adb connect后adb install报错

adb connect 192.168.2.116命令执行成功后执行安装命令
adb -s 192.168.2.116 install -r D:\xxx.apk
出现如下错误

Error: java.lang.SecurityException: Neither user 2000 nor current process has android.permission.INSTALL_PACKAGES.

解决办法
先执行adb root命令，再执行adb -s 192.168.2.116 install -r D:\xxx.apk