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App/Activity: Change file related Java libraries to Kotlin #39

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merged 1 commit into from
Jun 14, 2024
+17 −31
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App/Activity: Change file related Java libraries to Kotlin #39

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48 changes: 17 additions & 31 deletions ml_inference_offloading/src/main/java/ai/nnstreamer/ml/inference/offloading/MainActivity.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,7 @@ import androidx.compose.ui.Modifier
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.io.OutputStream

// todo: Define DTO with generality and extensibility
data class ModelInfo(
Expand Down Expand Up @@ -78,39 +76,27 @@ class MainActivity : ComponentActivity() {
mService = null
}
}

private fun copyFilesToExternalDir() {
val am = resources.assets
var files: Array<String>? = null

try {
files = am.list("models/")
} catch (e: java.lang.Exception) {
Log.e(TAG, "#### Failed to get asset file list")
e.printStackTrace()
return
}

// Copy files into app-specific directory.
for (filename in files!!) {
try {
val inFile = am.open("models/$filename")
val outDir = getExternalFilesDir(null)!!.absolutePath
val outFile = File(outDir, filename)
val out: OutputStream = FileOutputStream(outFile)

val buffer = ByteArray(1024)
var read: Int
while ((inFile.read(buffer).also { read = it }) != -1) {
out.write(buffer, 0, read)
am.list("models/")?.let { fileArray ->
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Kotlin list does not raise exceptions unlike Java
https://developer.android.com/reference/kotlin/android/content/res/AssetManager#list

// Copy files into app-specific directory.
fileArray.forEach { fileName ->
try {
val inFile = am.open("models/$fileName")
inFile.use { stream ->
val outDir = getExternalFilesDir(null).toString()
File(outDir, fileName).outputStream().use {
stream.copyTo(it)
}
}
}
catch (e: IOException) {
Log.e(TAG, "Failed to copy file: $fileName")
e.printStackTrace()
return
}

inFile.close()
out.flush()
out.close()
} catch (e: IOException) {
Log.e(TAG, "Failed to copy file: $filename")
e.printStackTrace()
return
}
}
}
Expand Down