我有一个recyclerview适配器,每个视图都有一个按钮。我想实现一个fuc = nctionality,这样如果我点击任何视图上的按钮,应该更新recyclerview的所有视图。如何实现这一目标? 这就是我在onBindViewHolder
中所做的 public class StoryItemAdapter extends RecyclerView.Adapter<StoryItemAdapter.ViewHolder> {
LayoutInflater inflater;
Context context;
Bitmap bm;
ImageLoader imloader;
static ArrayList<StoryDetails> stories;
OnItemClickListener mItemClickListener;
public StoryItemAdapter(Context context,ArrayList<StoryDetails> stories) {
this.context = context;
this.stories = stories;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
imloader = ImageLoader.getInstance();
imloader.init(ImageLoaderConfiguration.createDefault(context));
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public int getItemCount() {
return stories != null ? stories.size() : 0;
}
@SuppressWarnings("deprecation")
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
if(stories.get(position).getType()==null) {
holder.user_handle.setText(stories.get(position).getUsername() + "( " + stories.get(position).getHandle() + " )");
File file = imloader.getDiscCache().get(stories.get(position).getImage());
if (!file.exists()) {
DisplayImageOptions options = new DisplayImageOptions.Builder()
.cacheOnDisc()
.build();
imloader.displayImage(stories.get(position).getImage(), holder.image, options);
} else {
holder.image.setImageURI(Uri.parse(file.getAbsolutePath()));
}
holder.about.setText(stories.get(position).getAbout());
holder.followers.setText("Followers\n\r" + stories.get(position).getFollowers());
holder.following.setText("Following\n\r" + stories.get(position).getFollowing());
}
else
{
holder.user_handle.setText(stories.get(position).getTitle());
File file = imloader.getDiscCache().get(stories.get(position).getSi());
if (!file.exists()) {
DisplayImageOptions options = new DisplayImageOptions.Builder()
.cacheOnDisc()
.build();
imloader.displayImage(stories.get(position).getSi(), holder.image, options);
} else {
holder.image.setImageURI(Uri.parse(file.getAbsolutePath()));
}
holder.about.setText(stories.get(position).getDescription());
holder.followers.setText("Likes \n\r" + stories.get(position).getLikes_count());
holder.following.setText("Comments \n\r" + stories.get(position).getComment_count());
}
if(stories.get(position).getIs_following())
{
holder.follow.setText("Following");
}
else
holder.follow.setText("Follow");
final int p = position;
final ViewHolder h = holder;
holder.follow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(stories.get(p).getIs_following())
{
stories.get(p).setIs_following(false);
h.follow.setText("Follow");
}
else {
stories.get(p).setIs_following(true);
h.follow.setText("Following");
}
for(int i =0;i <stories.size();i++) {
if (stories.get(p).getDb() != null) {
if(stories.get(p).getDb().equals(stories.get(i).getId()))
{
stories.get(p).setIs_following(stories.get(i).getIs_following());
}
}
}
}
});
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.story_adapter, viewGroup,
false);
return new ViewHolder(itemView);
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ImageView image;
TextView user_handle, about, followers,following,userSince;
Button follow;
public ViewHolder(View itemView) {
super(itemView);
user_handle = (TextView) itemView.findViewById(R.id.user_handle);
about = (TextView) itemView.findViewById(R.id.about);
followers = (TextView) itemView.findViewById(R.id.followers);
following = (TextView) itemView.findViewById(R.id.following);
// userSince = (TextView) itemView.findViewById(R.id.user_since);
image = (ImageView) itemView.findViewById(R.id.user_image);
follow =(Button) itemView.findViewById(R.id.follow);
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
image.setLayoutParams(rlp);
image.setAdjustViewBounds(true);
image.setScaleType(ImageView.ScaleType.FIT_CENTER);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(v, getPosition());
}
}
}
public interface OnItemClickListener {
public void onItemClick(View view , int position);
}
public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
}
答案 0 :(得分:0)
您需要通知适配器有关更改的任何数据集。
试试这个..
holder.follow.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(stories.get(p).getIs_following())
{
stories.get(p).setIs_following(false);
h.follow.setText("Follow");
}
else {
stories.get(p).setIs_following(true);
h.follow.setText("Following");
}
for(int i =0;i <stories.size();i++) {
if (stories.get(p).getDb() != null) {
if(stories.get(p).getDb().equals(stories.get(i).getId()))
{
stories.get(p).setIs_following(stories.get(i).getIs_following());
}
}
}
notifyDataSetChanged();
}