RecyclerView with SwipeRefreshLayout, Loading, and Error Message

RecyclerLoadingView.java

import android.content.Context;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.FrameLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

import ph.mobext.core.base.app.R;

public class RecyclerLoadingView extends FrameLayout implements
        SwipeRefreshLayout.OnRefreshListener {

    private static final String TAG = RecyclerLoadingView.class.getSimpleName();
    private RecyclerView recyclerView;
    private ProgressBar progressBar;
    private TextView textView;
    private SwipeRefreshLayout swipeRefresh;
    private ListLoadingViewListener listener;
    private LinearLayoutManager layoutManager;
    private boolean isSwipeEnabled;

    private RecyclerView.OnScrollListener onScrollListener = new RecyclerView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
            if (isSwipeEnabled) {
                swipeRefresh.setEnabled(layoutManager.findFirstCompletelyVisibleItemPosition() == 0);
            }
        }
    };
    private RecyclerView.Adapter adapter;


    public interface ListLoadingViewListener {
        void onRefresh();
    }

    public RecyclerLoadingView(Context context) {
        super(context);
    }

    public RecyclerLoadingView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context, attrs);
    }

    private void initView(Context context, AttributeSet attrs) {
        swipeRefresh = (SwipeRefreshLayout) LayoutInflater.from(context).inflate(R.layout.view_list_loading, this, false);
        addView(swipeRefresh);
        recyclerView = (RecyclerView) swipeRefresh.findViewById(R.id.list_loading_recyclerview);
        recyclerView.setOnScrollListener(onScrollListener);
        layoutManager = new LinearLayoutManager(context);
        recyclerView.setLayoutManager(layoutManager);

        progressBar = (ProgressBar) swipeRefresh.findViewById(R.id.list_loading_progress);

        textView = (TextView) swipeRefresh.findViewById(R.id.list_loading_text);

        swipeRefresh.setOnRefreshListener(this);
    }

    public void showLoading() {
        recyclerView.setVisibility(GONE);
        progressBar.setVisibility(VISIBLE);
        textView.setVisibility(GONE);
        swipeRefresh.setRefreshing(false);
    }


    public void showList() {
        recyclerView.setVisibility(VISIBLE);
        progressBar.setVisibility(GONE);
        textView.setVisibility(GONE);
    }

    public void showText(String text) {
        recyclerView.setVisibility(GONE);
        progressBar.setVisibility(GONE);
        textView.setVisibility(VISIBLE);
        textView.setText(text);
        swipeRefresh.setRefreshing(false);
    }

    public void setAdapter(RecyclerView.Adapter adapter) {
        this.adapter = adapter;
        recyclerView.setAdapter(this.adapter);
        showList();
        swipeRefresh.setRefreshing(false);
    }

    public void enableSwipeToRefresh(boolean enabled) {
        swipeRefresh.setEnabled(enabled);
        isSwipeEnabled = enabled;
    }

    public void setListener(ListLoadingViewListener listener) {
        this.listener = listener;
    }

    @Override
    public void onRefresh() {
        if (null != listener) {
            listener.onRefresh();
        }
    }

    public void setLayoutManager(LinearLayoutManager layoutManager) {
        this.layoutManager = layoutManager;
        recyclerView.setLayoutManager(layoutManager);
    }

    public RecyclerView.Adapter getAdapter() {
        return adapter;
    }
}

view_list_loading.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/swipe"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/list_loading_recyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:visibility="gone"/>

        <ProgressBar
            android:id="@+id/list_loading_progress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"/>

        <TextView
            android:id="@+id/list_loading_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="@string/warn_no_adapter"
            android:visibility="gone"/>
    </FrameLayout>
</android.support.v4.widget.SwipeRefreshLayout>