我使用导航抽屉,其中一个片段我有不同的菜单。对于导航抽屉打开时的片段,如何隐藏操作栏的按钮? 例如,在图片(http://prntscr.com/7ur712)上,它是按钮REFRESH。
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
**setHasOptionsMenu(true);** }
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
**inflater.inflate(R.menu.my_menu, menu);**
}
答案 0 :(得分:1)
实施 ActionBarDrawerToogle 以获取导航抽屉的状态。调用invalidateOptionsMenu();
使导航抽屉的打开/关闭状态下的菜单无效。
稍后根据状态,您可以使用以下方式显示/隐藏导航项目:
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// inflate menu from xml
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.settings, menu);
if (mState == MENU_HIDDEN)
{
for (int i = 0; i < menu.size(); i++)
menu.getItem(i).setVisible(false);
}
}
答案 1 :(得分:0)
更新actionBar按钮的最佳方法是在invalidateOptionsMenu()
打开/关闭时调用NavigationDrawer
。
根据Android培训文档页面,当您创建ActionBarDrawerToggle
时,您应该覆盖onDrawerClosed
和onDrawerOpened
方法:
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
此外,在您的onPrepareOptionsMenu
方法中,您可以检测抽屉是否打开,并加载与抽屉状态相对应的菜单:
/* Called whenever we call invalidateOptionsMenu() */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// If the nav drawer is open, hide action items related to the content view
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
有关详细信息,请在此处查看Android开发者文档:https://developer.android.com/training/implementing-navigation/nav-drawer.html (参见:收听开放和关闭事件)