Android的GridView控件 - 更新视图基于位置 [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延伸BaseAdapter),其中网格的每个项目持有的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.
不过,从我的code别处,是根据它在GridView位置在网格哪能更新图像(setImageResource)一个特定的项目?
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,我已将此添加到我的适配器类:
So far, I've added this to my adapter class:
public void changeImage() {
Log.d(TAG, "Image change");
this.ImageButton.setImageResource(R.drawable.newImage);
}
和想这样写: 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
在图像的情况下在一个GridView我这样做,它的工作原理也:
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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