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| 1 | +# expandable-recyclerview |
| 2 | +可以展开、折叠分组,支持添加多种divider的adapter |
| 3 | + |
| 4 | + |
| 5 | +### 分组RecyclerView |
| 6 | + |
| 7 | +支持多种group布局和多种child布局 |
| 8 | + |
| 9 | +继承`NestedAdapter`,实现下列方法即可,跟使用`ExpandableListview`类似 |
| 10 | + |
| 11 | +```java |
| 12 | + |
| 13 | + protected abstract int getGroupCount(); |
| 14 | + |
| 15 | + protected abstract int getChildCount(int groupIndex); |
| 16 | + |
| 17 | + protected int getGroupItemViewType(int groupIndex) { |
| 18 | + return 1; |
| 19 | + } |
| 20 | + |
| 21 | + protected int getChildItemViewType(int groupIndex, int childIndex) { |
| 22 | + return 1; |
| 23 | + } |
| 24 | + |
| 25 | + protected abstract G onCreateGroupViewHolder(ViewGroup parent, int viewType); |
| 26 | + |
| 27 | + protected abstract void onBindGroupViewHolder(G holder, int groupIndex); |
| 28 | + |
| 29 | + protected abstract C onCreateChildViewHolder(ViewGroup parent, int viewType); |
| 30 | + |
| 31 | + protected abstract void onBindChildViewHolder(C holder, int groupIndex, int childIndex); |
| 32 | + |
| 33 | + |
| 34 | +``` |
| 35 | + |
| 36 | + |
| 37 | + |
| 38 | +### 为NestedAdapter添加divider |
| 39 | + |
| 40 | +支持添加头部,尾部,group间,child间,group和child间添加自定义divider |
| 41 | + |
| 42 | +```java |
| 43 | + |
| 44 | + public NestedAdapterDivider setDividerBetweenGroup(Drawable dividerBetweenGroup) |
| 45 | + |
| 46 | + public NestedAdapterDivider setDividerBetweenChild(Drawable dividerBetweenChild) |
| 47 | + |
| 48 | + public NestedAdapterDivider setDividerBetweenGroupAndChild(Drawable dividerBetweenGroupAndChild) |
| 49 | + |
| 50 | + public NestedAdapterDivider setDividerBeforeFirstGroup(Drawable dividerBeforeFirstGroup) |
| 51 | + |
| 52 | + public NestedAdapterDivider setDividerAfterLastGroup(Drawable dividerAfterLastGroup) |
| 53 | + |
| 54 | + |
| 55 | +``` |
| 56 | + |
| 57 | +### 展开折叠Recyclerview |
| 58 | + |
| 59 | +继承自ExpandableAdapter即可,调用如下方法实现展开折叠,同样支持多种group布局和多种child布局 |
| 60 | + |
| 61 | +```java |
| 62 | + |
| 63 | + |
| 64 | + public void collapseGroup(int groupIndex) |
| 65 | + |
| 66 | + public void expandGroup(int groupIndex) |
| 67 | + |
| 68 | + public boolean isExpand(int groupIndex) |
| 69 | + |
| 70 | + public void collapseAllGroup() |
| 71 | + |
| 72 | + |
| 73 | +``` |
| 74 | + |
| 75 | + |
| 76 | +### 支持局部刷新,局部移除添加 |
| 77 | + |
| 78 | +相关方法如下 |
| 79 | + |
| 80 | +```java |
| 81 | + |
| 82 | + public void notifyGroupItemChanged(int groupIndex) |
| 83 | + |
| 84 | + public void notifyGroupChanged(int groupIndex) |
| 85 | + |
| 86 | + public final void notifyChildItemChanged(int groupIndex, int childIndex) |
| 87 | + |
| 88 | + public final void notifyChildItemRangeChanged(int groupIndex, int childIndex, int itemCount) |
| 89 | + |
| 90 | + public final void notifyChildItemInserted(int groupIndex, int childIndex) |
| 91 | + |
| 92 | + public final void notifyChildItemRangeInserted(int groupIndex, int childIndex, int itemCount) |
| 93 | + |
| 94 | + public final void notifyChildItemRemoved(int groupIndex, int childIndex) |
| 95 | + |
| 96 | + public final void notifyChildItemRangeRemoved(int groupIndex, int childIndex, int itemCount) |
| 97 | + |
| 98 | +``` |
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