New to Android, I used the code from https://github.com/tutsplus/Android-CardViewRecyclerView which is working perfectly.
But when I created Fragment out of it, it is displaying nothing.
CardViewFrag.java
package com.androidatc.customviewindrawer; import android.app.Activity; import android.app.Fragment; import android.net.Uri; import android.os.Bundle; import android.widget.ImageView; import android.widget.TextView; public class CardViewFrag extends Fragment { TextView personName; TextView personAge; ImageView personPhoto; protected void onCreateView(Bundle savedInstanceState) { getActivity().setContentView(R.layout.cardview_activity); personName = (TextView)getActivity().findViewById(R.id.person_name); personAge = (TextView)getActivity().findViewById(R.id.person_age); personPhoto = (ImageView)getActivity().findViewById(R.id.person_photo); personName.setText("Emma Wilson"); personAge.setText("23 years old"); personPhoto.setImageResource(R.drawable.emma); } public interface OnFragmentInteractionListener { // TODO: Update argument type and name public void onFragmentInteraction(Uri uri); } } RecyclerViewFrag.java
package com.androidatc.customviewindrawer; import android.app.Activity; import android.app.Fragment; import android.net.Uri; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import java.util.ArrayList; import java.util.List; public class RecyclerViewFrag extends Fragment { public List<Person> persons; public RecyclerView rv; public void onCreateView(Bundle savedInstanceState) { getActivity().setContentView(R.layout.recyclerview_activity); rv=(RecyclerView)getActivity().findViewById(R.id.rv); LinearLayoutManager llm = new LinearLayoutManager(getActivity()); rv.setLayoutManager(llm); rv.setHasFixedSize(true); initializeData(); initializeAdapter(); } public interface OnFragmentInteractionListener { // TODO: Update argument type and name public void onFragmentInteraction(Uri uri); } public void initializeData(){ persons = new ArrayList<>(); persons.add(new Person("Emma Wilson", "23 years old", R.drawable.emma)); persons.add(new Person("Lavery Maiss", "25 years old", R.drawable.lavery)); persons.add(new Person("Lillie Watts", "35 years old", R.drawable.lillie)); } public void initializeAdapter(){ RVAdapter adapter = new RVAdapter(persons); rv.setAdapter(adapter); } } RVAdapter.java
package com.androidatc.customviewindrawer; import android.support.v7.widget.CardView; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import java.util.List; public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> { public static class PersonViewHolder extends RecyclerView.ViewHolder { CardView cv; TextView personName; TextView personAge; ImageView personPhoto; PersonViewHolder(View itemView) { super(itemView); cv = (CardView)itemView.findViewById(R.id.cv); personName = (TextView)itemView.findViewById(R.id.person_name); personAge = (TextView)itemView.findViewById(R.id.person_age); personPhoto = (ImageView)itemView.findViewById(R.id.person_photo); } } List<Person> persons; RVAdapter(List<Person> persons){ this.persons = persons; } @Override public void onAttachedToRecyclerView(RecyclerView recyclerView) { super.onAttachedToRecyclerView(recyclerView); } @Override public PersonViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item, viewGroup, false); PersonViewHolder pvh = new PersonViewHolder(v); return pvh; } @Override public void onBindViewHolder(PersonViewHolder personViewHolder, int i) { personViewHolder.personName.setText(persons.get(i).name); personViewHolder.personAge.setText(persons.get(i).age); personViewHolder.personPhoto.setImageResource(persons.get(i).photoId); } @Override public int getItemCount() { return persons.size(); } } I am calling this from Navigation drawer.
private void loadFragmentLayout(int position) { // update the main content by replacing fragments Fragment fragment = null; switch (position) { case 0: fragment = new CardViewFrag(); break; case 1: fragment = new BarCodeFrag(); break; case 2: fragment = new SearchBookFrag(); break; case 3: fragment = new LoginFrag(); break; case 4: fragment = new MyAccFrag(); break; default: break; } My MainActivity file is quite big, but every time I add a fragment, I just mention that it implements OnFragmentInteractionListener. If my Activity is working for all fragments except this one, there should not be any reason - why it is not working for this Frag.
RecyclerViewFrag.OnFragmentInteractionListener, CardViewFrag.OnFragmentInteractionListener
public class MainActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks, SearchCatFragment.OnFragmentInteractionListener, // AndroidBarcodeQrExample.OnFragmentInteractionListener, BarCodeFrag.OnFragmentInteractionListener, LoginFrag.OnFragmentInteractionListener, HomeFrag.OnFragmentInteractionListener, MainViewFragment.OnFragmentInteractionListener, SearchBookFrag.OnFragmentInteractionListener, SearchBookFragment.OnFragmentInteractionListener, MyAccFrag.OnFragmentInteractionListener, RecyclerViewFrag.OnFragmentInteractionListener, CardViewFrag.OnFragmentInteractionListener Any idea - why in Fragment no display?
cardview_activity and recyclerview_activity remain the views without any changes.
cardview_activity.xml
<?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:padding="16dp" > <android.support.v7.widget.CardView android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/cv" > <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="16dp" > <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/person_photo" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginRight="16dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/person_name" android:layout_toRightOf="@+id/person_photo" android:layout_alignParentTop="true" android:textSize="30sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/person_age" android:layout_toRightOf="@+id/person_photo" android:layout_below="@+id/person_name" /> </RelativeLayout> </android.support.v7.widget.CardView> </LinearLayout> recyclerview_activity.xml
<?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:padding="16dp" > <android.support.v7.widget.RecyclerView android:layout_height="match_parent" android:layout_width="match_parent" android:id="@+id/rv" > </android.support.v7.widget.RecyclerView> </LinearLayout> This question may be asked a couple of times but none of the solution helped me.
Many thanks.