CODEWITHSUNDEEP
androidandroid-layoutandroid-fragments
user3997016
user3997016

Reputation:

How to access fragment variable into main activity class

I have 1 main activity class and 1 fragment class:

I want to access variable of fragment class into my main activity class:

Myfragment class:

public class DemoFragment extends Fragment {

Public String mydata="hello";
.. //other code
}

Mainactivity class:

public class MainActivity extends ActionBarActivity {

   ..//other code
   DemoFragment df;

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;

        df = new DemoFragment();

        String newdata = df.mydata; //access from fragment but it shows null

    }

}

So how can i access fragment class variable values into main activity?

Upvotes: 4

Views: 10049

Answers (2)

Kalininskaya
Kalininskaya

Reputation: 138

In your fragment create

(a) Two fields:

listener mCallback;
Activity mActivity;

(b) Interface:

interface mydataBack(){
   public void bringBackString(String stringSentBack);
}

(c) Method

@Override
        public void onAttach(Activity activity) {
            mActivity=activity;
            super.onAttach(activity);
        mCallback = (listener) mActivity;
        }`

Then in the Fragment call the method bringBackString(String) when you wish to send back the string.

In your mainactivity:

(a) add in the "implements.. ...listener" in the class declaration

public class MainActivity extends ActionBarActivity implements DemoFragment.listener {  etc   and

(b) implement the interface method:

public void bringBackString(String stringBroughtBack){
....  do something with the string
}

Upvotes: 6

Neeraj Sharma
Neeraj Sharma

Reputation: 191

you have yo use
public static String mydata = "hello " and then get it in activity by using df.mydata

Upvotes: -2

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