java:3: error: package android.support.annotation

[kumudamulgund]

I have setup my Firebase project, included firebase_mlkit_language dependency in my pubspec.yaml file

dependencies:
flutter:
sdk: flutter
firebase_mlkit_language: ^1.1.2 //Firebase ML kit
firebase_core: ^0.4.0+9
firebase_auth: ^0.14.0+5

When, I run my app, I get the following error:
Running Gradle task 'assembleDebug'...
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageTranslator.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/DownloadModel.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageIdentifier.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/DeleteModel.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/ViewModels.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageTranslator.java:70: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageTranslator.java:61: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageTranslator.java:54: error: cannot find symbol
public void onSuccess(@nonnull String translatedText) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/DownloadModel.java:36: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/LanguageIdentifier.java:62: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/DeleteModel.java:32: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
/opt/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_mlkit_language-1.1.2/android/src/main/java/io/flutter/plugins/firebase_mlkit_language/ViewModels.java:42: error: cannot find symbol
public void onFailure(@nonnull Exception e) {
^
symbol: class NonNull
12 errors

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':firebase_mlkit_language:compileDebugJavaWithJavac'.

Compilation failed; see the compiler error output for details.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

[VibhutiBansal-11]

Did you find solution for this?

[VibhutiBansal-11]

I was facing the same issue!
dependencies:
flutter:
sdk: flutter
cloud_firestore: ^0.14.0+2
firebase_core: ^0.5.0
firebase_mlkit_language:
git: https://github.com/rishabnayak/firebase_mlkit_language

Using the dependency directly from git url made it work.