java - using android layout and android id -

- 

view v=inflater.inflate(r.layout.fragment_b,container,false); view v = findviewbyid(r.id.fragb);

i want know when use

r.id.fragb

and when use 

r.layout.fragment_b.

can't use

r.id.fragb

in place of

r.layout.fragment_b

in first statement.

all references under r.layout refer layout files themselves. example, if define layout fragment in fragment_b.xml, r.layout.fragment_b way framework reference file.

references under r.id identifiers. identifiers views in layout, or generic identifiers create other purposes.

your layout xml might start root view has id, might not. layout xml can contain views many different ids. 2 not interchangeable.


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