xiandanin/ItemTouchMoveHelper

RecyclerView的Item滑动触摸辅助类，可以用来实现微信里的表情商店预览功能

ItemTouchMoveHelper

RecyclerView的Item滑动触摸辅助类

Gradle引入

implementation 'com.dyhdyh:item-touch-move-helper:1.0.4'

普通的滑动触摸监听

recyclerView.addOnItemTouchListener(new SimpleItemTouchMoveListener() {
    @Override
    public void onItemTouchMove(boolean isTouchChild, View childView, int childPosition, MotionEvent event) {
        //isTouchChild = 是否触摸在itemView上
        //childView = 当isTouchChild为true时指触摸的itemView,false时为null
        //childPosition = 当isTouchChild为true时指触摸的item位置,false时为-1
        Log.d("onItemTouchMove----->", isTouchChild + "," + childPosition + "," + event.getX() + "," + event.getY() + "," + event.getAction());
    }

    @Override
    public boolean onInterceptEnable() {
        //当需要拦截事件回调onItemTouchMove的时候返回true,否则false,一般需要动态控制
        return true;
    }
});

*微信表情预览

内置了预览效果的监听，在对应的回调控制预览框即可

recyclerView.addOnItemTouchListener(new SimpleMovePreviewListener(recyclerView, new OnMovePreviewListener() {
    @Override
    public void onPreview(View childView, int childPosition) {
	//弹出预览框
	//popupWindow.showAsDropDown(childView,offsetX,offsetY);
    }

    @Override
    public void onCancelPreview() {
        //取消预览框
	//popupWindow.dismiss();
    }
}));

具体使用可以参考MainActivity