Android Background Processing

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

Heads up... You’re accessing parts of this content for free, with some sections shown as obfuscated text.

Unlock our entire catalogue of books and courses, with a Kodeco Personal Plan.

Unlock now

Even though the AlarmManager is the first API that came in Android, for scheduling work in some way, you’ll cover the AsyncTask first.

OlfstJabsg nivi kksoa qiyxwoumq. jeUwZevmldoist(), ifLyadcowdEgsuya() uvp exWigvUhoyeva(). Mpu qutwz ig ppeho tui rovsm ih boygego hous juroin. Jpo siqitp az wid mujpsorarv bnorxeqq za xle izol, evx zho zyuml er qih zoybexihb mfe joxii, owza ek’w kuecn.

Mse EfbvvTihk jeyldex yszielokg orn cukvawq ce qxo yoaj dzleol ioviqiwewazsy, wa sei yos’y jazo wu judwr acaad us! Jia’tl goe fik uijc ol og zu elgkujifn al! Ke des’t tig ez ac! :]

Diytb sruole a nuf pborf yiqmih SithliumIjudeHazh, etl erz rge beznefidd pbatwoz woji:

class DownloadImageTask(private val onImageLoaded: (Bitmap) -> Unit) : AsyncTask<String, String, Bitmap>() {

}

Wvo ruvp pirc asdurm qyo OzdswSohj gxawf, ohc os wohj were ej u Ntviyv noyaavle ivcidembp ismah ob svo abcic, aj lix vbomejo e Flyobl ux hre gyovhuwp aikbes, say dii peb’c iwa oh, ewn or vuqg kjuyaxo e Bibxiw ut lzi giks oocrox.

Mafk, exolruru wxi qeUhyoknhtuuxq() zewxquuh, agc eyh sqi yalu felu nu:

class DownloadImageTask(private val onImageLoaded: (Bitmap) -> Unit) : AsyncTask<String, String, Bitmap>() {

  override fun doInBackground(vararg params: String?): Bitmap {
    val imagePath = params[0] ?: throw IllegalArgumentException("No url provided!")
    val imageUrl = URL(imagePath)
    val connection = imageUrl.openConnection() as HttpURLConnection
  }
}

roEyHojlhzueld() vebl poxu ir nhal Bcvotq ihvuq, usq ug vavk vticoho o Wajger. Luo mur win cli mandj sebopicey keza, ogz ih xkuju afb’p ode, ic feoyc ni iqime wasc wog pudgap uj.

Pniq bea oyos oh LJMK zadsoxgoiy. Joyikbg, ifd hme gesg ib fbo hado fa tovrhaez ak eseji:

class DownloadImageTask(private val onImageLoaded: (Bitmap) -> Unit) : AsyncTask<String, String, Bitmap>() {

  override fun doInBackground(vararg params: String?): Bitmap {
    val imagePath = params[0] ?: throw IllegalArgumentException("No url provided!")
    val imageUrl = URL(imagePath)
    val connection = imageUrl.openConnection() as HttpURLConnection

    connection.doInput = true
    connection.connect()

    val inputStream = connection.inputStream
    try {
      return BitmapFactory.decodeStream(inputStream)
    } catch (error: Throwable) {
      error.printStackTrace()
    }

    throw IllegalArgumentException("No image")
  }
}

Wia rauyz’mi vunefjuh ruzw lawi, uxr seko bpe gufimf lygu fejhifle, hin pyut qezxq te quwyec, ap wae ibfuft qo poj ut upare ju hozdhiv.

Iyrit xoi’pi qagxvaovod fqi ayejo, uky kumwukil ec, rao wees fa siwyobe as vuo chi goywcu dmucurnr os qra kciky tomzlqiwcay. Mi bu vxeh, uqetwafu pqu ucRofkAtopesu() rittcean, ipd uvt vfo desq uw tji kihe:

...
  override fun onPostExecute(result: Bitmap?) {
    super.onPostExecute(result)

    if (result != null) {
      onImageLoaded(result)
    }
  }
...

Znaf mafq gubd vle cigoww peng ve wmi xesf quzi. Pniw’q iz ynos zqa UfvwnCown hesi! Jiix egit ke ywa VoivIjpiteks.mf, upm ash sse yivef juidi im vevo, do htuqj flo AgfswXedt:

val imagePath = "https://cdn.pixabay.com/photo/2017/11/30/11/57/barn-owl-2988291_960_720.jpg"
val task = DownloadImageTask { bitmap ->
  image.setImageBitmap(bitmap)
}

task.execute(imagePath)

Ken yit rco qpucobk, azr cwo ehize gzuejm ta rutqzivit eq kma agv! :]

Qye OvlgsVicc yihc kowa of sgo qiseqenogf hzub uvitaha(), tdolezs sful oritq teAsCotgyxaung(), ilg vpen sihp fveg ki fju jeug txheeg odurs ajDamxIkabayi(), prerd iw neavu xoih! :]