Android Open Source - PhotoView Hacky View Pager

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License

The source code is released under:

Apache License

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Java Source Code

package uk.co.senab.photoview.sample;
//from  w w w . j ava  2  s  . c  om
import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;

/**
 * Found at http://stackoverflow.com/questions/7814017/is-it-possible-to-disable-scrolling-on-a-viewpager.
 * Convenient way to temporarily disable ViewPager navigation while interacting with ImageView.
 * 
 * Julia Zudikova
 */

/**
 * Hacky fix for Issue #4 and
 * http://code.google.com/p/android/issues/detail?id=18990
 * <p/>
 * ScaleGestureDetector seems to mess up the touch events, which means that
 * ViewGroups which make use of onInterceptTouchEvent throw a lot of
 * IllegalArgumentException: pointerIndex out of range.
 * <p/>
 * There's not much I can do in my code for now, but we can mask the result by
 * just catching the problem and ignoring it.
 *
 * @author Chris Banes
 */
public class HackyViewPager extends ViewPager {

  private boolean isLocked;
  
    public HackyViewPager(Context context) {
        super(context);
        isLocked = false;
    }

    public HackyViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        isLocked = false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
      if (!isLocked) {
          try {
              return super.onInterceptTouchEvent(ev);
          } catch (IllegalArgumentException e) {
              e.printStackTrace();
              return false;
          }
      }
      return false;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (!isLocked) {
            return super.onTouchEvent(event);
        }
        return false;
    }
    
  public void toggleLock() {
    isLocked = !isLocked;
  }

  public void setLocked(boolean isLocked) {
    this.isLocked = isLocked;
  }

  public boolean isLocked() {
    return isLocked;
  }
  
}

Java Source Code List