我以编程方式创建了要在对话框中使用的图像 GridView。如果我将列设置为自动调整,无论图像大小和屏幕大小如何,我总是会得到两列。如果我将列数强制为固定数量,那么它可以工作,但我无法避免图像在某些屏幕尺寸上重叠,因此自动管理列数会好得多。更重要的是,当我尝试设置拉伸时,它根本不显示任何东西!
我的图像适配器:
public class ImageAdapter extends BaseAdapter {
private Context mContext;
// Constructor
public ImageAdapter(Context c){
mContext = c;
}
public int getCount() {
return (IconC.Res.length);
}
public Object getItem(int position) {
return (IconC.Res[position]);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
imageView = new ImageView(mContext);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(IconC.Res[position]);
return (imageView);
}
}
以及创建 Dialog 的函数(在其他地方使用 .show() 调用)
private void createPopUp() {
d_icons = new Dialog(this);
GridView gv_icons = new GridView(this);
// gv_icons.setNumColumns(GridView.AUTO_FIT); // autofit disabled, shows ONLY TWO COLUMNS
gv_icons.setNumColumns(4); // instead, autofit forced, now it works, but I don't want it fixed!
gv_icons.setGravity(Gravity.CENTER);
gv_icons.setHorizontalSpacing(3);
gv_icons.setVerticalSpacing(1);
// gv_icons.setStretchMode(GridView.STRETCH_SPACING); // stretching disabled, shows ZERO COLUMNS
gv_icons.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
gv_icons.setAdapter(new ImageAdapter(this));
gv_icons.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick (AdapterView<?> parent, View view, int position, long id) {
eventIcons.set(selectedItem, position);
updateEventView();
d_icons.dismiss();
}
});
d_icons.setTitle(R.string.text_chooseicon);
d_icons.addContentView(gv_icons, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
d_icons.setCancelable(true);
}
谁能发现为什么会这样?谢谢!!
以下是 4 个固定列的显示方式:i50.tinypic.com/2ebdfec.png
这是自动调整的方式:i50.tinypic.com/25jxo9s.png
这是水平选项卡上自动调整的布局:i49.tinypic.com/23r7qj5.png