9. Trouble Shooting

Add GoogleService-Info.plist

Proceed the installation steps when you see error messages like below. It is complaining that you have not setup properly.

FirebaseException ([core/not-initialized] Firebase has not been correctly initialized. Have you added the "GoogleService-Info.plist" file to the project?

Stuck in registration

When ff.register is called, it sets data to Firestore and if Firestore is set created, then it would hang on Firestore...doc('docId').set(). To fix this, just enable Firestore with security rules and indexes as described in the setup section.

MissingPluginException(No implementation found for method ...

If you meet errors like below,

• MissingPluginException(No implementation found for method init on channel plugins.flutter.io/google_sign_in)
• MissingPluginException(No implementation found for method checkPermissionStatus on channel flutter.baseflow.com/permissions/methods)

Mostly you have

• Misconfigured your packages
• To stop running debugging session and restart
  • Or delete some caches by doing
    • $ flutter clean
    • $ flutter pub cache repair
• Set up packages properly.

This error may happen when you try to login with google_sign_in package but you didn't setup facebook sign in package. Or when you try to take photos(on Android) without setting facebook sign in package.

MissingPluginException often happens when developer didn't set up properly when they add a package that depends on(or related in) others.

Try to do By pass MissingPluginException error and see if the error goes away.

Facebook login package problem

It looks like some of flutter packages are conflicting with flutter_facebook_auth package.

We found that cached_network_image, like webview_flutter packages are not working properly on Android platform until we set the settings of flutter_facebook_auth package.

There might be more packages that conflict with flutter_facebook_auth, so we recommand to do the setup of Facebook. If your app does not need Facebook login, see Fake setup with flutter_facebook_auth to do simple fake setup instead of going full setup.

Fake setup with flutter_facebook_auth

If really don't want to implement Facebook sign in or you want to skip Facebook sign in for the mean time while you are implementing Gogole sign in, then you may add the following settings. You can just put fake data on strings.xml.

Open main/AndroidManifest.xml and update below.

<application ... android:label="@string/app_name" ...>

Open /android/app/src/main/res/values/strings.xml ( or create if it is not existing) And copy facebook_app_id and fb_login_protocol_scheme, past into the XML file like below.

<resources>
    <string name="app_name">Your app name</string>
    <string name="facebook_app_id">xxxxxxxxxxxxxxxxx</string>
    <string name="fb_login_protocol_scheme">xxxxxxxxxxxxxxxxx</string>
</resources>

Open android/app/src/main/AndroidManifest.xml Add the following uses-permission element after the application element (outside application tag)

  <uses-permission android:name="android.permission.INTERNET"/>

And add the following meta-data element, an activity for Facebook, and an activity and intent filter for Chrome Custom Tabs inside your application element:

<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
<activity android:name="com.facebook.FacebookActivity" android:configChanges=
            "keyboard|keyboardHidden|screenLayout|screenSize|orientation" android:label="@string/app_name" />
<activity android:name="com.facebook.CustomTabActivity" android:exported="true">
  <intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="@string/fb_login_protocol_scheme" />
  </intent-filter>
</activity>

cached_network_image package is not working

See Facebook login package problem

webview_flutter package is not working

See Facebook login package problem

com.apple.AuthenticationServices.AuthorizationError error 1001 or if the app hangs on Apple login

If you meet error message like this,

SignInWithAppleAuthorizationError(AuthorizationErrorCode.canceled, The operation couldn’t be completed. (com.apple.AuthenticationServices.AuthorizationError error 1001.))

Then, check if you have enabled Facebook login under Firebase => Sign-in method.

And then, try to login with real device.

sign_in_failed

PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null, null)

This error may happens when you didn't input SHA1 key on Android app in Firebase.

operation-not-allowed

PlatformException(operation-not-allowed, The identity provider configuration is not found., {code: operation-not-allowed, message: The identity provider configuration is not found., nativeErrorMessage: The identity provider configuration is not found., nativeErrorCode: 17006, additionalData: {}}, null)

This error may happens when you didn't enable the sign-in method on Firebase Authentication. For instance, you have set Facebook sign in settings but forgot to enable Facebook sign in on Firebase Authentication.

App crashes on second file upload

It's not a bug of Flutter and image_picker.

Firestore rules and indexes

If you see error like below, check if you have properly set Firestore rules and indexes.

[cloud_firestore/failed-precondition] Operation was rejected because the system is not in a state required for the operation's execution. If performing a query, ensure it has been indexed via the Firebase console.

After ff.editPost or ff.editComment, nothing happens?

Check Internet connectivity. And getxfire works in offline. So, even though there is no Internet, posting would works. If you want to continue without Internet, you shuold await.

SDK version not match

if you see error like sdk version not match, then, try to update flutter sdk 1.22.x

flutter_image_compress error

When you meet error like below,

Undefined symbols for architecture arm64:
  "_SDImageCoderEncodeCompressionQuality", referenced from:
      +[CompressHandler compressDataWithImage:quality:format:] in CompressHandler.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

open ~/bin/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_image_compress-0.7.0/ios/Classes/CompressHandler.m file and comment out some code as described in its Git issue.

Authentication setup error on iOS

If you didn't set the Authentication settings property, you may meed this error.

Please register custom URL scheme 'com.googleusercontent.apps.229679080903-i8mfbm7ojqq87c169cvurajffg3hau70' in the app's Info.plist file.

To solve this problem, please do the setup.

Dex problem on Android

If you meet this error, you need to set up properly on Android.

com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: The number of method references in a .dex file cannot exceed 64K.

To solve this problem, please refer Android Setup in this document.

App is not authorized

If you meet this error, you haven't set up properly on Adnroid.

This app is not authorized to use Firebase Authentication. Please verify that the correct package name and SHA-1 are configured in the Firebase Console. [ App validation failed ].

To solve this problem, please refer Create a keystore and Debug has key to setup SHA-1 hash key into Firebase.

If app exists when picking photo

To solve this problem, please refer Image Picker Setup for iOS.