Android & Java simple Code

Question

I Wonder what is and does (this) in this code:

Button btn = new Button(this);

MByD · Accepted Answer · 2011-11-27 08:14:19Z

5

this refers to the current object, which is probably the Activity. Activity extends Context, and it is passed as Context to the Button constructor.

edited Nov 27, 2011 at 8:14

answered Nov 27, 2011 at 8:06

MByD

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6 Comments

wagashi Over a year ago

I see. Would it be fine if I omit (this)?

MByD Over a year ago

No! you need to pass the context to the Button constructor

wagashi Over a year ago

Ok. May I write other words in parenthesis? If yes, what would they mean?

MByD Over a year ago

I think it is better that you explain the whole problem (in a new question) please add relevant code, and the error that you have. This way is kind of cryptic.

wagashi Over a year ago

Oh, no, I don't program anything with Java right now. When I read such code, and I don't find explanation on it, I just wonder what it is like and what is its equivalent in Objective-C?

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Dmytro Danylyk · Accepted Answer · 2011-11-27 08:06:28Z

4

Its a reference to the Context

answered Nov 27, 2011 at 8:06

Dmytro Danylyk

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1 Comment

wagashi Over a year ago

I see. Would it be fine if I omit (this)?

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