Android include 使用注意事项E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example_fatal exception: main process: com.example.address

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.administrator.medx_media, PID: 4283
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.administrator.medx_media/com.example.administrator.medx_media.MainActivity}: android.view.InflateException: Binary XML file line #16: You must specify a layout in the include tag: <include layout="@layout/layoutID" />
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2793)

这是一个不熟悉include空间的翻车现场。

    <include
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout="@layout/layout_head"
        android:layout_weight="11"/>

每次编译时都会报错，看了很多文章，才找到正确的答案，那就是

一个控件的基础属性的问题。长记性了。

正确的格式演示是：

  <include
            android:id="@+id/title"
            layout="@layout/include_title"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"></include>

把android：去掉即可  (   layout="@layout/include_title")