如何在kotlin中将.txt资源转换为ArrayList<String>格式？

Question

所以我有数千个坐标需要绘制，我知道的最好方法之一是将坐标保存为资源文件夹中的.txt，然后使用

拉取它

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

但是当拉取文件时，它会将文件作为字符串读取，尽管文件以数组格式保存，如下所示：

"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"....

我想以数组格式读取资产，例如用逗号分隔并用引号分组，例如：

• “97.951476367000055,3.155017079000061”
• “97.951800004000063,3.154406602000051”
• “97.949325673000033,3.156145963000029”
• 等等...

如何在 Kotlin 中将这个 .txt 文件资源读取为字符串数组或 ArrayList< String > 格式？

谢谢！

Answer 1

创建如下所示的模型

data class Coordinate(val latitude: String, val longitude: String)

//从资源文件中读取坐标并转换为ArrayList的函数

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
}

您的文本文件应类似于以下格式

[
    "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"
]