[英]Recycler view: no adapter attached; skipping layout(Error in recycler view for API )
[英]Error in sending Arraylist to Adapter in Recycler view in Android
我有一个arraylist
CastArrayList
,其中数据被添加到Volley
的onResponse
方法中,从那里我想检查CastArrayList
的大小是否大于7,另一个arraylist subCastArrayList
将CastArraylist
从位置0复制到7并将其发送到RecyclerView
但是没有在RecyclerView
获得任何视图。 我想如果CastArrayList
大小大于7, SubCastArrayList
应该复制前7个元素,否则复制整个CastArrayList
,然后将SubCastArrayList
发送到adapter
。
ArrayList<Cast> castArrayList;
ArrayList<Cast> subCastArrayList;
castArrayList = new ArrayList<>();
subCastArrayList = new ArrayList<>();
castDetailAdapter = new
CastDetailAdapter(MovieView.this,castArrayList,subCastArrayList);
RecyclerView.LayoutManager mLayoutManager = new
StaggeredGridLayoutManager(1,StaggeredGridLayoutManager.HORIZONTAL);
recycler_view.setLayoutManager(mLayoutManager);
recycler_view.setItemAnimator(new DefaultItemAnimator());
recycler_view.setAdapter(castDetailAdapter);
StringRequest stringRequest1 = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
int i;
for (i=0;i<movieDetailFull.getCredits().getCast().size();i++) {
Cast cast = new Cast();
cast.setName(movieDetailFull.getCredits().getCast().get(i).getName());
cast.setId(movieDetailFull.getCredits().getCast().get(i).getId());
castArrayList.add(i,cast);
castDetailAdapter.notifyDataSetChanged();
}
}
if (castArrayList.size() > 7) {
subCastArrayList = new ArrayList<Cast>
(castArrayList.subList(0,6));
castDetailAdapter.notifyDataSetChanged();
}
else {
subCastArrayList = new ArrayList<Cast>(castArrayList);
castDetailAdapter.notifyDataSetChanged();
}
您正在通过创建新的arraylist来更改subCastArrayList
列表的引用现在subCastArrayList
和适配器中的列表是对不同列表的两个不同引用
所以只需添加元素即可
subCastArrayList.clear();
// ^^^ clear the list instead of creating new one inside if or else
if (castArrayList.size() > 7)
{
//subCastArrayList.addAll(castArrayList.subList(0,6));
subCastArrayList.addAll(castArrayList.subList(0,7));
// upper range is exclusive so use ^
}else{
subCastArrayList.addAll(castArrayList);
}
castDetailAdapter.notifyDataSetChanged();
// move notify outside , avoid redundant statements
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