout_constraintRight_toRightOf="@id/PasswordText"app:layout_constraintTop_toBottomOf="@id/RegisterButton"/><EditTextandroid:id="@+id/SMS_Code"android:layout_width="150dp"android:layout_height="50dp"android:layout_marginTop="30dp"android:ems="10"android:hint="验证码"android:textSize="16dp"android:inputType="textPersonName"android:paddingLeft="10dp"app:layout_constraintLeft_toLeftOf="@id/PasswordText"app:layout_constraintTop_toBottomOf="@id/PasswordText" /><Buttonandroid:id="@+id/GetCode"android:layout_width="140dp"android:layout_height="50dp"android:layout_marginTop="30dp"android:background="#00000000"android:text="获取验证码"android:textSize="18dp"app:layout_constraintTop_toBottomOf="@id/PasswordText"app:layout_constraintRight_toRightOf="@id/PasswordText"/><TextViewandroid:id="@+id/ShowButton"android:layout_width="50dp"android:layout_height="50dp"android:layout_marginBottom="5dp"android:background="@mipmap/eye"app:layout_constraintBottom_toBottomOf="@+id/PasswordText"app:layout_constraintRight_toRightOf="@+id/PasswordText"/>
</androidx.constraintlayout.widget.ConstraintLayout>

后台java代码

package com.example.bmobloginservice;import androidx.appcompat.app.AppCompatActivity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.text.TextUtils;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;import java.util.List;import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.BmobSMS;
import cn.bmob.v3.exception.BmobException;
import cn.bmob.v3.listener.FindListener;
import cn.bmob.v3.listener.QueryListener;
import cn.bmob.v3.listener.SaveListener;
import cn.bmob.v3.listener.UpdateListener;public class Register extends AppCompatActivity {TextView RegisterTitle; //注册标题EditText AccountText;   //账号EditText PasswordText;  //密码EditText SMS_Code;      //验证码TextView LoginButton;   //回到登录按钮Button RegisterButton;  //注册按钮Button GetCode;         //获取验证码按钮TextView ShowButton;    //小眼睛按钮boolean ShowPassword;   //密码可见状态（初始不可见）@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.register);Bmob.initialize(Register.this,"你的Application ID（Bmob设置里可以看到）");init();//获取验证码GetCode.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//获取客户端输入的账号final String Account = AccountText.getText().toString().trim();//isEmpty()方法判断是否为空if (TextUtils.isEmpty(Account)){Toast.makeText(Register.this,"请填写手机号码",Toast.LENGTH_SHORT).show();}else if (Check.PhoneCheck(Account.trim()) != true){Toast.makeText(Register.this,"请填写正确的手机号码",Toast.LENGTH_SHORT).show();}else {BmobQuery<User_Table> bmobQuery = new BmobQuery<>();bmobQuery.findObjects(new FindListener<User_Table>() {@Overridepublic void done(List<User_Table> object, BmobException e) {if (e == null) {int count=0;    //判断是否查询到尾for (User_Table user_table : object) {if (user_table.getAccount().equals(Account)){Toast.makeText(Register.this,"该账号已注册过",Toast.LENGTH_SHORT).show();break;}count++;}//查询到尾，说明没有重复账号if (count == object.size()){SendSMS(Account);}}else {SendSMS(Account);}}});}}});/*** 注册*/RegisterButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//账号(Account)、密码(Password)final String Account = AccountText.getText().toString().trim();final String Password = PasswordText.getText().toString().trim();if (TextUtils.isEmpty(Password)){Toast.makeText(Register.this,"请填写密码",Toast.LENGTH_SHORT).show();}else if (Password.length()<6){Toast.makeText(Register.this,"密码不得少于6位数",Toast.LENGTH_SHORT).show();}else if (Password.length()>16){Toast.makeText(Register.this,"密码不得多于16位数",Toast.LENGTH_SHORT).show();}else if (Check.PasswordCheck(Password) != true){Toast.makeText(Register.this,"密码最少包含3个字母",Toast.LENGTH_SHORT).show();}else if (TextUtils.isEmpty(SMS_Code.getText().toString().trim())){Toast.makeText(Register.this,"请填写验证码",Toast.LENGTH_SHORT).show();} else {//短信验证码效验BmobSMS.verifySmsCode(Account, SMS_Code.getText().toString().trim(), new UpdateListener() {@Overridepublic void done(BmobException e) {if (e == null) {//将用户信息存储到Bmob云端数据final User_Table user = new User_Table();user.setAccount(Account);user.setPassword(Password);user.save(new SaveListener<String>() {@Overridepublic void done(String s, BmobException e) {if (e == null) {//注册成功，回到登录页面Toast.makeText(Register.this,"注册成功",Toast.LENGTH_SHORT).show();finish();}else {Toast.makeText(Register.this,"注册失败",Toast.LENGTH_SHORT).show();}}});}else {SMS_Code.setText("");Toast.makeText(Register.this,"验证码错误"+e.getErrorCode(),Toast.LENGTH_SHORT).show();}}});}}});//返回登陆界面LoginButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {finish();}});ShowButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (ShowPassword == false) {//密码不可见-->>密码可见PasswordText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = true;}else {//密码可见-->>密码不可见PasswordText.setTransformationMethod(PasswordTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = false;}}});}public void init(){//注册标题(Title)、账号(Account)、密码(Password)、验证码(SMS_Code)RegisterTitle = findViewById(R.id.RegisterTitle);AccountText = findViewById(R.id.AccountText);PasswordText = findViewById(R.id.PasswordText);SMS_Code = findViewById(R.id.SMS_Code);//回到登录按钮(Login)、注册按钮(Register)、验证码获取按钮(GetCode)LoginButton = findViewById(R.id.LoginButton);RegisterButton = findViewById(R.id.RegisterButton);GetCode = findViewById(R.id.GetCode);//将密码文本初始设置为不可见状态ShowButton = findViewById(R.id.ShowButton);ShowPassword = false;//设置标题字体样式(方舒整体 常规)RegisterTitle.setTypeface(Typeface.createFromAsset(getAssets(),"font/FZSTK.TTF"));//设置按钮文本字体样式(方舒整体 常规)RegisterButton.setTypeface(Typeface.createFromAsset(getAssets(),"font/FZSTK.TTF"));//设置背景图片透明度(0~255，值越小越透明)RegisterButton.getBackground().setAlpha(100);}/*** 发送验证码* @param account：输入的手机号码*  SMS 为Bmob短信服务自定义的短信模板名字*/private void SendSMS(String account){BmobSMS.requestSMSCode(account, "自定义短信模板的名字", new QueryListener<Integer>() {@Overridepublic void done(Integer smsId, BmobException e) {if (e == null) {Toast.makeText(Register.this,"验证码已发送",Toast.LENGTH_LONG).show();} else {Toast.makeText(Register.this,"发送验证码失败：" + e.getErrorCode() + "-" + e.getMessage(),Toast.LENGTH_SHORT).show();}}});/*** 设置按钮60s等待* onTick()方法——>>计时进行时的操作*      ：显示倒计时，同时设置按钮不可点击* onFinish()方法——>>计时完成时的操作*      ：刷新原文本，同时设置按钮可以点击*/CountDownTimer timer =new CountDownTimer(60000,1000) {@Overridepublic void onTick(long millisUntilFinished) {GetCode.setEnabled(false);GetCode.setText("重新获取("+millisUntilFinished/1000+"s)");}@Overridepublic void onFinish() {GetCode.setEnabled(true);GetCode.setText("获取验证码");}}.start();}
}

二、登陆模块

布局文件

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@mipmap/background"><EditTextandroid:id="@+id/AccountText"android:layout_width="300dp"android:layout_height="50dp"android:layout_marginTop="175dp"android:ems="10"android:hint="手机号码"android:drawableLeft="@mipmap/account"android:drawablePadding="10dp"android:inputType="textPersonName"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><EditTextandroid:id="@+id/PasswordText"android:layout_width="300dp"android:layout_height="50dp"android:layout_marginTop="44dp"android:ems="10"android:hint="密码"android:drawableLeft="@mipmap/psd"android:drawablePadding="10dp"android:inputType="textPassword"app:layout_constraintStart_toStartOf="@+id/AccountText"app:layout_constraintTop_toBottomOf="@+id/AccountText" /><Buttonandroid:id="@+id/LoginButton"android:layout_width="200dp"android:layout_height="60dp"android:layout_marginTop="16dp"android:background="@drawable/button_bg"android:drawableLeft="@mipmap/login_button"android:paddingLeft="50dp"android:textSize="26dp"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintHorizontal_bias="0.497"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@id/PasswordText" /><TextViewandroid:id="@+id/LoginTitle"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginBottom="60dp"android:text="Login"android:textSize="40dp"app:layout_constraintBottom_toTopOf="@+id/AccountText"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"/><TextViewandroid:id="@+id/FindPasswordButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:text="忘记密码?"android:textSize="18dp"app:layout_constraintLeft_toLeftOf="@+id/PasswordText"app:layout_constraintTop_toBottomOf="@+id/LoginButton"/><TextViewandroid:id="@+id/RegisterButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:text="注册"android:textSize="18dp"app:layout_constraintRight_toRightOf="@id/PasswordText"app:layout_constraintTop_toBottomOf="@id/LoginButton"/><TextViewandroid:id="@+id/ShowButton"android:layout_width="50dp"android:layout_height="50dp"android:layout_marginBottom="5dp"android:background="@mipmap/eye"app:layout_constraintRight_toRightOf="@+id/PasswordText"app:layout_constraintBottom_toBottomOf="@+id/PasswordText"/></androidx.constraintlayout.widget.ConstraintLayout>

后台java代码

package com.example.bmobloginservice;import androidx.appcompat.app.AppCompatActivity;import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.text.TextUtils;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;import java.util.List;import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.exception.BmobException;
import cn.bmob.v3.listener.FindListener;public class Login extends AppCompatActivity {//标题、账号、密码TextView LoginTitle;EditText AccountText;EditText PasswordText;//登陆按钮、注册按钮、密码找回按钮Button LoginButton;TextView RegisterButton;TextView FindPasswordButton;//眼睛按钮TextView ShowButton;//密码可见状态boolean ShowPassword;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.login);Bmob.initialize(Login.this,"你的Application ID（Bmob设置里可以看到）");init();/*** 登陆监听*/LoginButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//账号(Account)、密码(Password)final String Account = AccountText.getText().toString().trim();final String Password = PasswordText.getText().toString().trim();if (TextUtils.isEmpty(Account)) {Toast.makeText(Login.this, "请填写手机号码", Toast.LENGTH_SHORT).show();} else if (TextUtils.isEmpty(Password)) {Toast.makeText(Login.this, "请填写密码", Toast.LENGTH_SHORT).show();} else {BmobQuery<User_Table> bmobQuery = new BmobQuery<>();bmobQuery.findObjects(new FindListener<User_Table>() {@Overridepublic void done(List<User_Table> object, BmobException e) {if (e == null) {//判断信号量，若查找结束count和object长度相等，则没有查找到该账号int count=0;for (User_Table user_table : object) {if (user_table.getAccount().equals(Account)) {//已查找到该账号，检测密码是否正确if (user_table.getPassword().equals(Password)) {//密码正确，跳转（Home是登陆后跳转的页面）Toast.makeText(Login.this, "登陆成功", Toast.LENGTH_SHORT).show();Intent intent = new Intent(Login.this,Home.class);startActivity(intent);break;}else {Toast.makeText(Login.this, "密码错误", Toast.LENGTH_SHORT).show();break;}}count++;}if (count >= object.size()){Toast.makeText(Login.this,"该账号不存在",Toast.LENGTH_SHORT).show();}}else {Toast.makeText(Login.this,"该账号不存在",Toast.LENGTH_SHORT).show();}}});}}});//跳转到密码找回界面FindPasswordButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent();intent.setClass(Login.this, FindPassword.class);startActivity(intent);}});//跳转到注册界面RegisterButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent =  new Intent();intent.setClass(Login.this, Register.class);startActivity(intent);}});//密码可见和不可见ShowButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (ShowPassword == false) {PasswordText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = true;}else {PasswordText.setTransformationMethod(PasswordTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = false;}}});}//View初始化public void init(){//Login标题(LoginTitle)、账号(AccountText)、密码(PasswordText)LoginTitle = findViewById(R.id.LoginTitle);AccountText = findViewById(R.id.AccountText);PasswordText = findViewById(R.id.PasswordText);//登录按钮(Login)、跳到注册按钮(Register)、跳到密码找回按钮(FindPassword)LoginButton = findViewById(R.id.LoginButton);RegisterButton = findViewById(R.id.RegisterButton);FindPasswordButton = findViewById(R.id.FindPasswordButton);ShowButton = findViewById(R.id.ShowButton);//密码初始状态为不可见（false不可见，true可见）ShowPassword = false;//设置Login标题字体样式(华文彩云)LoginTitle.setTypeface(Typeface.createFromAsset(getAssets(),"font/FZSTK.TTF"));//设置背景图片透明度(0~255，值越小越透明)LoginButton.getBackground().setAlpha(100);}
}

三、找回密码

布局文件

XML代码

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@mipmap/background"><EditTextandroid:id="@+id/AccountText"android:layout_width="280dp"android:layout_height="50dp"android:layout_marginTop="175dp"android:ems="10"android:inputType="textPersonName"android:hint="手机号码"android:textSize="16dp"android:drawableLeft="@mipmap/account"android:drawablePadding="10dp"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent"/><EditTextandroid:id="@+id/SMS_Code"android:layout_width="120dp"android:layout_height="50dp"android:layout_marginTop="40dp"android:ems="10"android:inputType="textPersonName"android:hint="验证码"android:textSize="16dp"android:paddingLeft="10dp"app:layout_constraintTop_toBottomOf="@id/AccountText"app:layout_constraintLeft_toLeftOf="@id/AccountText"/><Buttonandroid:id="@+id/GetCode"android:layout_width="140dp"android:layout_height="50dp"android:layout_marginTop="40dp"android:background="#00000000"android:text="获取验证码"android:textSize="18dp"app:layout_constraintTop_toBottomOf="@id/AccountText"app:layout_constraintRight_toRightOf="@id/AccountText"/><EditTextandroid:id="@+id/PasswordText"android:layout_width="280dp"android:layout_height="50dp"android:layout_marginTop="40dp"android:ems="10"android:hint="密码由6~16位组成(最少3位字母)"android:textSize="16dp"android:drawableLeft="@mipmap/psd"android:drawablePadding="10dp"android:inputType="textPassword"app:layout_constraintTop_toBottomOf="@id/SMS_Code"app:layout_constraintLeft_toLeftOf="@id/SMS_Code"/><TextViewandroid:id="@+id/FindPasswordTitle"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginBottom="60dp"android:text="密码找回"android:textSize="30dp"app:layout_constraintStart_toStartOf="parent"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintBottom_toTopOf="@id/AccountText"/><TextViewandroid:id="@+id/LoginButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dp"android:text="返回登陆"android:textSize="18dp"app:layout_constraintTop_toBottomOf="@id/ModifyButton"app:layout_constraintRight_toRightOf="@id/PasswordText"/><Buttonandroid:id="@+id/ModifyButton"android:layout_width="200dp"android:layout_height="50dp"android:layout_marginTop="20dp"android:background="@drawable/button_bg"android:text="确认修改"android:textSize="20dp"app:layout_constraintTop_toBottomOf="@+id/PasswordText"app:layout_constraintRight_toRightOf="@+id/PasswordText"app:layout_constraintLeft_toLeftOf="@+id/PasswordText"/><TextViewandroid:id="@+id/ShowButton"android:layout_width="50dp"android:layout_height="50dp"android:layout_marginBottom="3dp"android:background="@mipmap/eye"app:layout_constraintRight_toRightOf="@+id/PasswordText"app:layout_constraintBottom_toBottomOf="@+id/PasswordText"/>
</androidx.constraintlayout.widget.ConstraintLayout>

后台java代码

package com.example.bmobloginservice;import androidx.appcompat.app.AppCompatActivity;import android.graphics.Typeface;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.text.TextUtils;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;import java.util.List;import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.BmobSMS;
import cn.bmob.v3.exception.BmobException;
import cn.bmob.v3.listener.FindListener;
import cn.bmob.v3.listener.QueryListener;
import cn.bmob.v3.listener.UpdateListener;public class FindPassword extends AppCompatActivity {EditText AccountText;EditText PasswordText;EditText SMS_Code;Button ModifyButton;Button GetCode;TextView FindPasswordTitle;TextView LoginButton;TextView ShowButton;boolean ShowPassword;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.find_password);Bmob.initialize(FindPassword.this,"你的Application ID（Bmob设置里可以看到）");init();/*** 获取验证码*/GetCode.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//获取账号(Account)final String Account = AccountText.getText().toString().trim();if (TextUtils.isEmpty(Account)){Toast.makeText(FindPassword.this,"请填写账号",Toast.LENGTH_SHORT).show();}else if (Check.PhoneCheck(Account) != true){Toast.makeText(FindPassword.this,"请填写正确的手机号码",Toast.LENGTH_SHORT).show();}else {BmobQuery<User_Table> bmobQuery = new BmobQuery<>();bmobQuery.findObjects(new FindListener<User_Table>() {@Overridepublic void done(List<User_Table> object, BmobException e) {if (e == null) {int count=0;for (User_Table user_table : object) {//检查是否存在该账号if (user_table.getAccount().equals(Account)){SendSMS(Account);break;}count++;}if (count >= object.size()){Toast.makeText(FindPassword.this,"该账户不存在",Toast.LENGTH_SHORT).show();}}else {Toast.makeText(FindPassword.this,"该账户不存在",Toast.LENGTH_SHORT).show();}}});}}});/*** 修改密码*/ModifyButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//获取输入的账号(Account)、密码(Password)、验证码(Code)final String Account = AccountText.getText().toString().trim();final String Password = PasswordText.getText().toString().trim();String Code = SMS_Code.getText().toString().trim();if (TextUtils.isEmpty(Account)){Toast.makeText(FindPassword.this,"请填写账号",Toast.LENGTH_SHORT).show();}else if (TextUtils.isEmpty(Code)){Toast.makeText(FindPassword.this,"请填写验证码",Toast.LENGTH_SHORT).show();}else if (TextUtils.isEmpty(Password)){Toast.makeText(FindPassword.this,"请填写密码",Toast.LENGTH_SHORT).show();}else if (Password.length()<6){Toast.makeText(FindPassword.this,"密码不得少于6位数",Toast.LENGTH_SHORT).show();}else if (Password.length()>16){Toast.makeText(FindPassword.this,"密码不得多于16位数",Toast.LENGTH_SHORT).show();}else if (Check.PasswordCheck(Password) != true){Toast.makeText(FindPassword.this,"密码最少包含3个字母",Toast.LENGTH_SHORT).show();}else {//发送验证码BmobSMS.verifySmsCode(Account, Code, new UpdateListener() {@Overridepublic void done(BmobException e) {if (e == null) {BmobQuery<User_Table> bmobQuery = new BmobQuery<>();bmobQuery.findObjects(new FindListener<User_Table>() {@Overridepublic void done(List<User_Table> object, BmobException e) {if (e == null) {for (User_Table user_table : object) {if (user_table.getAccount().equals(Account)){//Bmob云端数据更新User_Table user = new User_Table();user.setPassword(Password);user.update(user_table.getObjectId(), new UpdateListener() {@Overridepublic void done(BmobException e) {if (e == null) {Toast.makeText(FindPassword.this,"密码修改成功",Toast.LENGTH_SHORT).show();}else {Toast.makeText(FindPassword.this,"修改失败"+"\n"+"错误代码："+e.getErrorCode(),Toast.LENGTH_LONG).show();}}});break;}}}else {Toast.makeText(FindPassword.this,"该账号不存在",Toast.LENGTH_LONG).show();}}});finish();}else {Toast.makeText(FindPassword.this,"验证码错误",Toast.LENGTH_SHORT).show();}}});}}});//跳转登陆LoginButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {finish();}});ShowButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (ShowPassword == false) {//密码不可见-->>密码可见PasswordText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = true;}else {//密码可见-->>密码不可见PasswordText.setTransformationMethod(PasswordTransformationMethod.getInstance());PasswordText.setSelection(PasswordText.getText().toString().length());ShowPassword = false;}}});}private void init(){//账号、密码、验证码AccountText = findViewById(R.id.AccountText);PasswordText = findViewById(R.id.PasswordText);SMS_Code = findViewById(R.id.SMS_Code);//回到登录按钮、获取验证码按钮、修改密码按钮FindPasswordTitle = findViewById(R.id.FindPasswordTitle);LoginButton = findViewById(R.id.LoginButton);GetCode = findViewById(R.id.GetCode);ModifyButton = findViewById(R.id.ModifyButton);//设置标题字体样式(方舒整体 常规)FindPasswordTitle.setTypeface(Typeface.createFromAsset(getAssets(),"font/FZSTK.TTF"));//眼睛按钮ShowButton = findViewById(R.id.ShowButton);ShowPassword = false;}/*** 发送验证码* @param account：输入的手机号码*  SMS 为Bmob短信服务自定义的短信模板名字*/private void SendSMS(String account){//发送短信验证码BmobSMS.requestSMSCode(account, "自定义短信模板的名字", new QueryListener<Integer>() {@Overridepublic void done(Integer integer, BmobException e) {if (e == null) {Toast.makeText(FindPassword.this,"验证码已发送",Toast.LENGTH_LONG).show();}else {Toast.makeText(FindPassword.this,"短信发送失败"+"\n"+"错误代码："+e.getErrorCode(),Toast.LENGTH_LONG).show();}}});//设置按钮60s等待点击CountDownTimer timer = new CountDownTimer(60000,1000) {@Overridepublic void onTick(long millisUntilFinished) {GetCode.setEnabled(false);GetCode.setText("重新获取("+millisUntilFinished/1000+"s)");}@Overridepublic void onFinish() {GetCode.setEnabled(true);GetCode.setText("获取验证码");}}.start();}
}