I'm trying to save a bitmap to external storage. I have used the code that I have found in android - save image into gallery . However, the resulting file is 0 B in size but do contain thumbnail. My code is:
private fun saveBitmap(bitmap: Bitmap, name: String) {
val contentValues = contentValuesOf(
MediaStore.MediaColumns.TITLE to name,
MediaStore.MediaColumns.DISPLAY_NAME to name,
MediaStore.MediaColumns.MIME_TYPE to "images/jpeg",
MediaStore.MediaColumns.DATE_ADDED to System.currentTimeMillis()
)
val resolver = contentResolver
val uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues)
val outputStream = resolver.openOutputStream(uri!!)!!
bitmap.compress(Bitmap.CompressFormat.JPEG, 80, outputStream)
outputStream.flush()
outputStream.close()
}
Rather than saving to JPEG try saving as PNG
try (FileOutputStream out = new FileOutputStream(filename)) {
bmp.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance
// PNG is a lossless format, the compression factor (100) is ignored
} catch (IOException e) {
e.printStackTrace();
}
Please find similar question answered here
Also as mention in comment please check, have you taken permission for read/write access? If not then please refer the below code.
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Log.v(TAG,"Permission is granted");
//File write logic here
return true;
}
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