我正在使用Robospice和Retrofit ans ORMLite模块。改造部分工作良好。我对改造城市模型:Robospice + Retrofit + ORMLite
City.java:
public class City {
public int city_id;
public String name;
@SuppressWarnings("serial")
public static class List extends ArrayList<City> {
}
}
我通过GET请求采取从服务器这种模式:
MyApi.java
public interface MyAPI {
@GET("/cities")
City.List getCities();
}
这部分通过调用此方法正常工作:
getSpiceManager().execute(mRequestCity, "city", DurationInMillis.ONE_MINUTE, new ListCityRequestListener());
和监听:
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);
}
}
在这个时候,我想从服务器下载一次城市名单,并通过ORMLite模块此列表保存到sqlitedb。我创建ORMLite型号:
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RetrofitSpiceService.java看起来是这样的:
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;
}
}
我不明白我怎么可以存储和从我的城市数据库读取数据?我如何需要更改RetrofitSpiceService?我想通过改装下载数据并通过ORMLite将其存储到数据库。我的CacheManager是正确的,即将正常工作?也许我误解了模块Robospice-ORMLite是如何工作的?
非常感谢!
这意味着我可以只使用缓存,没有sqlite?我认为这在用户关闭并再次打开应用程序时不起作用。在将来,我想获得时间戳,指示城市表在服务器上更改的时间。我会检查这个时间,如果它大于我在sqlite中的时间戳,我将再次从服务器下载数据。你能举一些例子如何一起使用Retrofit&ormlite吗?网络请求仅在Retrofit模块中需要。 – user3551221 2014-09-30 07:24:05
1.当你在createCacheManager()中传递它时,Robospice的缓存使用ORMLite。如果您强制关闭应用程序并再次打开它,数据仍将保存在缓存中。 2.您需要使用If-Modified-Since/Last-Modified缓存实施。所以如果数据没有修改,服务器返回304. 请看看Robospice文档,它涵盖了很多问题。 – 2014-09-30 09:29:28