How to filter string array (Kotlin)

Question

I'm new to Android development.

I'm making a qr code scanning application, I'm trying to filter the scan data and see if it's a link, but I don't know how to do this because I'm very new to kotlin. Does anyone have a solution for this question?

I want to filter the browsing data, if there is "https" in the scan result, I want to open the link on chrome automatically

Use `.contains` https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/contains.html — Ken Wolf, Mar 02 '23 at 15:20
If there is or begins with "https"? Also there are many libraries that already do this for you, do you actually want to implement this yourself for learning? — m0skit0, Mar 02 '23 at 15:42

Paolino L Angeletti · Accepted Answer · 2023-03-03T15:23:10.883

0

  for (i in scanned_list.indices) {
       single_scanned_value = scanned_list[i]
       if (single_scanned_value.contains("https")){
           //open browser.
       }
       break;
    }

For open browser, follow this link: https://www.tutorialkart.com/kotlin-android/android-open-url-in-browser-activity/

edited Mar 03 '23 at 15:23

answered Mar 02 '23 at 15:38

Paolino L Angeletti

162
10

Use filter instead of for/if. – m0skit0 Mar 02 '23 at 15:43
the problem about filter tool is that the final list could contains a lot of values, and if I have well understood the problem, user want to open browser of the first link finded. – Paolino L Angeletti Mar 02 '23 at 16:30
Your for loop will also open all links in the list, not only the first one. If you want only the first one, use find. – m0skit0 Mar 02 '23 at 17:46
I did try this answer also works.Thanks for support – egeKasal Mar 03 '23 at 17:28

dlsync · Answer 2 · 2023-03-03T08:59:53.723

0

up

val list = listOf("I'm happy", "https:are you happy?", "no one is")
list.first { item -> item.lowercase().contains("https") }.apply { 
        doSomething(this)
    }

for open link inside Chrome just follow the answer here -> How can I open a URL in Android's web browser from my application?

edited Mar 03 '23 at 08:59

answered Mar 02 '23 at 16:15

dlsync

1
1

the problem about filter tool is that the final list could contains a lot of values, and if I have well understood the problem, user want to open browser of the first link finded. – Paolino L Angeletti Mar 02 '23 at 16:30

How to filter string array (Kotlin)

2 Answers2