public static String getSignature(Context context){
PackageManager pm = context.getPackageManager();
String pkgName = context.getPackageName();
try {
PackageInfo pi = pm.getPackageInfo(pkgName, PackageManager.GET_SIGNATURES);
Signature[] signatures = pi.signatures;
if(signatures != null && signatures.length > 0){
String signature =signatures[0].toCharsString();
Log.i(TAG, "Signature of current package is : " + signature);
returnsignature;
}
} catch (PackageManager.NameNotFoundException e1) {
e1.printStackTrace();
}
return null;
}