Toolbar悬停搜索框

<?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"
                                                 android:id="@+id/main_content"
                                                 android:layout_width="match_parent"
                                                 android:layout_height="match_parent"
                                                 android:focusableInTouchMode="true"
                                                 android:fitsSystemWindows="true">

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:text="@string/large_text" />
    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways"
            app:title="标题栏"
            app:navigationIcon="@mipmap/navigation_back_white"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

        <RelativeLayout
            android:id="@+id/search_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/toolbar"
            android:background="@color/colorPrimary"
            android:padding="16dp">

            <EditText
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:drawableLeft="@android:drawable/ic_menu_camera"
                android:drawablePadding="22dp"
                android:drawableRight="@android:drawable/ic_menu_search"
                android:gravity="left|center"
                android:hint="请输入搜索内容"
                android:padding="10dp"
                android:textColorHint="@android:color/darker_gray" />
        </RelativeLayout>

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

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

public class StopSearchViewBelowToolbarActivity extends AppCompatActivity {

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