前言
大家在平时的生活上遇到新奇的事情，都要立即打开微信视频录下来发给朋友看看。这个录制进度条看起来还不错哦，就仿着写了一个，不是样式完全的高仿，是功能的仿制。下面话不多说了，来一起看看详细的介绍吧。
微信效果：
源码下载：
自制效果：
实现过程：
1.自定义圆半径和圆环颜色属性：
<declare-styleable name="CiclePercentView"> <attr name="radius" format="integer"/> <attr name="ring_color" format="color"/> </declare-styleable>
2.设置3支画笔，分别画圆环，背景浅白色，中心白色圆。
private void init() { paint = new Paint(); paint.setColor(ringColor); paint.setStyle(Paint.Style.STROKE); paint.setAntiAlias(true); paint.setStrokeWidth(14); bgPaint = new Paint(); bgPaint.setAntiAlias(true); bgPaint.setColor(getResources().getColor(R.color.halfwhite)); centerPaint = new Paint(); centerPaint.setAntiAlias(true); centerPaint.setColor(Color.WHITE); //起始角度 startAngle = -90; } 3.依次画背景圆，中心圆，圆弧。canvas.drawArc() ，第一个参数表示圆弧外切矩形大小；第二、三个参数表示起始角度，当前角度，-90度为12点方向，0度为3点方向，这里用-90度作为起始；第四个参数表示是否与中心点填充为扇形，false表示只画圆弧线；
画圆弧drawArc()方法参数
@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //画圆弧 RectF rectf = new RectF(6,6,dp2px(radius-2),dp2px(radius-2)); canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,dp2px(radius)/2,bgPaint); canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,dp2px(radius/3)/2,centerPaint); canvas.drawArc(rectf,startAngle,curAngle,false,paint); }4.计时器，每100毫秒更新一次进度，可设置拍摄总时间totalTime;时间转化为进度范围为0-100；
public void countDown(final int totalTime){ countDownTimer = new CountDownTimer(totalTime, (long)(totalTime/100f)) { @Override public void onTick(long millisUntilFinished) { curPercentate = (int) ((totalTime-millisUntilFinished)/(float)totalTime*100); percentToAngle(curPercentate); } @Override public void onFinish() { curPercentate = 0; percentToAngle(curPercentate); } }.start(); }5.按下开始拍摄，只要抬起就完成拍摄，进度恢复为0。
@Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()){ case MotionEvent.ACTION_DOWN: countDown(countdownTime); break; case MotionEvent.ACTION_UP: countDownTimer.cancel(); curPercentate = 0; percentToAngle(curPercentate); break; } return true; }CiclePercentView类完整代码：
public class CiclePercentView extends View{ private Paint paint; private int curAngle; private int curPercentate; private Paint bgPaint,centerPaint; private int radius; private int ringColor; private int startAngle; private int countdownTime; private CountDownTimer countDownTimer; public CiclePercentView(Context context) { super(context); init(); } public CiclePercentView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); TypedArray array = context.obtainStyledAttributes(attrs,R.styleable.CiclePercentView); radius = array.getInt(R.styleable.CiclePercentView_radius,85); ringColor = array.getColor(R.styleable.CiclePercentView_ring_color,Color.GREEN); array.recycle(); init(); } private void init() { paint = new Paint(); paint.setColor(ringColor); paint.setStyle(Paint.Style.STROKE); paint.setAntiAlias(true); paint.setStrokeWidth(14); bgPaint = new Paint(); bgPaint.setAntiAlias(true); bgPaint.setColor(getResources().getColor(R.color.halfwhite)); centerPaint = new Paint(); centerPaint.setAntiAlias(true); centerPaint.setColor(Color.WHITE); //起始角度 startAngle = -90; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); //画圆弧 RectF rectf = new RectF(6,6,dp2px(radius-2),dp2px(radius-2)); canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,dp2px(radius)/2,bgPaint); canvas.drawCircle(getMeasuredWidth()/2,getMeasuredHeight()/2,dp2px(radius/3)/2,centerPaint); canvas.drawArc(rectf,startAngle,curAngle,false,paint); } private void percentToAngle(int percentage){ curAngle = (int) (percentage/100f*360); invalidate(); } public void setCountdownTime(int countdownTime){ this.countdownTime = countdownTime; } public void countDown(final int totalTime){ countDownTimer = new CountDownTimer(totalTime, (long)(totalTime/100f)) { @Override public void onTick(long millisUntilFinished) { curPercentate = (int) ((totalTime-millisUntilFinished)/(float)totalTime*100); percentToAngle(curPercentate); } @Override public void onFinish() { curPercentate = 0; percentToAngle(curPercentate); } }.start(); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()){ case MotionEvent.ACTION_DOWN: countDown(countdownTime); break; case MotionEvent.ACTION_UP: countDownTimer.cancel(); curPercentate = 0; percentToAngle(curPercentate); break; } return true; } private int dp2px(int dp){ return (int) (getContext().getResources().getDisplayMetrics().density*dp + 0.5); }}附：Android Canvas drawArc方法介绍
public void drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
下面演示drawArc的四种不同用法,
1. 填充圆弧但不含圆心：
mPaints[0] = new Paint();mPaints[0].setAntiAlias(true);mPaints[0].setStyle(Paint.Style.FILL);mPaints[0].setColor(0x88FF0000);mUseCenters[0] = false;
2. 填充圆弧带圆心（扇形）
mPaints[1] = new Paint(mPaints[0]);mPaints[1].setColor(0x8800FF00);mUseCenters[1] = true;
3. 只绘圆周，不含圆心
mPaints[2] = new Paint(mPaints[0]);mPaints[2].setStyle(Paint.Style.STROKE);mPaints[2].setStrokeWidth(4);mPaints[2].setColor(0x880000FF);mUseCenters[2] = false;
4. 只绘圆周，带圆心（扇形）
mPaints[3] = new Paint(mPaints[2]);mPaints[3].setColor(0x88888888);mUseCenters[3] = true;
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对VEVB武林网的支持。
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