Friday, May 29, 2015

Converting an activity to a Fragment in android

Earlier I developed an android application using the Activity. But now the trend is to develop the android application using the Fragments. So I thought of converting the Activity based android application to Fragment based Android application. Earlier I thought it’s very difficult to do it. But It’s very simple. Here are the steps  how we convert an activity to a Fragment:

1.     First we need to import the package: FragmentActivity of Support V4 app package:


2.     Change the extends Activity to extends Fragment. Eg:

public class HomeFragment extends Fragment{


3.     Add the method onCreateView and move everything from onCreate of Activity to onCreateView except super.onCreate() and setContentView() 

public View onCreateView(LayoutInflater inflater, ViewGroup parent,     Bundle savedInstanceState) {
            View v = null;
            v = inflater.inflate(R.layout.fragment_home, parent, false);
// Content of previous onCreate() here
    // ...
    // Don't use this method, it's handled by inflater.inflate() above :
    // setContentView(R.layout.fragment_home);
            return v;        

4.      Remove method onCreate(). 

5.      Everywhere you access the Activity with “this” or just something or “this.something” replace with super.getActivity(). or use the value saved in the onCreateView

Example : Intent i = getIntent();
becomes Intent i = super.getActivity().getIntent();

That’s it. Happy Coding…

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