java - Robospice + 改造 + ORMLite

Question

我将 Robospice 与 Retrofit ans ORMLite 模块一起使用。改造部分工作良好。我有用于改造的城市模型:

城市.java:

public class City {
    public int city_id;
    public String name;

    @SuppressWarnings("serial")
    public static class List extends ArrayList<City> {
    }
}

我通过 GET 请求从服务器获取这个模型:

MyApi.java

public interface MyAPI {
    @GET("/cities")
    City.List getCities();
}

这部分通过调用这个方法工作正常:

getSpiceManager().execute(mRequestCity, "city", DurationInMillis.ONE_MINUTE, new ListCityRequestListener());

和听众:

public final class ListCityRequestListener implements RequestListener<City.List> {

    @Override
    public void onRequestFailure(SpiceException spiceException) {
        Toast.makeText(RegisterActivity.this, "failure", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRequestSuccess(final City.List result) {
        Toast.makeText(RegisterActivity.this, "success", Toast.LENGTH_SHORT).show();
        updateCities(result);
    }
}

此时我想从服务器下载一次城市列表，并通过 ORMLite 模块将该列表存储到 sqlitedb 中。我创建了 ORMLite 模型:

City.java

@DatabaseTable(tableName = "city")
public class City {
    public final static String DB_CITY_ID_FIELD_NAME = "id";
    public final static String DB_CITY_NAME_FIELD_NAME = "name";

    @DatabaseField(canBeNull =  false, dataType = DataType.INTEGER, columnName = DB_CITY_ID_FIELD_NAME)
    int id;

    @DatabaseField(canBeNull = false, dataType = DataType.STRING, columnName = DB_CITY_NAME_FIELD_NAME)
    private String name;

    public City() {

    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();

        sb.append("id = ").append(id);
        sb.append(", ").append("name = ").append(name);

        return sb.toString();
    }
}

我的 RetrofitSpiceService.java 看起来像这样:

public class RetrofitSpiceService extends RetrofitGsonSpiceService {

    private final static String BASE_URL = "http://example.com/api/v1";
    private final static UserFunctions userFunctions = new UserFunctions();

    @Override
    public CacheManager createCacheManager(Application application) throws CacheCreationException {
        CacheManager cacheManager = new CacheManager();
        List< Class< ? >> classCollection = new ArrayList< Class< ? >>();

        // add persisted classes to class collection
        classCollection.add( City.class );

        // init
        RoboSpiceDatabaseHelper databaseHelper = new RoboSpiceDatabaseHelper( application, "sample_database.db", 1 );
        InDatabaseObjectPersisterFactory inDatabaseObjectPersisterFactory = new InDatabaseObjectPersisterFactory( application, databaseHelper, classCollection );
        cacheManager.addPersister( inDatabaseObjectPersisterFactory );

        return cacheManager;
    }

    @Override
    protected Builder createRestAdapterBuilder() {
        Builder mBuilder = super.createRestAdapterBuilder();

        mBuilder.setRequestInterceptor(new RequestInterceptor() {
            @Override
            public void intercept(RequestFacade request) {
                if (userFunctions.isUserLoggedIn()) {
                    request.addHeader("Authorization", userFunctions.getToken());
                }
            }
        });

        return mBuilder;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        addRetrofitInterface(MyAPI.class);
    }

    @Override
    protected String getServerUrl() {
        return BASE_URL;
    }
}

我不明白如何从我的城市数据库中存储和读取数据？我需要如何更改 RetrofitSpiceService？我想通过 Retrofit 下载数据并通过 ORMLite 将其存储到数据库中。我的 CacheManager 是正确的，即可以正常工作吗？也许我误解了模块 Robospice-ORMLite 是如何工作的？

非常感谢!

Answer 1

当您使用缓存键和持续时间调用 execute() 时，Robospice 会将您的响应存储到数据库中。

getSpiceManager().execute(mRequestCity, "city", DurationInMillis.ONE_MINUTE, new ListCityRequestListener());

一分钟内所有后续请求都会从这个缓存中获取数据，然后进行网络调用。如果您只想从缓存中获取数据，请查看 getSpiceManager().getFromCache()方法。我想这就是您要找的。