我在带有自定义 CursorAdapter 的 LoaderManager 中使用 CursorLoader。我已经实现了显示专辑和相关艺术家,现在我想显示封面。
这是我的自定义光标适配器:
public class AlbumsAdapter extends CursorAdapter {
private final LayoutInflater mInflater;
public AlbumsAdapter(Context context, Cursor c) {
super(context, c);
mInflater=LayoutInflater.from(context);
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView albumTitle =(TextView)view.findViewById(R.id.albumTextView);
albumTitle.setText(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM)));
TextView artistName=(TextView)view.findViewById(R.id.artistTextView);
artistName.setText(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ARTIST)));
ImageView albumCover=(ImageView)view.findViewById(R.id.artistTextView);
// Here what should I do ?
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
final View view=mInflater.inflate(R.layout.albums_row,parent,false);
return view;
}
}
我尝试了以下方法但没有成功:
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ART));
File imgFile = new File(path);
if(imgFile.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
ImageView albumCover=(ImageView)view.findViewById(R.id.album_cover);
albumCover.setImageBitmap(myBitmap);
}
MediaStore.Audio.Albums.ALBUM_ART返回什么以及如何使用它来使 ImageView 遮盖?谢谢。
我已经实现了在ImageViews
中加载专辑封面:
String coverPath = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ART));
Drawable img = Drawable.createFromPath(coverPath);
ImageView coverAlbum=(ImageView)view.findViewById(R.id.album_cover);
coverAlbum.setImageDrawable(img);
问题是列表非常慢。我想我应该缩小封面的分辨率以消耗更少的内存。