如何在裁剪意图期间旋转图像

Question

There are some old posts here concerning this, but things seem to have changed. Yesterday I got an answer for a straightforward way to crop an image using an intent . The second part of the question is to add rotation functionality to the preview. Does anyone know how I might add this functionality? If it's rather complicated, does anyone know of an example out there?

Answer 1

I came across the same problem and used this work-around hack. The Intent called to crop uses a URI, while most solutions for rotations use the Bitmap. So what I did was:

1. Retrieve the bitmap from the URI

   Bitmap bmCameraCapture = BitmapFactory.decodeFile(Uri.fromFile(photo).getPath());

   Where photo is the new file you defined when triggering the camera Intent.

2. Rotate the bitmap

3. Get the URI of the rotated bitmap, I used the code from here

 public Uri getImageUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title",null); return Uri.parse(path); } 

4 . Trigger the crop intent based on this new URI

I'm assuming you are missing steps 1 & 3 and know how to do the other two.

Answer 2

Try this for implementing rotation

Bitmap bMap = BitmapFactory.decodeResource(getResources(),R.drawable.test);
Matrix mat = new Matrix();
mat.postRotate(90);
Bitmap bMapRotate = Bitmap.createBitmap(bMap, 0, 0,
bMap.getWidth(), bMap.getHeight(), mat, true);
BitmapDrawable bmd = new BitmapDrawable(bMapRotate);
image.setImageBitmap(bMapRotate);
image.setImageDrawable(bmd);

Hope it helps