不会调用onOptionsItemSelected [英] onOptionsItemSelected isn't being called
本文介绍了不会调用onOptionsItemSelected的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在我的片段上调用了
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Toast.makeText(getActivity(), "otem: " + item.getItemId(), Toast.LENGTH_SHORT).show();
switch (item.getItemId()) {
case android.R.id.home:
getFragmentManager().popBackStack();
((ActionBarActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(false);
return true;
}
return super.onOptionsItemSelected(item);
}
上面的代码试图做的是实际上是在单击操作栏上的后退按钮(主页按钮)时转到上一个意图，而不是显示导航抽屉.但是似乎片段中onOptionsItemSelected内部的所有内容都没有执行.(因为是这样，它将显示一个吐司.我也在那儿放置了换行符)为什么?
What the code above tries to do is to actually go to the previous intent when the back button (home button) at the actionbar is being clicked, instead of displaying the navigation drawer. But it seems everything inside the onOptionsItemSelected in the fragment isn't being executed. (Because if it is, it would display a toast.. I also put a linebreak there) Why?
MainActivity.java
MainActivity.java
public class MainActivity extends ActionBarActivity
implements NavigationDrawerFragment.NavigationDrawerCallbacks {
private NavigationDrawerFragment mNavigationDrawerFragment;
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
if (intent.getStringExtra("intentCaller").equals("expensesRecurring")){
Bundle bundle = new Bundle();
bundle.putString("tab", "1");
Fragment fragment = new MenuExpenses();
fragment.setArguments(bundle);
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, fragment, "fragmentExpenses")
.commit();
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
if (toolbar != null) {
setSupportActionBar(toolbar);
}
mNavigationDrawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
}
@Override
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
.commit();
}
public void onSectionAttached(int number) {
switch (number) {
case 0:
mTitle = getString(R.string.menu_home);
break;
case 1:
mTitle = getString(R.string.menu_analyze);
break;
case 2:
mTitle = getString(R.string.menu_expenses);
break;
case 3:
mTitle = getString(R.string.menu_income);
break;
}
}
public void restoreActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setTitle(mTitle);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowHomeEnabled(true);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
// Only show items in the action bar relevant to this screen
// if the drawer is not showing. Otherwise, let the drawer
// decide what to show in the action bar.
//getMenuInflater().inflate(R.menu.main, menu);
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
/*
if (id == R.id.action_settings) {
return true;
}*/
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
//((MainActivity) activity).onSectionAttached(getArguments().getInt(ARG_SECTION_NUMBER));
}
}
@Override
public void onBackPressed() {
int fragments = getFragmentManager().getBackStackEntryCount();
if (fragments == 1) {
// make layout invisible since last fragment will be removed
}
super.onBackPressed();
}
NavigationDrawerFragment.java
NavigationDrawerFragment.java
public class NavigationDrawerFragment extends Fragment {
private NavigationDrawerCallbacks mCallbacks;
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private ListView mDrawerListView;
private View mFragmentContainerView;
private int mCurrentSelectedPosition = 1;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
public NavigationDrawerFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Retain this fragment across configuration changes - added to make sure data in fragment retains after orientation changes
setRetainInstance(true);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
mFromSavedInstanceState = true;
}
// Select either the default item (0) or the last selected item.
selectItem(mCurrentSelectedPosition);
}
@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);
mDrawerListView.setAdapter(new ArrayAdapter<String>(
((ActionBarActivity) getActivity()).getSupportActionBar().getThemedContext(),
android.R.layout.simple_list_item_activated_1,
android.R.id.text1,
new String[]{
getString(R.string.menu_home),
getString(R.string.menu_analyze),
getString(R.string.menu_expenses),
getString(R.string.menu_income),
getString(R.string.menu_moneyJar),
getString(R.string.menu_goal),
getString(R.string.menu_report),
getString(R.string.menu_settings),
}));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerListView = (ListView) inflater.inflate(
R.layout.fragment_navigation_drawer, container, false);
mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectItem(position);
}
});
mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
ViewGroup mTop = (ViewGroup)inflater.inflate(R.layout.drawer_header, mDrawerListView, false);
mDrawerListView.addHeaderView(mTop, null, false);
return mDrawerListView;
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
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 = ((ActionBarActivity) getActivity()).getSupportActionBar();
//actionBar.setHomeButtonEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
//actionBar.setDisplayShowHomeEnabled(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.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()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
private void selectItem(int position) {
mCurrentSelectedPosition = position;
if (mDrawerListView != null) {
mDrawerListView.setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
if (mCallbacks != null) {
mCallbacks.onNavigationDrawerItemSelected(position);
}
Fragment fragment = null;
FragmentTransaction transaction = getFragmentManager().beginTransaction();
switch (position) {
case 1:
fragment = new MenuHome();
transaction.replace(R.id.container, fragment, "fragmentHome");
transaction.addToBackStack(null);
transaction.commit();
break;
case 2:
fragment = new MenuAnalyze();
transaction.replace(R.id.container, fragment, "fragmentAnalyze");
transaction.addToBackStack(null);
transaction.commit();
break;
case 3:
fragment = new MenuExpensesDaily();
transaction.replace(R.id.container, fragment, "fragmentExpenses");
transaction.addToBackStack(null);
transaction.commit();
break;
default:
break;
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallbacks = (NavigationDrawerCallbacks) activity;
} catch (ClassCastException e) {
throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
}
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = null;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (mDrawerLayout != null && isDrawerOpen()) {
inflater.inflate(R.menu.global, menu);
showGlobalContextActionBar();
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
private void showGlobalContextActionBar() {
ActionBar actionBar = ((ActionBarActivity) getActivity()).getSupportActionBar();
actionBar.setTitle(R.string.app_name);
}
MenuExpensesAdd.java(这里的问题是未调用其onOptionsItemSelected)
MenuExpensesAdd.java (herein lies the problem where its onOptionsItemSelected isn't being called)
public class MenuExpensesAdd extends Fragment{
public static MenuExpensesAdd newInstance(int year, int month) {
MenuExpensesAdd frag = new MenuExpensesAdd();
Bundle args = new Bundle();
args.putInt("year", year);
args.putInt("month", month);
frag.setArguments(args);
return frag;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setHasOptionsMenu(true);
setRetainInstance(true);
initYear = getArguments().getInt("year");
initMonth = getArguments().getInt("month");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View root = inflater.inflate(R.layout.expenses_add, container, false);
TextView tbTvTitle = (TextView) getActivity().findViewById(R.id.tbTvTitle);
tbTvTitle.setVisibility(View.VISIBLE);
tbTvTitle.setText("Add New Expenses");
tbIbSave = (ImageButton) getActivity().findViewById(R.id.tbIbSave);
tbIbSave.setVisibility(View.VISIBLE);
Spinner tbSpnMonth = (Spinner) getActivity().findViewById(R.id.tbSpnMonth);
tbSpnMonth.setVisibility(View.GONE);
Spinner tbSpnYear = (Spinner) getActivity().findViewById(R.id.tbSpnYear);
tbSpnYear.setVisibility(View.GONE);
/* some more codes */
return root;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
{
super.onCreateOptionsMenu(menu, inflater);
android.support.v7.app.ActionBar actionBar = ((ActionBarActivity)getActivity()).getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(false);
actionBar.setDisplayShowTitleEnabled(false);
}
@Override
public void onPrepareOptionsMenu (Menu menu)
{
super.onPrepareOptionsMenu(menu);
android.support.v7.app.ActionBar actionBar = ((ActionBarActivity)getActivity()).getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowTitleEnabled(false);
//fragment specific menu creation
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
Toast.makeText(getActivity(), "otem: " + item.getItemId(), Toast.LENGTH_SHORT).show();
switch (item.getItemId()) {
case android.R.id.home:
getFragmentManager().popBackStack();
((ActionBarActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(false);
return true;
}
return super.onOptionsItemSelected(item);
}
推荐答案
您是否在 onCreate()中调用 this.setHasOptionsMenu(true); ?
报告此片段希望通过接收对onCreateOptionsMenu(Menu，MenuInflater)和相关方法的调用来参与填充选项菜单.
Report that this fragment would like to participate in populating the options menu by receiving a call to onCreateOptionsMenu(Menu, MenuInflater) and related methods.
文档: http://developer.android.com/reference/android/app/Fragment.html#setHasOptionsMenu(boolean)
更多阅读内容:: http://developer.android.com/guide/components/fragments.html#ActionBar
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