如何拦截ViewPager.OnPageChangeListener中的触摸事件

Question

I'm trying to disallow my ViewPager from scrolling between tabs. I have the following situation:

        public class MyClass extends ViewPager implements ViewPager.OnPageChangeListener, OnTouchListener {

             public MyClass() {
               setOnTouchListener(this);
             }

@Override
    public void onPageScrollStateChanged(int state) {
        Log.d("Testing", TAG + " onPageScrollStateChanged");
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        Log.d("Testing", TAG + " onPageScrolled");
    }

    @Override
    public void onPageSelected(int position) {
        Log.d("Testing", TAG + " onPageSelected");
    }

        @Override
        public boolean onInterceptTouchEvent(MotionEvent event) {
            Log.d("Testing", "intercept");
                return false;
        }

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                Log.d("Testing", "touch2");
                    return false;
            }

        }

I have the logs from onPageScrolled and onPageScrollStateChanged normally, but I do not have logs from onInterceptTouchEvent and onTouch. What am I doing wrong?

Answer 1

This is how I handle this (my entire class) :

public class SelectiveViewPager extends ViewPager {
private boolean paging = true;

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

public SelectiveViewPager(Context context, AttributeSet attributeSet){
    super(context, attributeSet);
}

@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
    if (paging) {
        return super.onInterceptTouchEvent(e);
    }

    return false;
}

public void setPaging(boolean p){ paging = p; }

}

The boolean paging gives you the option to turn this on and off, if you need it. If you don't need, just return false . If you aren't doing anything special in onTouch , you don't need to override it.

Answer 2

return true; in your onInterceptTouchEvent();

Answer 3

Your constructor doesn't get called btw. Are you creating the view pager by code or inflating it by xml? You need to define the proper constructors.