我想将快速滚动功能(如在Android联系人应用程序或Whatsapp联系人中)添加到我的RecyclerView?
我也会使用列表视图,但我需要在相同布局的应用程序中使用Cards
!
如果实现快速滚动到Recyclerview太难了,那么使用ViewStub也是一种选择,或者不使用?
我的RecyclerViewAdapter:
public class SongRecyclerViewAdapter extends RecyclerView.Adapter<SongRecyclerViewAdapter.Holder> {
private Song[] sSongs;
public SongRecyclerViewAdapter(Song[] songs) {
sSongs = songs;
}
@Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_songview, parent, false);
Holder holder = new Holder(view);
return holder;
}
@Override
public void onBindViewHolder(Holder holder, int position) {
//holder.imvSong.setImageResource(R.drawable.standardartwork);
holder.txvSongTitle.setText(sSongs[position].getTitle());
holder.txvSongInfo.setText(sSongs[position].getArtists());
}
@Override
public int getItemCount() {
return sSongs != null ? sSongs.length : 0;
}
public class Holder extends RecyclerView.ViewHolder {
LinearLayout linearLayout;
ImageView imvSong;
TextView txvSongTitle;
TextView txvSongInfo;
public Holder(View layout) {
super(layout);
linearLayout = (LinearLayout) layout;
imvSong = (ImageView) layout.findViewById(R.id.imvSong);
txvSongTitle = (TextView) layout.findViewById(R.id.adap_txvSongtitle);
txvSongInfo = (TextView) layout.findViewById(R.id.txvSongInfo);
}
}
}
谢谢!
代码中的问题是注释行:
//holder.imvSong.setImageResource(R.drawable.standardartwork);
要处理此问题,您有两个解决方案:
1) 如果已知图像的数量有限,初始化时可以创建一次位图/绘图,然后只需要引用这些图像。
2) 创建一个位图缓存,智能的方式来解码位图以及可重用的位图池和池机制。这不是小事,这就是第三方图书馆为您所做的。我不建议你自己实施。