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

I've faced also to the same issue. Even following the previous answers, I didn't find the way to show logs in the Logcat.

After many tries done on my own, here is the (other) way to get logs shown:

Just selecting "Show only selected application" in the combobox did the job. Priorly, it was "Firebase" which was selected.

Hopefully, you will see your logs ;-)

Answer 2

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...)

Answer 3

Android Studio filters lines that have already been logged but Log itself may filter some levels when logging. See Log.isLoggable:

The default level of any tag is set to INFO.

(However on many phone it is actually set to DEBUG or VERBOSE.)

Answer 4

Fix For meizu phone

Settings -> Accessibility -> Developer options -> advanced logging->set "Allow all"

For Meizu MX4(Flyme 6.1.0.0), M2(Flyme 6.1.0.0G), M5(Flyme 6.3.0.0G) :

Settings->Accessibility - > Developer Options -> Performance optimization -> Advanced logging -> set "Allow all"

Huawei, logcat not showing the log for my app?

For other phone search in "developers options": option "logging" and set "all".