java - 在使用空 while 循环初始化 fragment 之前等待抽屉导航关闭

Question

根据DrawerLayout文档，“避免在动画期间执行昂贵的操作，例如布局，因为它会导致卡顿”。

因此，我尝试等待抽屉关闭后再继续:

@Override public void onItemClick(AdapterView parent
                                , View view
                                , int position
                                , long id) {
    // Close the drawer
    mDrawerLayout.closeDrawer(mDrawerList);

    ExecutorService es = Executors.newSingleThreadExecutor();
    final int mPosition = position;
    Thread navThread = new Thread(new Runnable() {
        @Override public void run() {

            // Wait for the drawer to close
            while (mDrawerLayout.isDrawerOpen(mDrawerList));

            // Initialize the Fragments.
            runOnUiThread(new Runnable() {
                @Override public void run() {
                    selectNavigationItem(mPosition);
                }
            });
        }
    });
    es.submit(navThread);
    es.shutdown();
}

即使它有效，Lint 也会警告我有关空 while 循环的信息。如果没有空的 while 循环，我如何才能实现这种效果？

Answer 1

在 ListView.OnItemClickListener 中:

@Override public void onItemClick(AdapterView parent
                            , View view
                            , int position
                            , long id) {
    mPosition = position;
    mNavigationItemClicked = true;
    mDrawerLayout.closeDrawer(mDrawerList); 
}

在 DrawerLayout 中:

public void onDrawerClosed(View view) {
    getSupportActionBar().setTitle(mTitle);
    if (mNavigationItemClicked)
        selectNavigationItem();
    mNavigationItemClicked = false;
}

在 selectNavigationItem() 中:

switch (mPosition) {
    ...
}