MaterialProgressDrawable.java 文件源码

public Ring(Callback callback) {
    mCallback = callback;

    mPaint.setStrokeCap(Paint.Cap.SQUARE);
    mPaint.setAntiAlias(true);
    mPaint.setStyle(Style.STROKE);

    mArrowPaint.setStyle(Style.FILL);
    mArrowPaint.setAntiAlias(true);
}