Android 如何在recylerview中禁用向右滑动?
我有一个包含recyclerview和适配器的应用程序,该适配器填充了recyclerview中的一些数据。当我滑动时,将其保留在该位置删除项目。但问题是我不想向右滑动,我只想向左滑动。我该怎么做 代码:-Android 如何在recylerview中禁用向右滑动?,android,Android,我有一个包含recyclerview和适配器的应用程序,该适配器填充了recyclerview中的一些数据。当我滑动时,将其保留在该位置删除项目。但问题是我不想向右滑动,我只想向左滑动。我该怎么做 代码:- ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
if (direction == ItemTouchHelper.LEFT){
adapter.removeItem(position);
}
}
@Override
public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
Bitmap icon;
if(actionState == ItemTouchHelper.ACTION_STATE_SWIPE){
View itemView = viewHolder.itemView;
float height = (float) itemView.getBottom() - (float) itemView.getTop();
float width = height / 3;
if(dX < 0){
p.setColor(Color.parseColor("#D32F2F"));
RectF background = new RectF((float) itemView.getRight() + dX, (float) itemView.getTop(),(float) itemView.getRight(), (float) itemView.getBottom());
c.drawRect(background,p);
icon = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_delete);
RectF icon_dest = new RectF((float) itemView.getRight() - 2*width ,(float) itemView.getTop() + width,(float) itemView.getRight() - width,(float)itemView.getBottom() - width);
c.drawBitmap(icon,null,icon_dest,p);
}
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
itemTouchHelper.attachToRecyclerView(notificationList);
ItemTouchHelper.SimpleCallback simpleItemTouchCallback=新建ItemTouchHelper.SimpleCallback(0,ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT){
@凌驾
公共布尔onMove(RecyclerView RecyclerView、RecyclerView.ViewHolder ViewHolder、RecyclerView.ViewHolder目标){
返回false;
}
@凌驾
公共空间(RecyclerView.ViewHolder ViewHolder,int方向){
int position=viewHolder.getAdapterPosition();
if(direction==ItemTouchHelper.LEFT){
适配器。拆卸项目(位置);
}
}
@凌驾
public void onChildraw(画布c、RecyclerView RecyclerView、RecyclerView.ViewHolder ViewHolder、float dX、float dY、int actionState、boolean isCurrentlyActive){
位图图标;
如果(actionState==ItemTouchHelper.ACTION\u STATE\u SWIPE){
View itemView=viewHolder.itemView;
浮动高度=(float)itemView.getBottom()-(float)itemView.getTop();
浮动宽度=高度/3;
if(dX<0){
p、 setColor(Color.parseColor(#D32F2F”);
RectF background=new RectF((float)itemView.getRight()+dX,(float)itemView.getTop(),(float)itemView.getRight(),(float)itemView.getBottom());
c、 drawRect(背景,p);
icon=BitmapFactory.decodeResource(getResources(),R.mipmap.ic_delete);
RectF icon_dest=new RectF((float)itemView.getRight()-2*width,(float)itemView.getTop()+width,(float)itemView.getRight()-width,(float)itemView.getBottom()-width);
c、 drawBitmap(图标,null,图标,p);
}
}
super.onchildraw(c、recyclerView、viewHolder、dX、dY、actionState、isCurrentlyActive);
}
};
ItemTouchHelper ItemTouchHelper=新的ItemTouchHelper(simpleItemTouchCallback);
itemTouchHelper.attachToRecyclerView(通知列表);
您是否注意到您的第一行代码,即当您向左或向右刷卡时,此代码将被触发
ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
因此,删除正确的方向代码
ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT) {
这将类似于charm:)您可以在
ItemTouchHelper.Callback中重写此方法:
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
final int swipeFlags = ItemTouchHelper.END; // or RIGHT
return makeMovementFlags(0, swipeFlags);
}
试试这个
ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback
(0, ItemTouchHelper.LEFT ) {
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleItemTouchCallback);
itemTouchHelper.attachToRecyclerView(recyclerView);
阅读ItemTouchHelper.Callback
documentation我已经阅读了,但请告诉我如何禁用向右滑动。第二段怎么说?此外,使用SimpleCallback
时,您可以直接传递swipiders
,因此无需重写任何方法