ScrollView嵌套listview高度适应

1、当listview的item的高度固定时候，自定义ListView，计算高度

自定义listview

public class MyListView extends ListView {
    public boolean isOnMeasure = false;

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

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

    public MyListView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> ,
                MeasureSpec.AT_MOST);
        isOnMeasure = true;
        super.onMeasure(widthMeasureSpec, expandSpec);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        isOnMeasure = false;
        super.onLayout(changed, l, t, r, b);
    }
}
           

使用：

<com.jumploo.mainPro.ui.home.MyListView
      android:id="@+id/view_hot_article"
      android:layout_width="match_parent"
      android:layout_height="match_parent">
</com.jumploo.mainPro.ui.home.MyListView>
           

2、在使用listview中，当listview中item高度不固定时候，则需要计算item高度

在adapter设置数据之后再调用一下方法，因为getview()方法之后，才知道具体高度

public void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        if (listAdapter == null) {
            // pre-condition
            return;
        }
        int totalHeight = ;
        View view;
        for (int i = ; i < listAdapter.getCount(); i++) {
            view = listAdapter.getView(i, null, listView);
            //宽度为屏幕宽度
            int i1 = View.MeasureSpec.makeMeasureSpec(getScreenWidth(mContext),
                    View.MeasureSpec.EXACTLY);
            //根据屏幕宽度计算高度
            int i2 = View.MeasureSpec.makeMeasureSpec(i1, View.MeasureSpec.UNSPECIFIED);
            view.measure(i1, i2);
            totalHeight += view.getMeasuredHeight();
        }
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - ));
        listView.setLayoutParams(params);
    }

    public int getScreenWidth(Context context) {
        WindowManager manager = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        Display display = manager.getDefaultDisplay();
        return display.getWidth();
    }