回收站查看项目背景更改项目点击

Question

在这里我有项目的列表在回收器视图这是取自Firebase.所以我试图改变其背景颜色当用户点击它.但是当我点击项目1然后项目4背景颜色也得到改变.如果点击项目2然后项目8颜色也.它给不恰当的结果。

    firebaseTimeadapter = new FirebaseRecyclerAdapter<TimeSlot, FirebaseTimeViewHolder>(
            TimeSlot.class,
            R.layout.time_slot_layout,
            FirebaseTimeViewHolder.class,
            timeSlot.child(Common.BikeId)) {
        //variable to hold selected Item position
        private int mSelectedItemPosition = -1;



        @Override
        protected void populateViewHolder(final FirebaseTimeViewHolder firebaseTimeViewHolder, TimeSlot slot, final int i) {
            firebaseTimeViewHolder.time_slot.setText(slot.getTime_slot());
            firebaseTimeViewHolder.txt_time_slot_description.setText(ConvertToAvailableorNotAvailable(slot.isAvailable()));
            firebaseTimeViewHolder.setItemClickListener(new ItemClickListener() {

                @Override
                public void onClick(View view, int position, boolean isLongClick) {

                    firebaseTimeViewHolder.card_view_slot.setCardBackgroundColor(getResources().getColor(android.R.color.darker_gray));

                    firebaseTimeViewHolder.card_view_slot.setClickable(false);

                    firebaseTimeViewHolder.time_slot.setTextColor(getResources()
                            .getColor(android.R.color.white));
                    firebaseTimeViewHolder.txt_time_slot_description.setTextColor(getResources().getColor(android.R.color.white));


                      //  firebaseTimeViewHolder.card_view_slot.setCardBackgroundColor(getResources().getColor(android.R.color.darker_gray));
                        date = new SimpleDateFormat("dd-MMM").format(new Date());
                        txt_from_date.setText(date + " " + slot.getTime_slot());
                    //    Toast.makeText(BookingCalender.this, "Clicked" + slot.getTime_slot(), Toast.LENGTH_SHORT).show();


                }
            });

        }
    };
    recycler_time_list.setAdapter(firebaseTimeadapter);

视图持有者类

public class FirebaseTimeViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

public TextView time_slot,txt_time_slot_description;
public CardView card_view_slot;

private ItemClickListener itemClickListener;




public FirebaseTimeViewHolder(View itemView) {
    super(itemView);

    time_slot=(TextView)itemView.findViewById(R.id.time_slot);
    txt_time_slot_description=(TextView)itemView.findViewById(R.id.txt_time_slot_description);
    card_view_slot=(CardView)itemView.findViewById(R.id.card_time_slot);
    itemView.setOnClickListener(this);

}

public void setItemClickListener(ItemClickListener itemClickListener){
    this.itemClickListener=itemClickListener;
}

@Override
public void onClick(View v) {

    itemClickListener.onClick(v,getAdapterPosition(),false);

}

}

Answer 1

删除这个无意义的部分，只需使用itemView即可。setOnClickListener（）：

private ItemClickListener itemClickListener;
public void setItemClickListener(ItemClickListener itemClickListener){
    this.itemClickListener = itemClickListener;
}

这部分也很奇怪；在最好的情况下，它会导致一个无休止的循环：

itemClickListener.onClick(v, getAdapterPosition(), false);

这至少可以解决由于将所有项设置为同一个侦听器而导致的异常行为。。。

而我认为你可能正在寻找类似于androidx的东西。回收视图。选择：

implementation "androidx.recyclerview:recyclerview:1.1.0"
implementation "androidx.recyclerview:recyclerview-selection:1.0.0"

请参见“步骤5：突出显示所选项目”下面的回收器视图选择指南。

然而，通过数据绑定可以更好地保持选择