获取APK打包时间和签名

private String getAppBuildTime() {
String result = "";
try {
ApplicationInfo ai = getPackageManager().getApplicationInfo(getPackageName(),0);
ZipFile zf = new ZipFile(ai.sourceDir);
ZipEntry ze = zf.getEntry("META-INF/MANIFEST.MF");
long time = ze.getTime();
SimpleDateFormat formatter = (SimpleDateFormat) SimpleDateFormat.getInstance();
formatter.applyPattern("yyyy/MM/dd HH:mm:ss");
result = formatter.format(new java.util.Date(time));
zf.close();
} catch (Exception e) {
}

return result;
}



public void getSingInfo() {
try {
PackageInfo packageInfo = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
Signature[] signs = packageInfo.signatures;
Signature sign = signs[0];
parseSignature(sign.toByteArray());
} catch (Exception e) {
e.printStackTrace();
}
}
public void parseSignature(byte[] signature) {
try {
CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(signature));
String pubKey = cert.getPublicKey().toString();
String signNumber = cert.getSerialNumber().toString();

Log.i("UNITY","signName:" + cert.getSigAlgName());
Log.i("UNITY","pubKey:" + pubKey);
Log.i("UNITY","signNumber:" + signNumber);
Log.i("UNITY","subjectDN:"+cert.getSubjectDN().toString());


} catch (CertificateException e) {
e.printStackTrace();
}
}