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[android] copy files from assets task util
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65 changes: 65 additions & 0 deletions
65
...d/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/utils/FileUtils.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package com.mapbox.mapboxsdk.testapp.utils | ||
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| import android.content.Context | ||
| import android.os.AsyncTask | ||
| import java.io.File | ||
| import java.io.FileOutputStream | ||
| import java.lang.ref.WeakReference | ||
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| class FileUtils { | ||
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| /** | ||
| * Task that copies a file from the assets directory to a provided directory. | ||
| * The asset's name is going to be kept in the new directory. | ||
| */ | ||
| class CopyFileFromAssetsTask(context: Context, listener: OnFileCopiedFromAssetsListener) : AsyncTask<String, Void, Boolean>() { | ||
| private val contextWeakReference: WeakReference<Context> = WeakReference(context) | ||
| private val listenerWeakReference: WeakReference<OnFileCopiedFromAssetsListener> = WeakReference(listener) | ||
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| override fun doInBackground(vararg strings: String): Boolean? { | ||
| val assetName = strings[0] | ||
| val destinationPath = strings[1] | ||
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| contextWeakReference.get()?.let { | ||
| try { | ||
| copyAsset(it, assetName, destinationPath) | ||
| } catch (ex: Exception) { | ||
| return false | ||
| } | ||
| } | ||
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| return true | ||
| } | ||
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| override fun onCancelled() { | ||
| listenerWeakReference.get()?.onError() | ||
| } | ||
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| override fun onPostExecute(result: Boolean) { | ||
| if (result) { | ||
| listenerWeakReference.get()?.onFileCopiedFromAssets() | ||
| } else { | ||
| listenerWeakReference.get()?.onError() | ||
| } | ||
| } | ||
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| private fun copyAsset(context: Context, assetName: String, destinationPath: String) { | ||
| val bufferSize = 1024 | ||
| val assetManager = context.assets | ||
| val inputStream = assetManager.open(assetName) | ||
| val outputStream = FileOutputStream(File(destinationPath, assetName)) | ||
| try { | ||
| inputStream.copyTo(outputStream, bufferSize) | ||
| } finally { | ||
| inputStream.close() | ||
| outputStream.flush() | ||
| outputStream.close() | ||
| } | ||
| } | ||
| } | ||
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| interface OnFileCopiedFromAssetsListener { | ||
| fun onFileCopiedFromAssets() | ||
| fun onError() | ||
| } | ||
| } |