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LumberJack - Simple Android Logger

LumberJack is a simple logging library for Android which allows you to send log to Logcat, File System or your server (Coming soon). It's easy to start and ever easier to customise.


  • Logging to Logcat or File system or both
  • Easy customisation
  • Log only when a specified filter is satisfied
  • Can programmatically disable the log

Planned feature

  • More Customization support
  • Sending Log data to a custom server
  • Emailing Log file


LumberJack is hosted at The instructions are as follows -
Step 1. Add the JitPack repository to your build file. Add it in your root build.gradle at the end of repositories:

allprojects {
	    repositories {
	    	maven { url "" }

Step 2. Add the dependency

dependencies {
        compile 'com.github.Abhi347:LumberJack:0.1.0'


Just use it as you are using Log class. For eg. instead of calling Log.d(), call LumberJack.d()

LumberJack.v(tag, message);
LumberJack.d(tag, message);
LumberJack.i(tag, message);
LumberJack.w(tag, message);
LumberJack.e(tag, message);

Starting from 0.1.0 instead of LumberJack, you can also use LJ class as an alias. This can be done with all the LumberJack methods.

LJ.v(tag, message);
LJ.d(tag, message);
LJ.i(tag, message);
LJ.w(tag, message);
LJ.e(tag, message);

You can choose to skip the tag. When you do that a default tag is chosen. The current default tag is LumberJack.

LumberJack.v(message); //or LJ.v(message)
LumberJack.d(message); //or LJ.d(message)
LumberJack.i(message); //or LJ.i(message)
LumberJack.w(message); //or LJ.w(message)
LumberJack.e(message); //or LJ.e(message)

You can set Log Filtering by choosing the required Log Level -


Or you can choose to disable all logging


Advanced Usage

The default logging is done to Logcat, you can choose to Log in a file. Please note that Logging to server is not implemented yet. First you'll have to add the required permissions in your app's AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

From Android 6.0 (API level 23), you'll also need to get Runtime Permissions for WRITE_EXTERNAL_STORAGE permission.

The next step is to change the log type in onCreate() method of your (Or anywhere you want to change the Log Type)


Or if you want to have multiple LogType, you can pass an array.

LumberJack.setLogTypes(new LogType[]{LogType.Logcat, LogType.File});

Although a default file path will be chosen in your External Storage, Public Document Directory or your SD card, depending upon which version of Android you're running; it's entirely possible to change the path or just the name of the logging file. (Provided that you have permissions to write at that path).


You can change the default Tag to be chosen (when a tag is not supplied with logging method)

LumberJack.setDefaultTag("Default Tag");

For more usage, please check the example module (app module) in the source.


Feel free to report bugs, feedback or even suggest new features. I'd love to make it a great library.




LumberJack is not a production ready library (We haven't reached 1.0.0 yet) and thus you should not use it in a production ready code. Please read the license term carefully before including it in your projects.

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