android顶部(toolbar)搜索框实现代码

<?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);
  }
}