Re-viewing an Android fragment for different types of viewing does not work
I have different types of views using the recyclerview adapter, but the list is empty, this time the view is empty.
First implement the fragment
. Second, add recyclerview to the fragment.
Fragment Class
LocationAdapter locationAdapter = new LocationAdapter(getActivity(), locationList);
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
rvLocationList.setLayoutManager(layoutManager);
rvLocationList.setAdapter(locationAdapter);
Adapter class
public class LocationAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context mContext;
private ArrayList<LocationModel> locationlist;
private DataBaseHelper dataBaseHelper;
private OnItemClickListener onItemClickListener;
public final int EMPTY = 0;
public final int NOT_EMPTY = 1;
private String TAG = "LocationAdapter";
public LocationAdapter(Context context, ArrayList<LocationModel> list) {
this.mContext = context;
this.locationlist = list;
dataBaseHelper = new DataBaseHelper(context);
}
@Override
public int getItemViewType(int position) {
Log.d(TAG, "position = " + position);
if (locationlist.size() == 0) {
return EMPTY;
} else {
return NOT_EMPTY;
}
}
public void refreshData(ArrayList<LocationModel> tasks) {
locationlist.clear();
locationlist.addAll(tasks);
notifyDataSetChanged();
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
RecyclerView.ViewHolder viewHolder = null;
LayoutInflater inflater = LayoutInflater.from(mContext);
switch (viewType) {
case EMPTY:
View viewItem = inflater.inflate(R.layout.no_task_layout, parent, false);
viewHolder = new EmptyViewHolder(viewItem);
break;
case NOT_EMPTY:
View viewLoading = inflater.inflate(R.layout.location_list, parent, false);
viewHolder = new NotEmptyViewHolder(viewLoading);
break;
}
return viewHolder;
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
switch (getItemViewType(position)) {
case EMPTY:
EmptyViewHolder emptyViewHolder = (EmptyViewHolder) holder;
emptyViewHolder.ivNoItem.getLayoutParams().height = R.dimen._30sdp;
emptyViewHolder.ivNoItem.getLayoutParams().width = R.dimen._30sdp;
emptyViewHolder.tvNoitem.setText("No Location.");
emptyViewHolder.tvAddItem.setText("Add Location");
break;
case NOT_EMPTY:
break;
}
}
@Override
public int getItemCount() {
return locationlist == null ? 0 : locationlist.size();
}
public class NotEmptyViewHolder extends RecyclerView.ViewHolder {
private ImageView ivFirstCharecter, ivMore;
private TextView tvName, tvAddress;
NotEmptyViewHolder(View itemView) {
super(itemView);
ivFirstCharecter = itemView.findViewById(R.id.ivFirstCharecter);
ivMore = itemView.findViewById(R.id.ivMore);
tvName = itemView.findViewById(R.id.tvName);
tvAddress = itemView.findViewById(R.id.tvAddress);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.OnItemClick(locationlist.get(getAdapterPosition()).getLocationName());
}
});
}
}
public class EmptyViewHolder extends RecyclerView.ViewHolder {
private ImageView ivNoItem;
private TextView tvNoitem, tvAddItem;
EmptyViewHolder(View itemView) {
super(itemView);
ivNoItem = itemView.findViewById(R.id.ivNoItem);
tvNoitem = itemView.findViewById(R.id.tvNoitem);
tvAddItem = itemView.findViewById(R.id.tvAddItem);
}
}
public void setOnItemClickListener(OnItemClickListener itemClickListener) {
onItemClickListener = itemClickListener;
}
public interface OnItemClickListener {
void OnItemClick(String locationName);
}
}
No layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/llNoTask"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:id="@+id/ivNoItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="@drawable/ic_no_task" />
<TextView
android:id="@+id/tvNoitem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/semibold"
android:textColor="@color/black"
android:textSize="@dimen/_30sdp" />
<TextView
android:id="@+id/tvAddItem"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/regular"
android:textColor="@color/text_gray"
android:textSize="@dimen/_18sdp" />
Fragment Layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.RecyclerView
android:id="@+id/rvLocationList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="@dimen/_60sdp" />
<android.support.design.widget.FloatingActionButton
android:id="@+id/fbtnAddLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="@dimen/_10sdp"
android:gravity="center_vertical"
app:backgroundTint="@color/Red"
app:fabSize="normal"
app:srcCompat="@drawable/ic_add" />
Main activity
fragment = new LocationFragment();
try {
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
} catch (IllegalStateException ieEx) {
ieEx.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
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