To suppress this warning, remove "buildToolsVersion '28.0.3'" from your build.gradle file

[anta40]

I'm working on a project which uses RN 0.71.0. After installing the lib: $ yarn add react-native-ble-manager

Let's try to run the project: $ yarn android:dev

android:dev on my package.json is defined this way: "android:dev-release": "cd android && ./gradlew clean && ENVFILE=.env.development ./gradlew assembleRelease && cd ..",

There are some errors:

> Task :react-native-ble-manager:compileDebugJavaWithJavac FAILED

Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

See https://docs.gradle.org/7.5.1/userguide/command_line_interface.html#sec:command_line_warnings
349 actionable tasks: 333 executed, 16 up-to-date
Warning: This version only understands SDK XML versions up to 3 but an SDK XML file of version 4 was encountered. This can happen if you use versions of Android Studio and the command-line tools that were released at different times.
Note: /Users/anta40/Codes/Work/oa-mobile/node_modules/lottie-react-native/src/android/src/main/java/com/airbnb/android/react/lottie/LottieAnimationViewManager.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/anta40/Codes/Work/oa-mobile/node_modules/lottie-react-native/src/android/src/main/java/com/airbnb/android/react/lottie/LottieAnimationViewManager.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/anta40/Codes/Work/oa-mobile/node_modules/@react-native-async-storage/async-storage/android/src/main/java/com/reactnativecommunity/asyncstorage/AsyncStorageModule.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/anta40/Codes/Work/oa-mobile/node_modules/@react-native-async-storage/async-storage/android/src/javaPackage/java/com/reactnativecommunity/asyncstorage/AsyncStoragePackage.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:43: error: cannot find symbol
class BleManager extends NativeBleManagerSpec {
                         ^
  symbol: class NativeBleManagerSpec
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:142: error: cannot find symbol
                emitOnDidUpdateState(map);
                
                 symbol:   method emitOnDidUpdateState(WritableMap)
  location: class BleManager.MyBroadcastReceiver
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:187: error: cannot find symbol
                    emitOnPeripheralDidBond(map);
                    ^
  symbol:   method emitOnPeripheralDidBond(WritableMap)
  location: class BleManager.MyBroadcastReceiver
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:231: error: method does not override or implement a method from a supertype
    @Override
    ^
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:295: error: cannot find symbol
            if (getCurrentActivity() == null)
                ^
  symbol:   method getCurrentActivity()
  location: class BleManager
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManager.java:300: error: cannot find symbol
                    getCurrentActivity().startActivityForResult(intentEnable, ENABLE_REQUEST);
                    ^
                    
...
...
  symbol:   method emitOnStopScan(WritableMap)
  location: variable bleManager of type BleManager
/Users/anta40/Codes/Work/oa-mobile/node_modules/react-native-ble-manager/android/src/main/java/it/innove/BleManagerPackage.java:23: error: incompatible types: BleManager cannot be converted to NativeModule
        modules.add(new BleManager(reactApplicationContext));
                    ^
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
25 errors

FAILURE: Build completed with 2 failures.

Let me know if you need the content of build.gradle or whatever