听滚动事件horizo​​ntalscrollview机器人 [英] listening to scroll events horizontalscrollview android

问题描述

我想听取事件时， Horizo​​ntalScrollView 滚动。试过，但它并没有打印任何东西。

I am trying to listen to the event when the HorizontalScrollView is scrolled. Tried this but it does not print anything.

HorizontalScrollView headerScrollView = new HorizontalScrollView(this);

    headerScrollView.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            Log.i("hv1",event.toString());
            Log.i("hv1","HELLO");
            return false;
        }
    });

实际的问题是，我想滚动两个 Horizo​​ntalScrollView 在time..ie;他们都需要同时滚动时，用于至少一个他们的滚动。 什么解决办法？

The actual problem is, I want to scroll two HorizontalScrollView at a time..ie; both of them need to scroll simultaneously when atleast one of them scrolled. any workaround?

我用下面的答案，然后试图实现这一点，但我不知道我是如何使用的方法的类。

I used the answer below and then tried implementing this but I am not sure how I need to use the methods in the class.

TestHorizontalScrollView headerScrollView = (TestHorizontalScrollView) findViewById(R.id.headerHv); 

这是我需要指向在布局文件中的HSV元素的方式吗？

Is this the way I need to point to the hsv element in the layout file?

推荐答案

您可以尝试创建一个扩展Horizo​​ntalScrollView自己的自定义类并覆盖onScrollChanged（）函数，例如

You may want to try creating your own custom class that extends HorizontalScrollView and overriding the onScrollChanged() function as such

public class TestHorizontalScrollView extends HorizontalScrollView {

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


    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        // TODO Auto-generated method stub
        Log.i("Scrolling", "X from ["+oldl+"] to ["+l+"]");
        super.onScrollChanged(l, t, oldl, oldt);
    }

}

这被覆盖的功能将捕获所有的变化，即使视图没有被触摸滚动位置。这应该让您的滚动视图同步。

This overriden function will catch all changes to the scroll position even when the view is not being touched. This should keep your scroll views in sync.

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