call AsyncTask in Fragment from an Activity

Issue

in my application, i have main_activity with a FrameLayout, and a Fragment

public class Fragment1 extends Fragment {

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

   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment1, container, false);

    return view;
   }

   public class StartAsyncTask extends AsyncTask<Void,Void,Void>{

       @Override
       protected Void doInBackground(Void... voids) {
           Log.e("startAsyncTask", "start");
           return null;
       }
   }

}

I need to call the AsyncTask from the MainActivity, so i use:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    android.support.v4.app.FragmentTransaction fragmentTransaction =
            getSupportFragmentManager().beginTransaction();
    Fragment1 fragment1 = new Fragment1();
    fragmentTransaction.replace(R.id.fragment, fragment1).commit();
    new Fragment1.StartAsyncTask().execute();
}

but it dosn't work. new Fragment1.StartAsyncTask().execute(); is in red with (is not enclosing class) error.

Solution

You Can Do Like this, From your MainActivity You can Call your AsyncTask indirectly

ublic class MainActivity extends AppCompatActivity {

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

    android.support.v4.app.FragmentTransaction fragmentTransaction =
            getSupportFragmentManager().beginTransaction();
    BlankFragment fragment1 = new BlankFragment();
    fragmentTransaction.replace(R.id.activity_main,    fragment1).commit();
    fragment1.startASycnc();
    }
}

And Your Fragment Looks Like This:

public class BlankFragment extends Fragment {


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


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

public void startASycnc() {
    new StartAsyncTask().execute();
}

public class StartAsyncTask extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void... voids) {
        Log.e("startAsyncTask", "start");
        return null;
       }
    }
   }

Answered By - Rakshith Kumar