ObservableHorizontalScrollView.java

package net.basilwang.ui.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.HorizontalScrollView;

public class ObservableHorizontalScrollView extends HorizontalScrollView {
	private HorizontalScrollViewListener horizontalScrollViewListener = null;

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

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

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

    public void setHorizontalScrollViewListener(HorizontalScrollViewListener horizontalScrollViewListener) {
        this.horizontalScrollViewListener = horizontalScrollViewListener;
    }

    @Override
    protected void onScrollChanged(int x, int y, int oldx, int oldy) {
        super.onScrollChanged(x, y, oldx, oldy);
        if(horizontalScrollViewListener != null) {
        	horizontalScrollViewListener.onScrollChanged(this, x, y, oldx, oldy);
        }
    }

}