Get Value of different field in fragment from the parent Activity

Question

I\'ve an addActivity hosting 5 fragments, on each fragments I\'ve some fields to fill.
I want to get the value of those fields from the addActivity

Answer 1

Do the following:

Create interface for communicating fragment to activity:

import android.widget.EditText;

public interface FormInterface {

    public void returnEditedEditText(EditText editText);

}

The create a base fragment that instantiates the interface and overrides method for communicating when the EditText has been modified. Make sure the Fragment also implements OnEditorActionListener :

import android.app.Activity;
import android.app.Fragment;
import android.util.Log;
import android.view.KeyEvent;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

public class FormFragment extends Fragment implements OnEditorActionListener {

    protected final String FRAGMENT_NAME = getClass().getName();

    protected FormInterface formInterface;

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        //ensure activity implements interface
        try {
            formInterface = (FormInterface) activity;
        } catch (ClassCastException ex) {
            String errorString = activity.toString() + " must implement FormInterface";
            Log.e(FRAGMENT_NAME, errorString);
            throw new ClassCastException(errorString);
        }
    }

    @Override
    public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
        if(actionId == EditorInfo.IME_ACTION_DONE)
            formInterface.returnEditedEditText((EditText) view);
        return true;
    }

 }

Then in make your other fragments extend the base fragment:

YOURFRAGMENT extends FormFragment {
    //FOR EACH EDIT TEXT DO THE FOLLOWING
    EDITTEXT.setOnEditorActionListener(this);
}

Then make sure your activity implements the custom interface:

import android.app.Activity;
import android.widget.EditText;

public class FormActivity extends Activity implements FormInterface {

    @Override
    public void returnEditedEditText(EditText editText) {

        String input = editText.getEditableText().toString();

        switch(editText.getId()) {
            case R.id.editText_FirstName:
                mFirstName = input;
                break;
            ...
        }
    }
}