Question

我有一个GridView，想要获取所点击资源的名称（例如R.drawable.foo1），我不知道如何。

这是我的片段中我希望获得名称的地方：

public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() {}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);

        GridView gridview = (GridView) rootView.findViewById(R.id.gridview);
        gridview.setAdapter(new ImageAdapter(getActivity()));

        gridview.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
                // TODO HERE I WANT TO GET THE NAME
            }
        });

        return rootView;
    }
}

我有以下适配器：

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);

            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // references to our images
    private Integer[] mThumbIds = {
            R.drawable.foo1, R.drawable.foo2, R.drawable.foo3
    };
}

Answer 1

将mThumbIds设为公开：

public Integer[] mThumbIds = {
        R.drawable.foo1, R.drawable.foo2, R.drawable.foo3
};

在onItemClicked（）中获取图像资源名称，如下所示：

public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
           int id = mImageAdapter.mThumbIds[position];
        }

Answer 2

在mThumbIds中添加Fragment，然后使用Drawable中的mThumbIds直接从Position获取onItemClick(.....)。

    gridview.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {

            //mThumbIds[position]; get particular Drawable from mThumbIds

        }
    });

Answer 3

gridview.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View v, int position, long id){
                int res = ((ImageAdapter)parent).getResource(position);
            }
        });

然后在适配器中使用此方法获取图像资源：

public void getResource(int pos){
return mThumbIds[position];
}

如何从gridView中单击的图像中获取资源名称？

3 个答案: