圆形倒计时CountDownTimer（60s）

注意：调用直接在布局文件中用就行，setDuration直接用，也可以自己修改，颜色可以自己修改


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.os.CountDownTimer;
import android.util.AttributeSet;
import android.view.View;

import com.iqilu.phonetoken.R;


public class CountDownProgressBar extends View {

    /**
     * 当前进度值
     */
    private int currentValue ;

    /**
     * 每次扫过的角度，用来设置进度条圆弧所对应的圆心角，alphaAngle=(currentValue/maxValue)*360
     */
    private float alphaAngle;

    /**
     * 圆环的宽度
     */
    private int circleWidth = 10;

    /**
     * 画圆弧的画笔
     */
    private Paint circlePaint;

    /**
     * 画文字的画笔
     */
    private Paint textPaint;

    private OnFinishListener listener;
    private int time_x,time_y,name_y,number_y,home_y;
    private CountDownTimer countDownTimer;
    private String keyName,keyNumber,sysName = "111";

    public CountDownProgressBar(Context context) {
        this(context, null);
    }


    public CountDownProgressBar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }


    public CountDownProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        circlePaint = new Paint();
        circlePaint.setAntiAlias(true); // 抗锯齿
        circlePaint.setDither(true); // 防抖动
        circlePaint.setStrokeWidth(circleWidth);//画笔宽度
        textPaint = new Paint();
        textPaint.setAntiAlias(true);
        textPaint.setDither(true);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // 分别获取期望的宽度和高度，并取其中较小的尺寸作为该控件的宽和高,并且不超过屏幕宽高
        int widthPixels = this.getResources().getDisplayMetrics().widthPixels;//获取屏幕宽
        int heightPixels = this.getResources().getDisplayMetrics().heightPixels;//获取屏幕高
        int width = MeasureSpec.getSize(widthMeasureSpec);
        int hedight = MeasureSpec.getSize(heightMeasureSpec);
        int minWidth = Math.min(widthPixels, width);
        int minHedight = Math.min(heightPixels, hedight);
        setMeasuredDimension(Math.min(minWidth, minHedight), Math.min(minWidth, minHedight));
    }

    @Override
    protected void onDraw(Canvas canvas) {
        time_x = this.getWidth() / 2;
        time_y = this.getHeight();
        number_y = time_y/2;
        name_y = number_y/2;
        home_y = number_y + 100;
        int radius = time_x - circleWidth / 2-10;
        drawCircle(canvas, radius); // 绘制进度圆弧
        drawText(canvas);
    }

    /**
     * 绘制进度圆弧
     *
     * @param canvas 画布对象
     * time_x 圆心的x和y坐标
     * @param radius 圆的半径
     */
    private void drawCircle(Canvas canvas, int radius) {
        circlePaint.setShader(null); // 清除上一次的shader
        circlePaint.setColor(getContext().getColor(R.color.countdown_back)); // 设置底部圆环的颜色，这里使用第一种颜色
        circlePaint.setStyle(Paint.Style.STROKE); // 设置绘制的圆为空心
        canvas.drawCircle(time_x, time_x, radius, circlePaint); // 画底部的空心圆
        RectF oval = new RectF(time_x - radius, time_x - radius, time_x + radius, time_x + radius); // 圆的外接正方形
        circlePaint.setColor(getContext().getColor(R.color.mytoken_blue)); // 设置圆弧的颜色
        circlePaint.setStrokeCap(Paint.Cap.ROUND); // 把每段圆弧改成圆角的
        alphaAngle = currentValue * 6;
        canvas.drawArc(oval,90, alphaAngle, false, circlePaint);
    }

    /**
     * 绘制文字
     *
     * @param canvas 画布对象
     */
    private void drawText(Canvas canvas) {
        //时间
        String percent;
        percent = currentValue + "/" + "60s";
        textPaint.setTextSize(36); // 设置要绘制的文字大小
        textPaint.setTextAlign(Paint.Align.CENTER); // 设置文字居中，文字的x坐标要注意
        textPaint.setColor(getContext().getColor(R.color.mytoken_blue)); // 设置文字颜色
        textPaint.setStrokeWidth(0); // 注意此处一定要重新设置宽度为0,否则绘制的文字会重叠
        Rect bounds = new Rect(); // 文字边框
        textPaint.getTextBounds(percent, 0, percent.length(), bounds); // 获得绘制文字的边界矩形
        canvas.drawText(percent, time_x, time_y-30, textPaint); // 绘制表示进度的文字
        //号
        textPaint.setTextSize(125);
        textPaint.setTypeface(Typeface.DEFAULT_BOLD);
        canvas.drawText(keyNumber, time_x, number_y, textPaint); // 绘制表示进度的文字
        //名
        textPaint.setTextSize(28);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(getContext().getColor(R.color.text_color_33));
        canvas.drawText("NO:"+keyName, time_x, name_y, textPaint); // 绘制表示进度的文字

        //固定
        textPaint.setTextSize(26);
        textPaint.setTypeface(Typeface.DEFAULT);
        textPaint.setColor(getContext().getColor(R.color.text_gray));
        canvas.drawText(sysName, time_x, home_y, textPaint); // 绘制表示进度的文字
    }

    /**
     * 按进度显示百分比，可选择是否启用数字动画
     *countDownTimer 需要cancel然后new出来
     * @param duration 动画时长
     */
    public void setDuration(int duration,String keyName,String keyNumber, OnFinishListener listener) {
        this.keyName = keyName;
        this.keyNumber = keyNumber;
        this.listener = listener;
        currentValue = duration/1000;
        if(countDownTimer!=null){
            countDownTimer.cancel();
            countDownTimer = null;
        }
        countDownTimer = new CountDownTimer(duration,1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                currentValue--;
                invalidate();
            }

            @Override
            public void onFinish() {
                CountDownProgressBar.this.listener.onFinish();
            }
        };
        countDownTimer.start();
    }

    public interface OnFinishListener {
        void onFinish();
    }

}

Activity中

countDownProgressBar.setDuration(timeCount,tokenName,secretNumber,new CountDownProgressBar.OnFinishListener() {
    @Override
    public void onFinish() {
        timeCount = 60*1000;
        countDownProgressBar.setDuration(timeCount,tokenName,secretNumber,this);
        //处理自己的方法
    }
});