mylhyl/android-pagestatelayout

android page state toggle 界面加载状态切换

android-pagestatelayout's Issues

当指定的contentId布局宽高有权重或者是约束布局的子View的时候宽高显示不正常。

项目中类似recyclerView或者listView和ScrollView需要状态的情况也不在少数，测试发现
在activity中直接pageState = StatusLayout.wrap(this,R.id.id_of_scroll_view)类似这样的代码，在scrollView设置了权重的情况下，并不能加载scrollview正确的宽高。

原理很简单，原View被加载到了自定义View，自定义View获取了它的lp，但是原View的宽高这时候不应该都是MATCH_PARENT吗？

我懒得copy和paste，直接反射写了段。

    public static PageState wrap(Activity activity, @IdRes int contentId) {
        ViewGroup actContent = activity.findViewById(android.R.id.content);
        ViewGroup rootLayout = (ViewGroup) (actContent).getChildAt(0);
        View contentLayout = rootLayout.findViewById(contentId);
        if (contentLayout == null) {
            throw new RuntimeException("contentLayout can not be null");
        }
        ViewGroup.LayoutParams lp = contentLayout.getLayoutParams();
        ViewGroup parent = (ViewGroup) contentLayout.getParent();
        if (parent == null) {
            throw new RuntimeException("parent of the contentLayout can not be null");
        }
        int contentViewIndex = parent.indexOfChild(contentLayout);

        // 移除子View
        parent.removeView(contentLayout);

        // 添加statusView
        PageStateLayout statusLayout = new PageStateLayout(parent.getContext());
        parent.addView(statusLayout, contentViewIndex,lp);
        // statusView添加子View
        statusLayout.addView(contentLayout);

        // 设置宽高
        contentLayout.getLayoutParams().width = ViewGroup.LayoutParams.MATCH_PARENT;
        contentLayout.getLayoutParams().height = ViewGroup.LayoutParams.MATCH_PARENT;
        
        // 反射调用setContentView方法，将contentLayout设置为statusLayout的contentLayout
        Class<?> temp = statusLayout.getClass();
        Field f;
        try {
            f = temp.getDeclaredField("mPageStateCreator");
            f.setAccessible(true);
            Method get = f.get(statusLayout).getClass().getDeclaredMethod("setContentView", View.class);
            get.setAccessible(true);
            get.invoke(f.get(statusLayout),contentLayout);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return statusLayout;
    }