在更改我的代码(第一次尝试)后,我遇到了类似的问题。我已经更新了我的 getView() 以执行正确的方式。
@Override
public View getView( int position, View convertView, ViewGroup parent ) {
Resources res = activity.getResources();
if( convertView == null ) {
LayoutInflater vi = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate( R.layout.video_gallery_item, parent, false );
}
Bitmap bmp = getBitmap( videoIds[ position ] );
/* This layer drawable will create a border around the image. This works */
Drawable[] layers = new Drawable[ 2 ];
layers[ 0 ] = new BitmapDrawable( res, bmp );
layers[ 1 ] = res.getDrawable( R.drawable.border_selected );
LayerDrawable layerDrawable = new LayerDrawable( layers );
/* Create the StateListDrawable */
StateListDrawable drawable = new StateListDrawable();
drawable.addState( StateSet.WILD_CARD, new BitmapDrawable( res, bmp ) );
drawable.addState( new int[]{ android.R.attr.state_checked, android.R.attr.state_selected }, layerDrawable );
ImageView v = (ImageView)convertView.findViewById( R.id.image );
v.setImageDrawable( drawable );
v.setAdjustViewBounds( true );
thumbnails[ position ] = bmp;
return convertView;
}
这个适配器正在一个名为 videoGallery的GridView上使用:
videoGallery.setChoiceMode( GridView.CHOICE_MODE_MULTIPLE_MODAL );
videoGallery.setMultiChoiceModeListener( new MultiChoiceModeListener() { ... }
我遇到的问题是,通过长按在 GridView 上选择图像时图像不会改变。操作栏发生变化,我的上下文菜单出现等。我还尝试通过 XML 创建 StateListDrawable,结果相同。想法?
更新
改变
drawable.addState( new int[]{ android.R.attr.state_checked, android.R.attr.state_selected }, layerDrawable );
至
drawable.addState( StateSet.WILD_CARD, layerDrawable );
在我的 getView() 中显示了我正在寻找的边框。那么也许 StateListDrawable 没有得到状态变化?有人有什么想法吗?