Android通过自定义View实现随机验证码

/*** 功能：用于对验证码控件参数的配置* */public class Config {// 验证码更新时间public static final int PTEDE_TIME = 1200;// 点数设置public static final int POINT_NUM = 100;// 线段数设置public static final int LINE_NUM = 2;//设置背景颜色public static final int COLOR=Color.BLUE;//随机数据长度public static int TEXT_LENGTH=4;//设置验证码字体大小public static int TEXT_SIZE=30;}2、CheckUtil组件/*** 功能：验证码相关工具类* */public class CheckUtil{/*** 产生随机数字* @return*/public static int [] getCheckNum(){int [] tempCheckNum = new int[Config.TEXT_LENGTH];for(int i = 0; i < Config.TEXT_LENGTH; i++){tempCheckNum[i] = (int) (Math.random() * 10);}return tempCheckNum;}/*** 随机产生划线的起始点坐标和结束点坐标* @param height 传入CheckView的高度值* @param width 传入CheckView的宽度值* @return 起始点坐标和结束点坐标*/public static int[] getLine(int height, int width){int [] tempCheckNum = {0,0,0,0};for(int i = 0; i < 4; i+=2){tempCheckNum[i] = (int) (Math.random() * width);tempCheckNum[i + 1] = (int) (Math.random() * height);}return tempCheckNum;}/*** 随机产生点的圆心点坐标* @param height 传入CheckView的高度值* @param width 传入CheckView的宽度值* @return*/public static int[] getPoint(int height, int width){int [] tempCheckNum = {0,0,0,0};tempCheckNum[0] = (int) (Math.random() * width);tempCheckNum[1] = (int) (Math.random() * height);return tempCheckNum;}/*** 验证是否正确* @param userCheck 用户输入的验证码* @param checkNum 验证控件产生的随机数* @return*/public static boolean checkNum(String userCheck, int[] checkNum){if(userCheck.length() != 4 ){ return false;}String checkString = "";for (int i = 0; i < 4; i++) {checkString += checkNum[i];}if(userCheck.equals(checkString)){return true;}else {return false;}}/*** 计算验证码的绘制y点位置* @param height 传入CheckView的高度值* @return*/public static int getPositon(int height){int tempPositoin = (int) (Math.random() * height);if(tempPositoin < 20){tempPositoin += 20;}return tempPositoin;}}

public class CheckView extends View{Context mContext;int [] CheckNum = null;Paint mTempPaint = new Paint();// 验证码public CheckView(Context context, AttributeSet attrs) {super(context, attrs);mContext = context;mTempPaint.setAntiAlias(true);mTempPaint.setTextSize(Config.TEXT_SIZE);mTempPaint.setStrokeWidth(3);}public void onDraw(Canvas canvas){canvas.drawColor(Config.COLOR);final int height = getHeight();//获得CheckView控件的高度final int width = getWidth();//获得CheckView控件的宽度int dx = 40;for(int i = 0; i < 4; i ++){//绘制验证控件上的文本canvas.drawText("" + CheckNum[i], dx, CheckUtil.getPositon(height), mTempPaint);dx += width/ 5;}int [] line;for(int i = 0; i < Config.LINE_NUM; i ++){//划线line = CheckUtil.getLine(height, width);canvas.drawLine(line[0], line[1], line[2], line[3], mTempPaint);}// 绘制小圆点int [] point;for(int i = 0; i < Config.POINT_NUM; i ++) {//画点point=CheckUtil.getPoint(height, width);canvas.drawCircle(point[0], point[1], 1, mTempPaint);}}public void setCheckNum(int [] chenckNum) {//设置验证码CheckNum = chenckNum;}public int[] getCheckNum() {//获得验证码return CheckNum;}public void invaliChenkNum() {invalidate();}}

public class MainActivity extends Activity implements View.OnClickListener{private CheckAction mCheckView ;private TextView mShowPassViwe;private EditText mEditPass;private Button mSubmit;private Button mRef;// 验证码：private int [] checkNum =null;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main); initView();initCheckNum();}public void initView(){mCheckView = (CheckView) findViewById(R.id.checkView);mShowPassViwe = (TextView) findViewById(R.id.checkpass);mEditPass = (EditText) findViewById(R.id.checkTest);mSubmit = (Button) findViewById(R.id.submit);mRef = (Button) findViewById(R.id.ref);mSubmit.setOnClickListener(this);mRef.setOnClickListener(this);}// 初始化验证码并且刷新界面public void initCheckNum(){checkNum = CheckUtil.getCheckNum();mCheckView.setCheckNum(checkNum);mCheckView.invaliChenkNum();}public void onClick(View v) {switch (v.getId()){ case R.id.submit:String userInput = mEditPass.getText().toString();if(CheckUtil.checkNum(userInput, checkNum)){setPassString("通过");Toast.makeText(this, "通过", 1200).show();}else{setPassString("未通过");Toast.makeText(this, "未通过", 1200).show();}break;case R.id.ref:initCheckNum();break;default:break;}}public void setPassString(String passString) {mShowPassViwe.setText(passString);}}