Why are Log.d() and Log.v() not printing

Question

I have the following test code in my Activity:

@Override
public void onStart() {
    super.onStart();
    Log.e(CLASS_NAME, \"ERROR onStart()\");
    Log.w(C         


        

Answer 1

This started happening with me in Android Studio 3. I was getting old Log.v's printing, but when I added a new one nothing happened. Ditto with debugger breakpoints.

Cleaning the solution and restarting Android Studio worked for me, but there was a simpler solution.

Disable Instant Run. It seems that Instant Run doesn't recognise new Log.v's or breakpoints.

Along the way I also added Gradle-aware Make to my Run/Debug configuration for the main activity. I don't know whether that was necessary, but I'm keeping it. ([Main Menu] Run -> Edit Configurations...)