android - IntentService 已弃用，如何将其替换为 JobIntentService？

Question

关注 FetchAddressIntentService使用 IntentService 实现(在 Kotlin ):

class FetchAddressIntentService  //Constructor of this service
    : IntentService(INTENTTAG) {
    //Receiver where results are forwarded from this service
    protected var resultReceiver: ResultReceiver? = null

    private val TAG by lazy { this::class.java.simpleName }

    //Intent Service handler
    override fun onHandleIntent(intent: Intent?) { //Errormessages
        var errorMessage = ""
        if (intent != null) {
            resultReceiver =
                intent.getParcelableExtra(RECEIVER)
        }
        //Checks if receiver was properly registered
        if (resultReceiver == null) {
            Log.wtf(
                TAG,
                "No reciever received. There is nowhere to send the results !!"
            )
            return
        }
        //Get the location passed to this service through an extra.
        var location: Location? = null
        if (intent != null) {
            location =
                intent.getParcelableExtra(LOCATION_DATA_EXTRA)
        }
        //Make sure the location is really sent
        if (location == null) {
            errorMessage = getString(R.string.gis_error_no_location_data_provided)
            Log.wtf(TAG, errorMessage)
            deliverResultToReceiver(FAILURE_RESULT, errorMessage)
            return
        }
        //Setting locale
        val geocoder = Geocoder(this, Locale.ROOT)
        //Address found
        var addresses: List<Address>? = null
        try {
            addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
            Log.i(TAG,"rec: address = ${addresses[0]}")
        } catch (ioException: IOException) { //Catches network or i/o problems
            errorMessage = getString(R.string.gis_error_service_not_available)
            Log.e(TAG, errorMessage, ioException)
        } catch (illegalArgumentException: IllegalArgumentException) { //Error in latitude or longitude data
            errorMessage = getString(R.string.gis_error_invalid_lat_long_used)
            Log.e(
                TAG,
                errorMessage + ". Latitude = " + location.latitude +
                        ", Longitude = " + location.longitude,
                illegalArgumentException
            )
        }
        //Handles cases where no addresses where found
        if (addresses == null || addresses.isEmpty()) {
            if (errorMessage.isEmpty()) {
                errorMessage = getString(R.string.gis_error_no_address_found)
                Log.e(TAG, errorMessage)
            }
            deliverResultToReceiver(FAILURE_RESULT, errorMessage)
        } else {
            val address = addresses[0]
            //deliverAddressToReceiver(SUCCESS_RESULT, address)
            deliverAddressToReceiver2(SUCCESS_ADDRESS,address)
        }
    }

    private fun deliverAddressToReceiver2(
        resultCode: Int,
        address: Address
    ){
        val bundle = Bundle()
        bundle.putParcelable("address",address)
        resultReceiver?.send(resultCode,bundle)
    }

    private fun deliverResultToReceiver(resultCode: Int, message: String) {
        val bundle = Bundle()
        bundle.putString(RESULT_DATA_KEY, message)
        resultReceiver!!.send(resultCode, bundle)
    }

    companion object {
        private const val INTENTTAG = "FetchAddressIS"
    }
}

有没有人建议我如何替换 IntentService与 JobIntentService以一种好的方式？
IntentService在 Android-R/Android-11 中已弃用。

我已经尝试关注这方面的一些帖子，但没有人指导正确的路径如何以 AddressFetchIntentService 使用 IntentService 的方式将 IntentService 调用的可用性更改为 JobIntentService 调用。 .

RG

Answer 1

class FetchAddressIntentService : JobIntentService() {

    // This method is called when service starts instead of onHandleIntent
    override fun onHandleWork(intent: Intent) {
        onHandleIntent(intent)
    }

    // remove override and make onHandleIntent private.
   private fun onHandleIntent(intent: Intent?) {}

    // convenient method for starting the service.
    companion object {
        fun enqueueWork(context: Context, intent: Intent) {
            enqueueWork(context, FetchAddressIntentService::class.java, 1, intent)
        }
    }
}

您可以将服务启动为

    val intent = Intent(this, FetchAddressIntentService::class.java)
    FetchAddressIntentService.enqueueWork(this, intent)

重要的:

您需要为 list 添加权限。
<uses-permission android:name="android.permission.WAKE_LOCK" />//pre-oreo 设备需要

还

<service
    android:name=".FetchAddressIntentService"
    android:permission="android.permission.BIND_JOB_SERVICE" // needed for oreo and above
    android:exported="true"/>

阅读更多 here

添加于格林威治标准时间 2020.06.02 19:20 作者:Roar Grønmo

我将代码更改为:

class FetchAddressJobIntentService:JobIntentService()
{
    private val TAG by lazy { this::class.java.simpleName }

    protected var resultReceiver: ResultReceiver? = null

    /*
    override fun onHandleWork(intent: Intent) {
        onHandleIntent(intent)
    }*/

    override fun onHandleWork(intent: Intent) { //Errormessages
        var errorMessage = ""

        resultReceiver = intent.getParcelableExtra(RECEIVER)

        //Checks if receiver was properly registered
        if (resultReceiver == null) {
            Log.wtf(
                TAG,
                "No reciever received. There is nowhere to send the results !!"
            )
            return
        }
        //Get the location passed to this service through an extra.
        var location: Location? = null

        location = intent.getParcelableExtra(LOCATION_DATA_EXTRA)

        //Make sure the location is really sent
        if (location == null) {
            errorMessage = getString(R.string.gis_error_no_location_data_provided)
            Log.wtf(TAG, errorMessage)
            deliverResultToReceiver(FAILURE_RESULT, errorMessage)
            return
        }
        //Setting locale
        val geocoder = Geocoder(this, Locale.ROOT)
        //Address found
        var addresses: List<Address>? = null
        try {
            addresses = geocoder.getFromLocation(location.latitude, location.longitude, 1)
            Log.i(TAG,"rec: address = ${addresses[0]}")
        } catch (ioException: IOException) { //Catches network or i/o problems
            errorMessage = getString(R.string.gis_error_service_not_available)
            Log.e(TAG, errorMessage, ioException)
        } catch (illegalArgumentException: IllegalArgumentException) { //Error in latitude or longitude data
            errorMessage = getString(R.string.gis_error_invalid_lat_long_used)
            Log.e(
                TAG,
                errorMessage + ". Latitude = " + location.latitude +
                        ", Longitude = " + location.longitude,
                illegalArgumentException
            )
        }
        //Handles cases where no addresses where found
        if (addresses == null || addresses.isEmpty()) {
            if (errorMessage.isEmpty()) {
                errorMessage = getString(R.string.gis_error_no_address_found)
                Log.e(TAG, errorMessage)
            }
            deliverResultToReceiver(FAILURE_RESULT, errorMessage)
        } else {
            val address = addresses[0]
            //deliverAddressToReceiver(SUCCESS_RESULT, address)
            deliverAddressToReceiver2(SUCCESS_ADDRESS,address)
        }
    }

    private fun deliverAddressToReceiver2(
        resultCode: Int,
        address: Address
    ){
        val bundle = Bundle()
        bundle.putParcelable("address",address)
        resultReceiver?.send(resultCode,bundle)
    }

    private fun deliverResultToReceiver(resultCode: Int, message: String) {
        val bundle = Bundle()
        bundle.putString(RESULT_DATA_KEY, message)
        resultReceiver!!.send(resultCode, bundle)
    }



    companion object{
        fun enqueueWork(context: Context, intent: Intent){
            enqueueWork(context,FetchAddressJobIntentService::class.java, 1, intent)
        }
    }

}