Android replace the current fragment with another fragment

Question

I just started with fragment design for HoneyComb  I created two fragments  When i click  a button in the left side fragment  a new fragment is created in right side  Meanwhile when i click a button in the right fragment ie  DetialsFragment in my code below should be replaced by another fragment  main xml   lt  xml version  1 0  encoding  utf-8   gt   lt LinearLayout xmlns android  http   schemas android com apk res android  android layout width  match parent  android layout height  match parent  android orientation  horizontal   gt       lt fragment class  com fragment example Titles          android id    id titles  android layout weight  1          android layout width  0px          android layout height  match parent    gt       lt FrameLayout android id    id details  android layout weight  1          android layout width  0px          android layout height  match parent    gt    lt  LinearLayout gt    FragmentExample java  public class FragmentExample extends Activity       Called when the activity is first created          Override     public void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main             Titles java  public class Titles extends Fragment       public FragmentTransaction ft       Override     public View onCreateView LayoutInflater inflater          ViewGroup container  Bundle savedInstanceState            View v   inflater inflate R layout main1  null           Button button1    Button v findViewById R id button1           button1 setText  santhosh            button1 setOnClickListener new OnClickListener                     Override             public void onClick View arg0                       TODO Auto-generated method stub                  DetailsFragment details    DetailsFragment                              getFragmentManager   findFragmentById R id details                       if  details    null    details getShownIndex      1                               Make new fragment to show this selection                          details   DetailsFragment newInstance 1                               Execute a transaction  replacing any existing                            fragment with this one inside the frame                          ft                                   getFragmentManager   beginTransaction                            ft add R id details  details   detail                            ft setTransition                                  FragmentTransaction TRANSIT FRAGMENT FADE                           ft commit                                                             return v            DetailsFragment java  public class DetailsFragment extends Fragment                  Create a new instance of DetailsFragment  initialized to        show the text at  index               Titles title   new Titles        String   titles     Title1    Title2    Title3    Title4        public static DetailsFragment newInstance int index            DetailsFragment f   new DetailsFragment                Supply index input as an argument          Bundle args   new Bundle            args putInt  index   index           f setArguments args            return f             public int getShownIndex             return getArguments   getInt  index   0               Override     public View onCreateView LayoutInflater inflater          ViewGroup container  Bundle savedInstanceState            if  container    null                   Currently in a layout without a container  so no                reason to create our view              return null                    Button button   new Button getActivity             button setText  Next            button setOnClickListener new OnClickListener                   Override             public void onClick View v                       TODO Auto-generated method stub                                   return button

User · Answer

If you have a handle to an existing fragment you can just replace it with the fragment's ID.

Example in Kotlin:

fun aTestFuction() {
   val existingFragment = MyExistingFragment() //Get it from somewhere, this is a dirty example
   val newFragment = MyNewFragment()
   replaceFragment(existingFragment, newFragment, "myTag")
}

fun replaceFragment(existing: Fragment, new: Fragment, tag: String? = null) {
    supportFragmentManager.beginTransaction().replace(existing.id, new, tag).commit()
}

User · Answer

it s very simple how to replace with Fragment   DataFromDb changeActivity   new DataFromDb        FragmentTransaction transaction   getSupportFragmentManager   beginTransaction        transaction replace R id changeFrg  changeActivity       transaction commit

User · Answer

Then provided your button is showing and the click event is being fired you can call the following in your click event   final FragmentTransaction ft   getFragmentManager   beginTransaction     ft replace R id details  new NewFragmentToReplace     NewFragmentTag     ft commit       and if you want to go back to the DetailsFragment on clicking back ensure you add the above transaction to the back stack  i e    ft addToBackStack null     Or am I missing something  Alternatively some people suggest that your activity gets the click event for the button and it has responsibility for replacing the fragments in your details pane

User · Answer

Latest Stuff Okay  So this is a very old question and has great answers from that time  But a lot has changed since then  Now  in 2020  if you are working with Kotlin and want to change the fragment then you can do the following   Add Kotlin extension for Fragments to your project   In your app level build gradle file add the following  dependencies       def fragment version    quot 1 2 5 quot          Kotlin     implementation  quot androidx fragment fragment-ktx  fragment version quot         Testing Fragments in Isolation     debugImplementation  quot androidx fragment fragment-testing  fragment version quot      Then simple code to replace the fragment   In your activity supportFragmentManager commit       replace R id frame layout  YourFragment newInstance     quot Your TAG quot       addToBackStack null     References Check latest version of Fragment extension More on Fragments

User · Answer

Use android support v4 app for FragmentManager  amp  FragmentTransaction in your code  it has worked for me   DetailsFragment detailsFragment   new DetailsFragment    android support v4 app FragmentManager fragmentManager   getSupportFragmentManager    android support v4 app FragmentTransaction fragmentTransaction   fragmentManager beginTransaction    fragmentTransaction replace R id details detailsFragment   fragmentTransaction commit

User · Answer

You can try below code  it   s very easy method for push new fragment from old fragment   private int mContainerId  private FragmentTransaction fragmentTransaction  private FragmentManager fragmentManager  private final static String TAG    DashBoardActivity    public void replaceFragment Fragment fragment  String TAG         try           fragmentTransaction   fragmentManager beginTransaction            fragmentTransaction replace mContainerId  fragment  tag           fragmentTransaction addToBackStack tag           fragmentTransaction commitAllowingStateLoss           catch  Exception e               TODO  handle exception

[android] Android replace the current fragment with another fragment

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