Android Open Source - Chopping One Direction Scroll View

• Back to UI/bootstrap  ↑

From Project

Back to project page Chopping.

License

The source code is released under:

Apache License

Java Source Code

package com.chopping.utils.views;
// w ww .ja v  a 2  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.widget.ScrollView;

public class OneDirectionScrollView extends ScrollView {
  private GestureDetector mGestureDetector;
  private boolean mAllowTouch = true;

  public OneDirectionScrollView(Context context, AttributeSet attrs) {
    super(context, attrs);
    if (!isInEditMode()) {
      mGestureDetector = new GestureDetector(context, new YScrollDetector());
    }
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    if (mGestureDetector != null) {
      mGestureDetector.onTouchEvent(ev);
    }
    if (mAllowTouch) {
      return super.onInterceptTouchEvent(ev);
    }
    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) {
      if (Math.abs(distanceY) > Math.abs(distanceX)) {
        mAllowTouch = true;
        return true;
      }
      mAllowTouch = false;
      return false;
    }
  }
}

Java Source Code List

• Back to UI/bootstrap  ↑