Do not know why, but Google is not paying enough attention at their latest SDKs. They changed file and folder structure without spending any notice. So if you are running into Error messages that contain keywords like "zipaling" you need to move the "zipalign" binary, or any other binaries to their origin folder. 1. Maybe the "zipalign" file is now located at ../sdk/build-tools/android-4.x.x/ If this is the case please move it to ../sdk/tools/ 2. If "zipalign" is not located at ../sdk/build-tools/android-4.x.x/ use this one HERE-zipaling.zip and extract and save it at the ../sdk/tools/ folder