Add new textview in fragment after click on button in another fragment

Add new textview in fragment after click on button in another fragment

By : Clarke West
Date : November 18 2020, 03:01 PM
seems to work fine I managed to make it work with TinyDB, which can store string arraylist as SharedPreferences.
This is what I have in fragment with button
code :
TinyDB tinydb=new TinyDB(getActivity().getApplicationContext());

    incometemp = edttxt.getText().toString();
    mylist= tinydb.getListString("income");
    mylist.add(incometemp );
    tinydb.putListString("income", mylist);
TinyDB tinydb;
    ArrayList<String> mylist = new ArrayList<>();

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_home, container, false);
        tinydb = new TinyDB(getActivity().getApplicationContext());
        mylist = tinydb.getListString("income");
        LinearLayout m_ll = (LinearLayout) view.findViewById(R.id.home);

        for (int i=0;i<mylist.size();i++) {

        return m_ll;

    private TextView createNewTextView(String text) {
        final LinearLayoutCompat.LayoutParams lparams = new LinearLayoutCompat.LayoutParams(LinearLayoutCompat.LayoutParams.WRAP_CONTENT, LinearLayoutCompat.LayoutParams.WRAP_CONTENT);
        final TextView textView = new TextView(getActivity());
        textView.setText("New text: " + text);
        return textView;

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update TextView in fragment A when clicking button in fragment B

update TextView in fragment A when clicking button in fragment B

By : Brent Behling
Date : March 29 2020, 07:55 AM
wish help you to fix your issue You can define an interface in Fragment B and implement it on the MainActivity. Then on the callback method (onClickOnB in this case) set the text on the TextView. You should obtain a reference of the TextView in the Activity's onCreate() after setContentView(). This works because Fragment A is static. Otherwise, you can create a public method inside Fragment A so you can set the text from inside the callback by getting a reference of Fragment A and calling such method.
Fragment B
code :
public class FragmentB extends Fragment implements onClickListener{
ClickOnB listener;
public void setOnFragmentBClickListener(ClickOnB listener){
this.listener = listener;



public void onClick(View v){
//stringMessage is a `String` you will pass to `Fragment` A to update its `TextView`

interface ClickOnB{
public void onClickOnB(String message);

public class MainActivity extends Activity implements ClickOnB{
protected onCreate(Bundle savedInstanceState){

//Get a reference of `Fragment` B somewhere in your code after you added it dynamically and set the listener.


public void onClickOnB(String message){

//Set the text to the `TextView` here (I am assuming you get a reference of the `TextView` in onCreate() after inflating your layout.


How to change a TextView Fragment by a button located on the ActionBar (In the main fragment)

How to change a TextView Fragment by a button located on the ActionBar (In the main fragment)

By : ntheorist
Date : March 29 2020, 07:55 AM
it fixes the issue You need to keep a reference of the InfoInstalacionFragment4 instance you are using in the pager within the activity , so you can access it when the user pressed on the menu item.
The way you keep the reference depends on where the ViewPager is located. If it is within the activity , make a field in the activity and assign the new InfoInstalacionFragment4 to it.
How can I update the TextView in Fragment when I click in a button?

How can I update the TextView in Fragment when I click in a button?

By : jbyauk
Date : March 29 2020, 07:55 AM
will be helpful for those in need You can do it easily by using interface. Do something like this in your activity
code :
public class YourActivity extends AppCompatActivity{
    FragmentCommunicator fragmentCommunicator;

    protected void onCreate(Bundle savedInstanceState) {
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {




    public void passVal(FragmentCommunicator fragmentCommunicator) {
        this.fragmentCommunicator = fragmentCommunicator;



public interface FragmentCommunicator {
   public void changeText(String textVal);
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup  container, @Nullable Bundle savedInstanceState) {
    final View view = inflater.inflate(R.layout.activity_fragment1, container, false)
    ((YourActivity) getActivity()).passVal(new FragmentCommunicator() {
        public void changeText(String textVal) {  
               TextView frv = (TextView) view.findViewById(R.id.msgStatusPorta);
    return view;
Calling fragment after recieved retrofit response (textview and button are null inside fragment)

Calling fragment after recieved retrofit response (textview and button are null inside fragment)

By : Daniel Hanley
Date : March 29 2020, 07:55 AM
Hope that helps I know my problem description does not point to the real problem that I found but still I will post it since maybe it will help someone. I my case it was problem in xml file I just removed android:fillViewport="true" or set it to false and it works.
transfer data from fragment A -> fragment B - > fragment C. When user click Back button, I want to return to fragm

transfer data from fragment A -> fragment B - > fragment C. When user click Back button, I want to return to fragm

By : fabio g
Date : March 29 2020, 07:55 AM
With these it helps I'm a newbie in android developer. I have a question about transfer with 3 fragments. , Here is a sample idea how to achieve communication.
code :
 // activity classs
 public class SampleActivity extends Activity implements    OnFragmentChangeListener {
 OnBackPressListener  dataFragment;
 public void onCreate(bundle){

      android.app.FragmentManager fragmentManager=getFragmentManager();

    android.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    dataFragment = new DataFragment();
  public void OnFragmentChange(Bundle bundle){
  //here you go.
  // write code to load new fragment with same idea. now you have bundle do what you want.

public void onBackPressed() {
 // you can call this method from any click event, This just an sample idea.

 // interface to communicate with fragment
 public interface OnFragmentChangeListener {
     public void OnFragmentChange()
 // fragment class
public class DataFragment extends Fragment implements OnBackPressListener {

 OnFragmentChangeListener onFragmentChangeListener;

public void onCreate(Bundle savedInstanceState) {
 onFragmentChangeListener=(OnFragmentChangeListener) getActivity();


public void OnActivityBackPress() {
 // pass you data to activity for loading new fragment or to refresh data.
 Bundle bundle= new Bundle();



// interface behave like mediator 
public interface OnBackPressListener {

public void OnActivtiyBackPress();
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