我正在尝试使用Retrofit实现Fetch数据列表，它不起作用，它显示空白屏幕，我无法获取数据，我的Json响应如下
[
{
"code": 1,
"message": "listed!",
"totalrecord": 2,
"result": [
{
"FieldTypeID": "2",
"Name": "Marketing"
},
{
"FieldTypeID": "60",
"Name": "Designing"
},
{
"FieldTypeID": "61",
"Name": "SEO"
},
{
"FieldTypeID": "78",
"Name": "Mobile App Development"
}
]
}
]
MainActivity.java
public class MainActivity extends ListActivity {
ArrayList<Result> flowerList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// final RestAdapter restadapter = new RestAdapter.Builder().setEndpoint("http://services.hanselandpetal.com").build();
final RestAdapter restadapter = new RestAdapter.Builder().setEndpoint(BASE_URL).build();
api flowerapi = restadapter.create(api.class);
flowerapi.getData(new Callback<ArrayList<Result>>() {
@Override
public void success(ArrayList<Result> flowers, Response response) {
flowerList = flowers;
Log.d("ArrayList:: :: :::", String.valueOf(flowerList.size()));
adapter adapt = new adapter(getApplicationContext(), R.layout.item_file, flowerList);
//ListView listView = (ListView) findViewById(R.id.list);
setListAdapter(adapt);
}
@Override
public void failure(RetrofitError error) {
Toast.makeText(getApplicationContext(), "Failed", Toast.LENGTH_SHORT).show();
}
});
}
接口是api.java
public interface api {
// @GET("/feeds/flowers.json")
@GET("/GetUserGroupList")
public void getData(Callback<ArrayList<Result>> response);
}
Result.Java
public class Result {
@SerializedName("FieldTypeID")
@Expose
private String FieldTypeID;
@SerializedName("Name")
@Expose
private String Name;
/**
*
* @return
* The FieldTypeID
*/
public String getFieldTypeID() {
return FieldTypeID;
}
/**
*
* @param FieldTypeID
* The FieldTypeID
*/
public void setFieldTypeID(String FieldTypeID) {
this.FieldTypeID = FieldTypeID;
}
/**
*
* @return
* The Name
*/
public String getName() {
return Name;
}
/**
*
* @param Name
* The Name
*/
public void setName(String Name) {
this.Name = Name;
}
}
Flower.java
public class Flower {
@SerializedName("code")
@Expose
private Integer code;
@SerializedName("message")
@Expose
private String message;
@SerializedName("totalrecord")
@Expose
private Integer totalrecord;
@SerializedName("result")
@Expose
private List<Result> result = new ArrayList<Result>();
/**
*
* @return
* The code
*/
public Integer getCode() {
return code;
}
/**
*
* @param code
* The code
*/
public void setCode(Integer code) {
this.code = code;
}
/**
*
* @return
* The message
*/
public String getMessage() {
return message;
}
/**
*
* @param message
* The message
*/
public void setMessage(String message) {
this.message = message;
}
/**
*
* @return
* The totalrecord
*/
public Integer getTotalrecord() {
return totalrecord;
}
/**
*
* @param totalrecord
* The totalrecord
*/
public void setTotalrecord(Integer totalrecord) {
this.totalrecord = totalrecord;
}
/**
*
* @return
* The result
*/
public List<Result> getResult() {
return result;
}
/**
*
* @param result
* The result
*/
public void setResult(List<Result> result) {
this.result = result;
}
}
请帮帮我!!!
日志：
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ <--- HTTP 200 http://203.124.107.14:39/VrinsoftCRM.asmx/GetUserGroupList (242ms)
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ Cache-Control: private, max-age=0
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ Content-Length: 699
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ Server: Microsoft-IIS/7.5
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ X-AspNet-Version: 2.0.50727
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ X-Powered-By: ASP.NET
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ Date: Thu, 14 Apr 2016 09:48:54 GMT
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ OkHttp-Selected-Protocol: http/1.1
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ OkHttp-Sent-Millis: 1460627392316
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ OkHttp-Received-Millis: 1460627392436
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ [{"code":1,"message":"listed!","totalrecord":2,"result":[{"FieldTypeID": "2","Name": "Marketing" },{"FieldTypeID": "60","Name": "Designing" },{"FieldTypeID": "61","Name": "SEO" },{"FieldTypeID": "78","Name": "Mobile App Development" },{"FieldTypeID": "79","Name": ".Net Development" },{"FieldTypeID": "81","Name": "QA" },{"FieldTypeID": "94","Name": "HR" },{"FieldTypeID": "100","Name": "Business Analyst" },{"FieldTypeID": "101","Name": "Business Development Executive" },{"FieldTypeID": "131","Name": "Network Engg" },{"FieldTypeID": "142","Name": "Facebook" },{"FieldTypeID": "156","Name": "PHP Development" },{"FieldTypeID": "157","Name": "Google" },{"FieldTypeID": "158","Name": "Google 2" }]}]
04-14 05:49:52.434 1375-1388/com.example.android.listviewretrofit D/__API__Service﹕ <--- END HTTP (699-byte body)
04-14 05:49:52.434 1375-1375/com.example.android.listviewretrofit D/Suceess :: ::﹕ [ 04-14 05:49:52.434 1375: 1375 D/mListResult size :: :: ]
1
答案 0 :(得分：0)
您需要创建一个帮助类
$test = collect($categories)->map(function ($q) {
return collect($q)->lists('id')->toArray();
});
然后改变api方法：
public class Result{
public int code;
public String message;
public int totalrecord;
public List<Flower> result;
}
答案 1 :(得分：0)
请尝试以下代码
创建类ApiService.class
public class ApiService {
private static final String TAG = "__API__Service";
private final api mApiService;
public ApiService(Context context) {
final OkHttpClient okHttpClient = new OkHttpClient();
okHttpClient.setReadTimeout(30, TimeUnit.SECONDS);
okHttpClient.setConnectTimeout(30, TimeUnit.SECONDS);
Gson gson = new GsonBuilder()
.setDateFormat("yyyy-MM-dd'T'HH:mm:ss")
.create();
RestAdapter restAdapter = new RestAdapter.Builder()
.setEndpoint(BASE_URL)
.setLogLevel(RestAdapter.LogLevel.FULL)
.setClient(new OkClient(okHttpClient))
.setLogLevel(BuildConfig.DEBUG ? RestAdapter.LogLevel.FULL : RestAdapter.LogLevel.NONE)
.setLog(new AndroidLog(TAG))
.setConverter(new CleanGsonConverter(gson))
.setErrorHandler(new CustomErrorHandler(context))
.build();
this.mApiService = restAdapter.create(api.class);
}
public List<Result> getAllDataFromServer() {
if (mApiService != null) {
mApiService.getAllData();
}
}
}
创建CleanGsonConverter.class
public class CleanGsonConverter extends GsonConverter {
private Gson mGson;
public CleanGsonConverter(Gson gson) {
super(gson);
mGson = gson;
}
public CleanGsonConverter(Gson gson, String encoding) {
super(gson, encoding);
mGson = gson;
}
@Override
public Object fromBody(TypedInput body, Type type) throws ConversionException {
boolean willCloseStream = false; // try to close the stream, if there is no exception thrown using tolerant JsonReader
try {
String mDirty = toString(body);
if (TextUtils.isEmpty(mDirty)) return null;
String clean = mDirty.replaceAll("(^\\(|\\)$)", "");
body = new JsonTypedInput(clean.getBytes(Charset.forName("UTF-8")));
JsonReader jsonReader = new JsonReader(new InputStreamReader(body.in()));
jsonReader.setLenient(true);
Object o = mGson.fromJson(jsonReader, type);
willCloseStream = true;
return o;
} catch (IOException e) {
e.printStackTrace();
return null;
} finally {
if (willCloseStream) {
closeStream(body);
}
}
}
private String toString(TypedInput body) {
BufferedReader br = null;
StringBuilder sb = new StringBuilder();
String line;
try {
br = new BufferedReader(new InputStreamReader(body.in()));
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
private void closeStream(TypedInput body) {
try {
InputStream in = body.in();
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
创建CustomErrorHandler.class
public class CustomErrorHandler implements ErrorHandler {
private final Context mContext;
public CustomErrorHandler(Context context) {
this.mContext = context;
}
@Override
public Throwable handleError(RetrofitError cause) {
String errorDescription;
if (cause.isNetworkError()) {
errorDescription = mContext.getString(R.string.error_network);
} else {
if (cause.getResponse() == null) {
errorDescription = mContext.getString(R.string.error_no_response);
} else {
// Error message handling - return a simple error to Retrofit handlers..
try {
ErrorResponse errorResponse = (ErrorResponse) cause.getBodyAs(ErrorResponse.class);
errorDescription = errorResponse.error.data.message;
} catch (Exception ex) {
try {
errorDescription = mContext.getString(R.string.error_network_http_error, cause.getResponse().getStatus());
} catch (Exception ex2) {
DebugTool.logD("handleError: " + ex2.getLocalizedMessage());
errorDescription = mContext.getString(R.string.error_unknown);
}
}
}
}
return new Exception(errorDescription);
}
public class ErrorResponse{
Error error;
public class Error {
Data data;
public class Data {
String message;
}
}
}
}
创建JsonTypedInput.class
public class JsonTypedInput implements TypedInput {
private final byte[] mStringBytes;
JsonTypedInput(byte[] stringBytes) {
this.mStringBytes = stringBytes;
}
@Override
public String mimeType() {
return "application/json; charset=UTF-8";
}
@Override
public long length() {
return mStringBytes.length;
}
@Override
public InputStream in() throws IOException {
return new ByteArrayInputStream(mStringBytes);
}
}
添加到gradle.build
compile 'com.squareup.okhttp:okhttp:2.6.0'
compile 'com.squareup.retrofit:retrofit:1.9.0'
compile 'com.google.code.gson:gson:1.7.2'
public class MainActivity extends ListActivity {
private List<Result> mListResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListResult = new ArrayList<Result>();
new GetDataAsync(this).execute();
}
private class GetDataAsync extends AsyncTask<Void, Integer, Void> {
private final WeakReference<SplashActivity> mWeakReference;
private List<Result> mApiResult;
public GetDataAsync(MainActivity mainActivity) {
mWeakReference = new WeakReference< MainActivity >(mainActivity);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
MainActivity activity = mWeakReference.get();
if (activity != null) {
mApiResult = activity.mApiService.getAllDataFromServer();
}
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
adapter adapt = new adapter(getApplicationContext(), R.layout.item_file, mListResult);
setListAdapter(adapt);
}
}
类接口
public interface api {
@GET("/GetUserGroupList")
List<Result> getAllData();
}
您应该创建customAdapter
public class CustomAdapter extends ArrayAdapter<Result> {
private Context mContext;
private List<Result> mListResult;
private int saveStateItem = 1;
public CustomAdapter(Context context, int resource, List<Result> objects) {
super(context, resource, objects);
this.mContext = context;
this.mListResult = objects;
}
@Override
public int getCount() {
return mListResult.size();
}
@Override
public Result getItem(int position) {
return mListResult.get(position);
}
@Override
public View getView(final int position, View view, final ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.item_menu, null);
holder = new ViewHolder();
holder.mType = (TextView) view.findViewById(R.id.textview_type);
holder.mName = (TextView) view.findViewById(R.id.textview_name);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
Result cate = mListResult.get(position);
holder.mType.setText(cate.getFieldTypeID());
holder.mName.setText(cate.getName());
return view;
}
public class ViewHolder {
public TextView mType;
public TextView mName;
}
}
public class MainActivity extends Activity
。您必须更改列表视图的ID
<ListView
android:id="@+id/listview"
>
以及方法onPostExecute
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
CustomAdapter adapt = new CustomAdapter(getApplicationContext(), R.layout.item_file, mListResult);
yourListView.setAdapter(adapt);
}