我删除了swipe,它通过重写onChilDraw方法并在提供的画布上绘制一个矩形来绘制背景(很像收件箱应用程序),由ItemTouchHelper实现:
ItemTouchHelper mIth = new ItemTouchHelper(
new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.RIGHT) {
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
remove(viewHolder.getAdapterPosition());
}
public boolean onMove(RecyclerView recyclerview, RecyclerView.ViewHolder v, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
View itemView = viewHolder.itemView;
Drawable d = ContextCompat.getDrawable(context, R.drawable.bg_swipe_item_right);
d.setBounds(itemView.getLeft(), itemView.getTop(), (int) dX, itemView.getBottom());
d.draw(c);
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
});
上面调用的remove方法在Adapter中:
public void remove(int position) {
items.remove(position);
notifyItemRemoved(position);
}
背景绘制得很好,但是当调用notifyItemRemoved时(根据Debugger先生的说法),RecyclerView首先删除我漂亮的绿色背景,然后将两个相邻的项推到一起。
我希望它在这样做的同时保持背景(就像收件箱应用程序一样)。有没有办法做到这一点?
https://stackoverflow.com/questions/31418905
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