自定义ViewGroup卡片式页面效果、Horizontalview下标跟随宽度移动改变

先上效果图！ gif录制的比较挫。。。



   






主要实现的功能有：

Horizontalview的item滑动字体颜色渐变（仿微信）和大小渐变。

Scrollview是重写的ViewGroup，实现的自定义卡片式布局。

所有自定义控件的交互我都放在MainActivity：

/**
* horizontalview点击时切换scrollview对应的pager
*/
private Handler horiHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case CommonUrl.SCROLL_ROLL:
scrollView.setMovePage(msg.arg1);//点击item切换Scrollview
CursorFollow();
break;
case CommonUrl.SETDATA:
int width = 0;
for (int i = 0; i < textViewList.size(); i++) {
width += textViewList.get(i).getViewWidth();
}
mHorizontalViewWidth = msg.arg1;//屏幕宽度
mTabItemWidth = width / textViewList.size();//item宽度
pageItemNumber = mHorizontalViewWidth / mTabItemWidth;//页显示item数量
startScroll = pageItemNumber / 2 + pageItemNumber % 2;//起始滚动item
endScroll = textViewList.size() - pageItemNumber + startScroll;//结束滚动item
horizontalView.setStartScroll(startScroll, endScroll);
break;
}
super.handleMessage(msg);
}
};

/**
* Horizontalview游标跟随
* */
private void CursorFollow() {
ValueAnimator anim = ValueAnimator.ofFloat(lineView.getTranslationX(),//游标当前位置
getScrollDistance(Index, scrollView.getTargetIndex()));//目标位置
anim.setDuration(moveAnimTime);
anim.start();
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
lineView.setTranslationX((float) animation.getAnimatedValue());//设置平移过渡
}
});
lineViewParams = (LinearLayout.LayoutParams) lineView.getLayoutParams();
anim = ValueAnimator.ofFloat(lineViewParams.width,
textViewList.get(scrollView.getTargetIndex()).getViewWidth());//游标宽度过渡
anim.setDuration(moveAnimTime);
anim.start();
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
lineViewParams.width = Math.round(Float.parseFloat(animation.getAnimatedValue().toString()));
lineView.setLayoutParams(lineViewParams);
}
});
}

/**
* scrollLayout滑动时触发horizontalview文字的颜色和大小渐变效果。
*/
private Handler touchHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MotionEvent.ACTION_DOWN:
mXDown = (float) msg.obj;
mXMove = mXDown;
Index = scrollView.getTargetIndex();
/**
* 按下时初始化参数
* */
rollBackIndex = -1;
targetLeftIndex = -1;
moveState = -1;
textSelectScale = faultSelectScale;
textNormalScale = faultNormalScale;
break;
case MotionEvent.ACTION_MOVE: //滑动操作
break;
case MotionEvent.ACTION_UP: //手指弹起
break;
case CommonUrl.FASTMOVE: //快速滑动时的up
break;
}
super.handleMessage(msg);
}
};

有兴趣的可以下载代码看下： 
 Github：https://github.com/yfchu/CustomHorizontalScrollview/        （star下谢谢）

 CSDN：http://download.csdn.net/detail/u010470383/9724141