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Show java.util.logging.Logger logs in logcat Android Studio

I need to watch socket.io-client-java logs in an Android studio trap. For example: https://github.com/socketio/socket.io-client-java/blob/master/src/main/java/io/socket/client/IO.java#L70

  • Why I do not see the output logger.fine(String.format("ignoring socket cache for %s", source)); in logcat?

  • the logger in the example is above the Fine level set to the message, but Android Studio logcat does not have this log level (only Verbose , Debug , Info , Warn , Error , Assert ). I misunderstand this discrepancy. Please explain this.

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OK, Logcat does not show it, because the default registrar level is information.

Here is a solution that works very well for me. I am debugging socket.io now in main action

  import io.socket.client.Manager; import io.socket.client.Socket; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); AndroidLoggingHandler.reset(new AndroidLoggingHandler()); java.util.logging.Logger.getLogger(Socket.class.getName()).setLevel(Level.FINEST); java.util.logging.Logger.getLogger(io.socket.engineio.client.Socket.class.getName()).setLevel(Level.FINEST); java.util.logging.Logger.getLogger(Manager.class.getName()).setLevel(Level.FINEST); }

Possible class of use

 import android.util.Log; import java.util.logging.*; public class AndroidLoggingHandler extends Handler { public static void reset(Handler rootHandler) { Logger rootLogger = LogManager.getLogManager().getLogger(""); Handler[] handlers = rootLogger.getHandlers(); for (Handler handler : handlers) { rootLogger.removeHandler(handler); } LogManager.getLogManager().getLogger("").addHandler(rootHandler); } @Override public void close() { } @Override public void flush() { } @Override public void publish(LogRecord record) { if (!super.isLoggable(record)) return; String name = record.getLoggerName(); int maxLength = 30; String tag = name.length() > maxLength ? name.substring(name.length() - maxLength) : name; try { int level = getAndroidLevel(record.getLevel()); Log.println(level, tag, record.getMessage()); if (record.getThrown() != null) { Log.println(level, tag, Log.getStackTraceString(record.getThrown())); } } catch (RuntimeException e) { Log.e("AndroidLoggingHandler", "Error logging message.", e); } } static int getAndroidLevel(Level level) { int value = level.intValue(); if (value >= 1000) { return Log.ERROR; } else if (value >= 900) { return Log.WARN; } else if (value >= 800) { return Log.INFO; } else { return Log.DEBUG; } } }

here is the original answer: fooobar.com/questions/269284 / ...

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