Is urine infection as bladder infection. that's what i'm asking?

Same: Yes, a urine infection can be synonymous with a bladder infection.

Interchangeable: Yes, a UTI is a bladder infection by common use. If either progresses, can become a 'kidney infection' or pyelonephritis.

Cystitis.: Urine infection is a misnomer - should be "urinary tract infection" which is often the same as a bladder infection, but could of course include other parts of the urinary tract as well. Cystitis or simple cystitis is another way to say bladder infection.