RecycleView PullToRefresh SwipeRefreshLayout

activity_my.xml

<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/swipe_layout">

    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/recycler_view" />
</android.support.v4.widget.SwipeRefreshLayout>

MyActivity.java

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import com.togethernetworks.basesdk.BaseActivity;
import com.togethernetworks.gallery.samples.mortar.UiModule;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;


public class MyActivity extends BaseActivity {

    private RecyclerView recyclerView;
    private SwipeRefreshLayout refreshLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        refreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_layout);
        refreshLayout.setColorSchemeColors(Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW);
        refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
             
            }
        });

        recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        final LinearLayoutManager layoutParams = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutParams);
        SomeAdapter adapter = new SomeAdapter(this);
        recyclerView.setAdapter(adapter);
        recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(int newState) {
            }

            @Override
            public void onScrolled(int dx, int dy) {
                refreshLayout.setEnabled(layoutParams.findFirstCompletelyVisibleItemPosition() == 0);
            }
        });
    }
}

Thank you for example. But I have question. Why setOnScrollListener is used?

@gintsgints, one thing I noticed is that if you don't enable the refresh only when the first item of the recycler view is completely visible, then, as of version 21.0.3 of the appcompat library, in Android 2.3 (who still supports that, right?) the swipe refresh layout will actually react to the pull down gesture and try to refresh, instead of delegating the touch event to the recycler view.

Thank you very much for this gist @VladSumtsov, your gist was very useful.

Thank you so much @VladSumtsov , very helpful gist

the last 2 method that is overrided should add a parameter in SDK 21:

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState){ 
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {