Share PNG image using Intent (it changes image form png to jpeg)

Question

I want to make a function which share my images using Intent . Problem is; i have png images and when i share images using Intent, it change the format of image form png to jpeg . for example there is no background (transparent) of my image.png when i call intent to share, it changes image background to black and format to image.jpg.

Here is my code

 protected void ShareImage( )
    {
        Intent sharingIntent = new Intent(Intent.ACTION_SEND);   
        sharingIntent.setType("image/png");
        Bitmap imgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image );
        String imgBitmapPath=      MediaStore.Images.Media.insertImage(getContentResolver(),imgBitmap,"title",null);
        Uri imageUri=Uri.parse(imgBitmapPath);
        sharingIntent.putExtra(Intent.EXTRA_STREAM, imageUri);
        startActivity(Intent.createChooser(sharingIntent, "Share images to.."));
    }

Please Help me to share image without changing its format .. Thanks

Answer 1

MediaStore.Images.Media.insertImage always writes a JPEG. See its implementation .

You can easily adapt its code to write a PNG instead:

private void shareAsPng(Bitmap bitmap, String title)
{
    Long now = System.currentTimeMillis() / 1000;
    ContentValues values = new ContentValues();
    values.put(MediaStore.MediaColumns.DISPLAY_NAME, title);
    values.put(MediaStore.MediaColumns.MIME_TYPE, "image/png");
    values.put(MediaStore.MediaColumns.DATE_ADDED, now);
    values.put(MediaStore.MediaColumns.DATE_MODIFIED, now);
    ContentResolver cr = getContentResolver();
    Uri uri = cr.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
    try (OutputStream os = cr.openOutputStream(uri)) {
        bitmap.compress(Bitmap.CompressFormat.PNG, 0, os);
    }
    catch (IOException e) {
        cr.delete(uri, null, null);
        return;
    }

    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("image/png");
    intent.putExtra(Intent.EXTRA_STREAM, uri);
    startActivity(intent);
}

The compression quality parameter is documented to be ignored for PNG . I intentionally omitted IS_PENDING because that requires Android 10.

Answer 2

Convert bitmap to Uri

private Uri getImageUri(Context inContext, Bitmap inImage) {
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    inImage.compress(Bitmap.CompressFormat.PNG, 99, bytes);

    String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
    return Uri.parse(path);
}

and add your application manifest

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>