Android Sugar ORM在init上阻塞UI线程

我正在为我的android 5.1应用程序使用1.3.1版的Sugar ORM

今天，在安装我的应用程序后，我注意到Sugar ORM正在阻止UI线程进行初始化，时间大约为2.4秒

有没有办法在后台线程中完成这些工作以改进用户体验

04-07 20:14:42.179  10407-10407/com.sample.app I/Sugar﹕ on create
04-07 20:14:44.354  10407-10407/com.sample.app I/Sugar﹕ domain class
04-07 20:14:44.358  10407-10407/com.sample.app I/Sugar﹕ domain class
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04-07 20:14:44.432  10407-10407/com.sample.app I/Sugar﹕ domain class
04-07 20:14:44.506  10407-10407/com.sample.app I/Sugar﹕ create table
04-07 20:14:44.506  10407-10407/com.sample.app D/Sugar﹕ Fetching properties
04-07 20:14:44.507  10407-10407/com.sample.app I/Sugar﹕ creating table ARTICLE

---

正如您所建议的，在后台任务中进行数据库初始化是我想到的最简单的解决方案。 首先，我想你应该已经注意到，当你使用一个扩展SugarRecord的对象时，sugar的创建第一次开始了，所以我所做的就是在我的应用程序启动的一开始（当然是在后台）拉这个动作。我就是这样做的：

首先，我定义了一个对象，如下所示：

public class DBInit extends AsyncTask<Void,Void,Void> {
@Override
protected Void doInBackground(Void... params) {
        Offer.last(Offer.class);
        return null;
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash_screen);

    // Init the data base in a AsyncTask
    DBInit dbInit = new DBInit();
    dbInit.execute();
}

我希望您觉得这个解决方法足够有用

编辑：如果使用不带.last（）方法的版本，可以通过执行

Offer.listAll（Offer.class）

而不是

Offer.last（Offer.class）

来实现相同的功能。但是，我会避免这样做，因为最终可能会拉过存储在其中的数百或数千个对象。因此，我在项目中所做的是定义一个抽象类，并使我的对象从中继承，而不是从SugarRecord中继承，让我们来看一下：

public abstract class BaseSugarRecord extends SugarRecord{

    public static <T extends SugarRecord> T checkFor(Class<T> type, final String _id, int id){
        List<T> found = find(type, _id+" = ?", String.valueOf(id));
        return !found.isEmpty() ? found.get(0) : null;
    }

    public static <T extends SugarRecord> List<T> listAll(Class<T> type, final String _id, int id){
       return find(type, _id+" = ?", String.valueOf(id));
    }
}

这里我摘录了如何使自定义对象从这个抽象类继承：

public class Offer extends BaseSugarRecord {

    public final static String ID_OFFER = "id_offer";
    @SerializedName(ID_OFFER)
    private int idOffer;
    // ...

---

这似乎是一个功能：。欢迎任何变通方法…无变通方法，无bug修复->我切换到ActiveAndroid:

。最后一个

API不可用。我在用糖1。3@AdiyatMubarak当前位置他的意思是使用任何方法触发SugarORM。最好不要使用listAll（），因为这可能是一个繁重的操作。

public class Offer extends BaseSugarRecord {

    public final static String ID_OFFER = "id_offer";
    @SerializedName(ID_OFFER)
    private int idOffer;
    // ...