Control which directions the ViewPager can be scrolled, dynamically with UI feedback

Question

I\'m working on an app which uses many pages to swipe through, however at some pages I would like to be able to prevent scrolling to the next page until they\'ve selected so

Answer 1

you can use your custom view pager

public class CustomViewPager extends ViewPager
{   
float mStartDragX;
OnSwipeOutListener mListener;
Context context;
public static boolean enabled;

public CustomViewPager(Context context, AttributeSet attrs)
{
    super(context, attrs);
    this.context = context;
    enabled = true;
}


@Override
public boolean onTouchEvent(MotionEvent event)
{

    if (enabled) //view pager scrolling enable if true
    {
        return super.onTouchEvent(event);
    }
    return false;
}


@Override
public boolean onInterceptTouchEvent(MotionEvent ev)
{

    if (enabled)enter code here
    {
        return super.onInterceptTouchEvent(ev);
    }
    else  // view pager disable scrolling 
    {
        float x = ev.getX();
        switch (ev.getAction())
        {
            case MotionEvent.ACTION_DOWN:
                mStartDragX = x;

                break;
            case MotionEvent.ACTION_MOVE:
                if (mStartDragX < x - 100)//100 value velocity
                {
                    //Left scroll 
                    //return super.onInterceptTouchEvent(ev); 
                }
                else
                    if (mStartDragX > x + 100)
                    {
                        //Right scroll 
                        //return super.onInterceptTouchEvent(ev);
                    }
                break;
        }
    }

    return false;

}


public void setOnSwipeOutListener(OnSwipeOutListener listener)
{
    mListener = listener;
}

public interface OnSwipeOutListener
{

    public void onSwipeOutAtStart();


    public void onSwipeOutAtEnd();
}

}