Java Android无法获取对服务器的改型API调用
我正在做一个Android项目。我正在使用改型来调用API。因此，我正在进行一个API调用，以获取与证书相关的课程列表 来自服务器get（BASE_URL/certificates/1）的响应为： 我有证书列表，需要采取的行动是，单击证书后，它应该进入新的片段，该片段包含与此证书相关的所有课程（单击）。为此，我进行了上述API调用 问题是，当我单击列表中的第一个证书时，它会转到下一个片段并列出所有课程。但是，当我单击任何其他证书时，它会显示空白片段。调试代码时，在fetchCourses（）CoursesListOfCertificatesFragment.java中调用onFailure（）函数 工作流是CertificateFragment是列出所有证书的类。单击后，CertificateFragment中的CertificateClickListner（）将被触发，并依次启动CoursesListOfCertificatesFragment，其中证书对象传递到此片段的构造函数中。这里我进行API调用GET（BASE_URL/certificates/1） 这在CoursesListOfCertificatesFragment的fetchCourses（）中。但除了第一个证书外，调用了onFailure（）方法 感谢您的帮助。。。。。如果需要任何其他信息，请询问 谢谢 以下是列出的相关类别： CoursesListOfCertificatesFragment.javaJava Android无法获取对服务器的改型API调用,java,android,android-fragments,retrofit,Java,Android,Android Fragments,Retrofit,我正在做一个Android项目。我正在使用改型来调用API。因此，我正在进行一个API调用，以获取与证书相关的课程列表 来自服务器get（BASE_URL/certificates/1）的响应为： 我有证书列表，需要采取的行动是，单击证书后，它应该进入新的片段，该片段包含与此证书相关的所有课程（单击）。为此，我进行了上述API调用 问题是，当我单击列表中的第一个证书时，它会转到下一个片段并列出所有课程。但是，当我单击任何其他证书时，它会显示空白片段。调试代码时，在fetchCourses（）Co
package com.localjini.learner.fragments;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.localjini.learner.R;
import com.localjini.learner.adapters.CourseListingRVAdapter;
import com.localjini.learner.api.RestClient;
import com.localjini.learner.main.HomeActivity;
import com.localjini.learner.models.Certificates;
import com.localjini.learner.models.Course;
import com.localjini.learner.models.CoursesResponse;
import com.localjini.learner.models.GetCertificateResponse;
import com.localjini.learner.utils.LogUtils;
import com.localjini.learner.utils.UIHelper;
import java.util.List;
import butterknife.Bind;
import butterknife.ButterKnife;
import retrofit.Call;
import retrofit.Callback;
import retrofit.Response;
import retrofit.Retrofit;
public class CoursesListOfCertificatesFragment extends BaseFragment {
@Bind(R.id.tv_category)
TextView tvCategory;
@Bind(R.id.tv_sort_filter)
TextView tvSortFilter;
@Bind(R.id.pb_course_listing)
ProgressBar pbCourseListing;
@Bind(R.id.rv_course_listing)
RecyclerView rvCourseListing;
public UIHelper uiHelper;
List<Course> courses;
private Certificates certificate;
private int certificate_id;
public CoursesListOfCertificatesFragment(){
}
private CourseListingRVAdapter.CourseClickListener listener = new CourseListingRVAdapter.CourseClickListener() {
@Override
public void onCourseClicked(Course course) {
interactionListener.launchCourseDetailFragment();
}
};
public CoursesListOfCertificatesFragment(Certificates certificate){
this.certificate = certificate;
this.certificate_id = certificate.getId();
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (root == null) {
root = (ViewGroup) inflater.inflate(R.layout.fragment_course_listing, container, false);
ButterKnife.bind(this, root);
initInstances();
fetchCourses();
}
return root;
}
private void initInstances() {
uiHelper = new UIHelper(getActivity());
((HomeActivity) getActivity()).getSupportActionBar().setHomeButtonEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setTitle("");
rvCourseListing.setItemAnimator(new DefaultItemAnimator());
rvCourseListing.setLayoutManager(new LinearLayoutManager(getActivity()));
rvCourseListing.setHasFixedSize(true);
}
private void fetchCourses() {
Call<GetCertificateResponse> call = RestClient.getCMSServiceInstance().getCertificateById(certificate_id);
call.enqueue(new Callback<GetCertificateResponse>() {
@Override
public void onResponse(Response<GetCertificateResponse> response, Retrofit retrofit) {
if (response != null) {
GetCertificateResponse resp = response.body();
if (resp != null) {
showCourses(resp.getCourses());
} else {
uiHelper.showToast("response contain null data");
}
}
}
@Override
public void onFailure(Throwable t) {
LogUtils.d("coursesFailed", t.getMessage());
}
});
}
private void showCourses(List<Course> courses) {
if(courses != null) {
CourseListingRVAdapter courseListingRVAdapter = new CourseListingRVAdapter(getActivity(), courses);
courseListingRVAdapter.setCourseClickListener(listener);
rvCourseListing.setAdapter(courseListingRVAdapter);
}
}
public FragmentId getFragmentId() {
return FragmentId.COURSE_LISTING_FRAGMENT;
}
}
public class CertificateFragment extends BaseFragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
//protected ViewGroup root;
protected Context context;
@Bind(R.id.rv_Certificates) RecyclerView rvCertificates;
private CertificateRVAdapter.CertificateClickListener listener = new CertificateRVAdapter.CertificateClickListener() {
@Override
public void onCertificateClicked(Certificates certificate) {
Toast.makeText(getActivity(), certificate.getName() +" Clicked", Toast.LENGTH_SHORT).show();
//interactionListener.launchCourseListingFragment();
interactionListener.launchCoursesListOfCertificatesFragment(certificate);
}
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(root==null) {
root = (ViewGroup) inflater.inflate(R.layout.fragment_certificate, container, false);
ButterKnife.bind(this, root);
initInstances();
getCertificates();
}
return root;
}
// rvCourseListing.setItemAnimator(new DefaultItemAnimator());
// rvCourseListing.setLayoutManager(new LinearLayoutManager(getActivity()));
// rvCourseListing.setHasFixedSize(true);
//
private void initInstances() {
//uiHelper = new UIHelper(getActivity());
((HomeActivity) getActivity()).getSupportActionBar().setHomeButtonEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setTitle("");
rvCertificates.setItemAnimator(new DefaultItemAnimator());
rvCertificates.setLayoutManager(new LinearLayoutManager(getActivity()));
rvCertificates.setHasFixedSize(true);
}
private void getCertificates() {
Call<AllCertificateResponse> call = RestClient.getCMSServiceInstance().getCertificates();
call.enqueue(new Callback<AllCertificateResponse>() {
@Override
public void onResponse(Response<AllCertificateResponse> response, Retrofit retrofit) {
if (response.isSuccess()) {
//com.squareup.okhttp.Response raw = response.body().raw();
List<Certificates> certificates = response.body().getCertificates();
if (certificates != null)
showCertificates(certificates);
Toast.makeText(getActivity(), "Success in getting certificates", Toast.LENGTH_SHORT).show();
} else {
Log.d("CERT", "response is failure");
}
}
@Override
public void onFailure(Throwable t) {
Toast.makeText(getActivity(), "Failure", Toast.LENGTH_SHORT).show();
}
});
}
public void showCertificates(List<Certificates> certificates){
CertificateRVAdapter adapter = new CertificateRVAdapter(getActivity(), certificates);
adapter.setCertificateClickListener(listener);
rvCertificates.setAdapter(adapter);
}
public FragmentId getFragmentId() {
return FragmentId.COURSE_LISTING_FRAGMENT;
}
}
package com.localjini.learner.fragments；
导入android.os.Bundle；
导入android.support.v7.widget.DefaultItemAnimator；
导入android.support.v7.widget.LinearLayoutManager；
导入android.support.v7.widget.RecyclerView；
导入android.util.Log；
导入android.view.LayoutInflater；
导入android.view.view；
导入android.view.ViewGroup；
导入android.widget.ProgressBar；
导入android.widget.TextView；
导入com.localjini.learner.R；
导入com.localjini.learner.adapters.CourselistingrAdapter；
导入com.localjini.learner.api.RestClient；
导入com.localjini.learner.main.HomeActivity；
导入com.localjini.learner.models.Certificates；
导入com.localjini.learner.models.Course；
导入com.localjini.learner.models.courseResponse；
导入com.localjini.learner.models.GetCertificateResponse；
导入com.localjini.learner.utils.LogUtils；
导入com.localjini.learner.utils.UIHelper；
导入java.util.List；
进口毛刀。装订；
进口毛刀，毛刀；
进口改装。电话；
进口改装.回收；
进口改装.响应；
进口改装。改装；
公共类课程证书列表片段扩展BaseFragment{
@绑定（R.id.tv\U类别）
文本视图类别；
@绑定（R.id.tv\u排序\u过滤器）
文本视图tvSortFilter；
@绑定（R.id.pb\u课程列表）
课程列表；
@绑定（R.id.rv\U课程\U列表）
回收利用和物流配送；
公共UIHelper UIHelper；
列出课程；
私人证书；
私有int证书\u id；
公共课程证书列表片段（）{
}
私有courseListingrAdapter.CourseClickListener侦听器=新courseListingrAdapter.CourseClickListener（）{
@凌驾
已单击公共无效OnCourse（课程）{
interactionListener.launchCourseDetailFragment（）；
}
};
公共课程证书列表片段（证书）{
本证书=证书；
this.certificate_id=certificate.getId（）；
}
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
}
CreateView上的公共视图（布局、充气机、视图组容器、捆绑包保存状态）{
if（root==null）{
根=（视图组）充气器。充气（R.layout.fragment\u course\u列表，容器，false）；
把（这个，根）绑起来；
initInstances（）；
获取课程（）；
}
返回根；
}
私有void initInstances（）{
uiHelper=新的uiHelper（getActivity（））；
（（HomeActivity）getActivity（））.getSupportActionBar（）.setHomeButtonEnabled（true）；
（（HomeActivity）getActivity（））.getSupportActionBar（）.setDisplayHomeAsUpEnabled（true）；
（（HomeActivity）getActivity（））.getSupportActionBar（）.setTitle（“”）；
rvCourseListing.setItemAnimator（新的DefaultItemAnimator（））；
rvCourseListing.setLayoutManager（新的LinearLayoutManager（getActivity（））；
rvCourseListing.setHasFixedSize（真）；
}
私人课程（）{
Call Call=RestClient.getCMSServiceInstance（）.getCertificateById（证书id）；
call.enqueue（新回调（）{
@凌驾
公共响应（响应、改装）{
if（响应！=null）{
GetCertificateResponse resp=response.body（）；
如果（resp！=null）{
showCourses（分别为getCourses（））；
}否则{
showtoos（“响应包含空数据”）；
}
}
}
@凌驾
失效时的公共无效（可丢弃的t）{
LogUtils.d（“coursesFailed”，t.getMessage（））；
}
});
}
私人课程（列出课程）{
如果（课程！=null）{
CourselistingrAdapter CourselistingrAdapter=新CourselistingrAdapter（getActivity（），courses）；
courseListingrAdapter.setCourseClickListener（侦听器）；
rvCourseListing.setAdapter（courseListingrAdapter）；
}
}
公共FragmentId getFragmentId（）{
返回FragmentId.COURSE\u list\u FRAGMENT；
}
}
package com.localjini.learner.fragments;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.localjini.learner.R;
import com.localjini.learner.adapters.CourseListingRVAdapter;
import com.localjini.learner.api.RestClient;
import com.localjini.learner.main.HomeActivity;
import com.localjini.learner.models.Certificates;
import com.localjini.learner.models.Course;
import com.localjini.learner.models.CoursesResponse;
import com.localjini.learner.models.GetCertificateResponse;
import com.localjini.learner.utils.LogUtils;
import com.localjini.learner.utils.UIHelper;
import java.util.List;
import butterknife.Bind;
import butterknife.ButterKnife;
import retrofit.Call;
import retrofit.Callback;
import retrofit.Response;
import retrofit.Retrofit;
public class CoursesListOfCertificatesFragment extends BaseFragment {
@Bind(R.id.tv_category)
TextView tvCategory;
@Bind(R.id.tv_sort_filter)
TextView tvSortFilter;
@Bind(R.id.pb_course_listing)
ProgressBar pbCourseListing;
@Bind(R.id.rv_course_listing)
RecyclerView rvCourseListing;
public UIHelper uiHelper;
List<Course> courses;
private Certificates certificate;
private int certificate_id;
public CoursesListOfCertificatesFragment(){
}
private CourseListingRVAdapter.CourseClickListener listener = new CourseListingRVAdapter.CourseClickListener() {
@Override
public void onCourseClicked(Course course) {
interactionListener.launchCourseDetailFragment();
}
};
public CoursesListOfCertificatesFragment(Certificates certificate){
this.certificate = certificate;
this.certificate_id = certificate.getId();
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (root == null) {
root = (ViewGroup) inflater.inflate(R.layout.fragment_course_listing, container, false);
ButterKnife.bind(this, root);
initInstances();
fetchCourses();
}
return root;
}
private void initInstances() {
uiHelper = new UIHelper(getActivity());
((HomeActivity) getActivity()).getSupportActionBar().setHomeButtonEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setTitle("");
rvCourseListing.setItemAnimator(new DefaultItemAnimator());
rvCourseListing.setLayoutManager(new LinearLayoutManager(getActivity()));
rvCourseListing.setHasFixedSize(true);
}
private void fetchCourses() {
Call<GetCertificateResponse> call = RestClient.getCMSServiceInstance().getCertificateById(certificate_id);
call.enqueue(new Callback<GetCertificateResponse>() {
@Override
public void onResponse(Response<GetCertificateResponse> response, Retrofit retrofit) {
if (response != null) {
GetCertificateResponse resp = response.body();
if (resp != null) {
showCourses(resp.getCourses());
} else {
uiHelper.showToast("response contain null data");
}
}
}
@Override
public void onFailure(Throwable t) {
LogUtils.d("coursesFailed", t.getMessage());
}
});
}
private void showCourses(List<Course> courses) {
if(courses != null) {
CourseListingRVAdapter courseListingRVAdapter = new CourseListingRVAdapter(getActivity(), courses);
courseListingRVAdapter.setCourseClickListener(listener);
rvCourseListing.setAdapter(courseListingRVAdapter);
}
}
public FragmentId getFragmentId() {
return FragmentId.COURSE_LISTING_FRAGMENT;
}
}
public class CertificateFragment extends BaseFragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
//protected ViewGroup root;
protected Context context;
@Bind(R.id.rv_Certificates) RecyclerView rvCertificates;
private CertificateRVAdapter.CertificateClickListener listener = new CertificateRVAdapter.CertificateClickListener() {
@Override
public void onCertificateClicked(Certificates certificate) {
Toast.makeText(getActivity(), certificate.getName() +" Clicked", Toast.LENGTH_SHORT).show();
//interactionListener.launchCourseListingFragment();
interactionListener.launchCoursesListOfCertificatesFragment(certificate);
}
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if(root==null) {
root = (ViewGroup) inflater.inflate(R.layout.fragment_certificate, container, false);
ButterKnife.bind(this, root);
initInstances();
getCertificates();
}
return root;
}
// rvCourseListing.setItemAnimator(new DefaultItemAnimator());
// rvCourseListing.setLayoutManager(new LinearLayoutManager(getActivity()));
// rvCourseListing.setHasFixedSize(true);
//
private void initInstances() {
//uiHelper = new UIHelper(getActivity());
((HomeActivity) getActivity()).getSupportActionBar().setHomeButtonEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setDisplayHomeAsUpEnabled(true);
((HomeActivity) getActivity()).getSupportActionBar().setTitle("");
rvCertificates.setItemAnimator(new DefaultItemAnimator());
rvCertificates.setLayoutManager(new LinearLayoutManager(getActivity()));
rvCertificates.setHasFixedSize(true);
}
private void getCertificates() {
Call<AllCertificateResponse> call = RestClient.getCMSServiceInstance().getCertificates();
call.enqueue(new Callback<AllCertificateResponse>() {
@Override
public void onResponse(Response<AllCertificateResponse> response, Retrofit retrofit) {
if (response.isSuccess()) {
//com.squareup.okhttp.Response raw = response.body().raw();
List<Certificates> certificates = response.body().getCertificates();
if (certificates != null)
showCertificates(certificates);
Toast.makeText(getActivity(), "Success in getting certificates", Toast.LENGTH_SHORT).show();
} else {
Log.d("CERT", "response is failure");
}
}
@Override
public void onFailure(Throwable t) {
Toast.makeText(getActivity(), "Failure", Toast.LENGTH_SHORT).show();
}
});
}
public void showCertificates(List<Certificates> certificates){
CertificateRVAdapter adapter = new CertificateRVAdapter(getActivity(), certificates);
adapter.setCertificateClickListener(listener);
rvCertificates.setAdapter(adapter);
}
public FragmentId getFragmentId() {
return FragmentId.COURSE_LISTING_FRAGMENT;
}
}
公共类CertificateFlagment扩展了BaseFragment{
私有静态最终字符串ARG_PARAM1=“PARAM1”；
私有静态最终字符串ARG_PARAM2=“PARAM2”；
//受保护的视图组根；
受保护的