Rotate a saved bitmap in android

java android bitmap android-image
prometheuspk picture prometheuspk · Apr 26, 2012 · Viewed 18.3k times · Source

I am saving an image from the camera that was in landscape mode. so it gets saved in landscape mode and then i apply an overlay onto it that too is in landscape mode. I want to rotate that image and then save. e.g. if i have this

enter image description here

I want to rotate clockwise by 90 degrees once and make it this and save it to sdcard:

enter image description here

How is this to be accomplished?

Answer

MAC picture MAC · Apr 26, 2012 
void rotate(float x)
    {
        Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),R.drawable.tedd);

        int width = bitmapOrg.getWidth();

        int height = bitmapOrg.getHeight();


        int newWidth = 200;

        int newHeight  = 200;

        // calculate the scale - in this case = 0.4f

         float scaleWidth = ((float) newWidth) / width;

         float scaleHeight = ((float) newHeight) / height;

         Matrix matrix = new Matrix();

         matrix.postScale(scaleWidth, scaleHeight);
         matrix.postRotate(x);

         Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,width, height, matrix, true);

         iv.setScaleType(ScaleType.CENTER);
         iv.setImageBitmap(resizedBitmap);
    }

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