我开发了一个应用程序,其中有两个帖子
>使用毕加索的图片文章
>使用Youtube Api的视频帖子.
我已经使用RecyclerView和Firebase recyclerAdapter实现了这两个问题,但问题是我不知道如何区分两个视图,如果我使用Youtube Api使用视频视图它附加了图像视图并且还复制到recyclerView中的所有项目,然后所有项目中只播放一个视频.我想要的是,如果我想要显示图像,那么该项目只能获取图像,如果我想显示视频,那么reyclerView项目只能获得视频而不重复.喜欢Instagram.我搜索了很多论坛,但没有得到任何帮助.请帮忙.我使用Firebase作为我的数据库,ViewHolders就是根据这个.
FirebaseRecyclerAdapter <post,postViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<post,postViewHolder>(
post.class,R.layout.post_row_recycle_home,postViewHolder.class,mDatabaseReference
) {
@Override
protected void populateViewHolder(postViewHolder viewHolder,post model,int position) {
viewHolder.setimage(getApplicationContext(),model.getImage());
viewHolder.setYoutube(model.getYoutube());
}
};
mrecyclerView.setAdapter(firebaseRecyclerAdapter);
持有人：
public static class postViewHolder extends RecyclerViewPager.ViewHolder{
View mView;
public postViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setYoutube(final String youtube){
final YouTubePlayerView youPlay = (YouTubePlayerView) mView.findViewById(R.id.youtuber);
youPlay.initialize("SOME KEY",new YouTubePlayer.OnInitializedListener() {
@Override
public void onInitializationSuccess(YouTubePlayer.Provider provider,YouTubePlayer youTubePlayer,boolean b) {
youTubePlayer.cueVideo(youtube);
}
@Override
public void onInitializationFailure(YouTubePlayer.Provider provider,YouTubeInitializationResult youTubeInitializationResult) {
}
});
}
public void setimage(final Context ctx,final String image){
final ImageView post_image = (ImageView)mView.findViewById(R.id.post_image);
Picasso.with(ctx).load(image)
.networkPolicy(NetworkPolicy.OFFLINE).into(post_image,new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
Picasso.with(ctx).load(image).into(post_image);
}
});
}
}
截屏示例：
解决方法
您可以决定使用适配器getItemViewType方法显示哪种类型的视图.在firebaseRecyclerAdapter里面添加以下内容：
private static final int TYPE_YOUTUBE = 1111;
private static final int TYPE_IMAGE = 2222;
@Override
public int getItemViewType(int position) {
//note: classes should start with uppercase
Post model = getItem(position);
if (model.isYoutube()) { //note: you'll have to define this method
return TYPE_YOUTUBE;
} else {
return TYPE_IMAGE;
}
}
然后在onCreateViewHolder中检查要创建的类型：
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
RecyclerView.ViewHolder holder;
switch (viewType) {
case TYPE_YOUTUBE:
//note: save an inflater when you construct the adapter
return new YtViewHolder(inflater.inflate(R.layout.item_youtube,parent,false));
case TYPE_IMAGE:
return new ImgViewHolder(inflater.inflate(R.layout.item_image,false));
}
}
分开你的VH模型：
public abstract class PostViewHolder extends RecyclerView.ViewHolder { //note: extends changed
public abstract void bind(final String input){
}
public static class YtViewHolder extends PostViewHolder { //note: extends changed
private YouTubePlayerView mView;
public YtViewHolder(View itemView) {
super(itemView);
mView = (YouTubePlayerView) itemView.findViewById(R.id.youtuber);
}
public void bind(final String youtube){
mView.initialize("SOME KEY",boolean b) {
youTubePlayer.cueVideo(youtube);
}
@Override
public void onInitializationFailure(YouTubePlayer.Provider provider,YouTubeInitializationResult youTubeInitializationResult) {
}
});
}
}
public static class ImgViewHolder extends PostViewHolder {
private ImageView mView;
public ImageView(View itemView) {
super(itemView);
mView = (ImageView) itemView.findViewById(R.id.post_image);
}
public void bind(final String image){
Picasso.with(mView.getContext()).load(image).networkPolicy(NetworkPolicy.OFFLINE).into(mView,new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
Picasso.with(ctx).load(image).into(mView);
}
});
}
}
您的populate方法可以简化如下：
@Override
protected void populateViewHolder(PostViewHolder viewHolder,int position) {
viewHolder.bind(model.isYoutube()? model.getYoutube() : model.getImage());
}
不同的项目：
then there is only one video playing in all items
这有点令人担忧.如果我理解正确,列表中的每个项目都具有相同的图像和视频.这可能意味着您将相同的模型返回到每个位置.确保如果实现getItem,则为每个位置返回不同的项目(Firebase适配器默认情况下会执行此操作).还要确保model.getYoutube等不返回静态数据.
