Android-滑动以删除RecyclerView [英] Android - Swipe to delete RecyclerView

问题描述

我正在尝试实施滑动删除操作，以删除与Gmail应用程序滑动到存档"相同的内容:

I am trying to implement swipe to delete the same as Gmail app "Swipe to archive":

我尝试了许多教程，但没有一个能像gmail一样快， 我更喜欢不使用外部库.我该怎么办?

I have tried many tutorials but none of them works as fast as gmail, I prefer to not work on external library. How can i do it?

到目前为止我的代码-

  ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
                public boolean onMove(RecyclerView recyclerView,
                                               RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
//                    final int fromPos = viewHolder.getAdapterPosition();
//                    final int toPos = viewHolder.getAdapterPosition();
//                    // move item in `fromPos` to `toPos` in adapter.
                    return true;// true if moved, false otherwise
                }

            @Override
            public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
                //Remove swiped item from list and notify the RecyclerView
                mAdapter.notifyItemRemoved(viewHolder.getLayoutPosition());
            }
        };
        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
        itemTouchHelper.attachToRecyclerView(mRecyclerView);

我设法启用了滑动手势，但是我不知道如何在viewHolder下添加背景和图像.我试图在item_XXX.xml文件中放置另一个FrameLayout，但是在滑动时会抛出整个带有背景的项.

I've managed to enable swipe gesture but i don't know how to add a background and an image under the viewHolder. I tried to put another FrameLayout at the item_XXX.xml file but on swipe it throws the whole item with the background.

推荐答案

RecyclerView滑动的简单代码:

     ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT | ItemTouchHelper.DOWN | ItemTouchHelper.UP) {

            @Override
            public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
                Toast.makeText(ListActivity.this, "on Move", Toast.LENGTH_SHORT).show();
                return false;
            }

            @Override
            public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
                Toast.makeText(ListActivity.this, "on Swiped ", Toast.LENGTH_SHORT).show();
                //Remove swiped item from list and notify the RecyclerView
                int position = viewHolder.getAdapterPosition();
                arrayList.remove(position);
                adapter.notifyDataSetChanged();

            }
     };

然后使用以下语句为recyclerView设置回调:

Then set callback for recyclerView with below statements:

ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
 itemTouchHelper.attachToRecyclerView(rv);

这篇关于Android-滑动以删除RecyclerView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！