Android swipe/pull to refresh

In this post I will describe how to use SwipeRefreshLayout which is part from support library too.
Using this new layout is pretty easy and this is a standard way to implement common Pull to refresh pattern.
We must know: SwipeRefreshLayout is a ViewGroup layout which can hold only one scrollable view as children.
Example layout file with Swipe Refresh

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipe"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            ..............................................
        </ScrollView>
    </android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>

We can set OnRefreshListener to listen when user wants to refresh content

mSwipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe);
mSwipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        System.out.println("Updated");
        mSwipeLayout.setRefreshing(false);
    }
});

If we want we can use it to display refreshing content before user iteract. For this we can use setRefreshing method

mSwipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe);
mSwipeLayout.post(new Runnable() {
    @Override
    public void run() {
        mSwipeLayout.setRefreshing(true);
    }
});