Base layout to use material button in middle two views

activity_my.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MyActivity"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="140dp"
        android:background="#ff6362ff" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="#ff6362ff">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="45dp"
            android:background="#FFFFFF" />

        <Button
            android:layout_width="56dp"
            android:layout_height="56dp"
            android:background="@drawable/fab"
            android:layout_gravity="top|right"
            android:layout_margin="16dp" />

    </FrameLayout>

</LinearLayout>

fab.xml

<?xml version="1.0" encoding="utf-8"?>

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">

    <solid android:color="#FF0000" />

</shape>

MyActivity.java

package com.example.a557114.materialbutton;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


public class MyActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        if (getActionBar() !=  null) {
            ColorDrawable cd = new ColorDrawable(Color.parseColor("#ff6362ff"));
            getActionBar().setBackgroundDrawable(cd);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
        <item name="android:windowContentOverlay">@null</item>
    </style>

</resources>