Crashes with java.lang.NullPointerException

[filiphosko]

This is the stack trace:

org.capslock.RNDeviceBrightness.RNDeviceBrightnessModule.getBrightnessLevel RNDeviceBrightnessModule.java:47
java.lang.reflect.Method.invokeNative Method.java
java.lang.reflect.Method.invoke Method.java:515
com.facebook.react.bridge.BaseJavaModule$JavaMethod.invoke BaseJavaModule.java:368
com.facebook.react.cxxbridge.JavaModuleWrapper.invoke JavaModuleWrapper.java:138
com.facebook.react.bridge.queue.NativeRunnable.run NativeRunnable.java
android.os.Handler.handleCallback Handler.java:808
android.os.Handler.dispatchMessage Handler.java:103
com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage MessageQueueThreadHandler.java:31
android.os.Looper.loop Looper.java:193
com.facebook.react.bridge.queue.MessageQueueThreadImpl$3.run MessageQueueThreadImpl.java:208
java.lang.Thread.run Thread.java:848

It looks like it's crashing here https://github.com/Calvin-Huang/react-native-device-brightness/blob/master/android/src/main/java/org/capslock/RNDeviceBrightness/RNDeviceBrightnessModule.java#L47