吐血经验 ActionBar ActionView （解决点击按钮不Expand的问题）

 
@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.actionbar, menu);
        MenuItem searchItem = menu.findItem(R.id.action_search);
        MenuItemCompat.setOnActionExpandListener(searchItem, new MenuItemCompat.OnActionExpandListener() {
            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                Toast.makeText(MainActivity.this,"Expand",Toast.LENGTH_LONG);
                return true;
            }
            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                Toast.makeText(MainActivity.this,"Collapse",Toast.LENGTH_LONG);
                return true;
            }
        });
            return super.onCreateOptionsMenu(menu);
    }@Override
    public boolean onCreateOptio