界面调整取消预览按钮

app/src/main/res/layout/activity_camera_channel.xml

@@ -23,16 +23,6 @@
         app:layout_constraintEnd_toStartOf="@id/vertical_centerline"
         app:layout_constraintLeft_toLeftOf="parent" />
 
-    <Button
-        android:id="@+id/video_capture_button"
-        android:layout_width="110dp"
-        android:layout_height="110dp"
-        android:layout_marginStart="50dp"
-        android:layout_marginBottom="50dp"
-        android:elevation="2dp"
-        android:text="预览"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintStart_toEndOf="@id/vertical_centerline" />
 
     <androidx.constraintlayout.widget.Guideline
         android:id="@+id/vertical_centerline"