1、打完包后签名
jarsigner -verbose -keystore ChangeBackgroundWidget.keystore -signedjar ChangeBackgroundWidget_signed.apk ChangeBackgroundWidget.apk {alias}
{alias}为keystore的别名
2、签名后字节对齐
zipalign -v 4 ChangeBackgroundWidget_signed.apk ChangeBackgroundWidget_signed_aligned.apk