回收者视图未显示在片段中

Question

I have three fragments: Fragment user , Fragment Home and Fragment Progress .

I'm trying to implement a recylcer view in the homefragment that can recycle images in the recycler view nothing is happening and no error is showing in logcat, i don't know what i'm doing wrong.

1.This is my Custom Adapter:

import android.content.Context;
import android.support.annotation.NonNull;
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.Collections;
import java.util.List;

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.MyViewHolder>{
@NonNull

private LayoutInflater inflator;
List<Information> data= Collections.emptyList();

public CustomAdapter(Context context, List<Information> data){
    inflator= LayoutInflater.from(context);
}
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view=inflator.inflate(R.layout.customlayout, parent,false);
    MyViewHolder holder=new MyViewHolder(view);
    return holder;
}

@Override
public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {

    Information current=data.get(position);
    holder.icon.setImageResource(current.images);
    holder.title.setText(current.title);

}

@Override
public int getItemCount() {
    return 0;
}

class MyViewHolder extends RecyclerView.ViewHolder{

    ImageView icon;
    TextView title;
    public MyViewHolder(View itemView) {
        super(itemView);

        icon = (ImageView) itemView.findViewById(R.id.listicon);
        title = (TextView) itemView.findViewById(R.id.textView);
    }
}
}

2. This is my Fragment

    import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.SimpleAdapter; import java.util.ArrayList; import java.util.HashMap; import java.util.List; public class HomeFragment extends Fragment { private static final String ARG_PARAM1 = "param1"; private static final String ARG_PARAM2 = "param2"; private CustomAdapter adapter; int[] IMAGES = {R.drawable.abs,R.drawable.arms,R.drawable.back,R.drawable.chest,R.drawable.full,R.drawable.legs}; private RecyclerView recyclerView; ArrayList<HashMap<String, String>> data; private String mParam1; private String mParam2; public HomeFragment() { } public static HomeFragment newInstance(String param1, String param2) { HomeFragment fragment = new HomeFragment(); Bundle args = new Bundle(); args.putString(ARG_PARAM1, param1); args.putString(ARG_PARAM2, param2); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { mParam1 = getArguments().getString(ARG_PARAM1); mParam2 = getArguments().getString(ARG_PARAM2); } } public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View layout = inflater.inflate(R.layout.fragment_home, container, false); recyclerView =(RecyclerView) layout.findViewById(R.id.drawerList); adapter = new CustomAdapter(getActivity(), getData()); recyclerView.setAdapter(adapter); recyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); return layout; } public static List<Information> getData(){ List<Information> data = new ArrayList<>(); int [] icons = {R.drawable.abs,R.drawable.arms,R.drawable.back,R.drawable.chest,R.drawable.full,R.drawable.legs}; String[] titles={"Abs","Arms","Back","Chest","full","legs"}; for (int i=0; i<icons.length && i<titles.length;i++){ Information current = new Information(); current.images=icons[i]; current.title=titles[i]; data.add(current); } return data; } } 

I can't see to find what I'm doing wrong.

1. fragmenthome.xml

    <?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".HomeFragment"> <android.support.v7.widget.RecyclerView android:id="@+id/drawerList" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentStart="true" android:layout_alignParentTop="true" android:layout_alignParentLeft="true"> </android.support.v7.widget.RecyclerView> </FrameLayout> 

4.Custom_layout.xml

    <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">


<ImageView
    android:id="@+id/listicon"
    android:layout_width="match_parent"
    android:layout_height="150dp"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    app:srcCompat="@mipmap/ic_launcher" />

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="62dp"
    android:text="TextView" />

Answer 1

you didnt assign the data in your adapter's constructor

this.data = data;

then your item count should be

  data.size(); 

should not be 0.