从另一个回收器适配器类的onClick()调用方法以执行回收器视图的函数
从另一个回收器适配器类的onClick()调用方法以执行回收器视图的函数
提问于 2019-06-05 06:07:00
我有一个片段HomeFragment，它有两个回收器视图，两个回收器视图都有独立的适配器: 1.为了显示类别(这些是从api中检索的)，我在http中使用了fetchCat() 2.为了使用带有类别id的http调用来获取这些类别的提要，我在HomeFragment片段中使用fetchFeed(categoryid)；我被困在如何从category adapters访问HomeFragment中的垂直回收器视图方法。我需要知道哪个类别被点击了，我必须调用一个驻留在HomeFragment中的方法。
public class CateogoryAdapter extends RecyclerView.Adapter<CateogoryAdapter.CateogoryViewHolder>{
List<CateogoryList> cateogoryLists;
Context context;
public CateogoryAdapter(List<CateogoryList> cateogoryLists, Context context) {
this.cateogoryLists = cateogoryLists;
this.context = context;
}
@NonNull
@Override
public CateogoryViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(context).inflate(R.layout.horizontal_list, viewGroup, false);
CateogoryViewHolder cateogoryViewHolder = new CateogoryViewHolder(view);
return cateogoryViewHolder;
}
@Override
public void onBindViewHolder(@NonNull final CateogoryViewHolder cateogoryViewHolder, int i) {
cateogoryViewHolder.cateogrylist.setText(cateogoryLists.get(i).getCategory());
Glide.with(context)
.load(cateogoryLists.get(i).getImage())
.into(cateogoryViewHolder.images);
cateogoryViewHolder.images.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
((Home)fragment).ruleName(position);
}
});
}
@Override
public int getItemCount() {
return cateogoryLists.size();
}
public class CateogoryViewHolder extends RecyclerView.ViewHolder{
TextView cateogrylist;
CircleImageView images;
public CateogoryViewHolder(@NonNull View itemView) {
super(itemView);
cateogrylist = (TextView)itemView.findViewById(R.id.cateogory);
images = (CircleImageView)itemView.findViewById(R.id.catimg);
}
}}
要调用的HomeFragment上的方法
private void fetchFeedJson(Integer startVal) {
progressBar.setVisibility(View.GONE);
shimmerFrameLayout.startShimmer();
Integer studentid = PrefManager.getInstance(getContext()).getUser().getStudentid();
Call<List<FeedList>> call = RetrofitClient
.getInstance()
.getApi()
.fetchFeed(studentid, startVal);
call.enqueue(new Callback<List<FeedList>>() {
@Override
public void onResponse(Call<List<FeedList>> call, Response<List<FeedList>> response) {
List<FeedList> feed = response.body();
feedAdapter = new FeedAdapter(feed, getContext());
feedRecyclerView.setLayoutManager(manager);
feedRecyclerView.setAdapter(feedAdapter);
feedAdapter.notifyDataSetChanged();
shimmerFrameLayout.setVisibility(View.GONE);
}
@Override
public void onFailure(Call<List<FeedList>> call, Throwable t) {
Toast.makeText(getContext(), "Some Error Occured", Toast.LENGTH_SHORT).show();
shimmerFrameLayout.setVisibility(View.GONE);
}
});
}回答 1
Stack Overflow用户
回答已采纳
发布于 2019-06-05 08:51:45
第一件事是将您的方法fetchFeedJson声明为公共
public void fetchFeedJson(Integer startVal) {
......
}然后，您可以使用多种方法来完成此操作
第一个示例：HomeFagment中的
class HomeFragment extends Fragment{
public static HomeFragment homeFragment;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_past_cycle, container, false);
homeFragment = this;
return view ;
}
public void fetchFeedJson(Integer startVal) {
......
}
}在你的适配器中，像这样调用你的方法
cateogoryViewHolder.images.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
((Home)fragment).ruleName(position);
HomeFragment.homeFragment.fetchFeedJson(Integer.valueOf(position));
}
});第二个示例
将主片段实例作为参数传递给适配器，如下所示
List<CateogoryList> cateogoryLists;
Context context;
HomeFragment homeFragment;
public CateogoryAdapter(List<CateogoryList> cateogoryLists, Context context , HomeFragment homeFragment)
{
this.cateogoryLists = cateogoryLists;
this.context = context;
this.homeFragment = homeFragment;
}在你的监听者里面：
cateogoryViewHolder.images.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v){
((Home)fragment).ruleName(position);
this.homeFragment.fetchFeedJson(Integer.valueOf(position));
}
});页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56451935
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