我实现了parceable类来将一些数据从一个活动传递到另一个活动。我设法获得了课堂上的其他项目。但是该类有一个列表对象，我希望在另一个片段中显示。我认为问题与我的适配器有关。请帮助我。我已经附加了我的片段类和我的适配器类。
片段类
public class ForumDetailFragment extends Fragment {
private TextView titleTV;
private TextView timeTV;
private TextView dateTV;
private TextView detailsTV;
private ListView answerListView;
private LinearLayout themeLayout;
private ImageView themeIMG;
private StoredForum currentQuestion;
private AnswerAdapter adapter;
SimpleDateFormat formatDate = new SimpleDateFormat("MMM-dd-yyyy");
SimpleDateFormat formatTime = new SimpleDateFormat("HH:mm aaa");
public ForumDetailFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_forum_detail, container, false);
currentQuestion = getArguments().getParcelable(StoredForum.QUESTION_CLASS);
titleTV = (TextView) rootView.findViewById(R.id.titleTV);
timeTV = (TextView) rootView.findViewById(R.id.timeTV);
detailsTV = (TextView) rootView.findViewById(R.id.detailsTV);
answerListView = (ListView) rootView.findViewById(R.id.answerListView);
themeLayout = (LinearLayout) rootView.findViewById(R.id.eventTypeThemeLayout);
themeIMG = (ImageView) rootView.findViewById(R.id.eventTypeThemeIMG);
dateTV = (TextView) rootView.findViewById(R.id.dateTV);
titleTV.setText(currentQuestion.getTitle());
detailsTV.setText(currentQuestion.getDescription());
timeTV.setText(formatTime.format(currentQuestion.getQuestionDate()));
dateTV.setText(formatDate.format(currentQuestion.getQuestionDate()));
setupTheme();
setUpListView(rootView);
updateAnswer();
return rootView;
}
public void setUpListView(View rootView) {
answerListView = (ListView) rootView.findViewById(R.id.answerListView);
adapter = new AnswerAdapter(getActivity(), new ArrayList<Question>());
answerListView.setAdapter(adapter);
}
private void setupTheme() {
if (currentQuestion.getDescription().equals(StoredForum.FORUM_QUESTION)) {
themeLayout.setBackgroundColor(getActivity().getResources().getColor(R.color.pink));
themeIMG.setImageResource(R.drawable.abc_ic_menu_copy_mtrl_am_alpha);
} else {
themeLayout.setBackgroundColor(getActivity().getResources().getColor(R.color.orange));
themeIMG.setImageResource(R.drawable.abc_ic_menu_paste_mtrl_am_alpha);
}
}
public void updateAnswer() {
AuthUser user = AuthUser.getInstance(getActivity());
Retrofit retrofit = ApiHandle.getRetrofit(user.getToken());
QuestionService service = retrofit.create(QuestionService.class);
service.getQuestions().enqueue(new Callback<List<com.apps233.moja.packages.forum.Question>>() {
@Override
public void onResponse(Response<List<com.apps233.moja.packages.forum.Question>> response, Retrofit retrofit) {
if (response.isSuccess()) {
adapter.clear();
adapter.addAll(response.body());
adapter.notifyDataSetChanged();
}
}
@Override
public void onFailure(Throwable t) {
}
});
}
}
适配器类
public class AnswerAdapter extends ArrayAdapter<Question> {
List<Question> answers = new ArrayList<Question>();
public AnswerAdapter(Context context, List<Question> answers) {
super(context, R.layout.item_answer, answers);
this.answers = answers;
}
public static class ViewHolder {
private TextView titleTV;
private TextView descriptionTV;
public ViewHolder(View view) {
titleTV = (TextView) view.findViewById(R.id.titleTV);
descriptionTV = (TextView) view.findViewById(R.id.descriptionTV);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Question question = answers.get(position);
ViewHolder holder;
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_answer, parent, false);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.titleTV.setText("Doctor");
holder.descriptionTV.setText(question.getAnswers().toString());
return convertView;
}
}
该列表显示在以下活动中
the list is displaying the package name @ some list of numbers
问题类
public class Question {
private Long id;
private String title;
private Long userId;
private String description;
private Date questionDate;
private List<Answer> answers;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getQuestionDate() {
return questionDate;
}
public void setQuestionDate(Date questionDate) {
this.questionDate = questionDate;
}
public List<Answer> getAnswers() {
return answers;
}
public void setAnswers (List<Answer> answers){
this.answers = answers;
}
}
Parceable Class
public class StoredForum implements Parcelable {
public static final String QUESTION_ID = "QUESTION_ID";
public static final String QUESTION_CLASS = "QUESTION";
public static final String FORUM_QUESTION = "forum-chat";
Long id;
Long userId;
String title;
String description;
Date questionDate;
List<Answer> answers;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getQuestionDate() {
return questionDate;
}
public void setQuestionDate(Date questionDate) {
this.questionDate = questionDate;
}
public List<Answer> getAnswers() {
return answers;
}
public void setAnswers(List<Answer> answers){
this.answers = answers;
}
private StoredForum() {
}
public static StoredForum fromQuestion(Question question) {
StoredForum storedForum = new StoredForum();
storedForum.setId(question.getId());
storedForum.setUserId(question.getUserId());
storedForum.setTitle(question.getTitle());
storedForum.setDescription(question.getDescription());
storedForum.setQuestionDate(question.getQuestionDate());
storedForum.setAnswers(question.getAnswers());
return storedForum;
}
protected StoredForum(Parcel in) {
id = in.readByte() == 0x00 ? null : in.readLong();
userId = in.readByte() == 0x00 ? null : in.readLong();
title = in.readString();
description = in.readString();
questionDate = new Date(in.readString());
answers = new ArrayList<Answer>();
answers = in.readArrayList(Answer.class.getClassLoader());
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
if (id == null) {
dest.writeByte((byte) (0x00));
} else {
dest.writeByte((byte) (0x01));
dest.writeLong(id);
}
if (userId == null) {
dest.writeByte((byte) (0x00));
} else {
dest.writeByte((byte) (0x01));
dest.writeLong(userId);
}
dest.writeString(title);
dest.writeString(description);
if(questionDate != null){
dest.writeString(questionDate.toString());
} else {
dest.writeString("0");
}
answers = new ArrayList<Answer>();
dest.writeList(answers);
}
public static final Parcelable.Creator<StoredForum> CREATOR = new Parcelable.Creator<StoredForum>() {
@Override
public StoredForum createFromParcel(Parcel in) {
return new StoredForum(in);
}
@Override
public StoredForum[] newArray(int size) {
return new StoredForum[size];
}
};
}
答案类
public class Answer {
Long id;
Long userId;
Long questionId;
String description;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Long getUserId() {
return userId;
}
public void setUserId(Long userId) {
this.userId = userId;
}
public Long getQuestionId() {
return questionId;
}
public void setQuestionId(Long questionId) {
this.questionId = questionId;
}
public String getDescription() {
return description;
}
public void setDescription(String description){
this.description = description;
}
}
答案 0 :(得分：2)
您需要在public String toString()类中实现/覆盖Answer方法。
@Override
public String toString() {
return description;
}