CircularProgressView.java 文件源码

private void updatePath(final int w, final int h) {
    final float maxAbsSize = Math.min(w, h) / 2f;
    final float absSize = size < maxSize ? maxAbsSize * size / maxSize
            : maxAbsSize - 1;

    path.reset();

    if (progress == 0) {
        path.close();
    } else if (progress < maxProgress) {
        final float angle = progress * 360 / maxProgress;
        final float x = w / 2f;
        final float y = h / 2f;

        path.moveTo(x, y);
        path.arcTo(new RectF(x - absSize, y - absSize, x + absSize, y
                + absSize), 270, angle);
        path.close();
    } else {
        path.addCircle(w / 2f, h / 2f, absSize, Direction.CW);
    }
}