我正在创建一个应用程序，并有一个Recyclerview用于显示用户提要。我正在使用切换按钮来喜欢帖子。当用户打开应用程序时，如果正在使用该应用程序的用户已经喜欢该状态，则其启用类似按钮，并且用户也可以像其他社交应用程序那样向下滚动来发布帖子。
问题是向下滚动时是否选中了切换按钮 其他切换按钮属于其他帖子也会被检查。
适配器类
public class topNewsAdapter extends RecyclerView.Adapter<topNewsRowHolder> {
private ArrayList<topData> topDataList;
private Context context;
private Activity activity;
private RecyclerView recyclerView;
private View v;
protected String liked = "success";
protected String expired = "Expired";
public topNewsAdapter( ArrayList<topData> listItemList , Activity activity , RecyclerView view) {
this.topDataList = listItemList;
this.activity = activity;
this.recyclerView = view;
}
@Override
public topNewsRowHolder onCreateViewHolder(final ViewGroup parent, int viewType) {
v = LayoutInflater.from(parent.getContext()).inflate(R.layout.top_news_row, parent, false);
context = parent.getContext();
return new topNewsRowHolder(v , activity); //passed activity
}
@Override
public void onBindViewHolder(final topNewsRowHolder holder, final int position) {
topData item = topDataList.get(position);
if(!(item == null)) {
holder.userName.setText(item.getUserName().toString());
holder.timer.setText(item.getCreatedTime().toString());
holder.status.setText(item.getStatus().toString());
holder.fameCount.setText(item.getLikeCount().toString());
holder.dislike_Count.setText(item.getDislike_Count().toString());
holder.statusID.setText(item.getStatusID().toString());
if(item.getLiked().equals(1)){
holder.fameButton.setChecked(true);
}else if(item.getLiked().equals(0)){
holder.fameButton.setChecked(false);
}
if(item.getDisliked().equals(1)){
holder.disLikeButton.setChecked(true);
}else if(item.getDisliked().equals(0)){
holder.disLikeButton.setChecked(false);
}
holder.fameButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
lRequester(holder.statusID.getText().toString() , "1" , holder.fameCount );
dRequester(holder.statusID.getText().toString() , "0" , holder.dislike_Count);
holder.fameButton.setChecked(true);
}else if(!isChecked){
lRequester(holder.statusID.getText().toString() , "0" , holder.fameCount);
}
}
});
holder.disLikeButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
dRequester(holder.statusID.getText().toString(), "1" ,holder.dislike_Count);
lRequester(holder.statusID.getText().toString() , "0" , holder.fameCount);
holder.fameButton.setChecked(false);
}else if(!isChecked){
dRequester(holder.statusID.getText().toString() , "0" , holder.dislike_Count);
}
}
});
}
}
@Override
public int getItemCount() {
return topDataList.size();
}
@Override
public long getItemId(int position) {
return position;
}
public void lRequester(String id , String type, final TextView textview){
Call<responseFD> request = handler.handlerClass.fame(data("u") , data("t") , id , type );
request.enqueue(new Callback<responseFD>() {
@Override
public void onResponse(Call<responseFD> call, Response<responseFD> response) {
if(!response.body().getResponse().isEmpty() && (response.body().getResponse() != null)) {
if (response.body().getResponse().equals(expired)) {
vlData.getInstance().terminateRunnable();
reset();
}else if (response.body().getResponse().equals(liked)) {
textview.setText(response.body().getLike_count().toString());
}
}
}
@Override
public void onFailure(Call<responseFD> call, Throwable t) {
Toast.makeText(v.getContext(), "Something Gone Wrong", Toast.LENGTH_SHORT).show();
}
});
}
public void dRequester(String id , String type , final TextView textView){
Call<responseFD> request = handler.handlerClass.disfame(data("u") , data("t") , id , type );
request.enqueue(new Callback<responseFD>() {
@Override
public void onResponse(Call<responseFD> call, Response<responseFD> response) {
if(!response.body().getResponse().isEmpty() && response.body().getResponse() != null) {
if (response.body().getResponse().equals(expired)) {
vlData.getInstance().terminateRunnable();
reset();
}else if (response.body().getResponse().equals(liked)) {
textView.setText(response.body().getDislike_Count().toString());
}
}
}
@Override
public void onFailure(Call<responseFD> call, Throwable t) {
Log.d("data", "onFailure: " + t.getMessage());
}
});
}
public void reset(){
Intent i = new Intent(activity , login.class);
activity.startActivity(i);
activity.finish();
}
}
Rowholder class
public class topNewsRowHolder extends RecyclerView.ViewHolder {
protected TextView userName;
protected TextView timer;
protected TextView status;
protected ImageView profilePicHolder;
protected TextView fameCount;
protected TextView dislike_Count;
protected ToggleButton fameButton;
protected ToggleButton disLikeButton;
protected View v;
protected TextView statusID;
protected Activity activity;
protected RelativeLayout holderlayout;
public topNewsRowHolder(View view , Activity activity ){
super(view);
v = view;
this.activity = activity;
this.userName = (TextView)view.findViewById(R.id.usernameHolder);
this.timer = (TextView)view.findViewById(R.id.timeHolder);
this.status = (TextView)view.findViewById(R.id.status_user);
this.profilePicHolder = (ImageView)view.findViewById(R.id.profile_pic_holder);
this.fameCount = (TextView)view.findViewById(R.id.like_count);
this.dislike_Count = (TextView)view.findViewById(R.id.dislike_count);
this.fameButton = (ToggleButton)view.findViewById(R.id.fameButton);
this.disLikeButton = (ToggleButton)view.findViewById(R.id.dislikeButton);
this.statusID = (TextView)view.findViewById(R.id.statusID);
this.holderlayout = (RelativeLayout) view.findViewById(R.id.text);
}
}
我知道这是因为回收利用。如何解决这个问题？谢谢:)）
答案 0 :(得分：0)
试试这个：RecyclerView需要一个外部变量来跟踪检查哪些项目，而SparseBooleanArray会起作用，这很乏味。
holder.fameButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean IsChecked) {
isChecked ? item.setIsLiked(1) : item.setIsLiked(0);
if(isChecked){
lRequester(holder.statusID.getText().toString() , "1" , holder.fameCount );
dRequester(holder.statusID.getText().toString() , "0" , holder.dislike_Count);
} else if(!isChecked){
lRequester(holder.statusID.getText().toString() , "0" , holder.fameCount);
}
}
});
答案 1 :(得分：0)
在内容Feed中为managind创建一个Broker模式。
此单例破坏将跟踪每个内容订阅源项ID并将其映射到散列映射中的状态（社交或喜欢）。并且每次在Content Feed项目中发生反应（如/不同/不喜欢/不相似）时，您都会使用此Broker触发actian，该Broker也会传播并在本地跟踪更改。您可以实现Broadcaster或pub-sub模式，以便为UI提供有关更改的信息。
最好使用带有数据库的Content Provider来存储您从网络服务器获取的json。
如果您需要进一步澄清，请与我们联系。
SocialBroker.java
public class SocialBroker extends ISocialBroker {
//region <!-- Private properties -->
private static SocialBroker _instance;
private HashMap<UUID, SocialStatus> _map = new HashMap<>();
//endregion
//region <!-- Singleton initializer -->
public static SocialBroker newInstance() {
if (_instance == null) {
_instance = new SocialBroker();
}
return _instance;
}
private SocialBroker() {};
//endregion
// The interface method implemented here
}
ISocialBroker.java
public interface ISocialBroker {
public synchronized SocialStatus save(String expiresAt, UUID id, boolean hasLiked, int numberOfLikes, int numberOfComments);
public SocialStatus lookup(UUID id);
public synchronized SocialStatus like(UUID id);
public synchronized SocialStatus unlike(UUID id);
public HashMap<UUID, SocialStatus> getMap();
public void loadState(HashMap<UUID, SocialStatus> restoredSocialState);
}
OnReactionObserver.java
public interface OnReactionObserver {
void onLikeReaction();
}
OnReactionPublisher.java
public interface OnReactionPublisher {
void attachObserver(OnReactionObserver... observer);
void notifyListeners();
}
当您将结果绑定到适配器中的视图时，使用代理保存条目，然后在类似按钮视图中，再次召唤Broker以执行like / different / dislike / undislike。
SocialStatus只是一个跟踪信息的模型，可以序列化，保存，与在线服务同步。
希望这能指向正确的方向。