Implement floating action icon/button which allows to go (or focus or scroll up) to the top of the page

Question

Can anyone suggest me how to implement floating action icon/button which allows to go (or focus or scroll up) to the top of the page when clicked?

Thanks in advance for any help.

Answer 1

Add this code to your layout file:

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="end|bottom"
    android:src="@drawable/ic_my_icon"
    android:layout_margin="16dp" />

You can then apply an View.OnClickListener to handle FAB taps.

FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
    public void onClick(View view) 
    {
        scrollView.fullScroll(ScrollView.FOCUS_UP); //code to scroll to the top of scrollview
    } 
});