Threaded's Eclectic Blog

To produce log message in Google Android is really quite easy.

At the top of the file in the imports section add: import android.util.Log;

And then in your code you add Log.d(TAG,message);

Where TAG and message are strings.

It is considered good form that the TAG is a constant for the class.

So I put something like this at the top of the class private static final String TAG = Foo.class.getName();

There are several levels of logging and in level order these are Log.v(), Log.d(), Log.i(), Log.w() and Log.e()

Where
v = verbose
d = debug
i = info
w = warning
e = error

The logging is performed by LogCat which can be accessed via the adb tool that comes with the Android developer kit.

tools/adb logcat will start logging at the INFO level as that is the default.

tools/adb logcat *:V will log everything at VERBOSE level.

tools/adb logcat Wibble:W will filter most things and only show those log statements with the tag Wibble at the WARNING level.

Labels: google android