InterceptingScrollView, an Android ScrollView to use with SlidingUpPanel.

InterceptingScrollView.java

package com.doomonafireball.demo.android.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

/**
 * User: derek Date: 12/7/13 Time: 2:37 PM
 *
 * This ScrollView intercepts all gestures when enabled, except for events when it has already been scrolled to the
 * top.
 *
 * It is designed to work with the SlidingUpPanel.
 */
public class InterceptingScrollView extends ScrollView {

    private boolean mIsIntercepting = false;
    private float mCurrX = 0.0f;
    private float mCurrY = 0.0f;

    public InterceptingScrollView(Context context) {
        super(context);
    }

    public InterceptingScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public InterceptingScrollView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        super.onInterceptTouchEvent(event);
        getParent().requestDisallowInterceptTouchEvent(mIsIntercepting);
        final int action = event.getAction();
        if (action == MotionEvent.ACTION_DOWN) {
            mCurrX = event.getX();
            mCurrY = event.getY();
        }
        return super.onInterceptTouchEvent(event);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        final int action = event.getAction();
        if (action == MotionEvent.ACTION_MOVE) {
            if ((event.getY() - mCurrY) > Math.abs(event.getX() - mCurrX) && (getScrollY() <= 0.0f)
                    && mIsIntercepting) {
                // User scrolled vertically
                mIsIntercepting = false;
                getParent().requestDisallowInterceptTouchEvent(false);
            }
        }
        return super.onTouchEvent(event);
    }

    public void setIsIntercepting(boolean isIntercepting) {
        mIsIntercepting = isIntercepting;
        getParent().requestDisallowInterceptTouchEvent(isIntercepting);
    }
}

Hi Derek!
I am trying to use this custom scroll view with my SlidingUpPanel but I can`t get what I want. I will try to explain you what I need:

The thing is that i am adapting my layout for smaller screens, so I added a ScrollView in the second panel. It is something like Google Maps do. The problem is that, in bigger screens where scrollview is not needed, when you try to slide up or down the second panel, if you are touching the scrollView area, panel do not move...

Here u have a video where u can see the problem: https://www.dropbox.com/s/epk51xwud5rsw1d/SCR_20140804_201644.mp4

If you click on Factura (it is out of the scrollview) panel slide up perfectly. If you click below factura (it is the scrollview) panel do not move.

Would InterceptingScrollView.java fit my needs? Thanks very much,

Pablo López