1.修改Android Apex Mobile Detail Communication按钮背景。

Apex Mobile/app/src/main/res/layout/commu_item_footer.xml

@@ -24,11 +24,12 @@
     <Button
         android:id="@+id/comm_send_email_btn"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:layout_height="40dp"
         android:layout_marginEnd="8dp"
         android:layout_marginRight="8dp"
+        android:background="@drawable/btn_bg"
         android:text="Send"
         android:textAllCaps="false"
         app:layout_constraintBottom_toBottomOf="@+id/comm_edit_tv"
-        app:layout_constraintEnd_toEndOf="parent" />
+        app:layout_constraintEnd_toEndOf="parent"/>
 </android.support.constraint.ConstraintLayout>

Apex Mobile/app/src/main/res/layout/commu_item_header.xml

@@ -61,9 +61,10 @@
         android:layout_width="30dp"
         android:layout_height="30dp"
         android:layout_marginTop="8dp"
+        android:background="@drawable/bg_button"
+        android:src="@drawable/ic_contact"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/comm_to_tv"
-        android:src="@drawable/ic_contact"
         app:srcCompat="@drawable/ic_contact"/>
 
 </android.support.constraint.ConstraintLayout>