This is a logger with a small, extensible API which provides utility on top of Android's normal
I copy this class into all the little apps I make. I'm tired of doing it. Now it's a library.
Behavior is added through
Tree instances. You can install an instance by calling
Trees should be done as early as possible. The
onCreate of your application is
the most logical choice.
DebugTree implementation will automatically figure out from which class it's being called and
use that class name as its tag. Since the tags vary, it works really well when coupled with a log
reader like Pidcat.
There are no
Tree implementations installed by default because every time you log in production, a
Two easy steps:
- Install any
Treeinstances you want in the
onCreateof your application class.
Timber's static methods everywhere throughout your app.
Check out the sample app in
timber-sample/ to see it in action.
Timber ships with embedded lint rules to detect problems in your app.
TimberArgCount (Error) - Detects an incorrect number of arguments passed to a
Timbercall for the specified format string.
Example.java:35: Error: Wrong argument count, format string Hello %s %s! requires 2 but format call supplies 1 [TimberArgCount] Timber.d("Hello %s %s!", firstName); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TimberArgTypes (Error) - Detects arguments which are of the wrong type for the specified format string.
Example.java:35: Error: Wrong argument type for formatting argument '#0' in success = %b: conversion is 'b', received String (argument #2 in method call) [TimberArgTypes] Timber.d("success = %b", taskName); ~~~~~~~~
TimberTagLength (Error) - Detects the use of tags which are longer than Android's maximum length of 23.
Example.java:35: Error: The logging tag can be at most 23 characters, was 35 (TagNameThatIsReallyReallyReallyLong) [TimberTagLength] Timber.tag("TagNameThatIsReallyReallyReallyLong").d("Hello %s %s!", firstName, lastName); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
LogNotTimber (Warning) - Detects usages of Android's
Logthat should be using
Example.java:35: Warning: Using 'Log' instead of 'Timber' [LogNotTimber] Log.d("Greeting", "Hello " + firstName + " " + lastName + "!"); ~
StringFormatInTimber (Warning) - Detects
String.formatused inside of a
Timbercall. Timber handles string formatting automatically.
Example.java:35: Warning: Using 'String#format' inside of 'Timber' [StringFormatInTimber] Timber.d(String.format("Hello, %s %s", firstName, lastName)); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BinaryOperationInTimber (Warning) - Detects string concatenation inside of a
Timbercall. Timber handles string formatting automatically and should be preferred over manual concatenation.
Example.java:35: Warning: Replace String concatenation with Timber's string formatting [BinaryOperationInTimber] Timber.d("Hello " + firstName + " " + lastName + "!"); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TimberExceptionLogging (Warning) - Detects the use of null or empty messages, or using the exception message when logging an exception.
Example.java:35: Warning: Explicitly logging exception message is redundant [TimberExceptionLogging] Timber.d(e, e.getMessage()); ~~~~~~~~~~~~~~
Snapshots of the development version are available in Sonatype's
Copyright 2013 Jake Wharton Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.