// 和系统普通进度条一样，0-100。
progressBar.setProgressType(CircleTextProgressbar.ProgressType.COUNT);
// 改变进度条。
progressBar.setProgressLineWidth(30);// 进度条宽度。
// 设置倒计时时间毫秒，默认3000毫秒。
progressBar.setTimeMillis(3500);
// 改变进度条颜色。
progressBar.setProgressColor(Color.RED);
// 改变外部边框颜色。
progressBar.setOutLineColor(Color.RED);
// 改变圆心颜色。
progressBar.setInCircleColor(Color.RED);
// 如果需要自动倒计时，就会自动走进度。
progressBar.start();
// 如果想自己设置进度，比如100。
progressBar.setProgress(100);

@Override
public void layout(int left, int top, int right, int bottom) {
 int w = right - left;
 int h = bottom - top;
 int size = w > h ? w : h;

 if (w > h) {
  bottom += (size - h);
 } else {
  right += (size - w);
 }
 super.layout(left, top, right, bottom);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 int width = getMeasuredWidth();
 int height = getMeasuredHeight();
 int size = width > height ? width : height;
 setMeasuredDimension(size, size);
}

Rect bounds = new Rect();

@Override
protected void onDraw(Canvas canvas) {
 getDrawingRect(bounds);//获取view的边界

 int size = bounds.height() > bounds.width() ? bounds.width() : bounds.height();
 float outerRadius = size / 2; // 计算出绘制圆的半径
}

// 默认透明填充。
ColorStateList inCircleColors = ColorStateList.valueOf(Color.TRANSPARENT);

private void initialize(Context ctx, AttributeSet attributeSet) {
 TypedArray typedArray = ctx.obtainStyledAttributes(attributeSet, R.styleable.Progressbar);
 inCircleColors = typedArray.getColorStateList(R.styleable.Progressbar_circle_color);
 typedArray.recycle();
}

int circleColor = inCircleColors.getColorForState(getDrawableState(), 0);
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(circleColor);
canvas.drawCircle(bounds.centerX(), bounds.centerY(), outerRadius - outLineWidth, mPaint);

mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(outLineWidth);
mPaint.setColor(outLineColor);
canvas.drawCircle(bounds.centerX(), bounds.centerY(), outerRadius - outLineWidth / 2, mPaint);

//画字
Paint paint = getPaint();
paint.setColor(getCurrentTextColor());
paint.setAntiAlias(true);
paint.setTextAlign(Paint.Align.CENTER);
float textY = bounds.centerY() - (paint.descent() + paint.ascent()) / 2;
canvas.drawText(getText().toString(), bounds.centerX(), textY, paint);

RectF mArcRect = new RectF();
Rect bounds = new Rect();

@Override
protected void onDraw(Canvas canvas) {
 getDrawingRect(bounds);//获取view的边界
 ...

 // 绘制进度条圆弧。
 mPaint.setColor(progressLineColor);
 mPaint.setStyle(Paint.Style.STROKE);
 mPaint.setStrokeWidth(progressLineWidth);
 mPaint.setStrokeCap(Paint.Cap.ROUND);
 int deleteWidth = progressLineWidth + outLineWidth;
 // 指定绘制区域
 mArcRect.set(bounds.left + deleteWidth / 2, bounds.top + deleteWidth / 2,
 bounds.right -deleteWidth / 2, bounds.bottom - deleteWidth / 2);
 canvas.drawArc(mArcRect, 0, 360 * progress / 100, false, mPaint);
｝

private int outLineColor = Color.BLACK;
private int outLineWidth = 2;
private ColorStateList inCircleColors = ColorStateList.valueOf(Color.TRANSPARENT);
private int circleColor;
private int progressLineColor = Color.BLUE;
private int progressLineWidth = 8;
private Paint mPaint = new Paint();
private RectF mArcRect = new RectF();
private int progress = 100;
final Rect bounds = new Rect();

@Override
protected void onDraw(Canvas canvas) {
 //获取view的边界
 getDrawingRect(bounds);

 int size = bounds.height() > bounds.width() ? bounds.width() : bounds.height();
 float outerRadius = size / 2;

  //画内部背景
 int circleColor = inCircleColors.getColorForState(getDrawableState(), 0);
 mPaint.setStyle(Paint.Style.FILL);
 mPaint.setColor(circleColor);
 canvas.drawCircle(bounds.centerX(), bounds.centerY(), outerRadius - outLineWidth, mPaint);

 //画边框圆
 mPaint.setStyle(Paint.Style.STROKE);
 mPaint.setStrokeWidth(outLineWidth);
 mPaint.setColor(outLineColor);
 canvas.drawCircle(bounds.centerX(), bounds.centerY(), outerRadius - outLineWidth / 2, mPaint);

 //画字
 Paint paint = getPaint();
 paint.setColor(getCurrentTextColor());
 paint.setAntiAlias(true);
 paint.setTextAlign(Paint.Align.CENTER);
 float textY = bounds.centerY() - (paint.descent() + paint.ascent()) / 2;
 canvas.drawText(getText().toString(), bounds.centerX(), textY, paint);

 //画进度条
 mPaint.setColor(progressLineColor);
 mPaint.setStyle(Paint.Style.STROKE);
 mPaint.setStrokeWidth(progressLineWidth);
 mPaint.setStrokeCap(Paint.Cap.ROUND);
 int deleteWidth = progressLineWidth + outLineWidth;
 mArcRect.set(bounds.left + deleteWidth / 2, bounds.top + deleteWidth / 2,
 bounds.right - deleteWidth / 2, bounds.bottom - deleteWidth / 2);

 canvas.drawArc(mArcRect, 0, 360 * progress / 100, false, mPaint);
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 int lineWidth = 4 * (outLineWidth + progressLineWidth);
 int width = getMeasuredWidth();
 int height = getMeasuredHeight();
 int size = (width > height ? width : height) + lineWidth;
 setMeasuredDimension(size, size);
}