navigation_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="@dimen/action_bar_height"
    android:background="@drawable/actionbar_bg"
    android:gravity="center_horizontal|center_vertical"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/go_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingRight ="@dimen/image_padding"
        android:src="@drawable/btn_back"
        android:clickable="true" />

    <TextView
        android:id="@+id/nb_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:singleLine="true"
        android:text="@string/setting"
        android:textColor="@color/white"
        android:textSize="@dimen/text_size_big" />

    <ImageView
        android:id="@+id/btn_set"
        android:layout_width="wrap_content"
        android:padding="@dimen/image_padding"
        android:src="@drawable/btn_save"
        android:layout_height="wrap_content"
        android:clickable="true" />

</LinearLayout>