kotlin coroutine抛出java.lang.IllegalStateException:已经恢复,但得到了值的位置

一般来说,我对Kotlin协同程序和Android开发很陌生。 在玩弄了解它是如何工作的时候,我遇到了一个我似乎无法解决的错误。

从基本的活动,我尝试连接到googleApiClient。 权限是可以的。 我希望使用kotlin协同程序以直接方式从LocationManager获取位置更新,以便稍后使用此位置对象。 我第一次在模拟器中改变自己的位置时,它工作的很好,第二次改变我的位置,它崩溃,像这样的exception:

FATAL EXCEPTION: main Process: com.link_value.eventlv, PID: 32404 java.lang.IllegalStateException: Already resumed, but got value Location[gps 48.783000,2.516180 acc=20 et=+59m16s372ms alt=0.0 {Bundle[mParcelledData.dataSize=40]}] at kotlinx.coroutines.experimental.AbstractContinuation.resumeImpl(AbstractContinuation.kt:79) at kotlinx.coroutines.experimental.AbstractContinuation.resume(AbstractContinuation.kt:72) at com.link_value.eventlv.View.Create.NewEventLvActivity$await$2$1.onLocationChanged(NewEventLvActivity.kt:100) at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:297) at android.location.LocationManager$ListenerTransport.-wrap0(LocationManager.java) at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:242) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6077) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_new_event_lv) askForUserLocation() val locationManager = this.getSystemService(Context.LOCATION_SERVICE) as LocationManager val presenter = CreateEventPresenterImpl(this@NewEventLvActivity) googleApiClient = GoogleApiClient.Builder(this@NewEventLvActivity) .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */) .addApi(Places.GEO_DATA_API) .addConnectionCallbacks(this) .build() } override fun onConnected(p0: Bundle?) { val locationManager = this.getSystemService(Context.LOCATION_SERVICE) as LocationManager input_address.addTextChangedListener(object: TextWatcher{ override fun afterTextChanged(p0: Editable?) { } override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) { } override fun onTextChanged(query: CharSequence?, p1: Int, p2: Int, p3: Int) { if (query.toString().length >= 4) { launch(UI) { val locationUpdated = locationManager.await(LocationManager.GPS_PROVIDER) input_name.text = Editable.Factory.getInstance().newEditable(locationUpdated.toString()) } } } }) } private suspend fun LocationManager.await(locationProvider: String): Location? = suspendCoroutine { cont -> try { requestLocationUpdates(locationProvider, 0, 0.toFloat(), object : LocationListener { override fun onStatusChanged(p0: String?, p1: Int, p2: Bundle?) { } override fun onProviderEnabled(p0: String?) { } override fun onProviderDisabled(p0: String?) { cont.resumeWithException(UnknownLocationException()) } override fun onLocationChanged(location: Location?) { cont.resume(location) } }) } catch (ex: SecurityException) { cont.resumeWithException(ex) } } 

就好像Kotlin使用相同的Continuation。 我不知道我在做什么错,为什么它第二次崩溃。 有人能教导我吗? 提前。

Kotlin language will be the best programming language for Android.