So I have thousands of coordinates that i need to plot and one of the best method i know is by saving the coordinates as .txt in asset folder and then pull it by using
val json_string = application.assets.open(file_name).bufferedReader().use{it.readText()}
But when the file is pulled, it read the file as a string, despite the file is saved in array format such as follow:
"97.951476367000055,3.155017079000061","97.951800004000063,3.154406602000051","97.949325673000033,3.156145963000029","97.948721732000081,3.15657051200003","97.948646156000052,3.156623638000042","97.947494978000066,3.15786896100002","97.94724135000007,3.158143331000076","97.947000011000057,3.158404405000056","97.946790649000036,3.158630887000072","97.946272953000062,3.15919092200005","97.945702608000033,3.15980791000004","97.945553326000038,3.159969400000023","97.944601930000033,3.160998592000055","97.944409762000078,3.161206474000039"....
I want to read the asset in an array format, for example, it is divided by comma and grouped by quotes, for example:
How can I read this .txt file asset as string array or ArrayList< String > format in Kotlin?
Thanks!
Create a model like below
data class Coordinate(val latitude: String, val longitude: String)
// Function to read coordinates from the asset file and convert to ArrayList
fun readCoordinatesFromAsset(context: Context, assetFileName: String):
ArrayList<String> {
val gson = Gson()
val arrayList = ArrayList<String>()
try {
context.assets.open(assetFileName).use { inputStream ->
val reader = InputStreamReader(inputStream)
val coordinates = gson.fromJson(reader, ArrayList::class.java)
// Convert the ArrayList of Coordinate objects to an ArrayList of strings
for (coordinate in coordinates) {
arrayList.add(coordinate.toString())
}
}
} catch (e: Exception) {
e.printStackTrace()
}
return arrayList
}
Your text file should be like the below format
coordinate.txt
[
"97.951476367000055,3.155017079000061",
"97.951800004000063,3.154406602000051",
"97.949325673000033,3.156145963000029",
"97.948721732000081,3.15657051200003",
"97.948646156000052,3.156623638000042",
"97.947494978000066,3.15786896100002",
"97.94724135000007,3.158143331000076",
"97.947000011000057,3.158404405000056",
"97.946790649000036,3.158630887000072",
"97.946272953000062,3.15919092200005",
"97.945702608000033,3.15980791000004",
"97.945553326000038,3.159969400000023",
"97.944601930000033,3.160998592000055",
"97.944409762000078,3.161206474000039"
]
You can call the method as
val resulArray: ArrayList<String> =readCoordinatesFromAsset(this,"coordinate.txt")