how to start a new activity from anther activity ... in android?

i want to start a new activity from ab activity that (extends from Linearlayout) .. but this code is not right

Intent i = new Intent(SearchResultForm.this, MainActivity.class);
startActivity(i);

... ...

public class SearchResultForm extends LinearLayout{ ...

and i get this error ..

No enclosing i开发者_开发知识库nstance of the type SearchResultForm is accessible in scope

how can i do it ?

Just guessing since I can't see the rest of your code, but try:

Intent i = new Intent(this, MainActivity.class);
startActivity(i);

Try this:

Intent i = new Intent(this, MainActivity.getPackageName());
startActivity(i);

If this code is inside an activity's method, just pass this as the first parameter.