Data Binding Observable

• BaseObservable 两种域改变通知UI刷新

@Bindable和notifyPropertyChanged(BR.xxx);通知相关的UI刷新，可视为局部刷新

    @Bindable
    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
        notifyPropertyChanged(BR.firstName);
    }

notifyChange();可视为和这个model相关的UI全部刷新

    public void setFired(boolean fired) {
        isFired = fired;
        notifyChange();
    }