Crop image ala Google Goggles

Question

I'm trying to do some ROI (region of interest) selection in my app, but I don´t know, how to create some kind of resizable (by fingers) rectangle like you can see in Google Goggles. Can you help me? Is there any source code example?

any chance you can post your moveCorner and setCorner methods? — CompEng88, Oct 11 '11 at 23:11

score 2 · Accepted Answer · answered Apr 14 '11 at 21:33

My final solution is to draw and rectangle in the midle of a view and implement onTouchEvent() in my activity to set new corners coordinates like this:

@Override
public boolean onTouchEvent(MotionEvent me) {
    if(SETTING_ROI == true){
        if (me.getAction() == MotionEvent.ACTION_DOWN) {
            START_DRAGGING = true;
            myView.selectCorner((int) me.getRawX(), (int) me.getRawY()); // selecst nearest corner
        }
        if (me.getAction() == MotionEvent.ACTION_MOVE){
            Log.d(TAG, "ACTION_MOVE");
            myView.moveCorner((int) me.getRawX(), (int) me.getRawY()); // move selected corner continuously
        }
        if (me.getAction() == MotionEvent.ACTION_UP){
            if (START_DRAGGING == true) {
                START_DRAGGING = false;
                myView.moveCorner((int) me.getRawX(), (int) me.getRawY()); // final selected corner move
            }
        }
    }
    return false;
}

score 0 · Answer 2 · edited Jul 24 '17 at 15:23

0

Could you reuse code from the Gallery-Cropper?

The CropImage class source code is available here.

edited Jul 24 '17 at 15:23

Vadim Kotov

8,084
8
48
62

answered Mar 21 '11 at 03:16

Nick

3,504
2
39
78

It seems too complex. I will better appreciate just an example of How to create an rectangle and move its corners to all directions to create an custom selection. – Komi Mar 22 '11 at 21:44

Crop image ala Google Goggles

2 Answers2

Linked