Android Kotlin中的类型与接口不匹配
我有一个接口的实现问题,我尝试了一些东西,但没有成功 我不知道还能尝试什么,所以我请求你的帮助,提前谢谢你 MyGPSUtils.ktAndroid Kotlin中的类型与接口不匹配,android,android-studio,kotlin,Android,Android Studio,Kotlin,我有一个接口的实现问题,我尝试了一些东西,但没有成功 我不知道还能尝试什么,所以我请求你的帮助,提前谢谢你 MyGPSUtils.kt class GPSUtils(context: Context) { private var context: Context private var mSettingsClient: SettingsClient private var mLocationSettingsRequest: LocationSettingsRequest
class GPSUtils(context: Context) {
private var context: Context
private var mSettingsClient: SettingsClient
private var mLocationSettingsRequest: LocationSettingsRequest
private var locationManager: LocationManager
private var locationRequest: LocationRequest
init {
this.context = context
locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
mSettingsClient = LocationServices.getSettingsClient(context)
locationRequest = LocationRequest.create()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
locationRequest.interval = (10 * 1000).toLong()
locationRequest.fastestInterval = (2 * 1000).toLong()
val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
mLocationSettingsRequest = builder.build()
builder.setAlwaysShow(true) //this is the key ingredient
}
fun turnGPSOn(onGpsListener: OnGpsListener) {
if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
if (onGpsListener != null) {
onGpsListener!!.gpsStatus(true)
}
} else {
mSettingsClient.checkLocationSettings(mLocationSettingsRequest)
.addOnSuccessListener(context as Activity) {
if (onGpsListener != null) {
onGpsListener!!.gpsStatus(true)
}
}.addOnFailureListener(context as Activity) { e ->
val statusCode = (e as ApiException).statusCode
when (statusCode) {
LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> try {
val rae = e as ResolvableApiException
rae.startResolutionForResult(context as Activity, 1001)
} catch (sie: IntentSender.SendIntentException) { Log.i(TAG, "PendingIntent unable to execute request.") }
LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
val errorMessage = "Location settings are inadequate, and cannot be " + "fixed here. Fix in Settings."
Log.e(TAG, errorMessage)
Toast.makeText(context as Activity, errorMessage, Toast.LENGTH_LONG).show()
}
}
}
}
}
interface OnGpsListener {
fun gpsStatus(isGPSEnable: Boolean)
}
}
class AssigmentFragment : Fragment() {
var isGPS: Boolean = false
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
val rootView = inflater.inflate(R.layout.fragment_assigment, container, false)
GPSUtils(activity!!).turnGPSOn { isGPSEnable ->
isGPS = isGPSEnable
}
}
}
MyAssigmentFragment.kt
class GPSUtils(context: Context) {
private var context: Context
private var mSettingsClient: SettingsClient
private var mLocationSettingsRequest: LocationSettingsRequest
private var locationManager: LocationManager
private var locationRequest: LocationRequest
init {
this.context = context
locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
mSettingsClient = LocationServices.getSettingsClient(context)
locationRequest = LocationRequest.create()
locationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
locationRequest.interval = (10 * 1000).toLong()
locationRequest.fastestInterval = (2 * 1000).toLong()
val builder = LocationSettingsRequest.Builder().addLocationRequest(locationRequest)
mLocationSettingsRequest = builder.build()
builder.setAlwaysShow(true) //this is the key ingredient
}
fun turnGPSOn(onGpsListener: OnGpsListener) {
if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
if (onGpsListener != null) {
onGpsListener!!.gpsStatus(true)
}
} else {
mSettingsClient.checkLocationSettings(mLocationSettingsRequest)
.addOnSuccessListener(context as Activity) {
if (onGpsListener != null) {
onGpsListener!!.gpsStatus(true)
}
}.addOnFailureListener(context as Activity) { e ->
val statusCode = (e as ApiException).statusCode
when (statusCode) {
LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> try {
val rae = e as ResolvableApiException
rae.startResolutionForResult(context as Activity, 1001)
} catch (sie: IntentSender.SendIntentException) { Log.i(TAG, "PendingIntent unable to execute request.") }
LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
val errorMessage = "Location settings are inadequate, and cannot be " + "fixed here. Fix in Settings."
Log.e(TAG, errorMessage)
Toast.makeText(context as Activity, errorMessage, Toast.LENGTH_LONG).show()
}
}
}
}
}
interface OnGpsListener {
fun gpsStatus(isGPSEnable: Boolean)
}
}
class AssigmentFragment : Fragment() {
var isGPS: Boolean = false
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
val rootView = inflater.inflate(R.layout.fragment_assigment, container, false)
GPSUtils(activity!!).turnGPSOn { isGPSEnable ->
isGPS = isGPSEnable
}
}
}
我得到了这个错误:
我不知道还有什么好尝试的,欢迎有想法。
提前感谢您的帮助。试试这个:
GPSUtils(activity!!).turnGPSOn(object: GPSUtils.OnGpsListener {
override fun gpsStatus(isGPSEnable: Boolean) {
// Code block ...
}
})
试试这个:
GPSUtils(activity!!).turnGPSOn(object: GPSUtils.OnGpsListener {
override fun gpsStatus(isGPSEnable: Boolean) {
// Code block ...
}
})
如果您真的想使用这种简短的符号,您可以用Java编写接口:
interface OnGpsListener {
void gpsStatus(boolean isGPSEnable);
}
通过这种方式,您可以通过以下方式在kotlin代码中使用它:
GPSUtils(activity!!).turnGPSOn(OnGpsListener { isGPSEnable ->
isGPS = isGPSEnable
})
问题在于SAM转换仅适用于java接口,本文将对此进行一些解释:
如果您要将java代码移植到kotlin,那么呈现java接口可能会很方便,如前所述。如果您真的想使用这种简短的表示法,您可以用java编写接口:
interface OnGpsListener {
void gpsStatus(boolean isGPSEnable);
}
通过这种方式,您可以通过以下方式在kotlin代码中使用它:
GPSUtils(activity!!).turnGPSOn(OnGpsListener { isGPSEnable ->
isGPS = isGPSEnable
})
问题在于SAM转换仅适用于java接口,本文将对此进行一些解释:
如果您正在将java代码移植到kotlin,那么呈现java接口可能会很方便,正如所说。谢谢!!Szilárd Gerlei谢谢你!!斯吉拉德·格雷