Error No suitable method found for add(int, Fragment)

Question

I was trying to inflate a fragment in an Activity and here is the code.

public class DetailActivity extends AppCompatActivity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_detail);
            if (savedInstanceState == null) {
                getSupportFragmentManager().beginTransaction()
                        .add(R.id.container2, new DetailFragment()) 
                        .commit();    //Line with Error
            }
        }


        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.detail, menu);
            return true;
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
            int id = item.getItemId();

            //noinspection SimplifiableIfStatement
            if (id == R.id.action_refresh) {
                return true;
            }

            return super.onOptionsItemSelected(item);
        }
    }

And here is my DetailFragment class

/**
 * A placeholder fragment containing a simple view.
 */
public class DetailFragment extends Fragment {

    public DetailFragment() {
    }

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

        View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
        return rootView;
    }
}

Here goes the layout for fragment_detail

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
    android:textSize="18sp"
    android:id="@+id/fragment_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />
</LinearLayout>

The error I am facing is cannot resolve method 'add(int,com.example...DetailFragment)'. As, I am beginner to android, please also guide me on how should I go about, tackling such type of errors.

You've got the wrong `Fragment` class imported for `DetailFragment`. It should be `android.support.v4.app Fragment`. — Mike M., May 26 '16 at 17:28
Possible duplicate of [Android: Adding a simple Fragment](http://stackoverflow.com/questions/25744681/android-adding-a-simple-fragment) — Mike M., May 26 '16 at 17:30
Look at the `import` statements in your `DetailFragment` class. The one that says `import android.app.Fragment;` should be `import android.support.v4.app.Fragment;` instead. — Mike M., May 26 '16 at 17:30

score 9 · Accepted Answer · answered May 26 '16 at 17:31

9

Your DetailFragment need to extends from android.support.v4.app.Fragment instead of Fragment. Something like this

public class DetailFragment extends android.support.v4.app.Fragment {

 ......
}

answered May 26 '16 at 17:31

Masum

4,879
2
23
28

But I have another doubt. – Panda May 26 '16 at 17:34
Where is your doubt? – Masum May 26 '16 at 17:36
How could I have figured it out, without having it being posted on stack ? – Panda May 26 '16 at 17:37
change add() method to replace() – Masum May 26 '16 at 17:38
That's not my answer. – Panda May 26 '16 at 17:39
Incase, if I face these types of error in future, how should I go about tackling rhem? – Panda May 26 '16 at 17:58
Dont worry about it you will get updated answer from many threads. By the way if answer help you please accept the answer :) – Masum May 26 '16 at 18:00

score 0 · Answer 2 · edited Dec 19 '18 at 12:40

0

Make sure your DetailFragment uses the fragment from the version 4 support library and import the library below into your fragment class. The problem is that you are using android.app.fragment instead of android.support.v4.app.Fragment.

import android.support.v4.app.Fragment;

public class DetailFragment extends Fragment{

}

edited Dec 19 '18 at 12:40

Milad Bahmanabadi

946
11
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answered Dec 19 '18 at 11:23

ali sampson

321
4
7

Error No suitable method found for add(int, Fragment)

2 Answers2