Android Swipe Down to Refresh a ListView

Finally, Google released an official version of pull-to-refresh library!

It is called SwipeRefreshLayout, inside the support library, and the documentation is here:

1) Add SwipeRefreshLayout as a parent of view which will be treated as pull to refresh layout. (I took ListView as an example, it can be any View like LinearLayout, ScrollView etc.)

<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/pullToRefresh"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>

2) Add a listener to your class

protected void onCreate(Bundle savedInstanceState) {
    SwipeRefreshLayout pullToRefresh = findViewById(R.id.pullToRefresh);
    pullToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {
            refreshData(); // your code
            pullToRefresh.setRefreshing(false);
        }
    });
}

You can also call pullToRefresh.setRefreshing(true/false); as per your requirement.