Can the current value determine the logic value(0 or 1)?
It's not a very clear question, but on logic ICs, it's the input voltage that determines if that input is high or low.  The IC doesn't know or care what current is flowing from the previous IC's output.







simulate this circuit &ndash; Schematic created using CircuitLab

So in the little diagram above, pressing SW2 changes the current flowing out of BUF1, but BUF2 doesn't care.