Run AndroidSDKtoolsandroid.bat to load the higher corresponding version
Then you can view it under the directory AndroidSDKbuild-tools
It should be that the corresponding version of the build tool is missing
Install using Android SDK Manage
As mentioned above, update the Android build tools to a version greater than 19.1. Please check it yourself for details on how to update.
Run AndroidSDKtoolsandroid.bat to load the higher corresponding version
Then you can view it under the directory AndroidSDKbuild-tools
It should be that the corresponding version of the build tool is missing
Install using Android SDK Manage
As mentioned above, update the Android build tools to a version greater than 19.1. Please check it yourself for details on how to update.