Tidying up Authenticate activity

app/src/main/java/uk/org/openseizuredetector/AuthenticateActivity.java

@@ -85,19 +85,6 @@ public class AuthenticateActivity extends AppCompatActivity {
         mWac = mConnection.mSdServer.mLm.mWac;
     }
 
-    //public void authCallback(boolean authSuccess, String tokenStr) {
-    //Log.v(TAG,"authCallback");
-    //    updateUi();
-    //}
-
-    public void eventCallback(boolean success, String eventStr) {
-        Log.v(TAG,"eventCallback");
-    }
-
-    public void datapointCallback(boolean success, String datapointStr) {
-        Log.v(TAG,"datapointCallback");
-    }
-
     private void updateUi() {
         SharedPreferences prefs;
         String storedAuthToken;
@@ -146,8 +133,13 @@ public class AuthenticateActivity extends AppCompatActivity {
                     mWac.authenticate(uname,passwd, (String retVal) -> {
                         if (retVal != null) {
                             Log.d(TAG,"Authentication Success - token is "+retVal);
+                            mUtil.showToast("Login Successful");
                             saveAuthToken(retVal);
                             updateUi();
+                        } else {
+                            Log.e(TAG,"onOk: Authentication failure for "+uname+", "+passwd);
+                            mUtil.showToast("ERROR: Authentication Failed - Please Try Again");
+                            mUtil.writeToSysLogFile("AuthActivity - Authorisation failed for "+uname+", "+passwd);
                         }
                     });
                     //finish();

app/src/main/res/layout/activity_authenticate.xml

@@ -50,7 +50,7 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
-                android:text="@string/cancel" />
+                android:text="@string/back" />
 
             <Button
                 android:id="@+id/OKBtn"

app/src/main/res/values/strings.xml

@@ -325,4 +325,5 @@
     <string name="selectFromOptionselow">"-- select option --"</string>
     <string name="waitingForData">...waiting for data...</string>
     <string name="refreshBtn">Refresh</string>
+    <string name="back">Back</string>
 </resources>