Question

I have an app that generates a report in a TableLayout with a variable number of TableRows.

I use the following code to capture the Table into a bitmap:

TableLayout tl = (TableLayout)findViewById(R.id.CSRTableLayout);
Bitmap csr = Bitmap.createBitmap(tl.getWidth(), tl.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(csr);
tl.draw(canvas);

After I capture the screen as a bitmap, I attach it to an email using:

//folder already exists
File file = new File(folder.getAbsolutePath()+"/CSR"+csrnum+".jpg");
BufferedOutputStream bos = null;
FileOutputStream fos = null;
try {
    fos=new FileOutputStream(file);
    bos=new BufferedOutputStream(fos);
    if(bos!=null) {
        try {
            csr.compress(Bitmap.CompressFormat.JPEG, 60, bos);
        } catch (OutOfMemoryError e) {
            Toast.makeText(CustomerReportActivity.this, "Out of Memory!", Toast.LENGTH_SHORT).show();
        } finally {
            fos.flush();
            fos.close();
            bos.flush();
            bos.close();
        }
    }
} catch (Exception e) {
    e.printStackTrace();
}
if(file.exists()) {
    Intent i = new Intent(Intent.ACTION_SEND);
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    i.setType("message/rfc822");
    String emailTo[] = {"***@****.***"}; 
    i.putExtra(Intent.EXTRA_EMAIL,emailTo);
    i.putExtra(Intent.EXTRA_SUBJECT,"...");
    i.putExtra(Intent.EXTRA_TEXT, "...");
    i.putExtra(Intent.EXTRA_STREAM,Uri.parse("file://"+file.getAbsolutePath()));
    startActivity(i);
} else {
    Toast.makeText(CustomerReportActivity.this, "Error attaching report to email!", Toast.LENGTH_SHORT).show();
}

The problem is that sometimes the table can get quite large, such as 1600x2400dp. I have gotten an OutOfMemoryError on the line “Bitmap.createBitmap(…)” Is there an alternative method to capture the screen while not overflowing the VM heap? If I understand correctly, calling Bitmap.createBitmap(…) is creating a bitmap the full size that is all just plain white. Is it possible to create it with NO pixel data and only fill it in once I called csr.compress(…) so that way it stays small? Any ideas/suggestions are greatly appreciated! Thanks in advance!

Answer 1

Unfortunately there was no way to avoid my issue. I simply had to use a lower quality setting and hope the size did not become too big. Trying to scale the bitmap did not work properly and ended up with a distorted image.