yokeyword / itemtouchhelperdemo

ItemTouchHelper实现今日头条频道功能

ItemTouchHelperDemo

使用ItemTouchHelper实现今日头条 网易新闻 的频道排序、频道移动

效果演示

源码分析

查看我的这篇简书

itemtouchhelperdemo's Issues

When RecyclerView's LayoutManager is horizontal LinearLayoutManager, ItemDragHelperCallback does not work correctly

Problem describe:
When RecyclerView's LayoutManager is horizontal LinearLayoutManager, viewHolder can not be dragged left or right.

Problem code:
ItemDragHelperCallback getMovementFlags()

        if (manager instanceof GridLayoutManager || manager instanceof StaggeredGridLayoutManager) {
            dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
        } else {
            dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
        }

Fix:

        if (manager instanceof GridLayoutManager || manager instanceof StaggeredGridLayoutManager) {
            dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
        } else { // LinearLayoutManager
            LinearLayoutManager linearLayoutManager = (LinearLayoutManager) manager;
            if (linearLayoutManager.getOrientation() == LinearLayoutManager.HORIZONTAL) {
                dragFlags = ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
            } else {
                dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
            }
        }

动画执行有问题

布局文件如下所示时，我的频道和其他频道的item移动动画会出现问题，动画不正常

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recy"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipChildren="false"
        android:clipToPadding="false"/>
</LinearLayout>