I have an Android app that serves as a human-machine interface for a coffee brewer, and want to access data that it collects. I'm wondering how to do that. One possibility appears to be to use Jake Wharton's Timber logging library in conjunction with Crashlytics to display the data on the Crashlytics dashboard. If this approach is feasible, it would have the advantage of requiring adding only a couple of lines of code to the app. Is this a reasonable approach? Are there better ways to do what I want?

<attr name="handed" format="enum">
            <enum name="left" value="0"/>
            <enum name="right" value="1"/>
        </attr>

more completely, 
<declare-styleable name="OneHandLayout">
        <attr name="handed" format="enum">
            <enum name="left" value="0"/>
            <enum name="right" value="1"/>
        </attr>
    </declare-styleable>

And I define the value ("handed") in the layout XML...

 public OneHandLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        //this.DEBUG_DRAW = true;

        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.OneHandLayout);
        handed = a.getInt(R.styleable.OneHandLayout_handed, 0);
        //any other attributes to extract
        Log.i("handed", String.valueOf(handed));

        a.recycle();
    }

Okay, running now with this line:
        Log.i("hasValue?", String.valueOf(a.hasValue(R.styleable.OneHandLayout_handed)));

Okay... and yes, this is the complete opening tag:
<com.codesolutions.onehandkeyboard.OneHandLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/com.codesolutions.onehandkeyboard"
    android:paddingBottom="0dp"
    android:paddingLeft="0dp"
    android:paddingRight="0dp"
    android:paddingTop="0dp"
    tools:context="com.codesolutions.onehandkeyboard.KeyboardActivity"
    app:handed="right">

Something like this is what I'm trying to accomplish: