出现这个问题可以尝试在AndroidManifest.xml文件中进行一下修改
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.duxiaoye.project649_9005"
xmlns:tools="http://schemas.android.com/tools"> //****修改****
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"