Execution failed for task ':react-native-background-job:compileDebugJavaWithJavac'.

[kishansbs]

Task :react-native-background-job:compileDebugJavaWithJavac FAILED
warning: [options] source value 7 is obsolete and will be removed in a future release
warning: [options] target value 7 is obsolete and will be removed in a future release
warning: [options] To suppress warnings about obsolete options, use -Xlint:-options.
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/ReactNativeEventStarter.java:7: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/Utils.java:3: error: package android.support.annotation does not exist
import android.support.annotation.NonNull;
^
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/BackgroundJobModule.java:7: error: package android.support.annotation does not exist
import android.support.annotation.Nullable;
^
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/ExactJob.java:6: error: package android.support.annotation does not exist
import android.support.annotation.Nullable;
^
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/ReactNativeEventStarter.java:29: error: cannot find symbol
public ReactNativeEventStarter(@nonnull Context context) {
^
symbol: class NonNull
location: class ReactNativeEventStarter
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/ReactNativeEventStarter.java:34: error: cannot find symbol
public void trigger(@nonnull Bundle jobBundle) {
^
symbol: class NonNull
location: class ReactNativeEventStarter
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/Utils.java:14: error: cannot find symbol
public static boolean isReactNativeAppInForeground(@nonnull ReactNativeHost reactNativeHost) {
^
symbol: class NonNull
location: class Utils
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/BackgroundJobModule.java:146: error: cannot find symbol
@nullable @OverRide public Map<String, Object> getConstants() {
^
symbol: class Nullable
location: class BackgroundJobModule
/Users/machd/Desktop/RN_Projects/projectname/node_modules/react-native-background-job/android/src/main/java/com/pilloxa/backgroundjob/ExactJob.java:14: error: cannot find symbol
@OverRide protected void onHandleIntent(@nullable Intent intent) {
^
symbol: class Nullable
location: class ExactJob
9 errors
3 warnings

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':react-native-background-job:compileDebugJavaWithJavac'.

Compilation failed; see the compiler error output for details.

[rasheedk]

Hi, @kishansbs
This issue is due to android x.

don't know how you use the library, but preventing Jetifier from migrating to AndroidX seems to solve this issue.

#Local module Gradle settings.
android.useAndroidX=false
#Jetifier will convert support libraries of all your dependencies to AndroidX automatically,
# if you don't set it true then your project will have both support
android.enableJetifier=false

Please let me know weather it solved your problem ?

[showtan001]

Change like this:
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

[snowfluke]

Change like this:
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

Thanks bro, this working for me. Changing the line where the error pointed out from 'android.support' to 'androidx'.