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[英]Adapter onCreateViewHolder and onBindViewHolder methods are not getting called in RecyclerView?
[英]RecyclerView Adapter methods not called
我有這個奇怪的問題,我的適配器沒有調用任何方法..構造函數工作,它停在那里,如果我有一個斷點,但從那里,沒有.. onCreateViewHolder
沒有被調用,既沒有onBindViewHolder
,甚至沒有getItemCount
..我嘗試了我在網上找到的所有東西,但似乎沒有任何工作,所以我不知道該怎么做。 有什么建議么? 這是我的代碼:片段:
public class FragmentPackageDetails extends Fragment {
//other vars
RecyclerView rvPackageDetails;
DatabaseHandler database;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Bundle args = getArguments();
String temp = args.getString(KEY_TRACKER_CODE);
View v = inflater.inflate(R.layout.fragment_package_details_new, container, false);
return v;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
rvPackageDetails = (RecyclerView) view.findViewById(R.id.rvPackageDetails);
rvPackageDetails.setLayoutManager(new LinearLayoutManager(getActivity()));
database = new DatabaseHandler(getActivity());
selectedPackage = database.getPackage(trackerCode);
RecyclerView.Adapter adapter = new MyAdapter(selectedPackage.getRecords());
rvPackageDetails.setAdapter(adapter);
}
//other methods in class
}
MyAdapter
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private ArrayList<TrackingRecordCheckedOut> mDataset;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public TextView tvPackageDetailsRowDayOfWeek, tvPackageDetailsRowDayOfMonth, tvPackageDetailsRowNameOfMonth,
tvPackageDetailsRowDetailsTitle, tvPackageDetailsRowDetailsDescription, tvPackageDetailsRowDetialsTime;
public ViewHolder(View v) {
super(v);
tvPackageDetailsRowDayOfWeek = (TextView) v.findViewById(R.id.tvPackageDetailsRowDayOfWeek);
tvPackageDetailsRowDayOfMonth = (TextView) v.findViewById(R.id.tvPackageDetailsRowDayOfMonth);
tvPackageDetailsRowNameOfMonth = (TextView) v.findViewById(R.id.tvPackageDetailsRowNameOfMonth);
tvPackageDetailsRowDetailsTitle = (TextView) v.findViewById(R.id.tvPackageDetailsRowDetialsTime);
tvPackageDetailsRowDetailsDescription = (TextView) v.findViewById(R.id.tvPackageDetailsRowDetailsDescription);
tvPackageDetailsRowDetialsTime = (TextView) v.findViewById(R.id.tvPackageDetailsRowDetialsTime);
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public MyAdapter(ArrayList<TrackingRecordCheckedOut> myDataset) {
mDataset = myDataset;
}
// Create new views (invoked by the layout manager)
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_list_item, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
TrackingRecordCheckedOut tr = mDataset.get(position);
holder.tvPackageDetailsRowDayOfWeek.setText(tr.getDayOfWeek());
holder.tvPackageDetailsRowDayOfMonth.setText(tr.getDayOfWeek());
holder.tvPackageDetailsRowNameOfMonth.setText(tr.getMonthOfYear());
holder.tvPackageDetailsRowDetailsTitle.setText(tr.getTitle());
holder.tvPackageDetailsRowDetailsDescription.setText(tr.getDetails());
holder.tvPackageDetailsRowDetialsTime.setText(tr.getTimeOfDay());
}
// Return the size of your dataset (invoked by the layout manager)
@Override
public int getItemCount() {
return mDataset.size();
}
}
片段布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/rvPackageDetails"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
RecyclerView行布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/llPackageDetailsRecyclerViewRow"
android:layout_width="match_parent"
android:layout_height="96dip"
android:orientation="horizontal"
android:weightSum="100">
<LinearLayout
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="20"
android:orientation="vertical"
android:weightSum="10">
<TextView
android:id="@+id/tvPackageDetailsRowDayOfWeek"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="3"/>
<TextView
android:id="@+id/tvPackageDetailsRowDayOfMonth"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="4"/>
<TextView
android:id="@+id/tvPackageDetailsRowNameOfMonth"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="3"/>
</LinearLayout>
<LinearLayout
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="80"
android:orientation="vertical">
<TextView
android:id="@+id/tvPackageDetailsRowDetailsTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="3"/>
<TextView
android:id="@+id/tvPackageDetailsRowDetailsDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="4"/>
<TextView
android:id="@+id/tvPackageDetailsRowDetialsTime"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="3"/>
</LinearLayout>
</LinearLayout>
我看了你的代碼不幸的是沒有真正看到一個問題。 可能有問題的一點是,在ViewHolder構造函數中,您調用super(v)。 您可能需要調用super((LinearLayout)v)。 但這可能沒什么區別。
祝好運!
我有同樣的問題,其中既沒有調用onCreateViewHolder,也沒有調用onBindViewHolder。 在Adapter的構造函數中保存對Context的引用,然后更改onCreateViewHolder方法以使用保存的Context語句而不是parent.getContext()來修復它:
private Context mContext;
public MyAdapter(Context context, ArrayList<TrackingRecordCheckedOut> myDataset) {
mDataset = myDataset;
mContext = context;
}
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
// create a new view using saved reference to Context (mContext)
View v = LayoutInflater.from(mContext).inflate(R.layout.recyclerview_list_item, parent, false);
// set the view's size, margins, paddings and layout parameters
ViewHolder vh = new ViewHolder(v);
return vh;
}
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