像你一样面临同样的问题......(我已经从片段中删除了导航视图)。这个解决方案对我有用。您可以尝试不从片段中删除导航视图。
试试这个结构:
public your class
{
private int mNavItemId;
private static final String NAV_ITEM_ID = "navItemId";
onCreate()
{
if (null == savedInstanceState) {
mNavItemId = R.id.home;
} else {
mNavItemId = savedInstanceState.getInt(NAV_ITEM_ID);
}
//call setupnavigationview
setupnavigationview();
}
private void setupNavigationView() {
mNavigationView = (NavigationView) findViewById(R.id.navigation_view);
mNavigationView.getMenu().findItem(mNavItemId).setChecked(true);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
// update highlighted item in the navigation menu
menuItem.setChecked(true);
mNavItemId = menuItem.getItemId();
mDrawerLayout.closeDrawer(GravityCompat.START);
switch (menuItem.getItemId()) {
case R.id.id_of_your_menu_item:
call your fragment
break;
});
}
@Override
protected void onSaveInstanceState(final Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(NAV_ITEM_ID, mNavItemId);
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
if (item.getItemId() == android.support.v7.appcompat.R.id.home) {
return mDrawerToggle.onOptionsItemSelected(item);
}
return super.onOptionsItemSelected(item);
}
}