Develop Reference

Android - One activity multiple fragments for tabs screen

I want to create an app. First page is a login page, then second page is a tabbad screen. I use BottomNavigationView to create a tab bar.
I want to give toolbar to each page. So, I put a Toolbar in fragment's layout.
But I have some problems:
If I add bottom navigation view to activity, I cannot use any transition animation from login to tab bar page.
If I add bottom navigation view to fragment and replace fragment by using childFragmentManager when bottom navigation view item is selected, childFragmentManager doesn't hide parent fragment's toolbar.
For second case, parent Fragment toolbar overlays child fragment toolbar.
getChildFragmentManager().beginTransaction().replace(R.id.rootFragmentLayout, fragment).commit();
Fragment layout is below:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:orientation="vertical"
android:id="#+id/rootFragmentLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/toolBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"/>
</android.support.design.widget.AppBarLayout>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/toolBarLayout"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</FrameLayout>
</LinearLayout>
</RelativeLayout>

If i understood it correctly, one Activity will house multiple fragments with only one toolbar. What you can do is use ViewPager to change between fragments. You'll need a ViewPager on your xml below your toolbar and then you can create a adapter that switches fragments for you.
In this example you supposedly have buttons to switch your fragments, as i call it btn1, btn2 and btn3 on the code
activity.xml
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<include layout="#layout/your_toolbar" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Activity.java
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
public class mActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
ButterKnife.bind(this);
adapter = new MyPagerAdapter(getSupportFragmentManager());
container.setAdapter(adapter);
container.addOnPageChangeListener(this);
// This means 3 fragments, change the number as you like
container.setOffscreenPageLimit(3);
container.setCurrentItem(1);
}
// Use this method so your toolbar views switch the fragments
#OnClick({R.id.btn1, R.id.btn2, R.id.btn3})
public void onViewClicked(View view) {
switch (view.getId()) {
case R.id.btn1:
container.setCurrentItem(0, true);
break;
case R.id.btn2:
container.setCurrentItem(1, true);
break;
case R.id.btn3:
container.setCurrentItem(2, true);
break;
}
}
}
PagerAdapter.java
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
public class MyPagerAdapter extends FragmentStatePagerAdapter {
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int pos) {
switch (pos) {
case 0:
return new YourFragmentClass1();
case 1:
return new YourFragmentClass2();
case 2:
return new YourFragmentClass3();
default:
return new YourFragmentClass1();
}
}
#Override
public int getCount() {
return 3;
}
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
}

How to handle drawer toggle and toolbar up when having toolbar for each fragment

I am using single activity and many fragments approach in my app
Now since in my some fragments I have custom view in toolbar I decided to have separate toolbar for each fragment.
How to implement separate toolbar for each fragment also the drawer layout is in my activity

I have the same problem, I will add custom toolbar view for each fragment.
My Utility method is:
public static View addRemoveViewFromToolbar(FragmentActivity fragmentActivity, int resourceId) {
Toolbar toolbar = removeViewFromToolbar(fragmentActivity);
if (resourceId == 0) {
return null;
} else {
View view = LayoutInflater.from(fragmentActivity).inflate(resourceId, toolbar, false);
toolbar.addView(view);
return view;
}
}
public static Toolbar removeViewFromToolbar(FragmentActivity fragmentActivity) {
Toolbar toolbar = (Toolbar) fragmentActivity.findViewById(R.id.toolbar);
if (toolbar.getChildCount() > 1) {
for (int i = 1; i <= toolbar.getChildCount(); i++) {
toolbar.removeViewAt(1);
}
}
return toolbar;
}
In my each fragment
//Create your custom view based on requirement
View view = Utility.addRemoveViewFromToolbar(getActivity(), R.layout.toolbar_search_view);
if (view != null) {
edtCategory1 = (EditText) view.findViewById(R.id.edtCategory1);
edtCategory1.setOnClickListener(this);
}
Hope this explanation help you :)

I'm not sure if I understood your description of the your app correctly, but I recently did what I think you described.
My activity layout was a DrawerLayout with an included CoordinatorLayout/AppBar layout with a single toolbar and a FrameLayout below. The menu.xml contained all the items I needed in my toolbar for all the fragments. Items clicked in the nav menu would swap out fragments in the FrameLayout. My onNavigationItemSelected() called on this method to swap out the fragments and handle the backstack:
public void switchView(int id, int optArg) {
if (currentView != id) {
currentView = id; //currentView keeps track of which fragment is loaded
FragmentTransaction transaction = getFragmentManager().beginTransaction();
//Fragment contentFragment is the current fragment in the FrameLayout
switch (id) {
case 0: //menu item 1
contentFragment = new Nav_Item1_Fragment();
transaction.replace(R.id.fragment_container, contentFragment, "");
break;
case 1: //menu item 2
contentFragment = new Nav_Item2_Fragment();
transaction.replace(R.id.fragment_container, contentFragment, "");
break;
case 2: //menu item 3
contentFragment = new Nav_Item3_Fragment();
transaction.replace(R.id.fragment_container, contentFragment, "");
break;
}
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack
// transaction.replace(R.id.fragment_container, contentFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();
}
}
and in each fragment's onPrepareOptionsMenu() I setVisible() hid/showed the menu items in the toolbar related to that fragment. Each item had an method in the activity pointed to by the menu item's onClick attribute that knew what fragment it was from and what views were passed to it.
The drawer was setup in the onCreate() of the activity with a ActionBarDrawerToggle like so:
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
activity xml:
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
...>
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
.../>
</android.support.v4.widget.DrawerLayout>
app_bar_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
...>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
...>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:gravity="top"
.../>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragment_container"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior">
</FrameLayout>
</android.support.design.widget.CoordinatorLayout>
So...One Nav menu, one App/Tool Bar, multiple fragments

Why do you specifically want a separate toolbar for each fragment?
You can easily change the toolbar view for each fragment.
In your function to switch fragments -
public void selectDrawerItem(MenuItem item) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction;
switch (item.getItemId()) {
case R.id.nav_home :
getSupportActionBar().setCustomView(R.layout.home_nav_bar);
fragmentClass = HomeFragment.class;
break;
case R.id.nav_settings :
getSupportActionBar().setCustomView(R.layout.settings_nav_bar);
fragmentClass = SettingsFragment.class;
break;
}
fragment = (Fragment) fragmentClass.newInstance();
fragmentManager.popBackStack(null,
FragmentManager.POP_BACK_STACK_INCLUSIVE);
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
So you can easily use the same toolbar and customize it according to your requirements for each fragment.

It can be done in a quite straightforward way.
First create an activity with a drawerlayout.
Second create a container viewpager inside the activity to hold
the fragments
Third implement a listener on your viewpager that will set the
relevant toolbar based on the fragment on display.
Let me illustrate by relevant XMLs and code
First the Drawerlayout XML for the main activity
<?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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_landing_page"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_landing_page"
app:menu="#menu/activity_landing_page_drawer" />
</android.support.v4.widget.DrawerLayout>
Please note the container layout app_bar_landing_page. Now the XML for this
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="me.veganbuddy.veganbuddy.ui.LandingPage">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
app:logo="#drawable/vegan_buddy_menu_icon"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="#+id/container_for_fragments"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
Note the viewpager which will act as container for fragments. Now the OnPageChangeListener on the viewpager.
mViewPager = (ViewPager) findViewById(R.id.container_for_fragments);
mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
switch (position+1){
case 0:setSupportActionBar(aToolbar);
break;
case 1:setSupportActionBar(bToolbar);
break;
case 2:setSupportActionBar(cToolbar);;
break;
case 3:setSupportActionBar(dToolbar);
break;
default:
break;
}
}
Let me know if any further clarification is needed

The simplest approach I would suggest is to use callbacks to activity. Whenever each fragment loads in the activity, arrange a callback to the activity and load the appropriate toolbar in the activity.
Have separate toolbar xmls in your layout folder. Use the include tag to put the toolbars in your activity. Keep only 1 toolbar visible at a time. When the fragment callbacks come to your activity make the necessary one visible.

It's very simple. Besides the onclick action for the Category fragment is taking you into a new activity, not a Fragment. Now, since drawer layout is in parent activity with navigation view and without toolbar then in the first drawer fragment is a tablayout having four tabs with viewpager and a toolbar on the top and inside one tab i.e HOME is the TOP CHARTS, CATEGORIES, EDITORS. Each toolbar must be implemented in each fragment layout and not in the activity layout since you want different toolbars for each fragment. Note that Toolbar is not a property of Fragment but it's a property of ActionBarActivity or AppCompatActivity, then in the onCreateView, of the fragment that's holding the HOME, GAMES, MOVIES, MUSIC, put down these codes.
public class Drawer1Fragment extends Fragment{
public Drawer1Fragment () {}
TabLayout tabLayout;
Toolbar toolbar;
DrawerLayout drawerLayout;
ViewPager viewPager;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View myChildRoot = inflater.inflate(R.layout.child_fragment_attachment, container, false);
tabLayout = myChildRoot.findViewById(R.id.tab_layout);
viewPager= myChildRoot.findViewById(R.id.container_viewPager);
toolbar = myChildRoot.findViewById(R.id.toolbar);
drawerLayout = getActivity().findViewById(R.id.drawer_layout);
((AppCompatActivity)requireActivity()).setSupportActionBar(toolbar);
((AppCompatActivity)requireActivity()).getSupportActionBar().setTitle(getActivity().getResources().getString(R.string.app_name));
((AppCompatActivity)requireActivity()).getSupportActionBar().setHomeButtonEnabled(true);
((AppCompatActivity)getParentFragment().requireActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(getActivity(),drawerLayout,toolbar,R.drawable.icons,R.string.app_name);
drawerLayout.addDrawerListener(toggle);
toggle.syncState();
// The back arrow of a toolbar in fragment is implemented below
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view)
{
if(!drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.openDrawer(GravityCompat.START);
} else {
getActivity().finish();
}
}
});
return myChildRoot;
}
}

Fragment to fragment to fragment get crash

I have a main activity , it contains lots of fragments.
Main activity layout looks like this:
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.user.taiwandigestionsociety_v11.MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF">
<include layout="#layout/toolbar"/>
//switch fragment over here
<FrameLayout
android:id="#+id/mainFrame"
android:layout_gravity="end"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</android.support.design.widget.AppBarLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#android:color/transparent"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header">
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
and I click the drawer item it will change to first fragment:
#Override
public void onClick(View view) {
int id = view.getId();
if (id == R.id.activitiesContents) {
//change to first fragment successful
switchFragment(ActivityList.newInstance());
toolbar.setTitle(R.string.activitiesContents);
drawerLayout.closeDrawer(GravityCompat.START);
}
}
my switch fragment function:
public void switchFragment(Fragment fragment) {
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.mainFrame, fragment, null);
//transaction.addToBackStack(null);
transaction.commit();
}
then i click the button in first fragment, it changes to second fragment too:
//take me to second fragment succeed
switchFragment(ActivityHomePage.newInstance());
finally i click the button in second fragment, it crashed
//i want to switch to third fragment , just the same with previous
switchFragment(NewsInformation.newInstance());
the error log:
Why i got crash when i switch to third fragment? I completely have no clue.
I found the crash function function , because I set the class:
public class CommonSwitch extends Fragment {
//switch Fragment
public void switchFragment(Fragment fragment) {
FragmentManager manager = getActivity().getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.mainFrame, fragment, null);
//transaction.addToBackStack(null);
transaction.commit();
}
}
and I try to call it new CommonSwitch.switchFragment(goToFragment);
now I have set public void switchFragment every Fragment class.
Why when I set new CommonSwitch will cause crash ?

Your Activity state is Not Maintain.
On second layer use Activity instead of Fragment . Follow Android Standards.
According to standards Third Fragment should be Activity. otherwise you have to maintain MainActivity state.
Thanks

Android toolbar navigation back button callback never called

I know there are a lot of question like this answered, but nothing I found works.
I have an activity (MainActivity) that takes care of showing different fragments. Also, in the activity, I have navigation drawer which I show only on one fragment (it is hidden on others).
The problem is that toolbar navigation callback is never called. Back button is showed, but click on it does nothing. Also (I don't know if it makes any difference) but user get to that fragment from another one in which I do same things as in this one except navigation back button is hidden.
XML for activity is this:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/main_toolbar"
layout="#layout/toolbar"/>
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/drawer_header"
app:menu="#menu/activity_main_drawer"/>
</android.support.v4.widget.DrawerLayout>
Included toolbar:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
app:theme="#style/Base.ThemeOverlay.AppCompat.Dark.ActionBar"/>
Now, in activity I setup a toolbar and put a listener on its back button:
setSupportActionBar(mainToolbar);
setTitle(getResources().getString("Some title"));
mainToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
onBackPressed();
}
});
In that specific fragment where I need back button I do this to show it:
if (this.context.getSupportActionBar() != null) {
this.context.getSupportActionBar().setTitle("Fragment title"));
this.context.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
this.context.getSupportActionBar().setDisplayShowHomeEnabled(true);
}
And, since I don't want navigation drawer to be used/showed, in the fragment I call a method defined in the activity that executes this code:
drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
drawerToggle.setDrawerIndicatorEnabled(false);

On a specific fragment where you want to show back button simply add that fragment to backstack
add this BackStack change listener to Activity
#Override
public void onBackStackChanged() {
if (getSupportFragmentManager().getBackStackEntryCount() != 0)
mToolbar.setNavigationIcon(R.drawable.ic_action_back);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onBackPressed();
}
});
}
}
to add to backStack you can use that line
if you pass true to addtoback stack then it will add in and backstack.
public void changeFragment(Fragment fragment, boolean addtobackstack) {
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.fragment_enter, R.anim.fragment_exit);
fragmentTransaction.replace(R.id.fragment_container, fragment, MainActivity.TAG);
if (addtobackstack)
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}

Replacing fragments in one activity

I am able to add a fragment to my fragmentlayout, but when I'm trying to replace the fragment with a new one the screen is blank. I can add a new fragment but then it's not scrollable. I'm also not able not remove a fragment.
Does someone know what I'm doing wrong? I red a lot about it and I feel like I have tried everything..
The framelayout is defined static:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minWidth="25px"
android:minHeight="25px">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>'
And this is the method for switching fragments:
void TabOnTabSelected (object sender, ActionBar.TabEventArgs tabEventArgs)
{
ActionBar.Tab tab = (ActionBar.Tab)sender;
var fragmentTransaction = FragmentManager.BeginTransaction ();
switch (tab.Text) {
case "vandaag":
if (currentFragment != null) {
fragmentTransaction.Remove (FragmentManager.FindFragmentByTag ("gister"));
}
if (fragmentToday == null) {
fragmentToday = WZWVDataOverview.NewInstance (DateTime.Now.AddDays (0).ToString ("d-M-yyyy"));
}
fragmentTransaction.Add (Resource.Id.fragment_container, fragmentToday, "vandaag");
currentFragment = fragmentToday;
break;
case "gister":
if (currentFragment != null) {
fragmentTransaction.Remove (currentFragment);
}
if (fragmentYesterday == null) {
fragmentYesterday = WZWVDataOverview.NewInstance (DateTime.Now.AddDays (-1).ToString ("d-M-yyyy"));
}
currentFragment = fragmentYesterday;
fragmentTransaction.Add (Resource.Id.fragment_container, currentFragment, "gister");
break;
case "morgen":
if (currentFragment != null) {
fragmentTransaction.Remove (currentFragment);
}
if (fragmentTomorrow == null) {
fragmentTomorrow = WZWVDataOverview.NewInstance (DateTime.Now.AddDays (+1).ToString ("d-M-yyyy"));
}
fragmentTransaction.Add (Resource.Id.fragment_container, fragmentTomorrow);
currentFragment = fragmentTomorrow;
break;
}
fragmentTransaction.Commit ();
}
XML of the framelayout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minWidth="25px"
android:minHeight="25px">
<ListView
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/list" />
</LinearLayout>
Huge thanks in advance!

You can try using the .replace method. If you do not wish to be able to move back to the previous fragment than you can remove addToBackStack().
This may need to be altered slightly to fit your application.
FragmentManager fragmentManager = getFragmentManager();
Fragment mFragment = new DetailFragment();
mFragment.setArguments(bundle);
fragmentManager.beginTransaction().replace(R.id.fragment_container, mFragment).addToBackStack("DETAILFRAGMENT").commit();
POSSIBLE SECOND SOLUTION:
Check to see how your Fragment layout XML is. Possibly try using a FrameLayout as the parent.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.modup.fragment.DetailFragment">
<!-- TODO: Update blank fragment layout -->
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</LinearLayout>
</FrameLayout>

I have open fragments from navigation view as items are selected from it.(I have use DataBinding Concept)
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<layout>
<RelativeLayout 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/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.k15.projectkhyatisalesapp.activities.MainActivity">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
app:titleTextColor="#ffffff"
android:background="#ef6c00"
android:minHeight="?attr/actionBarSize"
app:popupTheme="#style/AppTheme.PopupOverlay"
android:theme="#style/ThemeOverlay.AppCompat.Dark"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="55dp"
android:orientation="horizontal">
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<FrameLayout
android:layout_width="wrap_content"
android:id="#+id/activity_main_frame_layout"
android:layout_height="wrap_content"/>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/activity_main_navigation"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="#menu/listnavigation" />
</android.support.v4.widget.DrawerLayout>
</LinearLayout>
</RelativeLayout>
<layout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
//Declaration of Variables
private ActivityMainBinding mainBinding; //for binding values in xml
private ActionBarDrawerToggle mDrawableToogle; //This class provides a handy way to tie together the functionality of DrawerLayout and the framework ActionBar to implement the recommended design for navigation drawers.
private Fragment fragment;
private Class fragmentClass = null; //pointing to class of fragment
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);
setSupportActionBar(mainBinding.toolbar); //o designate a Toolbar as the action bar for an Activity
setUpDrawer(mainBinding.activityMainNavigation); //for select items in navigationView
mDrawableToogle = setupToogle();
mainBinding.drawerLayout.addDrawerListener(mDrawableToogle);
}
//private method to set navigationView
private void setUpDrawer(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
try {
selectItem(item); //call when item is selected from navigationView
} catch (IllegalAccessException | InstantiationException e) {
e.printStackTrace();
}
return true;
}
});
}
//items are selected from navigationView
public void selectItem(MenuItem menuItem) throws IllegalAccessException, InstantiationException {
switch (menuItem.getItemId()) {
case R.id.Home:
fragmentClass = Home.class;
break;
case R.id.Product:
fragmentClass = Product.class;
break;
case R.id.Media:
fragmentClass = Media.class;
break;
}
assert fragmentClass != null;
fragment = (Fragment) fragmentClass.newInstance();
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(mainBinding.activityMainFrameLayout.getId(), fragment).commit(); //change the fragment
setTitle(menuItem.getTitle());
menuItem.setCheckable(true); //for set selected item
mainBinding.drawerLayout.closeDrawers();
}
#Override
protected void onPostCreate(#Nullable Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawableToogle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawableToogle.onConfigurationChanged(newConfig);
}
private ActionBarDrawerToggle setupToogle() {
return new ActionBarDrawerToggle(this, mainBinding.drawerLayout, mainBinding.toolbar, R.string.open, R.string.close);
}
menu/listnavigation.xml is attached to navigation view I contains items of navigation view.
In my code as items are selected from navigation view accordingly fragment is replaced. Here Home, Product, Media are my fragment, you can create any fragment.

Try using fragmentTransaction.replace() instead of fragmentTransaction.add() and comment out code for removing fragments. When you replace the fragment - it gets removed. Also - remember to call: fragmentTransaction.commit() when you are done with replacing fragments.