Gradle task to execute android zipalign

Question

I would like to build a gradle Exec task that would run android's zipalign on my signed apk file, and then validates the the alignment.

Answer 1

Variables:

• ANDROID_HOME - path to android SDK
• ZIPALIGN_PATH - path to zipalign executable, relative to the
• ANDROID_HOME buildDir - gradle's build directory
• OUTPUT_APK_PATH - the directory of created apk files
• APK_FILE_TO_ALIGN - the apk that you want to perform the zipalign on (should be signed)
• APK_FILE_NAME - the name of the file after zipalign

zipalign task:

task zipAlign(type: Exec) {

        executable "${ANDROID_HOME}${ZIPALIGN_PATH}"
        args "-f",  "-v", "4", "${buildDir}${OUTPUT_APK_PATH}${APK_FILE_TO_ALIGN}", "${buildDir}${OUTPUT_APK_PATH}${APK_FILE_NAME}"

}

zipalign verification task (note that this task depends on the zipalign task):

task verifyZipAlign(type: Exec, dependsOn: 'zipAlign') {

        executable "${ANDROID_HOME}${ZIPALIGN_PATH}"
        args "-c",  "-v", "4", "${buildDir}${OUTPUT_APK_PATH}${APK_FILE_NAME}"

}