android异常“Re-installation failed due to different ”
启动项目，控制台报如下异常
Re-installation failed due to different application signatures.
You must perform a full uninstall of the application. WARNING: This will remove the application data!
Please execute 'adb uninstall com.example" in a shell
查网上的解决方案，说是：在手机上以前装过该应用，删除之前的应用，再次装。
但问题是：查看手机上装的应用，没有装过。
查到解决方案二：
1. 找到 android sdk的安装目录下的platform-tools，例如：安装目录为 D:\android-sdk_r21.1-windows\android-sdk-windows\platform-tools.
2. 运行--cmd--找到 该目录，然后运行异常中Please execute 'adb uninstall com.example" in a shell的'adb uninstall com.example"
