汉堡图标不会在导航抽屉片段展示 [英] Hamburger Icon does not show in Navigation Drawer Fragment
问题描述
我使用的是Fragement导航抽屉,因此不能使用onPostCreated调用syncState
I am using a Fragement for navigation drawer and hence cant use onPostCreated to call syncState
public class NavigationDrawerFragment extends Fragment{
....
调用syncState()上avctivityCreated
Calling syncState() on avctivityCreated
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Indicate that this fragment would like to influence the set of actions in the action bar.
setHasOptionsMenu(true);
mDrawerToggle.syncState();
}
使用ic_drawer的图标
Using the ic_drawer for icon
public void setUp(int fragmentId, DrawerLayout drawerLayout) {
mFragmentContainerView = getActivity().findViewById(fragmentId);
mDrawerLayout = drawerLayout;
// set a custom shadow that overlays the main content when the drawer opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
// set up the drawer's list view with items and click listener
ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the navigation drawer and the action bar app icon.
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(), /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
R.string.navigation_drawer_open, /* "open drawer" description for accessibility */
R.string.navigation_drawer_close /* "close drawer" description for accessibility */
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
// The user manually opened the drawer; store this flag to prevent auto-showing
// the navigation drawer automatically in the future.
mUserLearnedDrawer = true;
SharedPreferences sp = PreferenceManager
.getDefaultSharedPreferences(getActivity());
sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
无法弄清楚什么是错的。 请帮忙
Can't figure out what is wrong. Please help
推荐答案
我有这个问题为好。对我来说,进口 android.support.v7.app.ActionBarDrawerToggle
而不是 android.support.v4.app.ActionBarDrawerToggle
固定它。您还可以在定义mDrawerToggle删除 R.drawable.ic_drawer
参数:
I had this problem as well. For me, importing android.support.v7.app.ActionBarDrawerToggle
instead of android.support.v4.app.ActionBarDrawerToggle
fixed it. You also have to remove the R.drawable.ic_drawer
argument when you define mDrawerToggle:
mDrawerToggle =新ActionBarDrawerToggle(
getActivity(),
mDrawerLayout,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
)
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(),
mDrawerLayout,
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
)
如果还是不行,请尝试一些答案为<一个href="http://stackoverflow.com/questions/26754940/appcompatv7-v21-navigation-drawer-not-showing-hamburger-icon">this问题。
If that doesn't work, try some of the answers to this question.
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