悬浮指示器布局-自定义控件

这是一个悬浮 【指示器 - 菜单】的控件容器，支持 上滑|下滑 的百分比进度跟踪，去掉了对 layout布局文件的依赖，

去掉了对values 属性文件的依赖，由于第二次维护这个小demo了，以后会的多了，在改进。。。

核心代码如下

/*处理滑动事件：开始*/
if (Math.abs(distanceX) > Math.abs(distanceY * 0.8)) {
    /*上下滑动的  距离 表现不明显*/
    return super.dispatchTouchEvent(event);
}
//KLog.e("isFloated = "+isFloated+" isChildOnTop = "+isChildOnTop);
 /*非悬浮状态，向上滑动↓*/
if ((!isFloated) && (distanceY > 0)) {
   /*非悬浮状态，向上滑动，速度过大↓*/
    if (yVelocity < -yVelocityMax) {
        int indicatorScrollDistanceCurr = 0;
        /*非悬浮状态，向上滑动，速度过大，导航条在初始状态，直接将导航条，全部拖上去↓*/
        if (paramsIvTopBackground.topMargin == 0) {
            distanceY = titleHeight - ivTopBackground.getHeight();
            indicatorScrollDistanceCurr = indicatorScrollDistanceMax;
        } else {
            /*非悬浮状态，向上滑动，速度过大，导航条不在初始状态，直接将导航条，全部拖上去↑*/
            distanceY = -locationIndicatorYInScreen + titleHeight + statusHeight;
            indicatorScrollDistanceCurr = indicatorScrollDistanceMax;
        }
        paramsIvTopBackground.topMargin = paramsIvTopBackground.topMargin + (int) distanceY;
        ivTopBackground.setLayoutParams(paramsIvTopBackground);
        updateScrollProgress(indicatorScrollDistanceCurr);
        isFloated = true;
        return true;
    } else if (yVelocity >= -yVelocityMax) {
        /*非悬浮状态，向上滑动，速度正常↓*/
        if (titleHeight + statusHeight + distanceY > locationIndicatorYInScreen) {
            distanceY = locationIndicatorYInScreen - titleHeight - statusHeight;
        }
        paramsIvTopBackground.topMargin = paramsIvTopBackground.topMargin - (int) distanceY;
        ivTopBackground.setLayoutParams(paramsIvTopBackground);
        /*计算后得到当前真实的  locationIndicatorYInScreen*/
        int locationIndicatorYInScreenTrue = (locationIndicatorYInScreen - (int) distanceY);
        int indicatorScrollDistanceCurr = ivTopBackground.getHeight() + statusHeight - locationIndicatorYInScreenTrue;
        //KLog.e("计算后的 locationIndicatorYInScreen "+locationIndicatorYInScreenTrue+" indicatorScrollDistanceCurr = "+indicatorScrollDistanceCurr);
        //KLog.e("背景图高度 = "+ivTopBackground.getHeight()+" locationIvTopBackgroundYInScreen = "+locationIvTopBackgroundYInScreen+" locationIndicatorYInScreen = " + locationIndicatorYInScreen + " statusHeight = " + statusHeight + " titleHeight = " + titleHeight+" distanceY = "+distanceY+" indicatorScrollDistanceMax = "+indicatorScrollDistanceMax);
        updateScrollProgress(indicatorScrollDistanceCurr);
        return true;
    }
} else if ((!isFloated) && (distanceY < 0)) {
      /*非悬浮状态，向下滑动 ↑*/
    //&& isChildOnTop
    int indicatorScrollDistanceCurr = 0;
    if (locationIndicatorYInScreen == (ivTopBackground.getHeight() + statusHeight)) {
        /*非悬浮状态，向下滑动 ，当前导航条在初始状态↑*/
        return super.dispatchTouchEvent(event);
    }
    if (yVelocity > yVelocityMax) {
        /*非悬浮状态，向下滑动，速度过大*/
        indicatorScrollDistanceCurr = 0;
        paramsIvTopBackground.topMargin = 0;
    } else if (yVelocity < yVelocityMax) {
        /*非悬浮状态，向下滑动 ，速度正常*/
        //KLog.e("topMargin = "+paramsIvTopBackground.topMargin+" locationIndicatorYInScreen = "+locationIndicatorYInScreen+" distanceY = "+distanceY);
        if ((locationIndicatorYInScreen - (int) distanceY) <= (ivTopBackground.getHeight() + statusHeight)) {
            paramsIvTopBackground.topMargin = paramsIvTopBackground.topMargin - (int) distanceY;
            indicatorScrollDistanceCurr = ivTopBackground.getHeight() + statusHeight - (locationIndicatorYInScreen - (int) distanceY);
        } else {
            paramsIvTopBackground.topMargin = 0;
            indicatorScrollDistanceCurr = 0;
        }
    }
    ivTopBackground.setLayoutParams(paramsIvTopBackground);
    updateScrollProgress(indicatorScrollDistanceCurr);
    return true;
} else if (isFloated && (distanceY < 0) && isChildOnTop) {
    isFloated = false;
    int indicatorScrollDistanceCurr = 0;
     /*悬浮状态，向下滑动，ScrollView 展示第一条数据 ↑*/
    if (yVelocity > yVelocityMax) {
        /*悬浮状态，向下滑动，ScrollView 展示第一条数据 ，速度过大，直接将背景图，全部拖出来*/
        indicatorScrollDistanceCurr = 0;
        paramsIvTopBackground.topMargin = 0;
    } else if (yVelocity <= yVelocityMax) {
        /*悬浮状态，向下滑动，ScrollView 展示第一条数据 ，速度正常，将背景图，慢慢拖出来*/
        //KLog.e("distanceY = "+distanceY+" locationIndicatorYInScreen = "+locationIndicatorYInScreen);
        if ((locationIndicatorYInScreen - (int) distanceY) <= (ivTopBackground.getHeight() + statusHeight)) {
            paramsIvTopBackground.topMargin = paramsIvTopBackground.topMargin - (int) distanceY;
            indicatorScrollDistanceCurr = ivTopBackground.getHeight() + statusHeight - (locationIndicatorYInScreen - (int) distanceY);
        } else {
            paramsIvTopBackground.topMargin = ivTopBackground.getHeight() + statusHeight;
            indicatorScrollDistanceCurr = indicatorScrollDistanceMax;
        }
    }
    ivTopBackground.setLayoutParams(paramsIvTopBackground);
    updateScrollProgress(indicatorScrollDistanceCurr);
}
/*处理滑动事件：结束*/

此时此刻，很开心功能可以实现了，不用被鄙视了。

国际惯例 附上源码

https://github.com/Alex-Cin/FloatIndicatorLayout