Run this to get the SHA1 for your particular signature. I use for google maps, google plus and facebook and others to ensure that i have the right key

SHA1.java

try {
            PackageInfo info = getPackageManager().getPackageInfo(
                    "com.testing.yourPackageName",
                    PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
                textView.setText(Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
        } catch (PackageManager.NameNotFoundException e) {
 
        } catch (NoSuchAlgorithmException e) {
 
        }