How can I override the limitations of boolean PhotoViewAttacher onFling(MotionEvent, MotionEvent, float, float)?

Question

PhotoViewAttacher's boolean onFling(MotionEvent, MotionEvent, float, float) prevents my OnSingleFlingListener's onFling method from being called unless the current scale is the minimun.

I implemented OnSingleFlingListener from com.github.chrisbanes.photoview. However, since the onFling method is only package visible, PhotoViewAttacher's onFling method gets called first. PhotoViewAttacher.onFling prevents my onFling method from being called when scale > DEFAULT_MIN_SCALE. I need mine called unless scale > getMediumScale(). (scale == getMediumScale() when my image's width matches the window's width.) How can I get around this? Do I need to make my own copy of the entire PhotoView package and modify OnSingleFlingListener.onFling to be public?

My code:

public class BasicViewActivity extends AppCompatActivity implements DownloadCallback, OnSingleFlingListener {
@Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        . . . 
        return true;
    }

OnSingleFlingListener:

package com.github.chrisbanes.photoview;
public interface OnSingleFlingListener {
    boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY);
}

PhotoViewAttacher:

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
    if (mSingleFlingListener != null) {
        if (getScale() > DEFAULT_MIN_SCALE) {
            return false;
        }
        . . . 
        return mSingleFlingListener.onFling(e1, e2, velocityX, velocityY);
    }
    return false;
}

I want my onFling called when getScale() <= getMediumScale(). Instead, my onFling method is called only when getScale() == DEFAULT_MIN_SCALE.

Answer 1

I decided to work around it.

1. I cloned the PhotoView package.
2. I copied its source into my own package.

3. I changed the one line mentioned above (and added a fraction to prevent floating point error):

   if(getScale() > getMediumScale() + .01f) {
       return false;
   }