Develop Reference

Fragment keeps on adding when the button is clicked

ImageButton imageButton3 =(ImageButton)view.findViewById(R.id.item_two_timer_id);
imageButton3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getFragmentManager().beginTransaction()
.replace(R.id.container2_main , new TimerFragment2())
.addToBackStack(null)
.commit();

While adding fragment add a tag to identify it.get the fragment by tag and see if the fragment is present.If it is not present create a new Instance and add it.
ImageButton imageButton3 = (ImageButton) view.findViewById(R.id.item_two_timer_id);
imageButton3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
TimerFragment2 timerFragment2;
timerFragment2 = (TimerFragment2) getFragmentManager().findFragmentByTag(TimerFragment2.class.getSimpleName());
if(timerFragment2==null){
timerFragment2=new TimerFragment2();
getFragmentManager().beginTransaction()
.replace(R.id.container2_main, timerFragment2,TimerFragment2.class.getSimpleName())
.addToBackStack(TimerFragment2.class.getSimpleName())
.commit();
}else {
//Dont create fragment again
}
}
});

please try this code if you are setting one fragment
private void initFragment() {
SelectTypeFragment fragment = new SelectTypeFragment();
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left, R.anim.enter_from_left, R.anim.exit_to_right); //if you want to set animation
fragmentTransaction.replace(R.id.fl_addvehicle, fragment);
fragmentTransaction.commit();
}
if you are replacing one fragment to with another.
void goToNextFragment() {
((CreateOfferActivity) this.getActivity()).setCreateOfferModel(createOfferModel);
SelectVehicleFragment fragment = new SelectVehicleFragment();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left, R.anim.enter_from_left, R.anim.exit_to_right);
fragmentTransaction.replace(R.id.fl_create_offer, fragment).
addToBackStack("select_vehicle");
fragmentTransaction.commit();
}

You can check it in Fragment but first,
You need to create an object of Fragment TimerFragment2 and check if it's visible or not in timerFragment.isVisible()
ImageButton imageButton3 =(ImageButton)view.findViewById(R.id.item_two_timer_id);
TimerFragment2 timerFragment = new TimerFragment2();
imageButton3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(!timerFragment.isVisible())
getFragmentManager().beginTransaction()
.replace(R.id.container2_main , timerFragment)
.addToBackStack(null)
.commit();

Attach a Fragment to the Activity

I am trying to attach a Fragment to my MainActivity programmatically by using the following code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
MainFragment fragment = new MainFragment();
fragmentTransaction.add(R.id.activity_main,fragment);
fragmentTransaction.commit();
}
it gives me an error: cannot resolve add method
The application can be found here

Replace your code:
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
MainFragment fragment = new MainFragment();
fragmentTransaction.add(R.id.activity_main,fragment);
fragmentTransaction.commit();
By this:
Fragment fragment = new MainFragment();
getSupportFragmentManager.begintransaction.replace(R.id.container,fragment).commit;

first of all your take framelayout in activity_main.after that
fragmentTransaction.add(R.id.framelayout_id,fragment);
than its working fine

Make a function like that
public void openFragment(Fragment fragment) {
FragmentManager manager = getSupportFragmentManager();
manager.beginTransaction().replace(R.id.fragmentContainer, fragment).commit();
}
and call this in your onCreate Method
openFragment(new yourFragment());
In your beginTransaction().replace method you have to pass the view from which you want to replace your fragment with

View Issue Calling SecondFragment from FirstFragment

I am making a simple demo project using Fragments, in which i am calling SecondFragment from FirstFragment on button click.
And i called SecondFragment without any issue, but i getting view of both the Fragments SecondFragment and FirstFragment
So where i am doing mistake ?
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new FirstFragment()).commit();
}
}
public static class FirstFragment extends Fragment {
Button buttonCallSecondFragment;
public FirstFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_first, container,
false);
buttonCallSecondFragment = (Button) rootView.findViewById(R.id.button1);
buttonCallSecondFragment.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
FragmentManager fm = getFragmentManager();
SecondFragment fragment = new SecondFragment();
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.container, fragment);
ft.commit();
}
});
return rootView;
}
}
public static class SecondFragment extends Fragment {
public SecondFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_second, container,
false);
return rootView;
}
}
}

You need to remove the first fragment, you can do that either by usingreplace or first calling remove then add
To be able to press the back button add the transaction to the back stack,you do that by calling addToBackStack(tag) on your fragment manager. Tag may be null.

You are adding fragment on already displaying fragment in your android app.
FragmentTransaction ft = fm.beginTransaction();
ft.add(R.id.container, fragment);
ft.commit();
Do not add fragment but replace fragment when already one fragment is loaded on activity.
So for implementing that :
Please add your code in OnCreate() and add below code to your click listener :
FragmentManager fm = getFragmentManager();
SecondFragment fragment = new SecondFragment();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.container, fragment);
ft.addToBackStack(null);
ft.commit();
Thank you.!!

if you want to replace fragment you should call replace in place of add :
buttonCallSecondFragment = (Button) rootView.findViewById(R.id.button1);
buttonCallSecondFragment.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
FragmentManager fm = getFragmentManager();
SecondFragment fragment = new SecondFragment();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.container, fragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
}
});

You are adding the fragment so it will come on top of another fragment give background color to rootview of scecond fragment

you can also load that as Nested fragment
public void addFragB() {
FragmentManager childFragMan = getChildFragmentManager();
FragmentTransaction childFragTrans = childFragMan.beginTransaction();
SecondFragment 2ndfrag = new SecondFragment();
childFragTrans.add(R.id.fragA_LinearLayout, 2ndfrag);
//childFragTrans.addToBackStack("");
childFragTrans.commit();
}

No, you cannot communicate between fragments like this. You need to communicate between fragments via the container activity.
I suggest, you make a navigation method in your activity and switch/call between fragments from there.
Below is a small snippet:
In your container activity:
Fragment fragment;
public void navigateTo(Fragment newFragment,boolean addToBackStack) {
this.fragment = newFragment;
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.replace(R.id.fragment_container, newFragment);
if(addToBackStack)
ft.addToBackStack(fragment.getClass().getSimpleName());
ft.commit();
}
If you are going from Fragment1 to Fragment2 then in your Fragment1 do the following:
((YourContainerActivity) getActivity()).navigateTo(new Fragment2(),false); //if you want to add to back stack make 2nd argument true.

private void selectItem(int position) {
selectedPosition = position;
// update the main content by replacing fragments
fragment = null;
fragmentStack = new Stack<Fragment>();
switch (position) {
case 0:
fragment = new Fragment1();
break;
case 1:
fragment = new Fragment2();
break;
}
//redirect the screen
if (fragment != null) {
fragmentManager = getSupportFragmentManager();
redirectScreen(fragment);
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(title[position]);
mDrawerLayout.closeDrawer(mDrawerList);
}
}

Facing issue in calling fragment class from adapter class in android

I have to call a fragment class from baseAdapter class. I have created a method in main fragment class like this
public void switchContent(Fragment fragment) {
getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, new Reply_ozoneFragment()).commit();
}
and calling this method in adapter class like this.
holder.bt_reply.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
fragment.switchContent();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.frame_container, new Reply_ozoneFragment());
fragmentTransaction.commit();
/*Intent reintent = new Intent(context,Reply_ozoneFragment.class);
//reintent.putExtra("userid", S);
context.startActivity(reintent);
*/
}
});
but this is not working properly and my app crashes every time. Please tell me what mistake I am doing here.

remove fragment.switchContent(); from your adapter button onclick() method and change
FragmentManager fm = getFragmentManager();
to
FragmentManager fm = getActivity().getSupportFragmentManager()

Adding and removing fragment with same button from framelayout

I am new to android working first time on fragment.I am creating an app in which I want to add a fragment on frame layout.I am able to do this but now what I want is to remove the same fragment which i added by that same button click I tried but couldn't. here is my code.
public void onClick(View v) {
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
if(v.getId() == R.id.clickme){
if(getSupportFragmentManager().findFragmentById(R.layout.fragment_one) != null){
// getSupportFragmentManager().beginTransaction().remove(getSupportFragmentManager().findFragmentById(R.layout.fragment_one)).commit();
Fragment fragment = new FragmenOne();
fragmentManager.beginTransaction().remove(fragment).commit();
}else{
Fragment fragment = new FragmenOne();
// android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.my_frame, fragment)
.commit();
}
}
}

You need to do in this manner
Fragment f = fragmentManager.findFragmentById(R.id.my_frame);
if(f instanceof FragmenOne) {
FragmenOne oneFragment = (FragmenOne) f;
FragmentTransaction trans = manager.beginTransaction();
trans.remove(oneFragment);
trans.commit();
fragmentManager.popBackStack();
}else{
Fragment fragment = new FragmenOne();
fragmentManager.beginTransaction()
.replace(R.id.my_frame, fragment)
.commit();
}