Android应用中怎么自定义一个圆形进度条

//1.画圆环
//原点坐标
float circleX = width / 2;
float circleY = width / 2;
//半径
float radius = width / 2 - roundWidth / 2;
//设置画笔的属性
paint.setColor(roundColor);
paint.setStrokeWidth(roundWidth);
paint.setStyle(Paint.Style.STROKE);
canvas.drawCircle(circleX, circleY, radius, paint);
//2.画圆弧
RectF oval = new RectF(roundWidth/2,roundWidth/2,width-roundWidth/2,width - roundWidth/2);
paint.setColor(roundProgressColor);
canvas.drawArc(oval, 0, progress * 360 / max, false, paint);
//3.画文本
paint.setTextSize(textSize);
paint.setColor(textColor);
paint.setStrokeWidth(0);
String text = progress * 100 / max + "%";
Rect bounds = new Rect();
paint.getTextBounds(text, 0, text.length(), bounds);
canvas.drawText(text, width / 2 - bounds.width() / 2, width / 2 + bounds.height() / 2, paint);

xmlns:atguigu=http://schemas.android.com/apk/res-auto

//1.得到所有自定义属性的数组
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.RoundProgress);
//2.获取自定义属性的值, 如果没有指定取默认值
roundColor = typedArray.getColor(R.styleable.RoundProgress_roundColor, Color.RED);
roundProgressColor = typedArray.getColor(R.styleable.RoundProgress_roundProgressColor, Color.GREEN);
textColor = typedArray.getColor(R.styleable.RoundProgress_textColor, Color.GREEN);
roundWidth = typedArray.getDimension(R.styleable.RoundProgress_roundWidth, UIUtils.dp2px(10));
textSize = typedArray.getDimension(R.styleable.RoundProgress_textSize, UIUtils.dp2px(20));
//3.释放资源数据
typedArray.recycle();