Two InputConnection variables in InputMethodService?

I am trying to implement my own android IME. In InputMethodService.onStartInputView

I save the reference to InputConnection

, returned getCurrentInputConnection

for later use. And in the keyup event, I call InputConnection.commitText

to pass the text to the screen.

But I find that in some applications this function call has no effect (nothing appears on the screen) and the softkeyboard sdk sample works well. The only difference is what the sample uses getCurrentInputConnect

to capture the symbols. Also, the expression in my application is false

mCurrentInputConnection == Ime.getCurrentInputConnection()

      

        
        
        
      

    

There are two InputConnection elements in the IME source code, mInputConnection and mStartedInputConnection, and getCurrentInputConnection

can be returned as well.

I know I can call every time getCurrentInputConnection

, but I just want to avoid calling the function for a performance problem (because it will be called too often). So, is there any other approach for getting the correct InputConnection? (and what's the difference between them?)