PopupLayer.java 文件源码

/**
 * 用来给每一个button设置一个中心点
 *
 * @param orbit 一个特定角度的path
 */
private void setPos(Path orbit) {
    PathMeasure measure = new PathMeasure(orbit, false);
    TextLableView tv;
    for (int i = 0; i < mButtons.size(); i++) {
        PopupButton pp = mButtons.get(i);
        tv = kvs.get(pp);
        float[] coords = new float[]{0f, 0f};
        int length = (int) ((i) * measure.getLength() / mButtons.size());
        measure.getPosTan(length, coords, null);
        int px = (int) coords[0] - pp.getMeasuredWidth() / 2;
        int py = (int) coords[1] - pp.getMeasuredHeight() / 2;
        int tvx = (int) coords[0] - tv.getMeasuredWidth() / 2;
        tv.x = tvx;
        tv.y = py - 60;
        pp.x = px;
        pp.y = py;
    }
}