Generate key command:
keytool -genkey -v -keystore i2host_com.keystore -alias i2host -keyalg RSA -keysize 2048 -validity 10000
Sign Jar command:
jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore i2host_com.keystore <APK_NAME>.apk i2host
Align APK command:
./zipalign 8 <input_APK> <output_apk>