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Export/share generated barcode as JPG

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On request.

Generally, using a lossless format like PNG makes more sense.
This commit is contained in:
Markus Fisch 2024-06-02 14:00:27 +02:00
parent 2e7e9a942b
commit 8242520a0b
1 changed files with 24 additions and 6 deletions
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30
app/src/main/kotlin/de/markusfisch/android/binaryeye/fragment/BarcodeFragment.kt
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@ -46,7 +46,7 @@ import kotlin.math.min
class BarcodeFragment : Fragment() {
private enum class FileType {
PNG, SVG, TXT
PNG, JPG, SVG, TXT
}
private val parentJob = Job()
@ -214,6 +214,13 @@ class BarcodeFragment : Fragment() {
barcode.bitmap().saveAsPng(it)
}
FileType.JPG -> saveAs(
addSuffixIfNotGiven(fileName, ".jpg"),
MIME_JPG
) {
barcode.bitmap().saveAsJpg(it)
}
FileType.SVG -> saveAs(
addSuffixIfNotGiven(fileName, ".svg"),
MIME_SVG
@ -250,21 +257,28 @@ class BarcodeFragment : Fragment() {
private fun Context.shareAs(fileType: FileType) {
when (fileType) {
FileType.PNG -> share(barcode.bitmap())
FileType.PNG -> share(barcode.bitmap(), MIME_PNG, "png")
FileType.JPG -> share(barcode.bitmap(), MIME_JPG, "jpg")
FileType.SVG -> shareText(barcode.svg(), MIME_SVG)
FileType.TXT -> shareText(barcode.text())
}
}
private fun Context.share(bitmap: Bitmap) {
private fun Context.share(bitmap: Bitmap, mimeType: String, ext: String) {
scope.launch(Dispatchers.IO) {
val file = File(
externalCacheDir,
"shared_barcode.png"
"shared_barcode.$ext"
)
val success = try {
FileOutputStream(file).use {
bitmap.saveAsPng(it)
when (mimeType) {
MIME_PNG -> bitmap.saveAsPng(it)
MIME_JPG -> bitmap.saveAsJpg(it)
else -> throw IllegalArgumentException(
"Invalid mime type"
)
}
}
true
} catch (e: IOException) {
@ -272,7 +286,7 @@ class BarcodeFragment : Fragment() {
}
withContext(Dispatchers.Main) {
if (success) {
shareFile(file, "image/png")
shareFile(file, mimeType)
} else {
toast(R.string.error_saving_file)
}
@ -289,6 +303,7 @@ class BarcodeFragment : Fragment() {
private const val EC_LEVEL = "ec_level"
private const val COLORS = "colors"
private const val MIME_PNG = "image/png"
private const val MIME_JPG = "image/jpeg"
private const val MIME_SVG = "image/svg+xmg"
private const val MIME_TXT = "text/plain"
@ -392,6 +407,9 @@ private enum class Colors {
private fun Bitmap.saveAsPng(outputStream: OutputStream, quality: Int = 90) =
compress(Bitmap.CompressFormat.PNG, quality, outputStream)
private fun Bitmap.saveAsJpg(outputStream: OutputStream, quality: Int = 90) =
compress(Bitmap.CompressFormat.JPEG, quality, outputStream)
private val fileNameCharacters = "[^A-Za-z0-9]".toRegex()
private fun encodeFileName(name: String): String = fileNameCharacters
.replace(name, "_")