Q:

Floating Action Button does not raise OnClick event

I have the Following layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:id="@+id/rlMap">
    <org.mapsforge.map.android.view.MapView
        android:id="@+id/mapView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:clickable="true"/>
    <ImageView
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:id="@+id/windArrow"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_gravity="top|right|end"
        android:src="@drawable/arrow"
        android:layout_alignStart="@+id/fab" />
    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|right|end"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:src="@drawable/settings"
        android:clickable="true"/>
</RelativeLayout>

And the following code in the OnCreate method:
...
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Log.d(TAG,"FAB Setting Clicked");
            Intent i = new Intent(getApplicationContext(), AppPreferences.class);
            startActivity(i);
        }
    });
...

But when I press the button nothing happens, The intent does not run, and the log is not written. 
The button animation is working and every time I press the button the following log message appears :

D/ViewRootImpl: ViewPostImeInputStage ACTION_DOWN

So there seems to be some reaction.
What am I doing wrong?

A:

Try this:                
fab.bringToFront();

Should help.

A:

The solution suggested by @Tasos worked:
add a click event inside the xml e.g
android:onClick="runThis"

and then in the Activity add 
public void runThis(View v) { ..... }

