Flutter - Error after include cloud firestore dependency.[Resolved] - firebase

Question

I'd like a help to resolve this Issue. I cannot build my flutter application after insert the cloud firestore dependency at the pubspec.yaml
dependencies:
flutter:
sdk: flutter
firebase_core: ^0.4.3+2
cloud_firestore: ^0.13.0+1
Error description:
FAILURE: Build failed with an exception.
What went wrong:
Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.
Could not resolve all task dependencies for configuration ':app:debugCompileClasspath'.
Could not resolve io.grpc:grpc-core:[1.21.0].
Required by:
project :app > io.grpc:grpc-okhttp:1.21.0
Failed to list versions for io.grpc:grpc-core.
Unable to load Maven meta-data from https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml.
Could not HEAD 'https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml'.
Connection reset
Failed to list versions for io.grpc:grpc-core.
Unable to load Maven meta-data from https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml.
Could not HEAD 'https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml'.
Connection reset
Failed to list versions for io.grpc:grpc-core.
Unable to load Maven meta-data from https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml.
Could not HEAD 'https://jcenter.bintray.com/io/grpc/grpc-core/maven-metadata.xml'.
Connection reset

Answer 1

This seems to be an internet connection problem, so please check your network.

Answer 2

This is more looking as if some connection issues are present,but if not then
First of all checkout your .gradle version it should be greater than 5
If you have created your project recently or under one month then you may need to check this step.
Then go to android/build.gradle and check your dependencies It should look like
dependencies {
classpath 'com.android.tools.build:gradle:3.4.2'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath 'com.google.gms:google-services:4.2.0'
}
If you donot use kotlin support then no need to write that classpath.Its for those who has kotlin support enabled by default.
In android/gradle.properties
you should have
org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true
android.enableR8=true
in app level build.gradle
defaultConfig {
minSdkVersion 23
}
and most importantly you should have downloaded your google-services.json file in your android project folder. For Firebase you also require sha1 or sometimes sha256 keys.
Now it should run properly.
May it helped you :)
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