如何从Android中的MainActivity访问onBindViewHolder项目值 [英] How to Access an onBindViewHolder item Value from MainActivity in Android

问题描述

我的CarDetailsListAdapter.java文件中有一个如下所示的OnbindViewHolder方法

I have an OnbindViewHolder method in my CarDetailsListAdapter.java file like below

 @Override
public void onBindViewHolder(final CarDetailsListAdapter.ViewHolder viewHolder, final int i) {
    final CarDetailModel currentItem = getItem(i);

    Log.e("check", String.valueOf(modelItems));
    Log.e("check position", i+" "+currentItem.getCarIsSelected());


    // check car min is no cabs or not
    if(!currentItem.getCarMin().equals("No cabs")) {

        if (selectcar) {

            viewHolder.itemView.setSelected(true);
            //selectedItem =viewHolder.getLayoutPosition();
            selectcar = false;
        } else {

            viewHolder.itemView.setSelected(false);
        }
    }

    // set default select car
    viewHolder.itemView.setSelected(selectedItem == i);

    if(first&&currentItem.getCarIsSelected())
    {
        viewHolder.itemView.setSelected(true);
        first=false;
    }
    viewHolder.car_min.setText(currentItem.getCarMin());
    viewHolder.car_amount.setText(currentItem.getCarAmount());

现在我需要从MainActivity访问高于viewHolder.car_amount的值，我不知道如何访问该值

Now I need to access above viewHolder.car_amount value from my MainActivity, i have no idea how to access this value

推荐答案

您要访问car_amount，但您的recyclerview中有多个单元格.我假设您要在单元格上单击"onClick"后访问它.

You want to access car_amount but you have multiple cell in your recyclerview. I will suppose that you want to access it after an "onClick" on your cell.

在特定单元格上单击时，您可以为适配器提供一个侦听器来呼叫.

You can give to your adapter a listener to call when a click is done on a specific cell.

public CarDetailsListAdapter(CarDetailsListListener listener){
    mListener = listener;
}

@Override
public void onBindViewHolder(final CarDetailsListAdapter.ViewHolder viewHolder, final int i) {
   viewHolder.itemView.setOnClickListener(v->{
      mListener.onClick(currentItem.getCarAmount());
   }
}

您的活动:

public CarDetailsListActivity extends Activity implements CarDetailsListListener {
   ...

   mAdapter = new CarDetailsListAdapter(this);

   @Override
   public void onClick(int carAmount){
      ...
   }
}

这篇关于如何从Android中的MainActivity访问onBindViewHolder项目值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！