Android Open Source - infinitep Custom Scroll View

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License

The source code is released under:

Apache License

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Java Source Code

package es.daconstenla.infinip.customcomponents.pieces.data;
/* w w w .ja v a2  s. c o  m*/
import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ScrollView;

class CustomScrollView extends ScrollView {
    private GestureDetector gestureDetector;
    View.OnTouchListener gestureListener;

  public CustomScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
        gestureDetector = new GestureDetector(context,new YScrollDetector());
        setFadingEdgeLength(0);
  }
  
  @Override
  public boolean onTouchEvent(MotionEvent ev) {
      return super.onTouchEvent(ev);
  }
  
  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
      //Call super first because it does some hidden motion event handling
      boolean result = super.onInterceptTouchEvent(ev);
     //Now see if we are scrolling vertically with the custom gesture detector
     if (gestureDetector.onTouchEvent(ev)) {
          return result;
     } 
     //If not scrolling vertically (more y than x), don't hijack the event.
      else {
          return false;
     }
  }
  
  // Return false if we're scrolling in the x direction  
  class YScrollDetector extends SimpleOnGestureListener {
      @Override
      public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float     distanceY) {
        try {
            if (Math.abs(distanceY) > Math.abs(distanceX)) {
                return true;
            } else {
                return false;
            }
        } catch (Exception e) {
            // nothing
        }
        return false;
      }
  }
}

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