Fix sample app and GSI error handling (#839)

Fixes #833

Change-Id: I6f22cf814625a1f4a1c14c3007cfd3491b8cd22a

Author: samtstern

app/src/main/java/com/firebase/uidemo/auth/SignedInActivity.java

@@ -54,6 +54,7 @@
 
 public class SignedInActivity extends AppCompatActivity {
 
+    private static final String EXTRA_IDP_RESPONSE = "extra_idp_response";
     private static final String EXTRA_SIGNED_IN_CONFIG = "extra_signed_in_config";
 
     @BindView(android.R.id.content)
@@ -83,7 +84,11 @@ public static Intent createIntent(
             Context context,
             IdpResponse idpResponse,
             SignedInConfig signedInConfig) {
-        Intent startIntent = idpResponse == null ? new Intent() : idpResponse.toIntent();
+
+        Intent startIntent = new Intent();
+        if (idpResponse != null) {
+            startIntent.putExtra(EXTRA_IDP_RESPONSE, idpResponse);
+        }
 
         return startIntent.setClass(context, SignedInActivity.class)
                 .putExtra(EXTRA_SIGNED_IN_CONFIG, signedInConfig);
@@ -100,7 +105,7 @@ public void onCreate(Bundle savedInstanceState) {
             return;
         }
 
-        mIdpResponse = IdpResponse.fromResultIntent(getIntent());
+        mIdpResponse = getIntent().getParcelableExtra(EXTRA_IDP_RESPONSE);
         mSignedInConfig = getIntent().getParcelableExtra(EXTRA_SIGNED_IN_CONFIG);
 
         setContentView(R.layout.signed_in_layout);

auth/src/main/java/com/firebase/ui/auth/provider/GoogleProvider.java

@@ -165,6 +165,11 @@ private void onError(GoogleSignInResult result) {
                     .build();
             startLogin(mActivity);
         } else {
+            if (status.getStatusCode() == CommonStatusCodes.DEVELOPER_ERROR) {
+                Log.w(TAG, "Developer error: this application is misconfigured. Check your SHA1 " +
+                        " and package name in the Firebase console.");
+                Toast.makeText(mActivity, "Developer error.", Toast.LENGTH_SHORT).show();
+            }
             onError(status.getStatusCode() + " " + status.getStatusMessage());
         }
     }