Getting RuntimeException for kotlin code - kotlin

Question

I am using Bluetooth LE for fetching surrounding devices but I am not getting a list and also I am getting Runtime Exception here is stack-trace
06-18 13:59:33.188 10189-10189/com.labs.aress.bleomronkotlin E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.labs.aress.bleomronkotlin, PID: 10189
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=0, data=null} to activity {com.labs.aress.bleomronkotlin/com.labs.aress.bleomronkotlin.MainActivity}: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter data
at android.app.ActivityThread.deliverResults(ActivityThread.java:4094)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4137)
at android.app.ActivityThread.-wrap20(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1529)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
Caused by: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter data
at com.labs.aress.bleomronkotlin.BaseMainActivity.onActivityResult(BaseMainActivity.kt)
at android.app.Activity.dispatchActivityResult(Activity.java:6931)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4090)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4137) 
at android.app.ActivityThread.-wrap20(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1529) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6123) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757) 
code is here
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
AppLog.dMethodIn()
super.onActivityResult(requestCode, resultCode, data)
if (REQUEST_CODE_SCAN != requestCode) {
AppLog.w("Unknown request code : $requestCode")
return
}
if (BleScanActivity.RESPONSE_CODE_CONNECT != resultCode) {
return
}
val discoverPeripheral = data.getParcelableExtra<DiscoverPeripheral?>(BleScanActivity.EXTRA_CONNECT_REQUEST_PERIPHERAL)
if (null == discoverPeripheral) {
AppLog.e("null == discoverPeripheral")
return
}
initDeviceInfoView()
initConnectionView()
onConnect(discoverPeripheral)
}
I dont understand why data is throwing null

Answer 1

The problem with your code is that the data parameter is not nullable, but Android calls it with a null value.
If you override the onActivityResult function in Android Studio the function signature you get is actually
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
as opposed to what you have
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent)
The difference is the ? after the "data: Intent"
Add the ? and make the appropriate changes to your code (to account for the nullable value) and it should work.