【安卓app开发一】Android Studio + Bmob后端云实现注册&登录账号、密码找回、意见反馈及数据可视化

目录

前言

概览

Bmob后端云介绍

Bmob后端云与Android Studio配置

一、Bmob后端云

 二、Android Studio配置

工具类

一、User类

二、Suit类

三、Code类

实现类

 一、登录代码

 二、注册代码

 三、找回密码代码

 四、想法反馈代码

---

前言

        本项目尚在开发阶段，主要针对的是安卓用户，通过查阅开发文档以及借鉴其他博主，由于是个人开发，可能会在逻辑会有所缺漏，欢迎各位安卓使用者与开发者进行内测并提交反馈意见给我，进行探讨顺便带带我；

        本项目开发主题尚未决定，故本期向各位征集意见，可以通过安装该app进行注册登录，并写下您的想法提交反馈给我，后续将对收集的idea进行整合并决定方向，进行下一步的开发。

        ps:保证无病毒与无信息泄露！！！欢迎大家参与

源代码：

链接：https://pan.baidu.com/s/10ECb54ne_9bubuCLWLB-Kw?pwd=v2sh 
提取码：v2sh

安卓手机软件安装包：

链接：https://pan.baidu.com/s/1a2H5CKxKvtAjvnyOHvybUQ?pwd=np3w 
提取码：np3w

---

概览

        本期主要用到两个工具，Android Studio和Bmob后端云（后续介绍），在安卓客户端注册登陆并提交想法，最终在Bmob后端云中实现数据可视化，主要实现效果如下图所示

• Android Studio

• Bmob后端云

         Android Studio在此不做介绍了，以下是对Bmob后端云的介绍

Bmob后端云介绍

        本次采用Bmob后端云（Bmob后端云 (bmobapp.com)）主要是其集成了数据库与服务器，对于很多Android/ios/wp个人移动开发者来说，开发一个具有网络功能的应用不是一件容易的事，不仅需要购买/租赁服务器，还必须掌握一门诸如Java/.net/php这类的服务器开发语言，每开发一款移动应用程序，就必须开发维护对应的服务器程序，鉴于此我目前水平有限，故先采用Bmob后端云进行开发，给应用软件快速添加一个安全灵活的后台管理系统，方便浏览终端保存的各种信息。

---

Bmob后端云与Android Studio配置

一、Bmob后端云

• 官网注册账号 （Bmob后端云 (bmobapp.com)）

• 创建应用

• 创建表单，默认有一个_User表单（不用管），要新建一个User表单（名称要与后边安卓代码相同），数据将会在这个表单呈现

•  获取key秘钥，后边需要用

 二、Android Studio配置

•  AndroidManifest.xml:

        1、添加网络权限

        在上图位置添加下方代码以添加网络权限

<!--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" />

        2、连接Bmob

         在上图位置添加下方代码，并将蓝色方框中的代码替换成红色箭头所指的自己代码的包名

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

•  在Activity中对Bmob进行初始化，在OnCreat方法中添加下方代码并将你的应用ID替换成上方Bmob配置时获取的key密钥

Bmob.initialize(this,"你的应用ID");

• 在build.gradle(Module:app)中添加包

implementation 'io.github.bmob:android-sdk:3.9.4'
implementation 'io.reactivex.rxjava2:rxjava:2.2.8'
implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
implementation 'com.squareup.okhttp3:okhttp:4.8.1'
implementation 'com.squareup.okio:okio:2.2.2'
implementation 'com.google.code.gson:gson:2.8.5'

        至此，配置已全部完成，接下来是进行界面设计与逻辑代码编写环节

---

工具类

一、User类

        这个工具类的名称与前边在Bmob创建的表单名称相同，这个类继承于BmobObject，其属性相当于在表中的数据。

package com.example.application.tool;

import java.io.Serializable;

import cn.bmob.v3.BmobObject;

public class User extends BmobObject implements Serializable {
    private String Acctount;//手机账户
    private String Password;//密码
    private String Context;//反馈内容

    public String getAcctount() {
        return Acctount;
    }

    public void setAcctount(String acctount) {
        Acctount = acctount;
    }

    public String getPassword() {
        return Password;
    }

    public void setPassword(String password) {
        Password = password;
    }

    public String getContext() {
        return Context;
    }

    public void setContext(String context) {
        Context = context;
    }
}

二、Suit类

        这个类主要是号码检测（是否符合格式）与密码检测（至少包含3个字母）

package com.example.application.tool;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Suit {
    //手机号码检测
    public static boolean PhoneSuit(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（最少3个字母）
    public static boolean PasswordSuit(String password){
        char[] s = password.toCharArray();
        int count = 0 ;
        //检测所有的密码中有多少个字母
        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;
        }
    }
}

三、Code类

        这个类主要是生成验证码图片，由于目前短信验证在资源上有数量限制，故采用验证码图片进行验证，在实现类中通过创建类对象调用类方法实现对验证码图片的生成。

package com.example.application.tool;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;

import java.util.Random;

public class Code {

    //随机数数组
    private static final char[] CHARS = {
            '2', '3', '4', '5', '6', '7', '8', '9',
            'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm',
            'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
            'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
    };

    private static Code bmpCode;

    public static Code getInstance() {
        if(bmpCode == null)
            bmpCode = new Code();
        return bmpCode;
    }

    //default settings
    //验证码默认随机数的个数
    private static final int DEFAULT_CODE_LENGTH = 4;
    //默认字体大小
    private static final int DEFAULT_FONT_SIZE = 25;
    //默认线条的条数
    private static final int DEFAULT_LINE_NUMBER = 5;
    //padding值
    private static final int BASE_PADDING_LEFT = 10, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 15, RANGE_PADDING_TOP = 20;
    //验证码的默认宽高
    private static final int DEFAULT_WIDTH = 100, DEFAULT_HEIGHT = 40;

    //settings decided by the layout xml
    //canvas width and height
    private int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT;

    //random word space and pading_top
    private int base_padding_left = BASE_PADDING_LEFT, range_padding_left = RANGE_PADDING_LEFT,
            base_padding_top = BASE_PADDING_TOP, range_padding_top = RANGE_PADDING_TOP;

    //number of chars, lines; font size
    private int codeLength = DEFAULT_CODE_LENGTH, line_number = DEFAULT_LINE_NUMBER, font_size = DEFAULT_FONT_SIZE;

    //variables
    private String code;
    private int padding_left, padding_top;
    private Random random = new Random();
    //验证码图片
    public Bitmap createBitmap() {
        padding_left = 0;

        Bitmap bp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(bp);

        code = createCode();

        c.drawColor(Color.WHITE);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setTextSize(font_size);
        //画验证码
        for (int i = 0; i < code.length(); i++) {
            randomTextStyle(paint);
            randomPadding();
            c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);
        }
        //画线条
        for (int i = 0; i < line_number; i++) {
            drawLine(c, paint);
        }

        //c.save(Canvas.ALL_SAVE_FLAG);//保存
        c.save();
        c.restore();
        return bp;
    }

    public String getCode() {
        return code;
    }

    //生成验证码
    private String createCode() {
        StringBuilder buffer = new StringBuilder();
        for (int i = 0; i < codeLength; i++) {
            buffer.append(CHARS[random.nextInt(CHARS.length)]);
        }
        return buffer.toString();
    }
    //画干扰线
    private void drawLine(Canvas canvas, Paint paint) {
        int color = randomColor();
        int startX = random.nextInt(width);
        int startY = random.nextInt(height);
        int stopX = random.nextInt(width);
        int stopY = random.nextInt(height);
        paint.setStrokeWidth(1);
        paint.setColor(color);
        canvas.drawLine(startX, startY, stopX, stopY, paint);
    }
    //生成随机颜色
    private int randomColor() {
        return randomColor(1);
    }

    private int randomColor(int rate) {
        int red = random.nextInt(256) / rate;
        int green = random.nextInt(256) / rate;
        int blue = random.nextInt(256) / rate;
        return Color.rgb(red, green, blue);
    }
    //随机生成文字样式，颜色，粗细，倾斜度
    private void randomTextStyle(Paint paint) {
        int color = randomColor();
        paint.setColor(color);
        paint.setFakeBoldText(random.nextBoolean());  //true为粗体，false为非粗体
        float skewX = random.nextInt(11) / 10;
        skewX = random.nextBoolean() ? skewX : -skewX;
        paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜
    }
    //随机生成padding值
    private void randomPadding() {
        padding_left += base_padding_left + random.nextInt(range_padding_left);
        padding_top = base_padding_top + random.nextInt(range_padding_top);
    }
}

---

实现类

 一、登录代码

•  布局代码

<?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:background="@mipmap/fm"
    android:orientation="vertical"
    tools:context=".activity.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="serif"
            android:gravity="center"
            android:padding="80dp"
            android:text="Login"
            android:textColor="@color/white"
            android:textSize="50dp"
            >
        </TextView>
    </LinearLayout>


    <LinearLayout
        android:paddingHorizontal="15dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/phone">
        </TextView>

        <EditText
            android:id="@+id/Login_Phone"
            android:hint="请输入手机号码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/password">
        </TextView>

        <EditText
            android:id="@+id/Login_Password"
            android:hint="请输入密码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <TextView
        android:id="@+id/Login"
        android:layout_marginTop="20dp"
        android:layout_gravity="center"
        android:background="@mipmap/jiantou"
        android:layout_width="80dp"
        android:layout_height="80dp">
    </TextView>

    <LinearLayout
        android:paddingHorizontal="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/Login_Lose"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="忘记密码?"
            android:textColor="#ECEFF1"
            android:textSize="25dp"
            >
        </TextView>

        <TextView
            android:id="@+id/Login_Resgister"
            android:layout_marginLeft="140dp"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:text="注册账号"
            android:textColor="#ECEFF1"
            android:textSize="25dp"
            >
        </TextView>
    </LinearLayout>
</LinearLayout>

•  实现代码

package com.example.application.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.example.application.R;
import com.example.application.tool.User;

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 MainActivity extends AppCompatActivity implements View.OnClickListener {

    private EditText login_phone;//输入收集号码
    private EditText login_password;//输入密码
    private TextView login;//登陆按钮
    private TextView login_lose;//忘记密码
    private TextView login_resgister;//注册账号
    private String phone;
    private String password;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Bmob.initialize(this,"ebb1d24c01600c55b1e8be7f2625d7a7");
        initView();
    }

    //初始化控件
    private void initView() {
        login_phone = findViewById(R.id.Login_Phone);
        login_password = findViewById(R.id.Login_Password);
        login = findViewById(R.id.Login);
        login_lose = findViewById(R.id.Login_Lose);
        login_resgister = findViewById(R.id.Login_Resgister);

        //启动监听事件
        login.setOnClickListener(this);
        login_lose.setOnClickListener(this);
        login_resgister.setOnClickListener(this);
    }

    //点击事件
    @Override
    public void onClick(View view) {
        //添加意图，切换画面
        Intent intent = new Intent();
        //选择监听按钮触发机制
        switch (view.getId()){
            case R.id.Login:
                Getdata();
                //没有输入号码、密码判断为空则弹窗提示
                if (TextUtils.isEmpty(phone)){
                    Toast.makeText(this,"请输入手机号码",Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(password)) {
                    Toast.makeText(this,"请输入密码",Toast.LENGTH_SHORT).show();
                } else {
                    BmobQuery<User> bmobQuery = new BmobQuery<>();
                    bmobQuery.findObjects(new FindListener<User>() {
                        @Override
                        public void done(List<User> object, BmobException e) {
                            //如果没有异常的话进行查询列表账号
                            if(e == null){
                                int count = 0;//计数
                                //遍历
                                for (User user : object) {
                                    //查询到与客户端输入的账号一致
                                    if (user.getAcctount().equals(phone)){
                                        //查询到与客户端输入的密码一致
                                        if (user.getPassword().equals(password)){
                                            intent.setClass(getApplicationContext(),First_interface.class);
                                            //传递对象，方便主界面获取到用户信息
                                            intent.putExtra("User",user);
                                            startActivity(intent);
                                            Toast.makeText(getApplicationContext(),"登陆成功",Toast.LENGTH_SHORT).show();
                                            break;
                                        }else {
                                            Toast.makeText(getApplicationContext(),"密码错误",Toast.LENGTH_SHORT).show();
                                        }
                                    }
                                    count++;
                                }
                                //遍历没有查询到，此时count++到object的数量
                                if (count >= object.size()){
                                    Toast.makeText(getApplicationContext(),"账号不存在",Toast.LENGTH_SHORT).show();
                                }
                            } else {
                                Toast.makeText(getApplicationContext(),"账号不存在",Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                }
                break;
            case R.id.Login_Lose:
                intent.setClass(getApplicationContext(),Findpassword.class);
                startActivity(intent);
                break;
            case R.id.Login_Resgister:
                intent.setClass(getApplicationContext(),Resgister.class);
                startActivity(intent);
                break;
        }
    }
    
    //获取输入的号码与密码
    public void Getdata(){
        phone = login_phone.getText().toString().trim();
        password = login_password.getText().toString().trim();
    }
}

 二、注册代码

• 布局代码

<?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:background="@mipmap/fm"
    tools:context=".activity.Resgister"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="serif"
            android:gravity="center"
            android:padding="80dp"
            android:text="Register"
            android:textColor="@color/white"
            android:textSize="50dp"
            >
        </TextView>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/phone">
        </TextView>

        <EditText
            android:id="@+id/Register_Phone"
            android:hint="请输入手机号码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/password">
        </TextView>

        <EditText
            android:id="@+id/Register_Password"
            android:hint="请输入密码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_weight="0.7"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:background="@mipmap/message">
        </TextView>

        <EditText
            android:id="@+id/Register_SMS"
            android:hint="请输入验证码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_weight="3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            >
        </EditText>

        <ImageView
            android:id="@+id/Register_Paint"
            android:gravity="center"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:textSize="20dp"
            android:layout_height="50dp"
            android:background="@color/white">
        </ImageView>
    </LinearLayout>

    <TextView
        android:id="@+id/Register"
        android:layout_marginTop="10dp"
        android:layout_width="100dp"
        android:layout_height="60dp"
        android:layout_gravity="center"
        android:background="@mipmap/register">
    </TextView>

    <TextView
        android:id="@+id/Login_Back"
        android:paddingRight="20dp"
        android:gravity="end"
        android:text="已有账号？去登录"
        android:textColor="#ECEFF1"
        android:textSize="25dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></TextView>
</LinearLayout>

•  实现代码

package com.example.application.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.application.R;
import com.example.application.tool.Code;
import com.example.application.tool.Suit;
import com.example.application.tool.User;

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;
import cn.bmob.v3.listener.SaveListener;

public class Resgister extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG = null;
    private EditText register_phone;//获取注册的手机号码
    private EditText register_password;//获取注册的密码
    private EditText register_sms;//输入验证码
    private TextView register;//注册
    private TextView login_back;//返回登陆
    private ImageView register_paint;//获取验证码
    private String phone;//客户端输入的手机号码
    private String passeword;//客户端输入的密码
    private String sms;//客户端输入的验证码
    private String realCode;//图形验证码

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_resgister);
        Bmob.initialize(this,"ebb1d24c01600c55b1e8be7f2625d7a7");
        initView();
    }

    //初始化控件
    private void initView() {
        //获取控件变量
        register_phone = findViewById(R.id.Register_Phone);
        register_password = findViewById(R.id.Register_Password);
        register_sms = findViewById(R.id.Register_SMS);
        register = findViewById(R.id.Register);
        login_back = findViewById(R.id.Login_Back);
        register_paint = findViewById(R.id.Register_Paint);

        //启动监听机制
        //将验证码用图片的形式显示出来
        register_paint.setImageBitmap(Code.getInstance().createBitmap());
        realCode = Code.getInstance().getCode().toLowerCase();
        register_paint.setOnClickListener(this);
        register.setOnClickListener(this);
        login_back.setOnClickListener(this);
    }

    //获取数据
    public void Getdata(){
        phone = register_phone.getText().toString().trim();
        passeword = register_password.getText().toString().trim();
        sms = register_sms.getText().toString().toLowerCase();
    }


    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.Register_Paint:
                register_paint.setImageBitmap(Code.getInstance().createBitmap());
                realCode = Code.getInstance().getCode().toLowerCase();
                Log.v(TAG,"realCode"+realCode);
                break;
            case R.id.Login_Back:
                finish();
                break;
            case R.id.Register:
                Getdata();
                //输入限制条件：不能为空、号码以及密码符合格式、密码数量限制条件：6到16
                if (TextUtils.isEmpty(phone)){
                    Toast.makeText(getApplicationContext(),"请输入手机号码",Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(passeword)) {
                    Toast.makeText(getApplicationContext(),"请输入密码",Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(sms)) {
                    Toast.makeText(getApplicationContext(),"请输入验证码",Toast.LENGTH_SHORT).show();
                } else if (Suit.PhoneSuit(phone.trim()) != true) {
                    Toast.makeText(getApplicationContext(),"请输入正确的手机号码",Toast.LENGTH_SHORT).show();
                } else if (Suit.PasswordSuit(passeword.trim()) != true) {
                    Toast.makeText(getApplicationContext(),"密码最少包含3个字母",Toast.LENGTH_SHORT).show();
                } else if (passeword.length() < 6) {
                    Toast.makeText(getApplicationContext(),"密码不得少于6位数",Toast.LENGTH_SHORT).show();
                } else if (passeword.length() > 16) {
                    Toast.makeText(getApplicationContext(),"密码不得多于16位数",Toast.LENGTH_SHORT).show();
                }else {
                    BmobQuery<User> bmobQuery = new BmobQuery<>();
                    bmobQuery.findObjects(new FindListener<User>() {
                        @Override
                        public void done(List<User> object, BmobException e) {
                            if (e == null){
                                int count = 0;//判断是否查询到尾--遍历
                                //查询判断用户是否已经存在
                                for (User user : object){
                                    if (user.getAcctount().equals(phone)){
                                        register_phone.setText("");
                                        Toast.makeText(getApplicationContext(),"该用户已经注册过",Toast.LENGTH_SHORT).show();
                                        finish();
                                        break;
                                    }
                                    count++;
                                }
                                //查询到尾没有
                                if (count == object.size()){
                                    //判断验证码是否正确
                                    if (sms.equals(realCode)) {
                                        Toast.makeText(getApplicationContext(),  "验证码正确", Toast.LENGTH_SHORT).show();
                                        //将用户信息存入bmob云端
                                        final User user = new User();
                                        user.setAcctount(phone);
                                        user.setPassword(passeword);
                                        user.save(new SaveListener<String>() {
                                            @Override
                                            public void done(String s, BmobException e) {
                                                if (e == null){
                                                    Toast.makeText(getApplicationContext(),"注册成功",Toast.LENGTH_SHORT).show();
                                                    finish();
                                                }else {
                                                    Toast.makeText(getApplicationContext(),"注册失败",Toast.LENGTH_SHORT).show();
                                                }
                                            }
                                        });
                                    } else {
                                        register_sms.setText("");
                                        Toast.makeText(getApplicationContext(), "验证码错误", Toast.LENGTH_SHORT).show();
                                    }
                                }
                            }else {
                                Toast.makeText(Resgister.this, "该用户不存在", Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                }
                break;
        }
    }
}

 三、找回密码代码

• 布局代码

<?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="@mipmap/fm"
    tools:context=".activity.Findpassword">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_marginTop="80dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fontFamily="serif"
            android:gravity="center"
            android:padding="20dp"
            android:text="FindPassword"
            android:textColor="@color/white"
            android:textSize="50dp"
            >
        </TextView>
    </LinearLayout>

    <LinearLayout
        android:layout_marginTop="20dp"
        android:paddingHorizontal="15dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/phone">
        </TextView>

        <EditText
            android:id="@+id/Find_Phone"
            android:hint="请输入手机号码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_weight="0.7"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:background="@mipmap/message">
        </TextView>

        <EditText
            android:id="@+id/Find_SMS"
            android:hint="请输入验证码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_weight="3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            >
        </EditText>

        <ImageView
            android:id="@+id/Find_Image"
            android:gravity="center"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:textSize="20dp"
            android:layout_height="50dp"
            android:background="@color/white">
        </ImageView>
    </LinearLayout>

    <LinearLayout
        android:paddingHorizontal="15dp"
        android:paddingTop="20dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:background="@mipmap/password">
        </TextView>

        <EditText
            android:id="@+id/Find_Password"
            android:hint="请输入密码"
            android:textSize="25dp"
            android:theme="@style/MyEditText"
            android:fontFamily="sans-serif-condensed-medium"
            android:textColorHint="#B0BEC5"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            >
        </EditText>
    </LinearLayout>

    <TextView
        android:id="@+id/Findword"
        android:layout_marginTop="10dp"
        android:layout_gravity="center"
        android:background="@mipmap/queren"
        android:layout_width="80dp"
        android:layout_height="80dp">
    </TextView>

    <TextView
        android:id="@+id/Login_Go"
        android:layout_marginRight="35dp"
        android:text="去登陆"
        android:textSize="25dp"
        android:textColor="#ECEFF1"
        android:gravity="end"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </TextView>
</LinearLayout>

•  实现代码

package com.example.application.activity;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.application.R;
import com.example.application.tool.Code;
import com.example.application.tool.Suit;
import com.example.application.tool.User;

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;
import cn.bmob.v3.listener.UpdateListener;

public class Findpassword extends AppCompatActivity implements View.OnClickListener {

    private static final String TAG = null;
    private EditText find_phone;//手机号码
    private EditText find_sms;//验证码
    private EditText find_password;//重设密码
    private ImageView find_image;//验证码图片
    private TextView findword;//完成
    private TextView login_go;//去登陆
    private String realCode;
    private String phone;
    private String sms;
    private String password;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_findpassword);
        Bmob.initialize(this,"ebb1d24c01600c55b1e8be7f2625d7a7");
        initView();
    }

    //初始化控件
    private void initView() {
        //控件变量
        find_phone = findViewById(R.id.Find_Phone);
        find_sms = findViewById(R.id.Find_SMS);
        find_password = findViewById(R.id.Find_Password);
        find_image = findViewById(R.id.Find_Image);
        findword = findViewById(R.id.Findword);
        login_go = findViewById(R.id.Login_Go);

        //监听机制
        find_image.setImageBitmap(Code.getInstance().createBitmap());
        realCode = Code.getInstance().getCode().toLowerCase();
        find_image.setOnClickListener(this);
        findword.setOnClickListener(this);
        login_go.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.Find_Image:
                find_image.setImageBitmap(Code.getInstance().createBitmap());
                realCode = Code.getInstance().getCode().toLowerCase();
                Log.v(TAG,"realCode"+realCode);
                break;
            case R.id.Findword:
                Getdata();
                //判断不能为空
                if (TextUtils.isEmpty(phone)){
                    Toast.makeText(getApplicationContext(),"请输入手机号码",Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(password)) {
                    Toast.makeText(getApplicationContext(),"请输入密码",Toast.LENGTH_SHORT).show();
                } else if (TextUtils.isEmpty(sms)) {
                    Toast.makeText(getApplicationContext(),"请输入验证码",Toast.LENGTH_SHORT).show();
                } else if (Suit.PhoneSuit(phone.trim()) != true) {
                    Toast.makeText(getApplicationContext(),"请输入正确的手机号码",Toast.LENGTH_SHORT).show();
                } else if (Suit.PasswordSuit(password.trim()) != true) {
                    Toast.makeText(getApplicationContext(),"密码最少包含3个字母",Toast.LENGTH_SHORT).show();
                } else if (password.length() < 6) {
                    Toast.makeText(getApplicationContext(),"密码不得少于6位数",Toast.LENGTH_SHORT).show();
                } else if (password.length() > 16) {
                    Toast.makeText(getApplicationContext(), "密码不得多于16位数", Toast.LENGTH_SHORT).show();
                }else {
                    BmobQuery<User> bmobQuery = new BmobQuery<>();
                    bmobQuery.findObjects(new FindListener<User>() {
                        @Override
                        public void done(List<User> object, BmobException e) {
                            if (e == null){
                                int count = 0;//判断是否查询到尾--遍历
                                //查询判断用户是否已经存在
                                for (User user : object){
                                    if (user.getAcctount().equals(phone)){
                                        Toast.makeText(getApplicationContext(),"该用户存在",Toast.LENGTH_SHORT).show();
                                        //判断验证码是否正确
                                        if (sms.equals(realCode)) {
                                            //云端数据更新
                                            User user1 = new User();
                                            user1.setPassword(password);
                                            user1.update(user.getObjectId(), new UpdateListener() {
                                                @Override
                                                public void done(BmobException e) {
                                                    if (e == null) {
                                                        Toast.makeText(getApplicationContext(),"密码修改成功",Toast.LENGTH_SHORT).show();
                                                    }else {
                                                        Toast.makeText(getApplicationContext(),"修改失败"+"\n"+"错误代码："+e.getErrorCode(),Toast.LENGTH_LONG).show();
                                                    }
                                                }
                                            });
                                            finish();
                                            break;
                                        }else {
                                            find_sms.setText("");
                                            Toast.makeText(getApplicationContext(), "验证码错误", Toast.LENGTH_SHORT).show();
                                        }
                                    }
                                    count++;
                                }
                                //查询到尾没有
                                if (count >= object.size()){
                                    Toast.makeText(getApplicationContext(),"该用户不存在",Toast.LENGTH_SHORT).show();
                                }
                            }else {
                                Toast.makeText(getApplicationContext(),"该用户不存在",Toast.LENGTH_SHORT).show();
                            }
                        }
                    });
                }
                break;
            case R.id.Login_Go:
                finish();
                break;
        }
    }

    //获取输入的数据
    private void Getdata() {
        phone = find_phone.getText().toString().trim();
        sms = find_sms.getText().toString().toLowerCase();
        password = find_password.getText().toString().trim();
    }
}

 四、想法反馈代码

• 布局代码

<?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"
    tools:context=".activity.First_interface">

    <EditText
        android:id="@+id/Idea"
        android:paddingTop="20dp"
        android:paddingHorizontal="20dp"
        android:hint="请输入您的想法"
        android:gravity="left"
        android:textSize="30dp"
        android:background="@null"
        android:textColorHint="#B0BEC5"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="13">
    </EditText>

    <Button
        android:id="@+id/submit"
        android:text="提交"
        android:gravity="center|bottom"
        android:textSize="30dp"
        android:background="#2196F3"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
    </Button>
</LinearLayout>

• 实现代码

  package com.example.application.activity;
  
  import androidx.appcompat.app.AppCompatActivity;
  
  import android.content.Intent;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.Button;
  import android.widget.EditText;
  import android.widget.Toast;
  
  import com.example.application.R;
  import com.example.application.tool.User;
  
  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;
  import cn.bmob.v3.listener.SaveListener;
  import cn.bmob.v3.listener.UpdateListener;
  
  public class First_interface extends AppCompatActivity implements View.OnClickListener {
  
      private EditText idea;//编辑框
      private Button submit;//提交按钮
      private String context;//编辑框内容
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_first_interface);
          Bmob.initialize(this,"ebb1d24c01600c55b1e8be7f2625d7a7");
          initView();
      }
  
      //初始化控件
      private void initView() {
          //定义控件
          idea = findViewById(R.id.Idea);
          submit = findViewById(R.id.submit);
  
          //监听
          submit.setOnClickListener(this);
      }
  
      public void Getdata(){
          context = idea.getText().toString().trim();
      }
  
      @Override
      public void onClick(View view) {
          switch (view.getId()){
              case R.id.submit:
                  Getdata();
                  //传递对象
                  Intent intent = getIntent();
                  User user = (User) intent.getSerializableExtra("User");
                  BmobQuery<User> bmobQuery = new BmobQuery<>();
                  bmobQuery.findObjects(new FindListener<User>() {
                      @Override
                      public void done(List<User> list, BmobException e) {
                          if(e == null){
                              System.out.println("1");
                              for (User user1 : list) {
                                  //查询到一样
                                  if(user.getAcctount().equals(user1.getAcctount())){
                                      //向云端提交数据
                                      user1.setContext(context);
                                      user1.update(user1.getObjectId(), new UpdateListener() {
                                          @Override
                                          public void done(BmobException e) {
                                              if (e == null){
                                                  Toast.makeText(First_interface.this, "提交成功", Toast.LENGTH_SHORT).show();
                                              }else {
                                                  Toast.makeText(First_interface.this, "提交失败", Toast.LENGTH_SHORT).show();
                                              }
                                          }
                                      });
                                      break;
                                  }
                              }
                          }
                      }
                  });
                  break;
          }
      }
  }

  ---

          至此，本期项目已经全部实现，尚有不足之处，后续将继续完善补充，欢迎各位下载试玩！