How to cut the image Rectangular 600x200?

Question

how can I fix the size of the cut-rectangle like what I want ? i would like to get it rectangular 600x200 the user can resize it but proportional only

i use codes like this :

private void performCrop() {
Intent cropIntent = new Intent("com.android.camera.action.CROP");
cropIntent.setDataAndType(pickedImage, "image/*");
//set crop properties
cropIntent.putExtra("crop", "true");
//indicate aspect of desired crop
cropIntent.putExtra("aspectX", 1);
cropIntent.putExtra("aspectY", 1);
//indicate output X and Y
cropIntent.putExtra("outputX", 600);
cropIntent.putExtra("outputY", 200);
//retrieve data on return
cropIntent.putExtra("return-data", true);
//start the activity - we handle returning in onActivityResult
startActivityForResult(cropIntent, PIC_CROP);}

I do not like square form like here

I like like this :

any Idea ?