你可以通过自定义适配器来解决Android GridView计算背景颜色不均匀的问题。以下是一个示例代码:
首先,创建一个名为MyAdapter
的自定义适配器类:
public class MyAdapter extends BaseAdapter {
private Context mContext;
private List mColors;
public MyAdapter(Context context, List colors) {
mContext = context;
mColors = colors;
}
@Override
public int getCount() {
return mColors.size();
}
@Override
public Object getItem(int position) {
return mColors.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.grid_item_layout, null);
holder = new ViewHolder();
holder.colorView = (ImageView) convertView.findViewById(R.id.color_view);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
int color = mColors.get(position);
holder.colorView.setBackgroundColor(color);
return convertView;
}
static class ViewHolder {
ImageView colorView;
}
}
然后,创建一个名为grid_item_layout.xml
的布局文件,用于定义每个GridView的项的布局:
最后,将适配器应用到GridView上:
GridView gridView = findViewById(R.id.grid_view);
List colors = Arrays.asList(Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW, Color.MAGENTA, Color.CYAN);
MyAdapter adapter = new MyAdapter(this, colors);
gridView.setAdapter(adapter);
以上代码中,colors
列表包含了要显示的颜色,MyAdapter
将颜色应用到每个GridView项的背景上。这样,GridView的背景颜色就会均匀显示了。