[FIXED] My flutter app showing black screen on Android because it can't connect to internet

Issue

Been working on this flutter project and everything's been going well. Now I'm done and want to deploy it to android but the app is not working on real android devices, I noticed the apps data usage is 0.00 so I tried adding all the permissions on android.xml, even added more security rules but all to no avail. Please has anyone ever encountered this and what was the solution?

Solution

So what happened was this

1st I didn't initialize FlutterBinding in my main.dart so I had to add it like this before Initialising my firebase

void main() async {
///Flutter binding initialized
  WidgetsFlutterBinding.ensureInitialized();
///Firebase initialized
  await Firebase.initializeApp();
  runApp(MyApp());
}

2nd (just to make sure everything works well) I added Google Services dependencies in my project level build.gradle

dependencies {
    // ...

    // Add the following line:
    classpath 'com.google.gms:google-services:4.3.13'  // Google Services plugin
  }

And then firebase plugin in my app level build.gradle

apply plugin: 'com.android.application'
// Add the following line:
apply plugin: 'com.google.gms.google-services'  // Google Services plugin

android {
  // ...
}

and that's all... My app worked

Answered By - Cisco
Answer Checked By - Pedro (JavaFixing Volunteer)