Android GridView - 根据位置更新视图 [英] Android GridView - update View based on position

问题描述

我有一个 GridView，使用自定义适配器(myAdapter 扩展 BaseAdapter)，其中网格中的每个项目都包含一个 ImageButton.getView() 工作正常.

I have a GridView, using a custom adapter (myAdapter extends BaseAdapter), where each item in the grid holds an ImageButton. getView() is working fine.

但是，从我的代码中的其他地方，如何根据网格中某个特定项目在 GridView 中的位置更新该图像 (setImageResource)?

However, from elsewhere in my code, how can I update the image (setImageResource) for one particular item in the grid based on its position in the GridView?

到目前为止，我已将其添加到我的适配器类中:

So far, I've added this to my adapter class:

public void changeImage() {
        Log.d(TAG, "Image change");
        this.ImageButton.setImageResource(R.drawable.newImage);
}

并且想写这样的东西:mygridview.getItemIdAtPosition(20).changeImage();(不编译).

And would like to write something like this: mygridview.getItemIdAtPosition(20).changeImage(); (doesn't compile).

推荐答案

如果是 GridView 中的图像，我这样做了，它也有效:

In case of Images in a GridView I did this and it works also:

gridview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View imgView, int position, long id) {
    ImageView imageView = (ImageView) imgView;
    imageView.setImageResource(R.drawable.newImage);
        }
    });    }

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