我在swift中有一个应用程序，我创建了一个类ApiRequest来处理我对API的所有调用，因此我在UI中没有任何逻辑，我只返回用于填充视图的对象。
我想在java中做同样的事情，但是据我所知，没有像swift那样的匿名函数或闭包，只有实现接口的匿名对象。所以我试图使用这些概念，凌空和可能的GSON库将我的swift类转换为java类，但我不确定如何完全这样做，或者即使它在java中有意义。< / p>
这是我的快速课程：
class ApiResponse {
var success: Bool = false
var message: String = ""
var data: AnyObject!
}
//The wrapper
class queryAPI {
var hostname = APP_DELEGATE.hostname
func requestAPI(url:String, params:String, completion: (ApiResponse) -> ()) {
let session = NSURLSession.sharedSession()
let urlStr = hostname+url
var request = NSMutableURLRequest(URL: NSURL(string:urlStr )!)
request.HTTPMethod = "POST"
request.HTTPBody = params.dataUsingEncoding(NSUTF8StringEncoding)
var out = NSString(data: request.HTTPBody!, encoding: NSUTF8StringEncoding)
request.addValue("XMLHTTPRequest", forHTTPHeaderField: "X-Requested-With")
request.addValue("KaliMessenger", forHTTPHeaderField: "User-Agent")
var task = session.dataTaskWithRequest(request){
(data, response, error) -> Void in
var res = ApiResponse();
if error != nil {
res.success = false
res.message = error.localizedDescription
res.data = nil;
println(error.localizedDescription)
}
else {
var error: NSError?
println("Performing request: "+urlStr)
if let jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &error) as? NSDictionary //return a dictionnary with a list of indexes (array)
{
res.success = jsonResult["success"] as! Bool;
if(res.success)
{
res.message = "";
res.data = jsonResult["data"]
}
else
{
res.message = jsonResult["msg"] as! String;
res.data = nil
}
} else {
//when we do not manage to get the result, we display the url called, what we have received, and set the response to false
var dataContent = NSString(data: data, encoding: NSASCIIStringEncoding);
println("Error decoding JSON: ")
println(dataContent)
res.message = "error decoding json response"
res.data = nil
res.success = false
}
}
//we return our items to the main thread
let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
dispatch_async(dispatch_get_global_queue(priority, 0)){
dispatch_async(dispatch_get_main_queue()){
completion(res)
}
}
}
task.resume()
}
//an example of a function using the wrapper
func conversationList(completion: ([ModelConversation]) -> ()) {
self.requestAPI("owapi/messenger/conversationList", params: "") { (res: ApiResponse) -> () in
var items = [ModelConversation]() //TODO error checking
if(res.success)
{
var data = res.data as! NSArray
for item in data{
let item = ModelConversation(data: item as! NSDictionary)
items.append(item)
}
}
completion(items)
}
}
}
然后我像这样调用控制器中的函数：
query.allUsers(String(self.first), completion: { (users:[ModelUser]) -> () in
self.users = users
self.collectionView.reloadData()
})
到目前为止我在java中的内容：
public class QueryAPI {
public class ApiResult
{
public Boolean success;
public String message;
public Object data;
}
public interface ApiResponse<ApiResult>
{
public void onCompletion(ApiResult result);
}
public void requestApi( String url, final ApiResponse<ModelConversation> completion )
{
JsonObjectRequest apiRequest = new JsonObjectRequest(Request.Method.GET, url, (JSONObject) null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response)
{
Log.v("Data: ", response.toString());
try {
Boolean success = response.getBoolean("success");
Log.v("Success: ", success.toString());
JSONArray data = response.getJSONArray("data");
Log.v("DataArray: ", data.toString());
ApiResult res = new ApiResult();
res.success = success;
res.data = data;
completion.onCompletion(res);
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}
);
}
}
任何建议，链接，提示或代码都会很棒！