How do I recreate the activity only once after opening the application?

Question

I tried to do this, but it didn't work. Endlessly recreate()

refreshLang() in onCreate

private fun refreshLang() {
    PreferenceManager.getDefaultSharedPreferences(this).apply {
        val checkRun = getString("FIRSTRUN", "DEFAULT")
        if (checkRun == "YES") {
            PreferenceManager.getDefaultSharedPreferences(this@MainActivity).edit().putString("FIRSTRUN", "NO").apply()
            recreate()
        }
    }
}

and SharPref.putString("FIRSTRUN", "YES").apply() in onDestroy to make it work again the next time you run it.

try replacing `(checkRun == "YES")` with `(checkRun.equals("YES"))` — Hamza Khan, Aug 21 '20 at 05:42

Akshay · Accepted Answer · 2020-08-21T07:48:52.537

1

Please refer: Activity class recreate()

It create new instance and initiates fresh activity lifecycle.

So when you call recreate() it will call onCreate() and will go in endless loop.

You have add some condition to avoid this overflow.

Edit:

Use .equals instead of ==

if ("YES".equals(checkRun)) {
   PreferenceManager.getDefaultSharedPreferences(this@MainActivity).edit().putString("FIRSTRUN", "NO").apply()
   recreate()
}

I suggest you not to use recreate(). It will call onCreate and onDestory().

Refer below code.

protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        boolean recreateRequested = true;
        Intent currentIntent = getIntent();
        if (currentIntent.hasExtra("recreateRequested")){
            recreateRequested = currentIntent.getBooleanExtra("recreateRequested", true);
        }
        if (recreateRequested) {
            Intent intent = new Intent(this, MyActivity.class);
            intent.putExtra("recreateRequested", false);
            startActivity(intent);
            finish();
        }
    }

edited Aug 21 '20 at 07:48

answered Aug 21 '20 at 05:34

Akshay

752
1
8
25

Yeah, I got it. Don't the conditions I wrote in the question solve this problem? – Hartaithan. Aug 21 '20 at 05:47
You should use .equals instead of ==. Answer is edited. – Akshay Aug 21 '20 at 05:53
It wont work if you put SharPref.putString("FIRSTRUN", "YES").apply() in OnDestroy(). because recreate() ultimately call OnDestory() – Akshay Aug 21 '20 at 07:36
Refer updated answer, if work please upvote and accept this answer – Akshay Aug 21 '20 at 07:49
Yeah, it works, but in my case it didn't solve the problem. (Problem with switch locales) – Hartaithan. Aug 22 '20 at 08:50

score 1 · Answer 2 · answered Aug 21 '20 at 05:47

you can't compare two Strings like this in your if condition

checkRun == "YES"

these are two separated instances of String, so they never be equal in the this meaning (== - same object)

use this instead

"YES".equals(checkRun)

equals will compare "content" of compared objects, in String case it will compare text

score -3 · Answer 3 · answered Aug 21 '20 at 05:33

-3

use onResume Method

 @Override
    public void onResume() {
        super.onResume();  // Always call the superclass method first
  
    }

answered Aug 21 '20 at 05:33

Android Developer

284
1
9

Doesn't answer the question – Abhimanyu Aug 21 '20 at 05:43
onResume() will trigger even after minimizing the application, and I need it to trigger only once, after **opening** the application. – Hartaithan. Aug 21 '20 at 05:44
Resume() is different than what recreate() does. – Akshay Aug 21 '20 at 05:54

How do I recreate the activity only once after opening the application?

3 Answers3