获取手机已安装APK的签名摘要

2016/01/28 56175

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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. 源码和APK下载地址：https://github.com/whinc/apk-signature-digest

 

[Java]代码     

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);

}

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