将APK发布到应用商店或接入第三方的SDK时,有时需要提供APK的签名摘要信息,可以通过摘要算法MD5或SHA-1来获取签名的摘要,除了获取自己的APK签名,也可以获取手机上其他已安装的APK签名,只需要传入其他APK的包名即可。
- private static final char[] HEX_CHAR = {
-
- '0', '1', '2', '3', '4', '5', '6', '7',
-
- '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
-
- };
-
- /** 获取签名的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;
-
- }
-
- /** 将字节数组转化为对应的十六进制字符串 */
-
- 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内容，希望对大家的学习有所帮助。 | 
