我正在使用名为LikeButton的git repo，但我的按钮状态在我的recyclerview中不断跳跃？这是回购https://github.com/jd-alexander/LikeButton。基本上当我点击recyclerview项目时，它会根据用户是否喜欢该帖子将textview设置为true或false，这样就可以了。然而，我的按钮的状态正在做一些奇怪的东西，它跳转... 这是我的适配器，它们有什么问题吗？
public class ViewpagerAdapter extends RecyclerView.Adapter<ViewpagerAdapter.ViewDashboard>{
private LayoutInflater mLayoutInflater;
private ArrayList<QuestionData> data = new ArrayList<>();
public ViewpagerAdapter(Context context) {
mLayoutInflater=LayoutInflater.from(context);
}
public void setBloglist(ArrayList<QuestionData> listBlogs) {
this.data = listBlogs;
notifyItemRangeChanged(0,listBlogs.size());
}
@Override
public ViewDashboard onCreateViewHolder(ViewGroup parent, int viewType) {
View view = mLayoutInflater.inflate(R.layout.customizejson, parent, false);
ViewDashboard viewholder = new ViewDashboard(view);
return viewholder;
}
@Override
public void onBindViewHolder(ViewDashboard holder, int position) {
QuestionData questionHolder = data.get(position);
holder.questionText.setText(questionHolder.getMtext());
//This sets the text, to a true or a false String
holder.mStudentVoted.setText(questionHolder.getVoters());
holder.mLikeButton.setTag(holder);
}
@Override
public int getItemCount() {
return data.size();
}
class ViewDashboard extends RecyclerView.ViewHolder {
private TextView questionText;
private LikeButton mLikeButton;
private TextView mStudentVoted;
public ViewDashboard(View itemView) {
super(itemView);
questionText = (TextView)itemView.findViewById(R.id.questionText);
mStudentVoted = (TextView)itemView.findViewById(R.id.studentVoted);
mLikeButton = (LikeButton)itemView.findViewById(R.id.like_button_viewpager);
mLikeButton.setOnLikeListener(new OnLikeListener() {
@Override
public void liked(LikeButton likeButton) {
Voting voting = new Voting(getAdapterPosition(),ViewpagerAdapter.this, questionId);
voting.onUpVote();
}
@Override
public void unLiked(LikeButton likeButton) {
Voting voting = new Voting(getAdapterPosition(),ViewpagerAdapter.this, questionId);
voting.onDownVote();
}
});
}
}
}
投票类
public class Voting {
private int adapterPosition;
private RecyclerView.Adapter adapter;
private String stringId;
private TextView studentVoted;
//TODO Trim Constructor
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, TextView questionId, TextView studentVoted) {
stringId = questionId.getText().toString();
this.adapter = adapter;
this.studentVoted=studentVoted;
}
public void onUpVote() {
final RequestQueue mRequestQueue = VolleySingleton.getInstance().getRequestQueue();
StringRequest postVoteUp = new StringRequest(Request.Method.PUT, PUT_VOTE_UP, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
System.out.println("Succesful Upvote The Students Value is " + studentVoted);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("failed Upvote");
}
});
mRequestQueue.add(postVoteUp);
}
public void onDownVote() {
final RequestQueue mrequestQueue = VolleySingleton.getInstance().getRequestQueue();
//TODO Delete Token(inserted for student 3 for testing purposes)
StringRequest postVoteDown = new StringRequest(Request.Method.PUT, PUT_VOTE_DOWN, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//TODO OnResponse, must setLiked(False)
//Succesful downVote The Students Value is true
//studentVoted.setText("false");
System.out.println("Succesful downVote The Students Value is "+studentVoted);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("failed downVote");
}
});
mrequestQueue.add(postVoteDown);
}
public void realTimeUpVoting(TextView textView){
String voteString= textView.getText().toString();
int voteNumber=Integer.parseInt(voteString)+1;
textView.setText("" + voteNumber);
}
public void realTimeDownVoting(TextView textView){
String voteString= textView.getText().toString();
int voteNumber=Integer.parseInt(voteString)-1;
textView.setText("" + voteNumber);
}
}
Json请求和解析方法
public void JsonRequestMethod() {
mVolleySingleton = VolleySingleton.getInstance();
mRequestQueue = mVolleySingleton.getRequestQueue();
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, URL_HOME, (String) null, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
try {
mListblogs.clear();
mListblogs = new YourTask().execute(response).get();
} catch (InterruptedException | ExecutionException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
mRequestQueue.add(request);
}
private ArrayList<QuestionData> parseJSONResponse(JSONArray response) {
if (!response.equals("")) {
try {
StringBuilder data = new StringBuilder();
for (int x = 0; x < response.length(); x++) {
JSONObject currentQuestions = response.getJSONObject(x);
JSONArray arrSubcategory = currentQuestions.optJSONArray("questions");
for (int y = 0; y < arrSubcategory.length(); y++) {
JSONObject objectSubcategory = arrSubcategory.getJSONObject(y);
String text = objectSubcategory.optString("text");
String studentId = objectSubcategory.optString("studentId");
String votes=objectSubcategory.optString("votes");
/*JSONArray cycles through the array of voters, when a user votes
their ID is added to the array.When they downvote, it is removed
*/
JSONArray voters= objectSubcategory.optJSONArray("voters");
QuestionData questionData = new QuestionData();
questionData.setMstudentId(studentId);
questionData.setMtext(text);
questionData.setVotes(votes);
questionData.setVoters(checkIfVoted(voters));
mQuestionDataArrayList.add(questionData);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return mQuestionDataArrayList;
}
private static String checkIfVoted(JSONArray jsonArray ) {
/*pass in a json Array, copy the array into ints, and if
the students Id is contained in the array return the string true
*/
int[] voteIds = new int[jsonArray.length()];
for(int i=0;i<voteIds.length;i++){
voteIds[i] = jsonArray.optInt(i);
}
for(int i=0;i<voteIds.length;i++){
if(voteIds[i]== Integer.parseInt(Login.getUserId())){
//TODO String was only used for Testing purposes, Convert to Boolean later
return "true";
}
}
return "false";
}
答案 0 :(得分：0)
您目前只更新textview，这就是您的recycleview在滚动时更改状态的原因。
应该更改您的投票类并传递问题数据而不是textview
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, TextView questionId, TextView studentVoted) {
更改为
public Voting(int adapterPosition,final RecyclerView.Adapter adapter, QuestionData questionData, TextView studentVoted) {
// make other changes for the data
然后在
public void realTimeUpVoting(QuestionData questionData){
data.votes++ //something like that. idont know your model
// now call back using interface the recyleview data changed method so it updates the count in recycleview automatically.
修改
在点击按钮中传递问题数据
class ViewDashboard extends RecyclerView.ViewHolder {
public int position
public void onBindViewHolder(ViewDashboard holder, int position) {
holder.position = position
}
public void liked(LikeButton likeButton) {
QuestionData questionHolder = data.get(position);