使用SearchView时如何叠加活动内容？

Question

点按“搜索”图标后，我希望SearchView小部件展开，并掩盖其下方的内容。收件箱通过在其上方覆盖不透明的灰色来屏蔽当前内容。我该怎么做同样的事情？我正在使用SearchView小部件。

Answer 1

我通过在展开搜索视图时切换到另一个片段来实现它，并在折叠时切换回来。代码看起来像这样：

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.main, menu);

    //Setup the search widget
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    MenuItem menuItem = menu.findItem(R.id.action_search);
    SearchView mSearchView = (SearchView) menuItem.getActionView();

    //Not sure if you need this line for the searchView to be expandable
    mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

    mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
            //Update contents of the fragment
        }

        @Override
        public boolean onQueryTextChange(String s) {
            //Update contents of the fragment
        }
    });

    MenuItemCompat.setOnActionExpandListener(menuItem,
            new MenuItemCompat.OnActionExpandListener() {
                @Override
                public boolean onMenuItemActionExpand(MenuItem item) {
                    //Switch to search fragment
                }

                @Override
                public boolean onMenuItemActionCollapse(MenuItem item) {
                    //Switch back to previous fragment
                }
            })
    ;

    return super.onCreateOptionsMenu(menu);
}