带有SlidingTabLayout的ViewPager中的Listview - 高度问题

Question

我有一个片段,我用TabLayout托管了一个ViewPager,ViewPager的内容是一个包含ListView的片段.

我知道我的ViewPager无法使用wrap_content,开始时的高度没有计算.

所以我这样做了:

 @Override
    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        boolean wrapHeight = MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST;

        final View tab = getChildAt(0);
        if (tab == null) {
            return;
        }

        int width = getMeasuredWidth();
        if (wrapHeight) {
            // Keep the current measured width.
            widthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
        }
        Fragment fragment = ((Fragment) getAdapter().instantiateItem(this, getCurrentItem()));
        heightMeasureSpec = getMeasureExactly(fragment.getView(), widthMeasureSpec);

        //Log.i(Constants.TAG, "item :" + getCurrentItem() + "|height" + heightMeasureSpec);
        // super has to be called again so the new specs are treated as
        // exact measurements.
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    int getMeasureExactly(View child, int widthMeasureSpec) {
        child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        int height = calculateHeight ((ListView)child.findViewById(R.id.list)); //getMeasuredHeight();

        System.out.println("Height is: "+height);
        return MeasureSpec.makeMeasureSpec(height , MeasureSpec.EXACTLY);
    }


    private int calculateHeight(ListView list) {

        int height = 0;

        for (int i = 0; i <10; i++) {
            View childView = list.getAdapter().getView(i, null, list);
            childView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            height+= childView.getMeasuredHeight();
        }

        //dividers height
      //  height += list.getDividerHeight() * 11; //list.getCount();

        return height;

    }

我得到一个包含10行的List来填充,但只有9个可见,一个移出视图.

这里的问题是如何精确测量列表行高度并将其添加到10个项目中.

这个问题一直困扰着stackoverflow,但似乎没有具体的解决方案.特别是对于ListView孩子.因为我可以使用TableLayout.

我也知道这样做的记忆和滚动因素,但这是设计的,我无能为力.

上面代码的要点是传递一行列表的高度,然后乘以10(因为我只需要列表中的10行+分隔符高度)

Answer 1

在 XML 文件中，放入列表视图选项

android:layout_weight="0.92"