Restart Activity onPostExecute

Question

I develop an aplication that reads a QR Barcode then parses JSON from the result of the barcode (Using AsyncTask).

If the result is true then the app moves to another activity (I achieve this). But if the result false I want to restart the activity executed before from onPostExecute.

What should I do in my app to restart an activity from onPostExecute?

Here is my code

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

    // parse json
    val parsJson = JSONObject (result)
    var result = parsJson.get("status")

    if (result == Izin.SUKSES){
        Toast.makeText(context,"Berhasil intent ke activity lain",Toast.LENGTH_LONG).show()
        val intent = Intent(context,MainActivity::class.java)
        context.startActivity(intent)
    }
    else {
        Toast.makeText(context,"Gagal Scan Ulang",Toast.LENGTH_LONG).show()

        // What should i do to restart activity
    }
}

Does this answer your question? [Programmatically relaunch/recreate an activity?](https://stackoverflow.com/questions/2486934/programmatically-relaunch-recreate-an-activity) — Quanta, Jun 24 '20 at 08:26
i tried this before, i cant accsess getIntent from onPostExecute nor using content.getIntent() — Muhammad Farras Ma'ruf, Jun 24 '20 at 08:28
You don't need to access `getIntent` to recreate an activity ? — Quanta, Jun 24 '20 at 08:29

score 1 · Answer 1 · answered Jun 24 '20 at 08:39

You just need to call recreate on your activity instance-

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

    ....

    if (result == Izin.SUKSES) {
        ....
    } else {
        activity.recreate()
    }
}

This already has a mention here: Programmatically relaunch/recreate an activity?

kelvin · Accepted Answer · 2020-06-25T01:54:29.217

0

You can Simply use

startActivity(getIntent());
finish();

to refresh an Activity from within itself.

Alternatively you can call recreate() to refresh the activity.

edited Jun 25 '20 at 01:54

answered Jun 24 '20 at 08:34

kelvin

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You don't need to do this anymore. You can simply call `recreate()` on the activity, unless you are supporting devices lower than Honeycomb which is in-turn very impractical to me. – Quanta Jun 24 '20 at 08:35
He is new so it would be easier to him. – kelvin Jun 24 '20 at 08:39
@Qunata and @kelvin thaks for the answer. i already solve my problem. im using `startActivity(getIntent)` which getIntent in kotlin (idk) i should **init** it in onCreate then i pass it on argumen in AsynTask parameter. Thanks mates. – Muhammad Farras Ma'ruf Jun 24 '20 at 09:15
@MuhammadFarrasMa'ruf What you are passing in context? – kelvin Jun 24 '20 at 09:43
@kelvin `this@Activity` – Muhammad Farras Ma'ruf Jun 24 '20 at 20:11

Restart Activity onPostExecute

2 Answers2