Android 手机内部验证码
2017-03-03 本文已影响97人
那个唐僧
此为手机内部验证码,不是本人自己创作,因为时间紧张,拉别人的demo.在此感谢那位兄弟..那位兄弟注释写的很详细,能够一目了然.所以就不用重复造轮子了.
gif图片没时间截取了,按照此代码复用即可实现.
首先自定义属性
<declare-styleable name="VerifyCode">
<attr name="codeTextSize" format="dimension"/>
<attr name="codeBackground" format="color"/>
<attr name="codeLength" format="integer"/>
<attr name="isContainChar" format="boolean"/>
<attr name="pointNum" format="integer"/>
<attr name="linNum" format="integer"/>
</declare-styleable>
其次布局
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:VerifyCode="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="com.scc.yanzhengma.MainActivity">
<com.scc.yanzhengma.VerifyCode
android:id="@+id/VerifyCode"
android:layout_width="100dp"
android:layout_height="50dp"
VerifyCode:codeLength="4"
VerifyCode:codeTextSize="18sp"
VerifyCode:isContainChar="false"
VerifyCode:linNum="10"
VerifyCode:pointNum="10"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="click"
android:text="点击刷新验证码"
android:textSize="25sp"
/>
<EditText
android:id="@+id/et_code"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="输入验证码"
android:textSize="25sp"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="check"
android:text="点击验证"
android:textSize="25sp"
/>
</LinearLayout>
再次自定义View类
package com.scc.yanzhengma;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import java.util.Random;
/**
* 类描述:自定义验证码
* 创建者：lb
*/
public class VerifyCode extends View {
private String mCodeText;//文本内容
private int mCodeTextSize;//文本大小
private int mCodeLength;//验证码长度
private int mCodeBackground;//背景色
private boolean isContainChar;//验证码是否包含字母
private int mPointNum;//干扰点数
private int mLineNum;//干扰线数
private Paint mPaint;//画笔
private Rect mBound;//绘制范围
private Bitmap bitmap;//验证码图片
private static Random mRandom = new Random();
private static int mWidth;//控件的宽度
private static int mHeight;//控件的高度
public VerifyCode(Context context) {
super(context);
}
public VerifyCode(Context context, AttributeSet attrs) {
super(context, attrs);
initAttrValues(context,attrs);
initData();
}
/**
* 初始化属性集合
* @param context
* @param attrs
*/
private void initAttrValues(Context context, AttributeSet attrs){
// //获取在AttributeSet中定义的 VerifyCode 中声明的属性的集合
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.VerifyCode);
//获取TypeArray的长度
int count=typedArray.getIndexCount();
for (int i=0;i<count;i++){
//获取此项属性的ID
int index=typedArray.getIndex(i);
switch (index){
case R.styleable.VerifyCode_codeTextSize:
// 默认设置为16sp，TypeValue类 px转sp 一个转换类
mCodeTextSize =typedArray.getDimensionPixelSize(index,(int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 16, getResources().getDisplayMetrics()));
break;
case R.styleable.VerifyCode_codeBackground:
mCodeBackground=typedArray.getColor(index,Color.WHITE);
break;
case R.styleable.VerifyCode_codeLength:
mCodeLength=typedArray.getInteger(index,4);
break;
case R.styleable.VerifyCode_isContainChar:
isContainChar=typedArray.getBoolean(index,false);
break;
case R.styleable.VerifyCode_pointNum:
mPointNum=typedArray.getInteger(index,100);
break;
case R.styleable.VerifyCode_linNum:
mLineNum=typedArray.getInteger(index,3);
break;
}
}
//Recycles the TypedArray, to be re-used by a later caller
//官方解释：回收TypedArray 以便后面的使用者重用
typedArray.recycle();
}
/**
* 初始化数据
*/
private void initData(){
mCodeText=getValidationCode(mCodeLength,isContainChar);
mPaint=new Paint();
mPaint.setAntiAlias(true);
mBound=new Rect();
//计算文字所在矩形，可以得到宽高
mPaint.getTextBounds(mCodeText,0, mCodeText.length(),mBound);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//获取控件宽高的显示模式
int widthMode=MeasureSpec.getMode(widthMeasureSpec);
int heightMode=MeasureSpec.getMode(heightMeasureSpec);
//获取宽高的尺寸值 固定值的宽度
int widthSize=MeasureSpec.getSize(widthMeasureSpec);
int heightSize=MeasureSpec.getSize(heightMeasureSpec);
//设置宽高默认为建议的最小宽高
int width= getDefaultSize(getSuggestedMinimumWidth(),widthMeasureSpec) ;
int height=getDefaultSize(getSuggestedMinimumHeight(),heightMeasureSpec);
// MeasureSpec父布局传递给后代的布局要求 包含 确定大小和三种模式
// EXACTLY：一般是设置了明确的值或者是MATCH_PARENT
// AT_MOST：表示子布局限制在一个最大值内，一般为WARP_CONTENT
// UNSPECIFIED：表示子布局想要多大就多大，很少使用
if (widthMode==MeasureSpec.EXACTLY){
width=widthSize;
}else{
mPaint.setTextSize(mCodeTextSize);
mPaint.getTextBounds(mCodeText,0,mCodeText.length(),mBound);
float textWidth=mBound.width();
int tempWidth=(int)(getPaddingLeft()+textWidth+getPaddingRight());
width=tempWidth;
}
if (heightMode == MeasureSpec.EXACTLY)
{
height = heightSize;
} else
{
mPaint.setTextSize(mCodeTextSize);
mPaint.getTextBounds(mCodeText, 0, mCodeText.length(), mBound);
float textHeight = mBound.height();
int tempHeight = (int) (getPaddingTop() + textHeight + getPaddingBottom());
height = tempHeight;
}
//设置测量的宽高
setMeasuredDimension(width,height);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mWidth=getWidth();
mHeight=getHeight();
if (bitmap==null){
bitmap=createBitmapValidate();
}
canvas.drawBitmap(bitmap,0,0,mPaint);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()){
case MotionEvent.ACTION_DOWN:
refresh();
break;
}
return super.onTouchEvent(event);
}
/**
* 创建图片验证码
* @return
*/
private Bitmap createBitmapValidate(){
if(bitmap != null && !bitmap.isRecycled()){
//回收并且置为null
bitmap.recycle();
bitmap = null;
}
//创建图片
Bitmap sourceBitmap=Bitmap.createBitmap(mWidth,mHeight, Bitmap.Config.ARGB_8888);
//创建画布
Canvas canvas=new Canvas(sourceBitmap);
//画上背景颜色
canvas.drawColor(mCodeBackground);
//初始化文字画笔
mPaint.setStrokeWidth(3f);
mPaint.setTextSize(mCodeTextSize);
//测量验证码字符串显示的宽度值
float textWidth=mPaint.measureText(mCodeText);
//画上验证码
int length = mCodeText.length();
//计算一个字符的所占位置
float charLength = textWidth / length;
for (int i = 1; i <= length; i++) {
int offsetDegree = mRandom.nextInt(15);
//这里只会产生0和1，如果是1那么正旋转正角度，否则旋转负角度
offsetDegree = mRandom.nextInt(2) == 1 ? offsetDegree : -offsetDegree;
//用来保存Canvas的状态。save之后，可以调用Canvas的平移、放缩、旋转、错切、裁剪等操作。
canvas.save();
//设置旋转
canvas.rotate(offsetDegree, mWidth / 2, mHeight / 2);
//给画笔设置随机颜色
mPaint.setARGB(255, mRandom.nextInt(200) + 20, mRandom.nextInt(200) + 20,
mRandom.nextInt(200) + 20);
//设置字体的绘制位置
canvas.drawText(String.valueOf(mCodeText.charAt(i - 1)), (i - 1) * charLength+5,
mHeight * 4 / 5f, mPaint);
//用来恢复Canvas之前保存的状态。防止save后对Canvas执行的操作对后续的绘制有影响。
canvas.restore();
}
//重新设置画笔
mPaint.setARGB(255, mRandom.nextInt(200) + 20, mRandom.nextInt(200) + 20,
mRandom.nextInt(200) + 20);
mPaint.setStrokeWidth(1);
//产生干扰效果1 －－ 干扰点
for (int i = 0; i < mPointNum; i++) {
drawPoint(canvas, mPaint);
}
//生成干扰效果2 －－ 干扰线
for (int i = 0; i < mLineNum; i++) {
drawLine(canvas, mPaint);
}
return sourceBitmap;
}
/**
* 生成干扰点
*/
private static void drawPoint(Canvas canvas, Paint paint) {
PointF pointF = new PointF(mRandom.nextInt(mWidth) + 10, mRandom.nextInt(mHeight) + 10);
canvas.drawPoint(pointF.x, pointF.y, paint);
}
/**
* 生成干扰线
*/
private static void drawLine(Canvas canvas, Paint paint) {
int startX = mRandom.nextInt(mWidth);
int startY = mRandom.nextInt(mHeight);
int endX = mRandom.nextInt(mWidth);
int endY = mRandom.nextInt(mHeight);
canvas.drawLine(startX, startY, endX, endY, paint);
}
/**
* 获取验证码
*
* @param length 生成随机数的长度
* @param contains 是否包含字符串
* @return
*/
public String getValidationCode(int length,boolean contains) {
String val = "";
Random random = new Random();
for (int i = 0; i < length; i++) {
if (contains){
//字母或数字
String code = random.nextInt(2) % 2 == 0 ? "char" : "num";
//字符串
if ("char".equalsIgnoreCase(code)) {
//大写或小写字母
int choice = random.nextInt(2) % 2 == 0 ? 65 : 97;
val += (char) (choice + random.nextInt(26));
} else if ("num".equalsIgnoreCase(code)) {
val += String.valueOf(random.nextInt(10));
}
}else{
val += String.valueOf(random.nextInt(10));
}
}
return val;
}
/**
*判断验证码是否一致 忽略大小写
*/
public Boolean isEqualsIgnoreCase(String CodeString) {
return mCodeText.equalsIgnoreCase(CodeString);
}
/**
* 判断验证码是否一致 不忽略大小写
*/
public Boolean isEquals(String CodeString) {
return mCodeText.equals(CodeString);
}
/**
* 提供外部调用的刷新方法
*/
public void refresh(){
mCodeText= getValidationCode(mCodeLength,isContainChar);
bitmap = createBitmapValidate();
invalidate();
}
}
在MainActivity中调用
public class MainActivity extends AppCompatActivity {
private EditText code;
private VerifyCode mVerifyCode;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
code = (EditText) findViewById(R.id.et_code);
mVerifyCode = (VerifyCode) findViewById(R.id.VerifyCode);
}
public void click(View view) {
mVerifyCode.refresh();
}
public void check(View view) {
String s = code.getText().toString();
Boolean aBoolean = mVerifyCode.isEquals(s);
if (aBoolean) {
Toast.makeText(this, "OKOKOKOKOKOKOKOKOKOKOK", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "NONONONONONONOONONONO", Toast.LENGTH_SHORT).show();
}
}
}
