pda/zhuike/src/main/res/layout/app_bar_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Main2Activity">


    <LinearLayout

        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"

        >
    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ToolBarTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/ToolBarTheme.PopupOverlay"  >

            <android.support.v7.widget.AppCompatSpinner
                android:id="@+id/sexSelect"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:minWidth="50dp"
                style="@style/common_spinner"
                app:theme="@style/common_spinner"
                android:popupTheme="@style/common_spinner"
                android:entries="@array/sex"
                android:layout_gravity="left|center_vertical"
                android:layout_weight="0"
                android:visibility="gone"
                />
            <TextView
                android:id="@+id/toolbarTitle"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:gravity="center"
                android:text="我是标题"
                android:textSize="20sp"
                android:layout_weight="1"
                android:visibility="gone"
                />



        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>

        <include layout="@layout/realcontent" />



    </LinearLayout>
    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|start"
        android:layout_margin="@dimen/fab_margin"
        android:visibility="gone"
        app:srcCompat="@android:drawable/ic_dialog_email" />


</android.support.design.widget.CoordinatorLayout>