同步 ViewPager 中的所有 ListView [英] Synchronize all the ListView in a ViewPager

问题描述

在我的应用程序中，我有一个 ViewPager，其中每个都有一个自定义 ListView，它像表格中的行一样链接在一起.问题是，当我在第一页滚动 ListView 然后滚动 ViewPager 时，第一页的 ListView 和第二页的 ListView 未对齐.listView 必须对齐，因为在第一个中我有一个带有描述的 TextView，然后是 4 个带有数据的列，而在接下来的 ListViews 中，有 6 个没有描述的列，所以如果它们未对齐，那将非常复杂.那么如何一次滚动所有的 listView 呢??

In my application I have a ViewPager with each one a custom ListView in it linked toghether like row in a table. The problem is that when I scroll a ListView in the first page and then I scroll the ViewPager the ListView of the first page and the ListView of the second page are misaligned. The listView must be aligned because in the first one i have a TextView with a description and then 4 coloumns with datas and in the next ListViews 6 coloumns without the description so if they are misaligned it's very complicated. So how can I scroll all the listViews at once ??

非常感谢 Rahul Parsani...我终于设法做到了...如果您在单独的片段中有 listView 并且片段的数量未定义，这就是答案:

Thank you very much to Rahul Parsani... I've finally managed how to do this... If you have the listView in separate fragment and the number of the fragment is undefined this is the answer:

final ArrayList<ListView> lvs = new ArrayList<ListView>();
        for (int j = 0; j < adapter.getCount(); j++) {
            YourFragment fragJ = (YourFragment) adapter.getItem(j);
            final ListView listViewJ = fragJ.lv;
            lvs.add(listViewJ);
        }

        for (int j = 0; j < lvs.size(); j++) {
            final int x = j;
            lvs.get(j).setOnTouchListener(new OnTouchListener() {

                boolean dispatched = false;
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    if (!dispatched) {
                        dispatched = true;
                        if (x != 0) {
                            lvs.get(x - 1).dispatchTouchEvent(event);
                        };
                        if (x != lvs.size() - 1) {
                            lvs.get(x + 1).dispatchTouchEvent(event);
                        }

                    }
                    dispatched = false;
                    return false;
                }
            });
        }

推荐答案

您要做的是同步列表视图.here 有一个库已经为两个列表视图实现了此功能.我将尝试解释位于活动中与您相关的源代码部分 这里.

What you are trying to do is synchronize the listviews. There is a library that already implements this for two listviews here. I will try to explain the part of the source code relevant to you which is located in the activity here.

假设您是否可以通过变量访问所有列表视图:

Suppose if you have access to all your listviews through variables:

listViewOne = (ListView) findViewById(R.id.list_view_one);
listViewTwo = (ListView) findViewById(R.id.list_view_two);
listViewThree = (ListView) findViewById(R.id.list_view_three);
listViewFour = (ListView) findViewById(R.id.list_view_four);

在它们上设置相同的触摸监听器:

Set the same touch listeners on them:

listViewOne.setOnTouchListener(touchListener);
listViewTwo.setOnTouchListener(touchListener);
// similarly for listViewThree & listViewFour

触摸监听器的基本思想是将事件分派给其他视图，以便它们也与被触摸的列表视图同步滚动.

The basic idea of the touch listener is to dispatch events to the other views so that they also scroll synchronously with the listview being touched.

// Passing the touch event to the opposite list
OnTouchListener touchListener = new OnTouchListener() {                                        
    boolean dispatched = false;

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (v.equals(listViewOne) && !dispatched) {
            dispatched = true;
            listViewTwo.dispatchTouchEvent(event);
            listViewThree.dispatchTouchEvent(event);
            listViewFour.dispatchTouchEvent(event);
        } else if (v.equals(listViewTwo) && !dispatched) {
            dispatched = true;
            listViewOne.dispatchTouchEvent(event);
            listViewThree.dispatchTouchEvent(event);
            listViewFour.dispatchTouchEvent(event);
         } // similarly for listViewThree & listViewFour 
         dispatched = false;
         return false;
    }
};

该库还设置了一个滚动侦听器，我相信它已被使用，因为视图可能具有不同的高度，而您没有.尝试让我知道这是否有效.

The library also has set a scroll listener, which I believe is used because the views may be of differing heights, which you don't have. Try and let me know if this works.

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