Android studio用真机进行调试时报错The application could not be installed: INSTALL_FAIL

当Android studio用真机进行调试时，安装app失败，而且还报以下错误：

Session 'app': Installation did not succeed.
      The application could not be installed: INSTALL_FAILED_TEST_ONLY
      Retry

如图：

解决方法：

只需要在gradle.properties

文件增加​​android.injected.testOnly=false​​