Question

I need to take a picture with the camera and, if depending on the picture size, rotate it before saving it into the gallery.

I’m using

Intent imageCaptureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageCaptureIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(imageCaptureIntent, IMAGE_CAPTURE);

To take the pic and save it to a temporary file.

Then

Bitmap bmp = BitmapFactory.decodeFile(imagePath);
String str = android.provider.MediaStore.Images.Media.insertImage(cr, bmp, name, description);

To save it.

This is the code i have tried to use to rotate the bitmap

Matrix matrix = new Matrix();
matrix.postRotate(180);
Bitmap x = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true);
android.provider.MediaStore.Images.Media.insertImage(cr, x, name, description);

The problem is I’m getting an OutOfMemoryException.

Is there a better way to handle the bitmaps to avoid breaking the memory?

~Thanks in advance, regards

Answer 1

I don’t think there is a better way to handle bitmaps. You could try to parse data directly from a file as Byte[] a portion at a time, and manipulating it in pieces; it’s hard and you’ll probably end up with very ugly code.

I also suggest the following:

• Use android.provider.MediaStore.Images.Media.insertImage(cr, imagePath, name, description) instead of android.provider.MediaStore.Images.Media.insertImage(cr, bmp, name, description) this way there is no need to call Bitmap bmp = BitmapFactory.decodeFile(imagePath) and no bitmap will be loaded into memory at that point.

• Throughout your code, make sure no bitmap is loaded unless needed. Set bitmaps that are no longer needed to null and call the garbage collector, or use bmp.recycle().