Read a Text asset(text file from assets folder) as a String in Kotlin (Android)

Question

I need to read a text file stored at src/main/assets/ i.e; in the assets folder and get it as a string.

Is there a simple way to do it.

Java copy, paste, convert functions are giving trouble, so I'd rather use a kotlin way.

I need a kotlin way to do this

Kotlinboy · Accepted Answer · 2018-01-08T08:31:42.977

87

I found this in a youtube video. Here is the link https://www.youtube.com/watch?v=o5pDghyRHmI

val file_name = "qjsonfile.json"
val json_string = application.assets.open(file_name).bufferedReader().use{
            it.readText()
        }

Saves the JSON or text to the string json_string.

edited Jan 08 '18 at 08:31

answered Nov 09 '17 at 12:27

Kotlinboy

3,725
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2

Please can u tell us how to wrtie on it – DINA TAKLIT May 11 '18 at 18:26
1

I tried this and it said "Unresolved reference: application" Not sure where I should be getting "application" from. – Wyck Aug 06 '20 at 17:59
1

@DINATAKLIT you can't write to file's located on asset folder. They are read only – Vahid Sep 29 '20 at 14:30
1

OP you should update that application is actually the context object. Thanks works well. – RanH Aug 04 '21 at 07:50
How to address the file in the project? – Mohsen Emami Jul 19 '23 at 10:20

Tatsuya Fujisaki · Answer 2 · 2020-07-13T14:53:23.613

9

You don’t need Application to read a text file in the assets folder.

fun readAsset(context: Context, fileName: String): String =
    context
        .assets
        .open(fileName)
        .bufferedReader()
        .use(BufferedReader::readText)

edited Jul 13 '20 at 14:53

answered Jul 13 '20 at 14:42

Tatsuya Fujisaki

1,434
15
18

score 7 · Answer 3 · answered Nov 12 '18 at 20:28

7

When in doubt close the stream yourself!

application.assets.open(file_name).apply {
                json_string = this.readBytes().toString(Charsets.UTF_8)
            }.close()

answered Nov 12 '18 at 20:28

Juan Mendez

2,658
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6

no need to `.close()` if you add the `. bufferedReader().use{...}` – Andrii Kovalchuk Apr 29 '19 at 12:52

Read a Text asset(text file from assets folder) as a String in Kotlin (Android)

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