Implement a RecyclerView in a Fragment

Question

I trying to create a ListView in a Fragment within a ViewPager in a AppCompatActivity. In the AppCompatActivity are all view elements are wrappend in a CoordinatorLayout. Because I used the CoordinatorLayout. I have to use a RecylerView I am trying to follow the training from developer.android.com, but my application stopped after my log. This is my code in myFragment where the applications stopped.

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

//...

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_city_list, container, false)

    mRecyclerView = (RecyclerView) view.findViewById(android.R.id.list);
    mLayoutManager = new LinearLayoutManager(this.getActivity());
    Log.d("debugMode", "The application stopped after this");
    mRecyclerView.setLayoutManager(mLayoutManager);

    mAdapter = new RecyclerAdapter(getNames());
    mRecyclerView.setAdapter(mAdapter);
    return view;
}

//...

Solution

Use this

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_city_list, container, false)

    // Replace 'android.R.id.list' with the 'id' of your RecyclerView
    mRecyclerView = (RecyclerView) view.findViewById(android.R.id.list);
    mLayoutManager = new LinearLayoutManager(this.getActivity());
    Log.d("debugMode", "The application stopped after this");
    mRecyclerView.setLayoutManager(mLayoutManager);

    mAdapter = new RecyclerAdapter(getNames());
    mRecyclerView.setAdapter(mAdapter);
    return view;
}

You should call the setLayoutManager & setAdapter methods (respectively) on the Recyclerview.

Plus,

mRecyclerView = (RecyclerView) view.findViewById(android.R.id.list);

you should not use android.R.id.list, as you're not using a ListFragment. Replace it with the id of you Recyclerview (as in your XML layout).

Comments

[user3432681]

Woww Thank you! it was very late i didn't see that R.id.list did not reference to my list! I was stuck for hours!

[TheCoderGuy]

I have an question where does the getNames come from ?

[Mohammed Aouf Zouag]

getNames() is a method that returns the list of data to populate the RecyclerView