├── .gitignore ├── .idea ├── compiler.xml ├── copyright │ └── profiles_settings.xml ├── misc.xml ├── modules.xml ├── vcs.xml └── workspace.xml ├── LICENSE ├── README.md ├── build.gradle ├── proguard-rules.pro ├── src ├── androidTest │ └── java │ │ └── com │ │ └── bob │ │ └── verifycode │ │ └── ApplicationTest.java └── main │ ├── AndroidManifest.xml │ ├── java │ └── com │ │ └── bob │ │ └── verifycode │ │ ├── sample │ │ └── MainActivity.java │ │ └── utils │ │ ├── BaseVerify.java │ │ ├── IVerify.java │ │ └── LogicVerify.java │ └── res │ ├── layout │ └── activity_main.xml │ ├── menu │ └── menu_main.xml │ ├── mipmap-hdpi │ └── ic_launcher.png │ ├── mipmap-mdpi │ └── ic_launcher.png │ ├── mipmap-xhdpi │ └── ic_launcher.png │ ├── mipmap-xxhdpi │ └── ic_launcher.png │ ├── values-w820dp │ └── dimens.xml │ └── values │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml └── verifycode.iml /.gitignore: -------------------------------------------------------------------------------- 1 | # Built application files 2 | *.apk 3 | *.ap_ 4 | 5 | # Files for the Dalvik VM 6 | *.dex 7 | 8 | # Java class files 9 | *.class 10 | 11 | # Generated files 12 | bin/ 13 | gen/ 14 | 15 | # Gradle files 16 | .gradle/ 17 | build/ 18 | /*/build/ 19 | 20 | # Local configuration file (sdk path, etc) 21 | local.properties 22 | 23 | # Proguard folder generated by Eclipse 24 | proguard/ 25 | 26 | # Log Files 27 | *.log 28 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /.idea/copyright/profiles_settings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /.idea/misc.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 26 | 27 | 28 | 29 | 30 | 31 | 36 | 37 | 38 | 39 | 40 | 41 | -------------------------------------------------------------------------------- /.idea/modules.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/vcs.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | -------------------------------------------------------------------------------- /.idea/workspace.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 14 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 23 | 26 | 27 | 28 | 29 | 30 | 31 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 78 | 79 | 80 | 81 | 95 | 96 | 97 | 98 | 99 | 100 | 107 | 108 | 109 | 110 | 128 | 135 | 136 | 144 | 145 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 1429325276300 156 | 159 | 160 | 161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 192 | 195 | 196 | 197 | 199 | 200 | 201 | 202 | 203 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # VerificationCode 2 | 随机生成多种方式验证码的实现
3 | 这里主要实现了基本随机验证码BaseVerify和带有逻辑运算的简单验证码LogicVerify
4 | ##Usage 5 | ###setp1
6 | 在你的布局文件中对应的地方定义一个空的ImageView
7 | ###setp2
8 | 在程序中利用调用对应验证方法getInstance()获取实例赋给接口引用变量
9 | ###setp3
10 | 控件.setImageBitmap(接口引用变量.createBitmap())；来为ImageView实例化位图对象以及重新获取验证码
11 | 12 | ##效果图 13 | ![](https://github.com/Bob1993/ImageCache/blob/master/Images/1.gif) 14 | 15 | ##About me 16 | I am a grade three student in USTL.
17 | I'm willing to solve the problem with java,Cplus,C. I fell in love with android last year and I will devote myself to android when I graduate from school. If you have an internship for android,please contact me .
18 | 19 | [My blog](http://blog.csdn.net/bob1993_Dev) 20 | -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 22 5 | buildToolsVersion "22.0.0" 6 | 7 | defaultConfig { 8 | applicationId "com.bob.verifycode" 9 | minSdkVersion 14 10 | targetSdkVersion 21 11 | versionCode 1 12 | versionName "1.0" 13 | } 14 | buildTypes { 15 | release { 16 | minifyEnabled false 17 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 18 | } 19 | } 20 | } 21 | 22 | dependencies { 23 | compile fileTree(dir: 'libs', include: ['*.jar']) 24 | compile 'com.android.support:appcompat-v7:22.0.0' 25 | } 26 | -------------------------------------------------------------------------------- /proguard-rules.pro: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /home/bob/Java_tools/sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the proguardFiles 5 | # directive in build.gradle. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} 18 | -------------------------------------------------------------------------------- /src/androidTest/java/com/bob/verifycode/ApplicationTest.java: -------------------------------------------------------------------------------- 1 | package com.bob.verifycode; 2 | 3 | import android.app.Application; 4 | import android.test.ApplicationTestCase; 5 | 6 | /** 7 | * Testing Fundamentals 8 | */ 9 | public class ApplicationTest extends ApplicationTestCase { 10 | public ApplicationTest() { 11 | super(Application.class); 12 | } 13 | } -------------------------------------------------------------------------------- /src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 10 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | -------------------------------------------------------------------------------- /src/main/java/com/bob/verifycode/sample/MainActivity.java: -------------------------------------------------------------------------------- 1 | package com.bob.verifycode.sample; 2 | 3 | import android.app.Activity; 4 | import android.graphics.Color; 5 | import android.os.Bundle; 6 | import android.text.Editable; 7 | import android.text.TextWatcher; 8 | import android.view.View; 9 | import android.view.View.*; 10 | import android.widget.Button; 11 | import android.widget.EditText; 12 | import android.widget.ImageView; 13 | import android.widget.TextView; 14 | 15 | import com.bob.verifycode.R; 16 | import com.bob.verifycode.utils.BaseVerify; 17 | import com.bob.verifycode.utils.IVerify; 18 | import com.bob.verifycode.utils.LogicVerify; 19 | 20 | 21 | public class MainActivity extends Activity implements OnClickListener { 22 | 23 | private Button bt_change; 24 | private View bt_check; 25 | private EditText et_verify; 26 | private ImageView verify_img; 27 | private TextView tv_check; 28 | private IVerify vCode; 29 | 30 | @Override 31 | protected void onCreate(Bundle savedInstanceState) { 32 | super.onCreate(savedInstanceState); 33 | setContentView(R.layout.activity_main); 34 | bt_change = (Button) findViewById(R.id.bt_change); 35 | bt_check = findViewById(R.id.bt_check);//在这里只需要强转一次就够了？？？ 36 | verify_img = (ImageView) findViewById(R.id.img_verify); 37 | et_verify = (EditText) findViewById(R.id.et_verify); 38 | tv_check = (TextView) findViewById(R.id.tv_Check); 39 | vCode = LogicVerify.getInstance(); 40 | 41 | verify_img.setImageBitmap(vCode.createBitmap()); 42 | 43 | bt_change.setOnClickListener(this); 44 | bt_check.setOnClickListener(this); 45 | et_verify.addTextChangedListener(new TextWatcher() {//对EditText进行监听,监听改变tv_check状态 46 | @Override 47 | public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { 48 | tv_check.setVisibility(View.GONE); 49 | } 50 | 51 | @Override 52 | public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { 53 | 54 | } 55 | 56 | @Override 57 | public void afterTextChanged(Editable editable) { 58 | 59 | } 60 | }); 61 | } 62 | 63 | @Override 64 | public void onClick(View view) { 65 | switch (view.getId()) { 66 | case R.id.bt_change://更换一张验证码 67 | verify_img.setImageBitmap(vCode.createBitmap()); 68 | break; 69 | case R.id.bt_check: {//校验 70 | if (vCode.checkCode(et_verify.getText().toString())) { 71 | tv_check.setTextColor(Color.GREEN); 72 | tv_check.setText("验证成功"); 73 | tv_check.setVisibility(View.VISIBLE); 74 | } else { 75 | tv_check.setTextColor(Color.RED); 76 | tv_check.setText("验证码错误"); 77 | tv_check.setVisibility(View.VISIBLE); 78 | } 79 | } 80 | } 81 | } 82 | } 83 | -------------------------------------------------------------------------------- /src/main/java/com/bob/verifycode/utils/BaseVerify.java: -------------------------------------------------------------------------------- 1 | package com.bob.verifycode.utils; 2 | 3 | import android.graphics.Bitmap; 4 | import android.graphics.Bitmap.Config; 5 | import android.graphics.Canvas; 6 | import android.graphics.Color; 7 | import android.graphics.Paint; 8 | import android.text.TextUtils; 9 | 10 | import java.util.Random; 11 | 12 | /** 13 | * 基本的随机验证码验证 14 | */ 15 | public class BaseVerify implements IVerify{ 16 | 17 | private static final char[] CHARS = {//定义随机字符集 18 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 19 | 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 20 | 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 21 | 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 22 | 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' 23 | }; 24 | 25 | private static BaseVerify vCode; 26 | 27 | public static BaseVerify getInstance() {//单例模式获取验证码对象 28 | if (vCode == null) 29 | vCode = new BaseVerify(); 30 | return vCode; 31 | } 32 | 33 | // width="60" height="30" 34 | // base_padding_left="5" 35 | // range_padding_left="10" 36 | // base_padding_top="15" 37 | // range_padding_top="10" 38 | // codeLength="4" 39 | // line_number="3" 40 | // font_size="20" 41 | 42 | //验证码固定参数，也就是将会用到的几个常量 43 | private static final int DEFAULT_CODE_LENGTH = 4;//默认的代码长度，也就是会出现４个随机码 44 | private static final int DEFAULT_FONT_SIZE = 20;//字体大小 45 | private static final int DEFAULT_LINE_NUMBER = 3;//默认的用于干扰视线直线的条数 46 | private static final int BASE_PADDING_LEFT = 10, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 20, RANGE_PADDING_TOP = 10; 47 | /** 48 | * 上边4个整型数的解释： 49 | * BASE_PADDING_LEFT,BASE_PADDING_TOP 表示每一个将要画出字符坐标计算的基准 50 | * RANGE_PADDING_LEFT,RANGE_PADDING_TOP 表示字符坐标x,y的变化范围 51 | */ 52 | private static final int DEFAULT_WIDTH = 100, DEFAULT_HEIGHT = 30; 53 | //设置位图宽高，具体的宽高取ImageView和BitMap之间较小的一个， 54 | // 即就是宽= min{ImageView.Width,Bitmap.Width},高同理 55 | //注意：当我们需要一个不同尺寸的验证码图片，不仅仅需要修改DEFAULT_WIDTH 和DEFAULT_HEIGHT,为了显示效果 56 | //的最佳化，最好将上述的4个坐标值也调整一下，使得我们的验证码能最恰当地占据整个底板 57 | 58 | //将一些常量应用到本类的成员变量上 59 | //settings decided by the layout xml 60 | //canvas width and height 61 | private int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT; 62 | 63 | //random word space and pading_top 64 | private int base_padding_left = BASE_PADDING_LEFT, range_padding_left = RANGE_PADDING_LEFT, 65 | base_padding_top = BASE_PADDING_TOP, range_padding_top = RANGE_PADDING_TOP; 66 | 67 | //number of chars, lines; font size 68 | private int codeLength = DEFAULT_CODE_LENGTH, line_number = DEFAULT_LINE_NUMBER, font_size = DEFAULT_FONT_SIZE; 69 | 70 | //variables 71 | private String code;//存储随机生成的随机码序列 72 | private int padding_left, padding_top;//左边框间距和上边框间距 73 | private Random random = new Random();//随机数生成器 74 | 75 | public Bitmap createBitmap() {//得到位图对象 76 | 77 | padding_left = 0;//设置位图左内边距离 78 | 79 | Bitmap bp = Bitmap.createBitmap(width, height, Config.ARGB_8888);//创建位图 80 | /** 81 | * 位图最后一个设置参数的简介 82 | * A：透明度 83 | * R：红色 84 | * G：绿 85 | * B：蓝 86 | * Bitmap.Config ARGB_4444：每个像素占四位，即A=4，R=4，G=4，B=4，那么一个像素点占4+4+4+4=16位 87 | * Bitmap.Config ARGB_8888：每个像素占四位，即A=8，R=8，G=8，B=8，那么一个像素点占8+8+8+8=32位 88 | * Bitmap.Config RGB_565：每个像素占四位，即R=5，G=6，B=5，没有透明度，那么一个像素点占5+6+5=16位 89 | * Bitmap.Config ALPHA_8：每个像素占四位，只有透明度，没有颜色。 90 | * 一般情况下我们都是使用的ARGB_8888，由此可知它是最占内存的，因为一个像素占32位，8位=1字节，所以一个像素占4字节的内存。假设有一张480x800的图片，如果格式为ARGB_8888，那么将会占用1500KB的内存 91 | */ 92 | 93 | Canvas c = new Canvas(bp);//以创建好的空位图创建画布 94 | 95 | code = createCode();//生成目标字符串 96 | 97 | c.drawColor(Color.WHITE); 98 | Paint paint = new Paint();//创建画笔 99 | paint.setTextSize(font_size);//设置画笔的字体大小 100 | 101 | for (int i = 0; i < code.length(); i++) {//画每一个字符 102 | randomTextStyle(paint);//随机的画笔风格 103 | randomPadding();//按照约定好的规则生成字符的坐标 104 | c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);//开始以随机的画笔和坐标画每一个字符 105 | } 106 | 107 | for (int i = 0; i < line_number; i++) {//画事先设置好数量的几条横线 108 | drawLine(c, paint); 109 | } 110 | 111 | c.save(Canvas.ALL_SAVE_FLAG);//保存在画布上的所有操作 112 | c.restore(); 113 | return bp;//返回画好的位图 114 | } 115 | 116 | /* public String getCode() { 117 | return code; 118 | }*/ 119 | 120 | private String createCode() {//随机生成随机码 121 | StringBuilder buffer = new StringBuilder(); 122 | for (int i = 0; i < codeLength; i++) {//codeLength即就是验证码字母个数 123 | buffer.append(CHARS[random.nextInt(CHARS.length)]); 124 | } 125 | return buffer.toString(); 126 | } 127 | 128 | private void drawLine(Canvas canvas, Paint paint) {//自定义的任意方向画横线的方法 129 | int color = randomColor(); 130 | int startX = random.nextInt(width); 131 | int startY = random.nextInt(height); 132 | int stopX = random.nextInt(width); 133 | int stopY = random.nextInt(height); 134 | paint.setStrokeWidth(1);//设置画笔粗细 135 | paint.setColor(color);//颜色 136 | canvas.drawLine(startX, startY, stopX, stopY, paint); 137 | } 138 | 139 | private int randomColor() { 140 | return randomColor(1); 141 | }//随机生成颜色 142 | 143 | private int randomColor(int rate) { 144 | int red = random.nextInt(256) / rate; 145 | int green = random.nextInt(256) / rate; 146 | int blue = random.nextInt(256) / rate; 147 | return Color.rgb(red, green, blue); 148 | } 149 | 150 | private void randomTextStyle(Paint paint) {//随机的字体风格 151 | int color = randomColor();//颜色 152 | paint.setColor(color); 153 | paint.setFakeBoldText(random.nextBoolean()); //粗细；true为粗体，false为非粗体 154 | float skewX = random.nextInt(11) / 10; 155 | skewX = random.nextBoolean() ? skewX : -skewX; 156 | paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜 157 | // paint.setUnderlineText(true); //true为下划线，false为非下划线 158 | // paint.setStrikeThruText(true); //true为删除线，false为非删除线 159 | } 160 | 161 | /** 162 | * 随机定义每一个字符所绘画的坐标，注意：在这里padding_left是具有叠加效果的， 163 | * 也就是说所画的字符越往后，坐标也就越大，而top永远就是base+range 164 | */ 165 | private void randomPadding() { 166 | padding_left += base_padding_left + random.nextInt(range_padding_left); 167 | padding_top = base_padding_top + random.nextInt(range_padding_top); 168 | } 169 | 170 | public boolean checkCode(String input) {//验证码校验 171 | 172 | input= input.trim();if(TextUtils.equals("", input))//空输入判为错 173 | return false; 174 | 175 | if (input.equalsIgnoreCase(code)) { 176 | return true; 177 | } else { 178 | return false; 179 | } 180 | } 181 | } 182 | -------------------------------------------------------------------------------- /src/main/java/com/bob/verifycode/utils/IVerify.java: -------------------------------------------------------------------------------- 1 | package com.bob.verifycode.utils; 2 | 3 | import android.graphics.Bitmap; 4 | 5 | /** 6 | * Created by bob on 15-4-18. 7 | */ 8 | public interface IVerify { 9 | public boolean checkCode(String input); 10 | public Bitmap createBitmap(); 11 | } 12 | -------------------------------------------------------------------------------- /src/main/java/com/bob/verifycode/utils/LogicVerify.java: -------------------------------------------------------------------------------- 1 | package com.bob.verifycode.utils; 2 | 3 | import android.graphics.Bitmap; 4 | import android.graphics.Bitmap.Config; 5 | import android.graphics.Canvas; 6 | import android.graphics.Color; 7 | import android.graphics.Paint; 8 | import android.text.TextUtils; 9 | import android.util.Log; 10 | 11 | import java.util.Random; 12 | 13 | /** 14 | * 具有逻辑算术的验证方法 15 | */ 16 | public class LogicVerify implements IVerify { 17 | 18 | int result; 19 | private static final char[] CHARS = {//定义随机字符集 20 | '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 21 | '零', '一', '二', '三', '四', '五', '六', '七', '八', '九' 22 | }; 23 | 24 | private static final String[] OPERATORS = {//定义随机字符集 25 | "加上", "减去", "乘以", "除以", "+", "-", "×", "÷" 26 | }; 27 | 28 | private static LogicVerify vCode; 29 | 30 | public static LogicVerify getInstance() {//单例模式获取验证码对象 31 | if (vCode == null) 32 | vCode = new LogicVerify(); 33 | return vCode; 34 | } 35 | 36 | // width="60" height="30" 37 | // base_padding_left="5" 38 | // range_padding_left="10" 39 | // base_padding_top="15" 40 | // range_padding_top="10" 41 | // codeLength="4" 42 | // line_number="3" 43 | // font_size="20" 44 | 45 | //验证码固定参数，也就是将会用到的几个常量 46 | private static final int DEFAULT_FONT_SIZE = 20;//字体大小 47 | private static final int DEFAULT_LINE_NUMBER = 3;//默认的用于干扰视线直线的条数 48 | private static final int BASE_PADDING_LEFT = 10, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 20, RANGE_PADDING_TOP = 10; 49 | /** 50 | * 上边4个整型数的解释： 51 | * BASE_PADDING_LEFT,BASE_PADDING_TOP 表示每一个将要画出字符坐标计算的基准 52 | * RANGE_PADDING_LEFT,RANGE_PADDING_TOP 表示字符坐标x,y的变化范围 53 | */ 54 | private static final int DEFAULT_WIDTH = 100, DEFAULT_HEIGHT = 30; 55 | //设置位图宽高，具体的宽高取ImageView和BitMap之间较小的一个， 56 | // 即就是宽= min{ImageView.Width,Bitmap.Width},高同理 57 | //注意：当我们需要一个不同尺寸的验证码图片，不仅仅需要修改DEFAULT_WIDTH 和DEFAULT_HEIGHT,为了显示效果 58 | //的最佳化，最好将上述的4个坐标值也调整一下，使得我们的验证码能最恰当地占据整个底板 59 | 60 | //将一些常量应用到本类的成员变量上 61 | //settings decided by the layout xml 62 | //canvas width and height 63 | private int width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT; 64 | 65 | //random word space and pading_top 66 | private int base_padding_left = BASE_PADDING_LEFT, range_padding_left = RANGE_PADDING_LEFT, 67 | base_padding_top = BASE_PADDING_TOP, range_padding_top = RANGE_PADDING_TOP; 68 | 69 | //number of chars, lines; font size 70 | private int line_number = DEFAULT_LINE_NUMBER, font_size = DEFAULT_FONT_SIZE; 71 | 72 | //variables 73 | private String code;//存储随机生成的随机码序列 74 | private int padding_left, padding_top;//左边框间距和上边框间距 75 | private Random random = new Random();//随机数生成器 76 | 77 | public Bitmap createBitmap() {//得到位图对象 78 | 79 | padding_left = 0;//设置位图左内边距离 80 | 81 | Bitmap bp = Bitmap.createBitmap(width, height, Config.ARGB_8888);//创建位图 82 | /** 83 | * 位图最后一个设置参数的简介 84 | * A：透明度 85 | * R：红色 86 | * G：绿 87 | * B：蓝 88 | * Bitmap.Config ARGB_4444：每个像素占四位，即A=4，R=4，G=4，B=4，那么一个像素点占4+4+4+4=16位 89 | * Bitmap.Config ARGB_8888：每个像素占四位，即A=8，R=8，G=8，B=8，那么一个像素点占8+8+8+8=32位 90 | * Bitmap.Config RGB_565：每个像素占四位，即R=5，G=6，B=5，没有透明度，那么一个像素点占5+6+5=16位 91 | * Bitmap.Config ALPHA_8：每个像素占四位，只有透明度，没有颜色。 92 | * 一般情况下我们都是使用的ARGB_8888，由此可知它是最占内存的，因为一个像素占32位，8位=1字节，所以一个像素占4字节的内存。假设有一张480x800的图片，如果格式为ARGB_8888，那么将会占用1500KB的内存 93 | */ 94 | 95 | Canvas c = new Canvas(bp);//以创建好的空位图创建画布 96 | 97 | code = createCode();//生成目标字符串 98 | 99 | c.drawColor(Color.WHITE); 100 | Paint paint = new Paint();//创建画笔 101 | paint.setTextSize(font_size);//设置画笔的字体大小 102 | 103 | for (int i = 0; i < code.length(); i++) {//画每一个字符 104 | randomTextStyle(paint);//随机的画笔风格 105 | randomPadding();//按照约定好的规则生成字符的坐标 106 | c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);//开始以随机的画笔和坐标画每一个字符 107 | } 108 | 109 | for (int i = 0; i < line_number; i++) {//画事先设置好数量的几条横线 110 | drawLine(c, paint); 111 | } 112 | 113 | c.save(Canvas.ALL_SAVE_FLAG);//保存在画布上的所有操作 114 | c.restore(); 115 | return bp;//返回画好的位图 116 | } 117 | 118 | 119 | private String createCode() {//随机生成随机码 120 | StringBuilder buffer = new StringBuilder(); 121 | buffer.append(CHARS[random.nextInt(CHARS.length)]);//获取第一个运算数 122 | buffer.append(OPERATORS[random.nextInt(OPERATORS.length)]);//获取运算符 123 | buffer.append(CHARS[random.nextInt(CHARS.length)]);//获取第二个运算数 124 | buffer.append("="); 125 | return buffer.toString(); 126 | } 127 | 128 | private void drawLine(Canvas canvas, Paint paint) {//自定义的任意方向画横线的方法 129 | int color = randomColor(); 130 | int startX = random.nextInt(width); 131 | int startY = random.nextInt(height); 132 | int stopX = random.nextInt(width); 133 | int stopY = random.nextInt(height); 134 | paint.setStrokeWidth(1);//设置画笔粗细 135 | paint.setColor(color);//颜色 136 | canvas.drawLine(startX, startY, stopX, stopY, paint); 137 | } 138 | 139 | private int randomColor() { 140 | return randomColor(1); 141 | }//随机生成颜色 142 | 143 | private int randomColor(int rate) { 144 | int red = random.nextInt(256) / rate; 145 | int green = random.nextInt(256) / rate; 146 | int blue = random.nextInt(256) / rate; 147 | return Color.rgb(red, green, blue); 148 | } 149 | 150 | private void randomTextStyle(Paint paint) {//随机的字体风格 151 | int color = randomColor();//颜色 152 | paint.setColor(color); 153 | paint.setFakeBoldText(random.nextBoolean()); //粗细；true为粗体，false为非粗体 154 | float skewX = random.nextInt(11) / 10; 155 | skewX = random.nextBoolean() ? skewX : -skewX; 156 | paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜 157 | // paint.setUnderlineText(true); //true为下划线，false为非下划线 158 | // paint.setStrikeThruText(true); //true为删除线，false为非删除线 159 | } 160 | 161 | /** 162 | * 随机定义每一个字符所绘画的坐标，注意：在这里padding_left是具有叠加效果的， 163 | * 也就是说所画的字符越往后，坐标也就越大，而top永远就是base+range 164 | */ 165 | private void randomPadding() { 166 | padding_left += base_padding_left + random.nextInt(range_padding_left); 167 | padding_top = base_padding_top + random.nextInt(range_padding_top); 168 | } 169 | 170 | public boolean checkCode(String input) {//验证码校验 171 | result = 0; 172 | input = input.trim();//除掉空格 173 | if(TextUtils.equals("", input))//空输入判为错 174 | return false; 175 | 176 | int arg1 = char2Int(code.charAt(0)); 177 | String opt = code.substring(1, code.length() - 2);//java区间遵循左闭右开原则，所以length-2取到的是倒数第二个字符 178 | int arg2 = char2Int(code.charAt(code.length() - 2)); 179 | 180 | Log.i("result", arg1 + " " + arg2); 181 | Log.i("opt", opt); 182 | 183 | switch (opt) {//计算正确结果 184 | case "加上": 185 | case "+": { 186 | result = arg1 + arg2; 187 | } 188 | break; 189 | 190 | case "减去": 191 | case "-": { 192 | result = arg1 - arg2; 193 | } 194 | break; 195 | 196 | case "乘以": 197 | case "×": { 198 | result = arg1 * arg2; 199 | } 200 | break; 201 | 202 | case "除以": 203 | case "÷": { 204 | if (arg2 == 0) 205 | result = 0; 206 | else result = arg1 / arg2; 207 | } 208 | } 209 | 210 | if (Integer.parseInt(input) == result)//如果在这里检测到异常抛出的话，容易使前边白做，因此提前 211 | return true; 212 | return false; 213 | } 214 | 215 | 216 | private int char2Int(char arg)//利用下标来转换字符 217 | { 218 | for (int i = 0; i < CHARS.length; i++) { 219 | if (CHARS[i] == arg) 220 | if (i >= 10) 221 | return i - 10; 222 | else return i; 223 | } 224 | return 0;//默认返回0 225 | } 226 | } 227 | -------------------------------------------------------------------------------- /src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 8 | 9 | 14 | 15 | 20 | 21 |