Android studio fragments

Grace — Sat, 19 Oct 2019 22:29:53 +0000

I really need help for my HW, I'm not good with java but I need to pass this class to graduate. How do I send input text from an EditText (in FragmentOne) to a TextView (in FragmentTwo)? Also, "transfer" the color of a button (FragmentOne) to an ImageView (FragmentTwo), how could I do that?

In summary, I need it to show the text I wrote in FragmentTwo when I click a button and the ImageView should change color depending wich button I clicked.

I tried watching tutorials and reading answers but I don't understand what to do, I know how to do with if they were normal classes but with fragments I have no idea, any help I can get I would be extremely thankful!

Thanks for reading!

Main Activity

public class MainActivity extends AppCompatActivity implements
FragmentOne.OnFragmentInteractionListener,
FragmentTwo.OnFragmentInteractionListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction =
fragmentManager.beginTransaction();
FragmentOne fragment = FragmentOne.newInstance("HOLA", 0);
fragmentTransaction.add(R.id.fragmentOne, fragment);
fragmentTransaction.commit();
}
@Override
public void onFragmentInteraction(Uri uri) {

}

@Override
public void onFragmentInteraction(String message, int colorid) {
    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction =
            fragmentManager.beginTransaction();
    FragmentTwo fragment = FragmentTwo.newInstance(message, colorid);
    fragmentTransaction.replace(R.id.fragmentTwo, fragment);
    fragmentTransaction.commit();
}

}

FragmentOne

public class FragmentOne extends Fragment {

EditText editText;
Button buttonFragmentOne;
Button button;
Button button2;
private ImageView imageView;
private int colorid;

private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";

private String mParam1;
private int mParam2;

private OnFragmentInteractionListener mListener;

public FragmentOne() {
    // Required empty public constructor
}

public static FragmentOne newInstance(String param1, int param2) {
    FragmentOne fragment = new FragmentOne();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, param1);
    args.putInt(ARG_PARAM2, param2);
    fragment.setArguments(args);
    return fragment;
}
private void changeColor(){
    imageView.setColorFilter(ContextCompat.getColor(getContext(), colorid));
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getInt(ARG_PARAM2);
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_fragment_one, container, false);
    editText= rootView.findViewById(R.id.editText);
    button = rootView.findViewById(R.id.button2);
    imageView = rootView.findViewById(R.id.imageView);


    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            colorid = android.R.color.holo_red_dark;
            changeColor();
        }
    });
    button2 = rootView.findViewById(R.id.button3);
    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            colorid = android.R.color.holo_orange_dark;
            changeColor();

        }
    });

    buttonFragmentOne = rootView.findViewById(R.id.buttonFragmentOne);
    buttonFragmentOne.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            onButtonPressed(null);
        }
    });
    // Inflate the layout for this fragment
    return rootView;
}

// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
    if (mListener != null) {
        mListener.onFragmentInteraction(editText.getText().toString(), colorid);
    }
}

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    if (context instanceof OnFragmentInteractionListener) {
        mListener = (OnFragmentInteractionListener) context;
    } else {
        throw new RuntimeException(context.toString()
                + " must implement OnFragmentInteractionListener");
    }
}


@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}

public interface OnFragmentInteractionListener {
    // TODO: Update argument type and name
    void onFragmentInteraction(String message, int colorid);
}

Fragment Two

public class FragmentTwo extends Fragment {

TextView textView;


private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";

private String mParam1;
private int mParam2;

private OnFragmentInteractionListener mListener;

public FragmentTwo() {
    // Required empty public constructor
}

public static FragmentTwo newInstance(String param1, int param2) {
    FragmentTwo fragment = new FragmentTwo();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, param1);
    args.putInt(ARG_PARAM2, param2);
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getInt(ARG_PARAM2);
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_fragment_two, container,
            false);
}


// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
    if (mListener != null) {
        mListener.onFragmentInteraction(uri);
    }
}

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    if (context instanceof OnFragmentInteractionListener) {
        mListener = (OnFragmentInteractionListener) context;
    } else {
        throw new RuntimeException(context.toString()
                + " must implement OnFragmentInteractionListener");
    }
}

@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}

public interface OnFragmentInteractionListener {
    // TODO: Update argument type and name
    void onFragmentInteraction(Uri uri);
}

}

DEV Community: Grace

Android studio fragments