Timber - Problem with creating a custom Timber Debug Tree class

Question

I'm trying to create a custom Debug Tree class to get the same result as the following:

I have followed this Stackoverflow answer:

Log method name and line number in Timber

But using that answer gives me two problems:

1. Implementing the custom Debug Tree class does not log anything when I use more than one method.

public class MyDebugTree extends Timber.DebugTree {     
    @Override 
    protected String createStackElementTag(StackTraceElement element) {
        return String.format("(%s:%s)#%s",
            element.getFileName(),
            element.getLineNumber(),
            element.getMethodName());
    } 
} 

public class BaseApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        if (BuildConfig.DEBUG) {
            Timber.plant(new MyDebugTree);
        }
    }
}

The above causes it to not log at all.

If I use only return element.getFileName(); it successfully logs that one error.

2. The second problem I'm having is that using a custom DebugTree class does not give me the same results as using err.getStackTrace()[0].getLineNumber().

 }, err -> {
     Timber.e("Method name: " + err);
     Timber.e("Method name: " + err.getStackTrace()[0].getMethodName());
}

The custom Debug Tree class does not display the name of the method I'm trying to log.

Why is it not logging when I use all three methods?

Also how can I get it to log like it would using

err.getStackTrace()[0].getMethodName()?

---

I'm using 'com.jakewharton.timber:timber:4.7.1'

Answer 1

You seem to be doing it right. I recreated your code in kotlin (programming language should not matter) and i was able to show my logs.

MyDebugTree.kt

class QueenlyDebugTree : Timber.DebugTree() {
    override fun createStackElementTag(element: StackTraceElement): String {
        return "(${element.fileName}:${element.lineNumber})#${element.methodName}"
    }
}

force log using an actual exception:

try {
    throw RuntimeException("Hello World")
} catch (e: Exception) {
    Timber.e(e)
}

i got a log:

So, from what i saw from your code, its most probably because you have a compact logcat view. To update your logcat view, follow these steps:

1. Make sure you have standard view selected

2. Configure standard view

3. Make sure Show tags is selected and tag column is at max(35)