Develop Reference

Replace one fragment with an another fragment

I want to replace an old Fragment with a new Fragment, but i still get the buttons of the old Fragment that is still visible in the new fragment.
In the old one, on a button click
FragmentTransaction transaction = getFragmentManager().beginTransaction();
Fragment newFragment = GenericMood.newInstance("a","b");
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack if needed
transaction.replace(R.id.allmoods, newFragment);
transaction.addToBackStack(null);
transaction.commitAllowingStateLoss();
I can replace the old Fragment with the new one, but the buttons from R.id.allmoods Fragment still visible on top of the new Fragment.
I tried with this given below code.
FragmentTransaction transaction = getFragmentManager().beginTransaction();
Fragment newFragment = GenericMood.newInstance("a","b");
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack if needed
transaction.replace(((ViewGroup)getView().getParent()).getId(), newFragment);
transaction.addToBackStack(null);
transaction.commitAllowingStateLoss();
XML files:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/allmoods"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
tools:context="com.moodoff.Moods">
<Button
android:text="Button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="64dp"
android:id="#+id/btn_btn"
android:height="80dp"
android:width="100dp"
android:onClick="putmeoff"
android:layout_marginLeft="17dp"
android:layout_marginStart="17dp"/>
</RelativeLayout>
This is the fragment that is supposed to replace the above:
<FrameLayout 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:id="#+id/genericmood"
android:layout_height="match_parent"
android:background="#color/colorPrimary"
tools:context="com.moodoff.GenericMood">
<!-- TODO: Update blank fragment layout -->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#000000"
android:layout_gravity="fill_horizontal"
android:id="#+id/floatingButtons"
>
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="1dp"
android:layout_marginRight="14dp"
app:backgroundTint="#ffffff"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:src="#drawable/cameraicon"
android:id="#+id/btn_camera"
app:fabSize="mini"
/>
</RelativeLayout>
</FrameLayout>
Both doesn't work. What to do?
UPDATE: After replacing with the proper container the buttons had gone but the new fragment is not getting instantiated properly. I gets a pure blank white screen.
my activity_alltabs.xml looks like 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:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.moodoff.AllTabs">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/background_dark" />
</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>

I Have worked on fragments before and hope this would help you out and give you a better understanding of the flow. Firstly, your MainActivity.xml file will look like this :
<?xml version="1.0" encoding="utf-8"?>
<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:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.example.activity.HomeActivity">
//This frameLayout will contain all your fragments view.
<FrameLayout
android:id="#+id/container_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</RelativeLayout>
Next, you create two fragments and their XML is mentioned below :
fragment1.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true" // important to have this
tools:context=".fragments.frament1">
<Button
android:id="#+id/btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"/>
</RelativeLayout>
The next fragment would look exactly the same as mentioned above. Here is the Fragment1.class:
public class Fragment1 extends Fragment implements View.OnClickListener {
Button btn;
public Fragment1() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment1, container, false);
view.setBackgroundColor(Color.WHITE);
//Perform required conditions and return view
button = (Button) view.findViewById(R.id.btn);
button.setOnClickListener(this);
return view;
}
public void onClick(View v) {
switch(v.getId())
{
case R.id.btn:
//replace current fragment on button click
Fragment fragment2= new Fragment2();
getFragmentManager().beginTransaction().
replace(R.id.container_view, fragment2).
addToBackStack("frags").commit();
break;
}
}
}
And the Fragment2 would be as follows :
public class Fragment2 extends Fragment{
String TAG = "Fragment2";
public Fragment2() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment2,container,false);
view.setBackgroundColor(Color.WHITE);
return view;
}
}
As I mentioned earlier, the xml file would be the same as fragment1.xml. What is more important here is that the main activity will contain a layout which will take the fragments view when ever the user switches fragments. Hence we use the replace method which would just replace the previous view with the fragments view specified by us.

To understand the flow of fragment transition, first of all, you have to know about its structure in activity.
Let's see:
a) Activity: At bottom of everything (MainActivity)
activity_main.xml :-
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
Here #+id/container is the layout over we do transitions of fragment contents.
B) FragmentA : Initially added fragment to the container of MainActivity.
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
//Instance of fragment
Fragment newFragment = FragmentA.newInstance("a","b");
//It will replace the fragment content view to container of main activity
ft.replace(R.id.container, newFragment);
//FragmentA is added to back stack with it's name as a tag
ft.addToBackStack(FragmentA.class.getSimpleName());
ft.commitAllowingStateLoss();
B) FragmentB : Replace FragmentA with FragmentB
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
//Instance of fragment
Fragment newFragment = FragmentB.newInstance("a","b");
//It will replace the fragment content view to container of fragment A which // is previously replaced to main activity container
ft.replace(R.id.container, newFragment);
//FragmentB is added to back stack with it's name as a tag
ft.addToBackStack(FragmentB.class.getSimpleName());
ft.commitAllowingStateLoss();
So main thing behind this is to replace/add fragment content view to the activity container view.

In your Activity's onCreate function, you should be calling setContentView(R.layout.main), then when you want to load a Fragment, you choose a ViewParent within R.layout.main. The fragment will become the child of that ViewParent. So the id passed into FragmentTransaction.replace, is the id of the ViewParent in R.layout.main.
It makes sense that the Button in your allmoods RelativeLayout would remain because the FragmentTransaction.replace function only replaces an existing fragment that is in that container. Everything in R.layout.main will remain. This is how an Activity keeps static content, like drawers or toolbars.
When you load your "new fragment" you will use the same id. So the "new fragment" replaces the "old fragment" as the new child of the ViewParent within R.layout.main.
Here is the Fragments API guide.
Update:
When you call FragmentTransaction.replace in your Activity's onCreate function, this could be recreating an existing Fragment. Make sure the savedInstanceState (the Bundle passed into onCreate) is null. If the savedInstanceState is not null, then the fragment probably already exists and you can find it like this;
Fragment f = getFragmentManager().findFragmentByTag(YOUR_FRAGMENT_TAG);
Update 2:
Here is a guide that should help you. It looks like you could use FragmentPagerAdapter to simplify your fragment transactions.

try this once,
1. if you are passing any value upon button click
In Activity
Category category=new Category();
Bundle bundle=new Bundle();
bundle.putString("heading",heading);
bundle.putInt("position",position1+1);
bundle.putString("url",url);
bundle.putString("sku",sku);
bundle.putBoolean("flag",flag);
category.setArguments(bundle);
FragmentManager fragmentManager = getSupportFragmentManager();
final FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragmentCategories,category);
fragmentTransaction.commit();
In fragment
Bundle bundle=getArguments();
if(getArguments()!=null) {
position = bundle.getInt("position");
heading = bundle.getString("heading");
url = bundle.getString("url");
sku=bundle.getString("sku");
flag=bundle.getBoolean("flag");
tvHeading.setText(heading);
video_chapter = handler.getContent_Aspects(position);
adapter = new Chapter_content_Adapter(getActivity(), video_chapter, url, heading, position);
gvChapter.setAdapter(adapter);
}
2.if simply calling fragment
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentCategories=fragmentManager.findFragmentById(R.id.fragmentCategories);
fragmentTransaction.commit();

Try the following code.
A) Create Activity as follows :
MainActivity
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity implements ShowNextFragment{
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentA fragmentA=new FragmentA();
FragmentTransaction fragmentTransaction=getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.container,fragmentA);
fragmentTransaction.addToBackStack("A");
fragmentTransaction.commitAllowingStateLoss();
}
#Override
public void showFragment() {
FragmentB fragmentB=new FragmentB();
FragmentTransaction fragmentTransaction=getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.container,fragmentB);
fragmentTransaction.addToBackStack("B");
fragmentTransaction.commitAllowingStateLoss();
}
}
B) Create 2 fragments as follows :
Fragment A
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentA extends Fragment {
private ShowNextFragment showNextFragment;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
try {
showNextFragment=(ShowNextFragment)getActivity();
Log.e("CAllback","Set");
}catch (ClassCastException e){
Log.e("Error","Please Implement ShowFragment Interface");
}
return inflater.inflate(R.layout.fragment_a,container,false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
view.findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (showNextFragment!=null){
showNextFragment.showFragment();
}
}
});
}
}
Fragment B
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FragmentB extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_b,container,false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
}
C) Create an interface as follows
public interface ShowNextFragment {
void showFragment();
}
D) create following xmls as :
i) activity_main
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</RelativeLayout>
ii) fragment_a
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorcyan"
android:orientation="vertical">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Fragment B" />
</LinearLayout>
iii) fragment_b
<?xml version="1.0" encoding="utf-8"?>
<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"
android:background="#color/colorgreen"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment B"
android:layout_centerVertical="true"
android:layout_alignRight="#+id/btn_camera"
android:layout_alignEnd="#+id/btn_camera" />
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:backgroundTint="#ffffff"
android:src="#android:drawable/ic_dialog_email"
android:id="#+id/btn_camera"
app:fabSize="mini"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>

The problem was the the container ID that was passing to the replace method was the ID of the fragment that was replacing, not the ID of the fragment container. This seems to explain why some of the original fragment controls were remaining after the replace - that entire fragment wasn't being replaced.
Please change it to get the fragment container view ID, and it will work! Here's the code:
transaction.replace(((ViewGroup)(getView().getParent())).getId(), fragment);
I found the answer for getting the container view ID of a fragment here, Get fragment's container view id.

Just make buttons setVisibility(View.GONE) in your activity when that fragment is begin transaction.

put your next fragment UI elements in Card View. define a LinearLayout or other view groups as root and inside this root create a Card view and put your other elements in Card View . when you inflate it in Card View then the hole of new fragment inflate on the previous fragment.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parenter code hereent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="-20dp"
app:cardCornerRadius="20dp">
......... your UI Elements .......
//, for example, define other LinearLayout inside the Card View
and put other elements inside it like TextView, Button and
so on...
</androidx.cardview.widget.CardView>
</LinearLayout>

Open fragment from activity?

I wanna open fragment from my activity. The problem is that the fragment never appears.
This is the part of my activity:
btn_opciones.setOnValueChangedListener(new ToggleButton.OnValueChangedListener() {
#Override
public void onValueChanged(int position) {
if(position == 1){
OrdenarComplejosFragment ordenarComplejosFragment = new OrdenarComplejosFragment();
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.setCustomAnimations(R.anim.fade_in, R.anim.fade_out);
ft.add(ordenarComplejosFragment, null);
ft.commit();
}
}
});
And this is my fragment that I wanna open and show:
public class OrdenarComplejosFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_ordenar_complejos, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//do your stuff for your fragment here
}
}
The xml of the fragment above:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="HOLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
android:id="#+id/textView35"
android:layout_gravity="center_horizontal" />
</LinearLayout>
I don't know why the fragment never show. The button works fine.

Try using a different "add" method. Using the one which takes in a view id indicates where the fragment should show up within the existing Activity's layout.
ft.add(R.id.fragment_frame, ordenarComplejosFragment);
Fragments are always housed within an Activity. If your activity doesn't provide a container/location for the fragment to show up, you'll need to re-think the layout or consider opening this new view with a separate Activity.

Naviagation Drawer Stuck with Fragments Injection

I am trying to add to the navigation drawer using fragments as follows using the onNavigationDrawerItemSelected But the compiler is giving me a incomparable type I do not no how I am new to Andriod I used the NaviagationDrwaer Template app to give me heads start.
I am hopeing someone can point me in the right direction with this been driving me nuts. Also any ideas with this apporach how one would handle icons in the menu ?.
public void onNavigationDrawerItemSelected(int position) {
Fragment fragment;
switch(position){
case 0:
fragment = new HomeFragment(); --- This line is where the error comes
break;
}
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager()
fragmentManager.beginTransaction()
.replace(R.id.container, fragment)
.commit();
}
My HomeFragment Class Conists Of
public class HomeFragment extends Fragment {
View rootview;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootview = inflater.inflate(R.layout.home_layout, container, false);
return rootview;
}
}
And my home_layout file as follows
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="com.example.davidbuckley.cautioapp.home">
<!-- TODO: Update blank fragment layout -->
<TextView android:layout_width="match_parent" android:layout_height="match_parent"
android:text="#string/hello_blank_fragment" />
</RelativeLayout>

One of your fragments is probably a 'support' Fragment: http://developer.android.com/reference/android/support/v4/app/Fragment.html
While the other is probably a native Fragment: http://developer.android.com/reference/android/app/Fragment.html

java.lang.IllegalArgumentException: No view found for id 0x1020002 (android:id/content) for fragment

I am trying to move from one fragment to another.. It shows following error during fragment transaction-
java.lang.IllegalArgumentException: No view found for id 0x1020002 (android:id/content) for fragment PhotosFragment2{41a57218 #3 id=0x1020002}
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:930)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:446)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:153)
at android.app.ActivityThread.main(ActivityThread.java:5086)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
at dalvik.system.NativeStart.main(Native Method)
Below are the classes.I have used following code for fragment transaction
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
PhotosFragment.java
public class PhotosFragment extends Fragment {
private FragmentActivity myContext;
#Override
public void onAttach(Activity activity) {
myContext = (FragmentActivity) activity;
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.photos, container, false);
rootView.setVerticalScrollBarEnabled(false);
int[] mThumbIds = {
R.drawable.album8, R.drawable.album3,
R.drawable.album4, R.drawable.album8,
R.drawable.album6, R.drawable.album7,
R.drawable.album12, R.drawable.album10,
};
int[] mThumbIds2 = {
R.drawable.album8, R.drawable.album3,
R.drawable.album4,
R.drawable.album6, R.drawable.album7,
R.drawable.album9, R.drawable.album10,
R.drawable.album11, R.drawable.album12, R.drawable.album8,
R.drawable.album8, R.drawable.album3,
R.drawable.album4,
R.drawable.album6, R.drawable.album7,
R.drawable.album9, R.drawable.album10,
R.drawable.album11, R.drawable.album12, R.drawable.album8,
};
CustomGridSingle2 adapter = new CustomGridSingle2(myContext, mThumbIds);
GridView grid = (GridView)rootView.findViewById(R.id.gridView);
final ImageView img= (ImageView)rootView.findViewById(R.id.imageView7);
grid.setFocusable(false);
grid.setAdapter(adapter);
grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
});
CustomGridSingle2 adapter2 = new CustomGridSingle2(myContext, mThumbIds2);
GridView grid2 = (GridView)rootView.findViewById(R.id.gridView2);
grid2.setFocusable(false);
grid2.setAdapter(adapter2);
grid2.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Fragment fragment = new PhotosFragment2();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(android.R.id.content, fragment);
fragmentTransaction.commit();
}
});
return rootView;
}
}
PhotosFragment2.java
public class PhotosFragment2 extends Fragment {
private FragmentActivity myContext;
#Override
public void onAttach(Activity activity) {
myContext = (FragmentActivity) activity;
super.onAttach(activity);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View rootView = inflater.inflate(R.layout.photos2, container, false);
myContext.getActionBar().hide();
return rootView;
}
}
Activity xml file
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="#+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="#+id/left_drawer_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#drawable/bgmenu"
android:orientation="vertical">
<RelativeLayout
android:id="#+id/profilelayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:paddingTop="10dp">
<ImageView
android:id="#+id/drawer_profile_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/drawer_profile_background"
android:layout_alignLeft="#+id/drawer_profile_background"
android:layout_alignRight="#+id/drawer_profile_background"
android:layout_alignTop="#+id/drawer_profile_background"
android:layout_marginBottom="7.667dp"
android:layout_marginLeft="6.5dp"
android:layout_marginRight="8.3dp"
android:layout_marginTop="7.667dp"
android:scaleType="centerCrop"></ImageView>
<ImageView
android:id="#+id/drawer_profile_background"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:scaleType="centerCrop"
android:src="#drawable/profileblock">
</ImageView>
<ImageView
android:id="#+id/settingicon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/drawer_profile_background"
android:layout_marginLeft="-15dp"
android:layout_toRightOf="#+id/drawer_profile_background"
android:background="#drawable/settings" />
<textview
android:id="#+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/drawer_profile_background"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:text="Name"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:textColor="#android:color/white" />
</RelativeLayout>
<ListView
android:id="#+id/list_slidermenu"
style="#style/buttonStyle"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="30dp"
android:layout_weight="2"
android:cacheColorHint="#android:color/transparent"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="1dp"
android:listSelector="#android:color/transparent"
android:scrollbars="none" />
</LinearLayout>
</android.support.v4.widget.DrawerLayout>

When you use fragmentTransaction.replace(R.id.container,fragment) it will remove any fragments that are already in the container and add your new one to the same container.
Now i can suggest you 2 things.First, if you want to use fragmentTransaction.replace(android.R.id.content, fragment); which you are doing right now,then don't set content for your Activity using setContentView.This should work fine then.To know what exactly android.R.id.content is you can refer this stackoverflow question and answer
Or Secondly, In the layout of your Activity have a FrameLayout whose id is content. And then use
fragmentTransaction.replace(R.id.content, fragment);
fragmentTransaction.addToBackStack(null);//add the transaction to the back stack so the user can navigate back
// Commit the transaction
fragmentTransaction.commit();
Hope this helps.
More Info:
From your comments it seems that you are having some problem in getting the idea of using FrameLayout in your Activity's layout(Not of any of the Fragment's layout).From the Documents
FrameLayout is designed to block out an area on the screen to display a single item. Generally, FrameLayout should be used to hold a single child view, because it can be difficult to organize child views in a way that's scalable to different screen sizes without the children overlapping each other.
So the main purpose of FrameLayout is to block the area required to fit the largest child view. If you use a FrameLayout as Fragment Container you can ensure that you always have the space available to accommodate the largest Fragment's layout.
So you can have your FrameLayout something like this in your Activity's layout xml file
<FrameLayout
android:id="#+id/content"
android:layout_height="match_parent"
android:layout_width="match_parent">
<!--you can put your existing views of your current xml here, so yes your entire xml is now inside this FrameLayout -->
</FrameLayout>

I don't use getSupportFragmentManager().
I use getChildFragmentManager() and it worked for me.
You can try it.

If you are trying to put Fragment into Fragment, use getChildFragmentManager()

If you are using ViewPager, use getChildFragmentManager() for pager adapter
viewPager.setAdapter(new ItemsAdapter(getChildFragmentManager()));

You have to set a content view in your Activity that your PhotosFragment is attached.
protected void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.activity_main);
//...
}

i know this is very late. But it may work for other's.
I declared the id for each layout, like (3rd line bellow)
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"

Since Android 4.2 (API 17) nested fragments become avaliable.
See this
To place fragment inside other fragment use getChildFragmentManager()
Also available in support library.

I had the same error and after trying a lot of things I found that the problem was with the "id" and "getActivity().getSupportFragmentManager()".
Before i implement i like these
txt_more.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
getChildFragmentManager()
.beginTransaction()
.replace(R.id.content_frame, new OpportunitiesFragment())
.commit(); }
});
Then i changed to these
txt_more.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
## Heading ##
getActivity().getSupportFragmentManager()
.beginTransaction()
.replace(android.R.id.content, new OpportunitiesFragment())
.commit(); }
});

Put this block of code in PhotosFragment2 onCreateView method:
View rootView = inflater.inflate(R.layout.photos2, null);
instead of:
View rootView = inflater.inflate(R.layout.photos2, container, false);

in my case I had to change
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.sample,
container);
to
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.sample,
container, false);

This answer highlights a silly mistake that may occur, that arises when nesting fragments or you are converting activities to fragments.
If you are trying to replace a fragment within a fragment with the fragmentManager but you are not inflating the parent fragment that can cause an issue.
In BaseFragment.java OnCreateView:
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.replace(R.id.container, new DifferentFragment())
.commit();
}
return super.onCreateView(inflater, container, savedInstanceState);
Replace super.onCreateView(inflater, container, savedInstanceState);
with inflating the correct layout for the fragment:
return inflater.inflate(R.layout.base_fragment, container, false);

The problem may be that you add a fragment and beginTransaction in some fragment like
getFragmentManager().beginTransaction().replace(android.R.id.content, ImageBrowseFragment.newInstance(bundle),"ImageBrowseFragment")
.addToBackStack(null).commit();
I just change getFragmentManager() to getActivity().getSupportFragmentManager()
Then everything goes fine
When you add a fragment in a fragment use android.R.id.content Or Window.ID_ANDROID_CONTENT,I guess it represents the root container of your fragment not the activity. So change to getActivity().getSupportFragmentManager() works it out

If you use ViewPager with fragments (pages) and try to show a new fragment from a page, you will get this error. I think, you cannot reference to a container of an Activity from a ViewPager's page.
In this case you should call getActivity(). Then in Activity write a method that will open a new fragment.
class YourActivity : AppCompatActivity() {
fun showNewFragment(title: String) {
val fm = supportFragmentManager
fm?.beginTransaction()?.apply {
val fragment = NewFragment.newInstance(title)
replace(R.id.container, fragment, NewFragment.TAG)
addToBackStack(null)
}?.commit()
}
}
class PageFragment : Fragment() {
private fun show() {
(activity as YourActivity).showNewFragment("New fragment")
}
}
If you call getParentFragment() and add a new fragment, then you will place a new fragment inside ViewPager:
class ViewPagerFragment : Fragment() {
fun showNewFragment(title: String) {
val fm = childFragmentManager
fm?.beginTransaction()?.apply {
val fragment = NewFragment.newInstance(title)
replace(R.id.container, fragment, NewFragment.TAG)
addToBackStack(null)
}?.commit()
}
}
class PageFragment : Fragment() {
private fun show() {
(parentFragment as? ViewPagerFragment)?.showNewFragment("New fragment")
}
}

Make sure the fragment id you are calling is in the class listed in setcontent in onCreate method. For my case, I was editing the layout from linear to constraint. So as not to mess with the working code, I made another layout but messed an id in the process so that what was on oncreate was the edited layout but the fragment being called was from the old layout. Apparently, in the new layout I gave it a different id name. Search the id of your fragment using ctrl+shift+f and see if the search results point to the layout you specified in the oncreate method. Goodluck.

The most common mistake that can be happened is, If you have more than one version of XML layout (let say v21 and v23) and you added <fragment> tag in lower version of XML only (or vice-versa).
So, please check you added <fragment> tag (or pageGroup, etc) in both of the versions.

You are trying to open fragment which fragmentContainer(the view in which you are trying to open fragment) is one or more level above from your current fragmentContainer.
Try to change your fragment hierarchy architecture.

disable button in fragment from main activity

I have 3 buttons in a fragment and I want to disable them from the main activity. I have tried to use the bundle option before replace() newfragment but it created other issues. Can a button in a fragment be casted to a main activity ? Something like this. I get the error cannot cast but my entries are incorrect.
RedUp = (ButtonControls) getFragmentManager().findFragmentById(R.id.btnRedUP);
Here is my main.xml this holds the fragment called rgb_controls
<FrameLayout
android:id="#+id/rgb_controls"
android:layout_width="390dp"
android:layout_height="match_parent"
android:layout_marginLeft="550dp"
android:layout_marginTop="10dp" >
</FrameLayout>
Here is the button in the fragment xml called button_controls.xml
<Button
android:id="#+id/btnRedUP"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="80dp"
android:text="UP"
android:textSize="30dp" />
Here is the fragment actiivty
public class ButtonControls extends Fragment {
public Button RedUp, RedDn, GreenUp, GreenDn, BlueUp, BlueDn;
View view;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.button_controls, container, false);
RedUp = (Button) view.findViewById(R.id.btnRedUP);
return view;
}
}
Fragment is added using the replace()
Fragment ButtonFragment = new ButtonControls();
ButtonFragment.setArguments(bundle);
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.rgb_controls, ButtonFragment).addToBackStack(null).commit();

Something like this should do the thing:
ButtonControls fragment = (ButtonControls)
getFragmentManager().findFragmentById(R.id.rgb_controls);
fragment.setButtonsGone();
You have to actually implement this setButtonsGone method in ButtonControls. Something as:
public void setButtonsGone() {
RedUp.setVisibility(View.GONE);
RedDn.setVisibility(View.GONE);
GreenUp.setVisibility(View.GONE);
GreenDn.setVisibility(View.GONE);
BlueUp.setVisibility(View.GONE);
BlueDn.setVisibility(View.GONE);
}