android获取apk签名信息

因为工作需要，需要获取应用的apk传递给新浪微博或者微信去申请授权 所以需要程序内获取签名上传服务器

做法如下：

 

public static String getAPPSecretString(Activity activity){

String backString="";

try {

PackageInfo mPackageInfo=activity.getPackageManager().getPackageInfo(GlobalConfig.APP_PACKAGE_NAME, 64);

Signature xx[]=mPackageInfo.signatures;

byte[] arrayOfByte= mPackageInfo.signatures[0].toByteArray();

backString= digest(arrayOfByte);

} catch (NameNotFoundException e1) {

e1.printStackTrace();

}

return backString;

}

 

 

private static final char hexDigits[] = { '0', '1', '2', '3', '4', '5',

'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };

 

public static final String digest(String message) {

try {

byte[] strTemp = message.getBytes();

MessageDigest mdTemp = MessageDigest.getInstance("MD5");

mdTemp.update(strTemp);

byte[] md = mdTemp.digest();

int j = md.length;

char str[] = new char[j * 2];

int k = 0;

for (int i = 0; i < j; i++) {

byte byte0 = md[i];

str[k++] = hexDigits[byte0 >>> 4 & 0xf];

str[k++] = hexDigits[byte0 & 0xf];

}

return new String(str);

} catch (Exception e) {

return null;

}

}

public static final String digest(byte[] strTemp) {

try {

// byte[] strTemp = message.getBytes();

MessageDigest mdTemp = MessageDigest.getInstance("MD5");

mdTemp.update(strTemp);

byte[] md = mdTemp.digest();

int j = md.length;

char str[] = new char[j * 2];

int k = 0;

for (int i = 0; i < j; i++) {

byte byte0 = md[i];

str[k++] = hexDigits[byte0 >>> 4 & 0xf];

str[k++] = hexDigits[byte0 & 0xf];

}

return new String(str);

} catch (Exception e) {

return null;

}

}