URL : //mypi.ruliweb.com/m/mypi.htm?ncate=7&nid=101876&num=9133
1.Find your copy of the Android SDK in explorer
2.Go to build-tools and choose a version (e.g.build-tools\19.1.0)
3.Copy zipalign.exe
4.Come back out of build-tools
5.Go into tools
6.Paste zipalign.exe