CustomButton.java

public class CustomButton extends AppCompatButton {

    @Inject
    AnalyticsTools analyticsTools;

    private String analyticsScreenName;
    private String analyticsLabel;

    public AzimoButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(attrs);
    }

    //More view constructors here...

    private void init(AttributeSet attrs) {
        TypedArray ta = getContext().obtainStyledAttributes(attrs, R.styleable.CustomButton, 0, 0);
        try {
            analyticsLabel = ta.getString(R.styleable.CustomButton_analyticsLabel);
            analyticsScreenName = ta.getString(R.styleable.CustomButton_analyticsScreenName);
        } finally {
            ta.recycle();
        }
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        validateAnalyticsSettings();
    }

    //Crash early to make sure that you won't miss any button when labeling 
    private void validateAnalyticsSettings() throws RuntimeException {
        if (analyticsLabel == null) {
            throw new RuntimeException("Analytics label attribute is required");
        }
    }

    @Override
    public boolean performClick() {
        logButtonClick();
        return super.performClick();
    }

    private void logButtonClick() {
        BaseActivity activity = getActivity();
        if (activity != null) {
            analyticsScreenName = activity.getScreenNameForAnalytics();
        }
        analyticsTools.logButtonClick(analyticsScreenName, analyticsLabel);
    }

    /**
     * Unwrap Activity from possible ContextThemeWrapper
     */
    private BaseActivity getActivity() {
        Context context = getContext();
        while (context instanceof ContextWrapper) {
            if (context instanceof BaseActivity) {
                return (BaseActivity) context;
            }
            context = ((ContextWrapper) context).getBaseContext();
        }
        return null;
    }
}