Pass data to fragment edittext from activity

Question

Before you start answering i tried sharing data using sharedpreferences ... i tried bundle thing but still having null values and application crushes, my application is a draw menu when you click on listview item it brings a fragment in front where i have several edittext textviews , when i click on a edittext to change text it works perfect , the problem is that the edittext is initialy blank and it must load data from the main activity and this where i got NULL

[MainActivity ] onCreate method

EditText     editus_ername = (EditText) findViewById(R.id.editUserName);
            editus_ername.setText("Username");

[fragment class]

EditText editus_ername;

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

        View rootView = inflater.inflate(R.layout.fragment_whats_hot, container, false);

            editus_ername = (EditText)getActivity().findViewById(R.id.editUserName);


        return rootView;


    }




12-14 12:32:48.699: E/AndroidRuntime(1517): FATAL EXCEPTION: main
12-14 12:32:48.699: E/AndroidRuntime(1517): java.lang.NullPointerException
12-14 12:32:48.699: E/AndroidRuntime(1517):     at info.androidhive.slidingmenu.WhatsHotFragment.onCreateView(WhatsHotFragment.java:40)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.Fragment.performCreateView(Fragment.java:1695)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.BackStackRecord.run(BackStackRecord.java:682)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.os.Handler.handleCallback(Handler.java:725)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.os.Handler.dispatchMessage(Handler.java:92)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.os.Looper.loop(Looper.java:137)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at android.app.ActivityThread.main(ActivityThread.java:5041)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at java.lang.reflect.Method.invokeNative(Native Method)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at java.lang.reflect.Method.invoke(Method.java:511)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-14 12:32:48.699: E/AndroidRuntime(1517):     at dalvik.system.NativeStart.main(Native Method)

I don't know if I understood you. You are trying to pass data from an edit text in your activity to be shown in an edit text in your fragment ? — Abed Elaziz Shehadeh, Dec 14 '14 at 12:19
no accessing an edit text located at fragment layout , but i need to manipulate its value, the data i need to insert are located inside the main activity got it now? — user1642036, Dec 14 '14 at 12:23
no not really, so there is an activity with an edit text, you want to pass that edittext's value and show it in another edittext that is located inside the fragment, is that right ? — Abed Elaziz Shehadeh, Dec 14 '14 at 12:33
i have a MainActivity , i have a fragment class and fragment layout. i have edittext inthe fragment layout it's empty . i want to assign it a value when i call the fragment from the MainActivity .i hope you got it — user1642036, Dec 14 '14 at 12:35

Abed Elaziz Shehadeh · Answer 1 · 2014-12-14T12:57:52.717

1

you are calling the edittext using getactivity, change this like;

 editus_ername = (EditText)getActivity().findViewById(R.id.editUserName);

with;

 editus_ername = (EditText)rootView.findViewById(R.id.editUserName);

and if you want to pass values from your activity to the fragment, in Activity.java use;

Bundle bundle = new Bundle();
bundle.putString("value", value);
fragment.setArguments(bundle);

and in fragment.java use;

value= getArguments().getString("value");

edited Dec 14 '14 at 12:57

answered Dec 14 '14 at 12:44

Abed Elaziz Shehadeh

302
3
14

thank you for the help i just changed the getActivity() with rootView (or simply the view ) and it works – user1642036 Dec 14 '14 at 12:55

score 0 · Answer 2 · answered Dec 14 '14 at 12:38

0

Inside your fragment class, if the EditText is located in your R.layout.fragment_whats_hot layout, so do this instead :

editus_ername = (EditText) rootView.findViewById(R.id.editUserName);

And if you want to pass data to your fragment class, from your main activity:

You can use arguments
Or create a method inside your fragment :

public void test(int value) { // do stuff }

And call this method inside main activity.

Here is a link from the doc

answered Dec 14 '14 at 12:38

S.Thiongane

6,883
3
37
52

i tried the bundle method i always get null values when declare editus_ername = (EditText) rootView.findViewById(R.id.editUserName); – user1642036 Dec 14 '14 at 12:40
that means that your edit text is not defined inside this layout. Paste your layout's content so ! – S.Thiongane Dec 14 '14 at 12:46

score -2 · Accepted Answer · answered Dec 14 '14 at 12:24

-2

try send your String by fragment constructor or a new public method.

for example by constructor:

Fragment Class:

String _userName;
EditText editus_ername;

public FragmentClassName(String userName){
_userName = userName;
}



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

        View rootView = inflater.inflate(R.layout.fragment_whats_hot, container, false);

            editus_ername = (EditText)getActivity().findViewById(R.id.editUserName);

            editus_ername.setText(_userName);

        return rootView;


    }

MainActivity:

new FragmentClassName("Username");

answered Dec 14 '14 at 12:24

Hamidreza Samadi

637
1
7
24

can you post your Log? – Hamidreza Samadi Dec 14 '14 at 12:29
[fragments need a empty constructor](http://stackoverflow.com/questions/10450348/do-fragments-really-need-an-empty-constructor) – S.Thiongane Dec 14 '14 at 12:47
1

well it worked for me , but change (EditText)getActivity().findViewById( ); with (EditText)view.findViewById( ); – user1642036 Dec 14 '14 at 12:54

Pass data to fragment edittext from activity

3 Answers3