I have the following Activity code:-
public class legislator_info extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_legislator_info);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
toolbar.setTitle("Legislator Info");
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Intent i = getIntent();
String bioguide = i.getExtras().getString("Person");
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// click on 'up' button in the action bar, handle it here
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
So basically I have a fragment which has a list view displayed in it. On click of a list Item I start this activity and I want to go back to the previous fragment on the back button click. I tried the above code but I am not able to travel back. Am pretty new at this any help is appreciated.
I have added my fragment in the following way:-
android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
LegislatorFragment lf = new LegislatorFragment();
ft.replace(R.id.fragment_container,lf);
ft.addToBackStack(null);
ft.commit();
I am still not clear what you want to achieve but you can try this
#Override
public void onBackPressed() {
super.onBackPressed();
finish();
}
EDIT:
case android.R.id.home:
//call onBackPressed here
onBackPressed();
return true;
You have to override onOptionsItemSelected because you are trying with Action bar's back button.
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
}
return super.onOptionsItemSelected(item);
}
Then override BackPressed -
#Override
public void onBackPressed()
{
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
fm.popBackStack();
}
else {
super.onBackPressed();
}
}
Related
I have created a main activity which has a fragment container in it, I am replacing many fragments in it on navigation menu option select. Its working fine, but the problem is:
When I click a navigation item twice, two identical fragments open, i have to press the back button twice to go back.
When all fragments are destroyed after pressing back, I see an empty page (which may be main activity page I guess).
layout_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_activity_page"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/pageBackgroundColor"
tools:context="co.sd.app.MainActivity">
<RelativeLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/side_nav_drawer"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:padding="0sp"
app:menu="#menu/side_navigation_menu" />
</android.support.v4.widget.DrawerLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private Bundle bundle;
private SessionManager session;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarToggle;
private TextView cartItemCountDisplay;
private NavigationView sideNavView;
private Menu sideNavViewMenu;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
drawerLayout = (DrawerLayout) findViewById(R.id.main_activity_page);
actionBarToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.OPEN, R.string.CLOSE);
drawerLayout.addDrawerListener(actionBarToggle);
actionBarToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
bundle = new Bundle();
sideNavView = ((NavigationView) findViewById(R.id.side_nav_drawer));
sideNavViewMenu = sideNavView.getMenu();
//To Display Home Fragment On Page Load
displaySelectedItemResult(sideNavViewMenu.findItem(R.id.nav_home));
//To Adjust Login or Logout option in side navigation menu
if (session.isUserLoggedIn()) {
sideNavViewMenu.findItem(R.id.nav_login).setVisible(false);
sideNavViewMenu.findItem(R.id.nav_logout).setVisible(true);
} else {
sideNavViewMenu.findItem(R.id.nav_login).setVisible(true);
sideNavViewMenu.findItem(R.id.nav_logout).setVisible(false);
}
//Operation on side navigation item click
sideNavView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem item) {
displaySelectedItemResult(item);
//navDrawerLayout.closeDrawers();
return true;
}
});
}
private void displaySelectedItemResult(MenuItem item) {
sideNavViewMenu.findItem(R.id.nav_home).setChecked(false);
sideNavViewMenu.findItem(R.id.nav_contactUs).setChecked(false);
sideNavViewMenu.findItem(R.id.nav_aboutUs).setChecked(false);
sideNavViewMenu.findItem(R.id.nav_login).setChecked(false);
sideNavViewMenu.findItem(R.id.nav_logout).setChecked(false);
Fragment fragment;
switch (item.getItemId()) {
case R.id.nav_user:
if (session.isUserLoggedIn()) {
item.setTitle(session.getUserDetails().get(SessionManager.KEY_NAME));
} else {
item.setTitle("Login First!");
}
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.nav_home:
fragment = new HomeFragment();
if (fragment != null) {
callNavMenuItemsFragment(fragment, "FRAG_HOME");
}
item.setChecked(true);
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.nav_contactUs:
fragment = new ContactUsFragment();
if (fragment != null) {
callNavMenuItemsFragment(fragment, "FRAG_CONTACT_US");
}
item.setChecked(true);
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.nav_aboutUs:
fragment = new AboutUsFragment();
if (fragment != null) {
callNavMenuItemsFragment(fragment, "FRAG_ABOUT_US");
}
item.setChecked(true);
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.nav_login:
new UserAuthentication(MainActivity.this, session).loginAndSignupDialog();
sideNavViewMenu.findItem(R.id.nav_login).setVisible(false);
sideNavViewMenu.findItem(R.id.nav_logout).setVisible(true);
item.setChecked(true);
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.nav_logout:
session.logoutUser();
sideNavViewMenu.findItem(R.id.nav_login).setVisible(true);
sideNavViewMenu.findItem(R.id.nav_logout).setVisible(false);
item.setChecked(true);
drawerLayout.closeDrawer(GravityCompat.START);
break;
default:
}
}
private FragmentTransaction callNavMenuItemsFragment(final Fragment fragment, final String fragmentTag) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.addToBackStack(null);
//if (!ACTIVE_FRAGMENT_ID.equals(String.valueOf(fragment.getId()))) {
if (!activeFragmentIDsList.contains(String.valueOf(fragment.getId()))) {
ft.replace(R.id.fragment_container, fragment, fragmentTag);
activeFragmentIDsList.add(String.valueOf(fragment.getId()));
}
ft.commit();
return ft;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarToggle.onOptionsItemSelected(item)) {
return true;
}
switch (item.getItemId()) {
case android.R.id.home:
finish();
break;
case R.id.cart:
if (session.isUserLoggedIn()) {
startActivity(new Intent(MainActivity.this, CartActivity.class));
} else if (new UserAuthentication(MainActivity.this, session).loginAndSignupDialog()) {
startActivity(new Intent(MainActivity.this, CartActivity.class));
}
break;
default:
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.actionbar_menu, menu);
final MenuItem menuItem = menu.findItem(R.id.cart);
MenuItemCompat.setActionView(menuItem, R.layout.cart_badge_layout);
final View actionView = MenuItemCompat.getActionView(menuItem);
cartItemCountDisplay = actionView.findViewById(R.id.cart_badge);
setupBadge();
actionView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setupBadge();
onOptionsItemSelected(menuItem);
}
});
return super.onCreateOptionsMenu(menu);
}
private void setupBadge() {
int itemCount = (((AppGlobalContent) getApplicationContext()).getSelectedItemsCount());
if (cartItemCountDisplay != null) {
if (itemCount == 0) {
if (cartItemCountDisplay.getVisibility() != View.GONE) {
cartItemCountDisplay.setVisibility(View.GONE);
}
} else {
cartItemCountDisplay.setText(String.valueOf(Math.min(itemCount, 99)));
if (cartItemCountDisplay.getVisibility() != View.VISIBLE) {
cartItemCountDisplay.setVisibility(View.VISIBLE);
}
}
}
}
#Override
public void onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
}
Please suggest me on this.
This will fix your second problem, when you add fragments to your container they will be add to the stack,
if (getSupportFragmentManager().getBackStackEntryCount() == 1) {
finish();
}
else {
super.onBackPressed();
}
so when the stack entry count is 1 you have to finish the activity.
For the first problem you have to use "pop back stack" while adding the same fragment again use : getSupportFragmentManager().popBackStack();
I use MaterialDrawer and code MainActivity is:
public class MainActivity extends AppCompatActivity implements KitchenFragment.CallbackOne {
public static final String TAG = "myLogTag";
private Toolbar mToolbar;
private Drawer drawer;
private FragmentManager fm;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.toolbar);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "CLICK NOCL");
}
});
setSupportActionBar(mToolbar);
// getSupportActionBar().setDisplayHomeAsUpEnabled(false);
fm = getFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.content_frame);
if (fragment == null) {
fragment = MenuFragment.newInstance();
fm.beginTransaction()
.add(R.id.content_frame, fragment)
.commit();
}
drawer = new DrawerBuilder()
.withActivity(this)
.withToolbar(mToolbar)
.withActionBarDrawerToggle(true)
.withHeader(R.layout.drawer_header)
.addDrawerItems(
new PrimaryDrawerItem().withName(R.string.menu).withIdentifier(1),
new PrimaryDrawerItem().withName(R.string.kitchen_title).withIdentifier(2),
new PrimaryDrawerItem().withName(R.string.information_title).withEnabled(false)
).withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
#Override
public boolean onItemClick(View view, int position, IDrawerItem drawerItem) {
Log.d(TAG, "position clicked: " + position);
Fragment fragment = MenuFragment.newInstance();
switch (position) {
case 1:
fragment = MenuFragment.newInstance();
break;
case 2:
fragment = KitchenFragment.newInstance();
break;
default:
fragment = new Fragment();
}
fm.beginTransaction().replace(R.id.content_frame, fragment).commit();
return false;
}
})
.withFireOnInitialOnClick(true)
.withSavedInstance(savedInstanceState)
.withOnDrawerNavigationListener(new Drawer.OnDrawerNavigationListener() {
#Override
public boolean onNavigationClickListener(View view) {
Log.d(TAG, "CLICK in DNL");
if (!drawer.getActionBarDrawerToggle().isDrawerIndicatorEnabled()) {
onBackPressed();
return true;
} else
return false;
}
})
.build();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
Log.d(TAG, "CLICK OIS");
switch (item.getItemId()) {
case R.id.action_settings:
return true;
case android.R.id.home:
getFragmentManager().popBackStackImmediate();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
outState = drawer.saveInstanceState(outState);
super.onSaveInstanceState(outState);
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen())
drawer.closeDrawer();
else if (getFragmentManager().getBackStackEntryCount() == 1) {
getSupportActionBar().setDisplayHomeAsUpEnabled(false);
drawer.getActionBarDrawerToggle().syncState();
getFragmentManager().popBackStack();
} else if (getFragmentManager().getBackStackEntryCount() > 0)
getFragmentManager().popBackStack();
else
super.onBackPressed();
}
#Override
public void setFirstSelected() {
drawer.setSelection(1);
}
}
I'm trying to trace a Click in mToolbar.setNavigationOnClickListener
and withOnDrawerNavigationListener and onOptionsItemSelected.
None of the listeners not reacted for clicking.
How you see i use Activity that launches Fragment (1), which in turn lets Fragment (2 and 3). In 2 and 3 Fragment in OnCreate i use ((AppCompatActivity)getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true); , and I need to by pressing the back button (in toolbar), returning the previous fragment, and not open Drawer
The MaterialDrawer already handles all the listeners for you. If you need to do an action after the drawer opens or closes you can provide the listener via the DrawerBuilder
For the icon you have this listener:
OnDrawerNavigationListener
https://github.com/mikepenz/MaterialDrawer/blob/develop/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java#L1158
For drawer close / open this listener:
OnDrawerListener
https://github.com/mikepenz/MaterialDrawer/blob/develop/library/src/main/java/com/mikepenz/materialdrawer/DrawerBuilder.java#L1116
I suggest you to create new Activity using android studio wizard. File->New->Activity->Navigation Drawer Activity.
In that case ActionBarDrawerToaggle is used
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
This toggle contains click listener which handle open/close drawer functionality for you.
Also you can that item clicks implemented through OnNavigationItemSelectedListener.onNavigationItemSelected(MenuItem item)
I am using DrawerArrowDrawable to animate the hamburger icon during the opening and closing of Navigation drawer. Following is the code snippet I used for that:
DrawerArrowDrawable drawerArrow = new DrawerArrowDrawable(this);
toolbar.setNavigationIcon(drawerArrow)
mDrawerToggle.syncState();
Now when I open a fragment I use actionBar.setHomeAsUpIndicator(R.drawable.back_icon); & actionBar.setDisplayHomeAsUpEnabled(true); in that very fragment, to change the navigation icon as a back icon. The icon changes but the functionality of that button stays same i.e., it opens the navigation drawer, but I want to go back to the previous fragment (by using popBackStack).
I tried to override onOptionsItemSelected :
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
fm.popBackStack();
}
break;
}
}
But the control never reaches in the above block when I press the navigation icon.
If I get to know that How to intercept the click event of DrawerArrowDrawable? I would be able to run popBackStack and do what I want to do.
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
FragmentManager fm = getSupportFragmentManager();
if (fm.getBackStackEntryCount() > 0) {
fm.popBackStack();
}
}
});
Add this listener inside the Navigation Drawer Activity:
private FragmentManager.OnBackStackChangedListener mOnBackStackChangedListener = new FragmentManager.OnBackStackChangedListener() {
#Override
public void onBackStackChanged() {
setActionBarArrowDependingOnFragmentsBackStack();
}
};
Then create this method:
public void setActionBarArrowDependingOnFragmentsBackStack() {
int backStackEntryCount = getFragmentManager().getBackStackEntryCount();
mDrawerToggle.setDrawerIndicatorEnabled(backStackEntryCount == 0);
}
Now override these methods:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.isDrawerIndicatorEnabled() && mDrawerToggle.onOptionsItemSelected(item)) {
return true;
} else if (item.getItemId() == android.R.id.home && getFragmentManager().popBackStackImmediate()) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
return super.onCreateOptionsMenu(menu);
}
#Override
public void onDestroy() {
super.onDestroy();
getFragmentManager().removeOnBackStackChangedListener(mOnBackStackChangedListener);
}
Finally add this line inside your onCreate() method:
getFragmentManager().addOnBackStackChangedListener(mOnBackStackChangedListener);
I have problem with the back button in action bar to fragment
my code fragment:
public class Server extends Fragment {
View view;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.activity_server, container, false);
Button server = (Button) view.findViewById(R.id.status);
/** Button Check Status Server **/
server.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
Intent myIntent = new Intent(view.getContext(), ServerStatus.class);
startActivityForResult(myIntent, 0);
getActivity().finish();
}
});
return view;
}
}
my code in activity:
public class ServerStatus extends ActionBarActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_server_status);
}
}
My code in Fragment
#Override
public void onNavigationDrawerItemSelected(int position) {
Fragment objFragment = null;
switch (position) {
case 0:
objFragment = new Account();
break;
case 1:
objFragment = new AllNews();
break;
case 2:
objFragment = new Server();
break;
case 3:
objFragment = new Account();
break;
case 4:
objFragment = new Account();
break;
case 5:
objFragment = new Account();
break;
case 6:
objFragment = new About();
break;
}
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container,objFragment)
.commit();
}
Every time I click the back button, the program always closes. I already tried to use:
getActionBar().setDisplayHomeAsUpEnabled(true);
and this:
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
Can anyone help me to fix my program?
EDIT: Concerning cross-activity-navigation, you should not use startActivityForResult() in that way. Try to use startActivity() instead. If you start an activity for a result, the calling activity waits for the onActivityResult() callback and should not be finished.
In the manifest file you should declare the fragment's activity as parent activity of ServerStatus to enable back navigation. You should not need NavUtils.
If you want to enable fragment navigation within an activity, you have to add your fragment transactions to the backstack:
getFragmentManager().beginTransaction().addToBackStack(null).replace(...).commit();
Then you have to call getFragmentManager().popBackStack() in onOptionsItemSelected() to enable back navigation for the action bar:
#override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
getFragmentManager().popBackStack();
return true;
}
return super.onOptionsItemSelected(item);
}
You may have to override onBackPressed() to enable back navigation for the back button:
#override
public void onBackPressed() {
if (getFragmentManager().getBackStackEntryCount() >= 1) {
getFragmentManager().popBackStack(); // return to previous fragment
}
else {
super.onBackPressed(); // Exit application when no fragment is on the backstack
}
}
I'm using this tutorial to implement facebook login etc.
Facebook Login
I have added new fragment in this to show list of friends. Now when I press back button on my newly added fragment it takes me to the SPLASH fragment, I want same behaviour on back button on action bar. Means when I'm on my new fragment it shows me a back button on action bar. And pressing that back button takes me back to the SPLASH screen.
private void showFragment(int fragmentIndex, boolean addToBackStack) {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
for (int i = 0; i < fragments.length; i++) {
if (i == fragmentIndex) {
transaction.show(fragments[i]);
} else {
transaction.hide(fragments[i]);
}
}
if (addToBackStack) {
transaction.addToBackStack(null);
}
transaction.commit();
}
You can do that by two ways :
1. Inside your fragment
#Override
public void onDetach()
{
super.onDetach();
PUT YOUR CODE HERE
}
This will called when fragment will be finished.
2. Just add addToBackStack while you are transitioning between your fragments like below:
fragmentManager.beginTransaction().replace(R.id.content_frame,fragment).addToBackStack("tag").commit();
if you write addToBackStack(null) , it will handle it by itself but if you give a tag , you should handle it manually.
EDITED:
for doing transactions
FragmentTransaction fragmentTransaction = getActivity().getSupportFragmentManager().beginTransaction();
Fragment scheduleFragment = new ScheduleFragment();
fragmentTransaction.replace(R.id.content_container, scheduleFragment, "scheduleFragment");
fragmentTransaction.addToBackStack("scheduleFragment");
fragmentTransaction.commit();
#Yawar actionbar is on activity only and this will added on activity it will be called evertime when u press actionbar home button-->
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// app icon in action bar clicked; goto parent activity.
this.finish();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
i got this code on stackoverflow after searching hard hope this may help you
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);// in on Create()
search for code onOptionsItemSelected(MenuItem item)
and edit it in this way
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// change your behaviour here
Intent intent = new Intent(this, yourclass.class);// i started new activity here
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}