java - 从适配器android返回更改的arrayList

具有gridview，其setArray的参数名为ImageAdapter的设置适配器。适配器内部具有onclicklistener，在此期间从arraylist中删除一项，然后当我在gridview项目中使用此行ImageAdapter.notifyDataSetChanged时删除。现在我需要在活动中更改arrayArray，以便如何获取它。

这是我的代码：

public class ImageAdapter extends BaseAdapter {
Context context;
ArrayList<String> listCheck = new ArrayList<String>();
ImageAdapter adapter = this;

    public ImageAdapter(Context context, ArrayList<String> list) {
    this.context = context;
    listCheck = list;
}
    @Override
public int getCount() {
    return listCheck.size();
}

    @Override
public Object getItem(int arg0) {
    return null;
}

    @Override
public long getItemId(int arg0) {
    return 0;
}

    @Override
public View getView(final int position, View convertView, ViewGroup parent) {
    ViewHolder121 holder;
    if (convertView == null) {
        convertView = LayoutInflater.from(context).inflate(
        R.layout.item_gridmain, null);
        holder = new ViewHolder121();
        holder.imageView = (ImageView) convertView
                    .findViewById(R.id.img_selected_image);
       holder.close = (ImageButton) convertView
                    .findViewById(R.id.img_btn_cancel);
        convertView.setTag(holder);
}

        else {
        holder = (ViewHolder121) convertView.getTag();
    }
    holder.close.setOnClickListener(new View.OnClickListener() {
    public void onClick(View arg1) {
                listCheck.remove(position);
                adapter.notifyDataSetChanged();
 }
}); Bitmap bm = decodeSampledBitmapFromUri(listCheck.get(position), 220,
                220);
holder.imageView.setImageBitmap(bm);
        return convertView;
}       }

片段代码：

ImageAdapter mainActivityAdapter = new ImageAdapter(getActivity(), ar1);
                 gridview_withimage.setAdapter(mainActivityAdapter);

问题：如何将数组列表从ImageAdapter更改为Fragement

最佳答案

如何将数组列表从ImageAdapter更改为Fragement


在ImageAdapter中创建一个方法，该方法将返回ArrayList用作适配器中的数据源：

public ArrayList<String> getModifyList() {
    return listCheck;
}

调用Fragment中的getModifyList方法以使用Adapter对象获取ArrayList：

gridview_withimage.setAdapter(mainActivityAdapter);
gridview_withimage.postDelayed(new Runnable() {

 @Override
  public void run() {
 // TODO Auto-generated method stub
    ArrayList<String> arrNewList=mainActivityAdapter.getModifyList();
  }
 }, 100);