DejavooTerminal terminal = getTerminal();

terminal.setLogger(new IDejaPayLogger() {
    @Override
    public void v(String s, Object... objects) {
        Log.d("DejaPay", String.format(s, objects));
    }

    @Override
    public void v(Throwable throwable, String s, Object... objects) {
        Log.v("DejaPay", String.format(s, objects), throwable);
    }

    @Override
    public void d(String s, Object... objects) {
        Log.d("DejaPay", String.format(s, objects));
    }

    @Override
    public void d(Throwable throwable, String s, Object... objects) {
        Log.d("DejaPay", String.format(s, objects), throwable);
    }

    @Override
    public void w(String s, Object... objects) {
        Log.w("DejaPay", String.format(s, objects));
    }

    @Override
    public void w(Throwable throwable, String s, Object... objects) {
        Log.w("DejaPay", String.format(s, objects), throwable);
    }

    @Override
    public void e(String s, Object... objects) {
        Log.e("DejaPay", String.format(s, objects));
    }

    @Override
    public void e(Throwable throwable, String s, Object... objects) {
        Log.e("DejaPay", String.format(s, objects), throwable);
    }
});