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    //call in onCreate()
    private void moveDrawerToTop() {
        DrawerLayout drawer = (DrawerLayout) layoutInflater.inflate(R.layout.left_drawer, null); // "null" is important.

        // HACK: "steal" the first child of left_drawer view
        ViewGroup decor = (ViewGroup) getWindow().getDecorView();
        View child = decor.getChildAt(0);
        decor.removeView(child);
        LinearLayout container = (LinearLayout) drawer.findViewById(R.id.drawer_content); // This is the container we defined just now.
        container.addView(child, 0);

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AndroidManifest.xml:
android:theme="@style/MyAppTheme"

Styles.xml:
    <style name="MyAppTheme" parent="@style/Theme.AppCompat.Light">
        <item name="actionDropDownStyle">@style/DropDownNav.Example</item>
    </style>

    <style name="DropDownNav.Example" parent="@style/Widget.AppCompat.Light.Spinner.DropDown.ActionBar">
        <item name="android:background">@android:color/transparent</item>

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<item
        android:id="@+id/menu_overflow"
        android:title="Overflow"
        android:icon="@android:drawable/ic_menu_more"
        android:orderInCategory="1"
        app:showAsAction="always">
        <menu>
            <item android:id="@+id/item1"
                android:icon="@drawable/icon1"
                android:title="title1"

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        try {
            ViewConfiguration config = ViewConfiguration.get(this);
            Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
            if(menuKeyField != null) {
                menuKeyField.setAccessible(true);
                menuKeyField.setBoolean(config, false);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }