I am working on Android application, where I am creating a QR code by using the QR generation library. I have achieved the QR code generation as by sending data from previews Activity to the main Activity where I have generated and shown the QR code.
The issue takes place in the process of saving QR code to the gallery and sharing the same QR code.
I have implemented sharing intent but it says the intent cannot share an empty file.
The same issue appears when I try to save the file.
Basically file with the QR code is always empty.
Here is my code for sharing and QR generation:
class QRGenerationAll : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.qr_generation_all)
val byteArray = intent.getByteArrayExtra("logoimage")
val bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)
img_logoimage.setImageBitmap(bmp)
val valuecatchedvalues: String = intent.getStringExtra("sendedvalues")
tv_textforqr.setText(valuecatchedvalues)
val tv_textforqr: String = intent.getStringExtra("logotext")
tv_textforlogoname.setText(tv_textforqr)
try {
//setting size of qr code
val manager = getSystemService(WINDOW_SERVICE) as WindowManager
val display = manager.defaultDisplay
val point = Point()
display.getSize(point)
val width = point.x
val height = point.y
val smallestDimension = if (width < height) width else height
// val qrInput = findViewById(R.id.qrInput) as EditText
//setting parameters for qr code
val charset = "UTF-8" // or "ISO-8859-1"
val hintMap: MutableMap<EncodeHintType, ErrorCorrectionLevel> = HashMap()
hintMap[EncodeHintType.ERROR_CORRECTION] = ErrorCorrectionLevel.L
if (valuecatchedvalues!=null) {
createQRCodeText(
valuecatchedvalues,
charset,
hintMap,
smallestDimension,
smallestDimension
) //MAIN METHOD FOR QR GENERATE
}
} catch (ex: Exception) {
Log.e("QrGenerate", ex.message)
}
buttonshare.setOnClickListener(View.OnClickListener {
val sharingIntent = Intent(Intent.ACTION_SEND)
sharingIntent.type = "text/plain"
sharingIntent.putExtra(Intent.EXTRA_SUBJECT, "Subject Here")
sharingIntent.putExtra(Intent.EXTRA_TEXT, bmp)
startActivity(
Intent.createChooser(
sharingIntent,
resources.getString(R.string.app_name)
)
)
})
}
private fun createQRCodeText(
valueqrTextData: String,
charset: String,
hintMap: MutableMap<EncodeHintType, ErrorCorrectionLevel>,
smallestDimension: Int,
smallestDimension1: Int
) {
try {
//generating qr code in bitmatrix type
val matrix = MultiFormatWriter().encode(
String(
valueqrTextData.toByteArray(charset(charset)), kotlin.text.charset(charset)
), BarcodeFormat.QR_CODE, smallestDimension, smallestDimension1, hintMap
)
//converting bitmatrix to bitmap
val width = matrix.width
val height = matrix.height
val pixels = IntArray(width * height)
// All are 0, or black, by default
for (y in 0 until height) {
val offset = y * width
for (x in 0 until width) {
pixels[offset + x] = if (matrix[x, y]) Color.BLACK else Color.WHITE
}
}
val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
bitmap.setPixels(pixels, 0, width, 0, 0, width, height)
//setting bitmap to image view
val myImage = findViewById(R.id.imageView1) as ImageView
myImage.setImageBitmap(bitmap)
} catch (er: java.lang.Exception) {
Log.e("QrGenerate", er.message)
}
}
}
The following snippet is related to extracting text from previous Activity and generating QR in the receiving Activity.
val byteArray = intent.getByteArrayExtra("logoimage")
val bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)
img_logoimage.setImageBitmap(bmp)
val valuecatchedvalues: String = intent.getStringExtra("sendedvalues")
tv_textforqr.setText(valuecatchedvalues)
val tv_textforqr: String = intent.getStringExtra("logotext")
tv_textforlogoname.setText(tv_textforqr)
There is the only issue I am Facing here. I have QR image generated but as I try to share and save it it seems impossible for me.
Here is the Message after Share intent
I have searched this link for guidance Link 1
