How to create a button dynamically in android without extending Activity

Question

I have a class in android that extends Fragment. And I need to create a button dynamically. I can't use new Button(this). Because I'm not extending activity. How do I do this?

public class Tab2Fragment extends Fragment {

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


    LinearLayout theLayout =  (LinearLayout) inflater.inflate(R.layout.tab2, container, false);

    Context mFragmentContext=getActivity().getApplicationContext(); 
    Button btn=new Button(mFragmentContext);
    btn.setText("Hello Button");
    RelativeLayout.LayoutParams paramsd = new RelativeLayout.LayoutParams(150,30);
    paramsd.height = 600;
    paramsd.width = 60;
    btn.setLayoutParams(paramsd);
    addContentView(btn,paramsd);

I tried making a new activity and putting it in space of "this" but the app crashed. Where should i be passing the activity from? Sorry I'm kinda new to this. How do I know what the application context is? — jacosta
– jacosta, Commented Jul 16, 2012 at 16:04
its a fragment so I used this method LinearLayout theLayout = (LinearLayout) inflater.inflate(R.layout.tab2, container, false); I added it into my code — jacosta
– jacosta, Commented Jul 16, 2012 at 16:26

Padma Kumar · Accepted Answer · 2012-07-16 16:08:02Z

3

//try using this below code

sol1:

Button myButt=new Button(YourFragmentClass.this);

sol2:

Button myButt=new Button(getApplicationContext());

//you can also get context like this

 private Context mFragmentContext=getActivity().getApplicationContext();

answered Jul 16, 2012 at 16:08

Padma Kumar

20k17 gold badges77 silver badges131 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

jacosta Over a year ago

Ok I'm trying the private context method you posted, but how do i add the button to my view so it actually shows up in the app?

Padma Kumar Over a year ago

without posting your code do you want to do all your homework.

jacosta Over a year ago

alright i edited it and added my code, the method addContentView worked on a class where Activity was extended but not on my fragment class

Community · Accepted Answer · 2017-05-23 12:20:53Z

1

/* getActivity() will give you the Activity this fragment belongs
to, you can use this as 'Context' */

Button button = new Button(getActivity())

/* getView() will give you the root layout for this fragment 
(Relative, Linear or whatever you used in xml) and you must cast it
to a ViewGroup to access the getView() method*/

RelativeLayout.LayoutParams paramsd = new RelativeLayout.LayoutParams(150,30);
paramsd.height = 600;
paramsd.width = 60;

ViewGroup viewGroup = (ViewGroup) getView();
viewGroup.addView(button, paramsd);

See here for more info on getView(): Android add button to Fragment without id

Happy Coding...

edited May 23, 2017 at 12:20

CommunityBot

11 silver badge

answered Mar 28, 2014 at 13:49

Abimbola Esuruoso

4,2371 gold badge21 silver badges26 bronze badges

Collectives™ on Stack Overflow

How to create a button dynamically in android without extending Activity

2 Answers 2

3 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related