Androidrecyclerview实现拖拽排序和侧滑删除-创新互联
Recyclerview现在基本已经替代Listview了,RecyclerView也越来越好用了 当我们有实现条目的拖拽排序和侧滑删除时 可以直接时候Recyclerview提供的API就可以直接实现了
先贴上主要代码

private void initveiw() {
ArrayList items = new ArrayList<>(Arrays.asList("itme1", "item2", "itme3", "item4", "item5", "item6", "item7", "item8", "itme9", "item10", "itme11", "item12", "item13", "item14", "item15", "item16"));
recyclerView.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));
SimpleAdapter adapter = new SimpleAdapter(items);
recyclerView.setAdapter(adapter);
ItemTouchHelper helper = new ItemTouchHelper(new MyItemTouchCallback(adapter));
helper.attachToRecyclerView(recyclerView);
}
public class MyItemTouchCallback extends ItemTouchHelper.Callback{
private SimpleAdapter adapter;
public MyItemTouchCallback(SimpleAdapter adapter) {
this.adapter = adapter;
}
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
int dragFlag;
int swipeFlag;
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager instanceof GridLayoutManager){
dragFlag = ItemTouchHelper.DOWN | ItemTouchHelper.UP | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
swipeFlag = 0;
}else{
dragFlag = ItemTouchHelper.DOWN | ItemTouchHelper.UP;
swipeFlag = ItemTouchHelper.END | ItemTouchHelper.START;
}
return makeMovementFlags(dragFlag,swipeFlag);
}
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
int fromPosition = viewHolder.getAdapterPosition();
int toPosition = target.getAdapterPosition();
if (fromPosition < toPosition ){
for (int i = fromPosition ;itoPosition; i--){
Collections.swap(adapter.getDataList(),i ,i-1);
}
}
recyclerView.getAdapter().notifyItemMoved(fromPosition,toPosition);
return true;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
if (direction == ItemTouchHelper.END | direction==ItemTouchHelper.START){
adapter.getDataList().remove(position);
adapter.notifyItemRemoved(position);
}
}
@Override
public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
super.onSelectedChanged(viewHolder, actionState);
if (actionState==ItemTouchHelper.ACTION_STATE_DRAG){
viewHolder.itemView.setBackgroundColor(Color.BLUE);
}
}
@Override
public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
super.clearView(recyclerView, viewHolder);
viewHolder.itemView.setBackgroundColor(0);
}
}
本文题目:Androidrecyclerview实现拖拽排序和侧滑删除-创新互联
标题路径:http://jxjierui.cn/article/dseogc.html


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