Android: Detect user inactivity / Detect (softkeyboard) keyboard input

I want to detect "user inactivity" in my Android app. To be more precise: I want to detect if the user has NOT done any interaction with my app (touching the screen, scrolling, input texts ...) for a specific time. Technically I use a timer that is reseted on each (user) interaction.

In my activity, I override the onUserInteraction method to detect interactions like scrolling, touching the screen ...

@Override
public void onUserInteraction(){
    resetInactiveTimer();
}

Unfortunately, onUserInteraction is not called when the user interacts with the soft keyboard. I think the reason is, that the soft keyboard is not part of my Activity.

For the edit texts in my app I use TextWatcher and the onTextChanged method which works fine. But my app also contain a WebView that loads arbitrary web pages. Of course some web pages could contain input fields and I do not know how 开发者_如何转开发to detect that the user interacts with the soft keyboard to edit those text fields.

Still interested in this?

Your activity implements KeyEvent.Callback, so you can override onKeyDown:

@Override
public boolean onKeyDown (int keyCode, KeyEvent event) {
    resetInactiveTimer();
    return false;
}

Alternatively, (in the most common circumstance) if the key is pressed with the cursor in an EditText or similar, you will need implement an OnKeyListener and use the onKey method to call resetInactiveTimer();