下载工具死锁修复

app/src/main/res/menu/menu_main.xml

@@ -1,10 +1,10 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
-      xmlns:app="http://schemas.android.com/apk/res-auto"
-      xmlns:tools="http://schemas.android.com/tools"
-      tools:context="com.example.arial.downloaddemo.com.arialyy.simple.MainActivity">
-    <item
-        android:id="@+id/action_settings"
-        android:title="@string/action_settings"
-        android:orderInCategory="100"
-        app:showAsAction="never"/>
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context="com.example.arial.downloaddemo.com.arialyy.simple.MainActivity">
+  <item
+      android:id="@+id/action_settings"
+      android:title="@string/action_settings"
+      android:orderInCategory="100"
+      app:showAsAction="never"/>
 </menu>