How to pass value from global variable application into fragment?

Question

How to pass value from global variable application into fragment? I got null value error message.

Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

Global Variable

public class Gl extends Application {

    private String token = "bla bla";

    public void setToken(String token){
        this.token = token;
    }

    public String getToken() {
        return token;
    }
}

Fragment

public class MyFragment extends Fragment {

    private String token;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        token = ((Gl) getActivity().getApplicationContext()).getToken();
    }

  /* .... */

}

When you debug does the Activity launch? Does Activity attach fragment using fragmentManager? — Pomagranite, Jan 21 '18 at 19:18

score 0 · Answer 1 · answered Jan 21 '18 at 19:05

0

Check your AndroidManifest.xml file for definition of your Gl class

<application
    android:name=".Gl"

everything else looks good ...

answered Jan 21 '18 at 19:05

Naveen Dew

1,295
11
19

your MyFragment onCreate() not inflating/returning any view, please check – Naveen Dew Jan 21 '18 at 19:19

score 0 · Answer 2 · answered Jan 21 '18 at 19:06

I think there is something wrong by default whit your intent. You should use different approach like to put the variable in res/string file and get it by

getString(R.string.you_string_id)

But if you want to pass some arguments to the fragment you ca do that as described here

score 0 · Answer 3 · answered Jan 21 '18 at 19:17

0

Firstly you must add G1 class to AndroidManifest.xml

<application android:name=".G1"
...
/>

And I advise you to use Dagger2 , for pass value into fragment.

answered Jan 21 '18 at 19:17

Anton Yaskiv

42
2

score 0 · Answer 4 · answered May 08 '18 at 11:12

0

Specify token of G1 class as public static

answered May 08 '18 at 11:12

akshay ambaliya

11
3

Can you provide some more context? – Nico Haase May 08 '18 at 11:29

How to pass value from global variable application into fragment?

4 Answers4