將APK發布到應用商店或接入第三方的SDK時,有時需要提供APK的簽名摘要信息,可以通過摘要算法MD5或SHA-1來獲取簽名的摘要,除了獲取自己的APK簽名,也可以獲取手機上其他已安裝的APK簽名,只需要傳入其他APK的包名即可。
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private static final char[] HEX_CHAR = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; /** 獲取簽名的MD5摘要 */ public String[] signatureDigest() { pkgInfo = mContext.getPackageManager().getPackageInfo( mContext.getPackageName(), PackageManager.GET_SIGNATURES); int length = pkgInfo.signatures.length; String[] digests = new String[length]; for (int i = 0; i < length; ++i) { Signature sign = mPkgInfo.signatures[i]; try { MessageDigest md5 = MessageDigest.getInstance("MD5"); byte[] digest = md5.digest(sign.toByteArray()); // get digest with md5 algorithm digests[i] = toHexString(digest); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); digests[i] = null; } } return digests; } /** 將字節數組轉化為對應的十六進制字符串 */ private String toHexString(byte[] rawByteArray) { char[] chars = new char[rawByteArray.length * 2]; for (int i = 0; i < rawByteArray.length; ++i) { byte b = rawByteArray[i]; chars[i*2] = HEX_CHAR[(b >>> 4 & 0x0F)]; chars[i*2+1] = HEX_CHAR[(b & 0x0F)]; } return new String(chars); } |
以上就是本文的全部內容，希望對大家的學習有所幫助。
