在格式化Recyclerview的数据时遇到问题

时间：2018-10-11 12:39:44

标签： android-fragments android-recyclerview recycler-adapter

我是新来的Android，正在一个项目中工作，我有一个API，可为我提供SymbolName（例如：GOLD），BID，ASK等值。 因此，我在Recyclerview中调用了此api。 用户可以添加新符号，就像添加添加在API中传递的新符号一样，我们将获得该符号的详细信息。 数据正确显示，但是我想更改从API接收的Bid and Ask文本颜色。 因此，例如，当我调用API BID值为5时，它将以蓝色显示。在大约1秒钟的间隔后，我将再次调用此API，并且如果从API接收到的新值小于先前的值，则文本颜色应更改为红色，或者如果颜色较大，则为蓝色。 我已经为其编写了代码，并且可以正常工作，直到只有5个符号为止。如果我在API中传递了第6个符号，则逻辑将无法正常工作。

我附上代码供您参考。

我需要致电的片段报价

public class Quotes extends Fragment implements View.OnClickListener {

LinearLayout bottomlayout,v1,v2;
EditText search;
TextView cancel;
ArrayList<QuoteData> quotelist = new ArrayList<>();
List<String> SYSMBOL_ARRAY = new ArrayList<>();
RecyclerView recyclerView;
QuoteAdapter adapter;
ProgressBar progressBar;
SwitchCompat proview,onclicktrade;

DatabaseHelper mydb;
ArrayList<String> list;
String symbollist = "";
String usersymbol;
String value;

SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;

boolean REFRESH_SYSMBOL = false;
Intent mIntent;
static BroadcastReceiverData mBroadcastReceiver;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // Inflate the popup for this fragment

    View view = inflater.inflate(R.layout.fragment_quotes, container, false);

    sharedPreferences = this.getContext().getSharedPreferences("switch",MODE_PRIVATE);
    editor = sharedPreferences.edit();

    mydb = new DatabaseHelper(getContext());

    list = mydb.getValues("Symbol_Table");
    String val = "";
    String symbolname = "";

    Toast.makeText(getContext(), "List"+list.size(), Toast.LENGTH_SHORT).show();

    for (int i = 0; i < list.size(); i++) {
        val = list.get(i);

        if (val.equalsIgnoreCase(""))
        {
            symbolname = val ;
        }
        else
        {
            symbolname = symbolname +"," + val ;
        }
    }

    value = symbolname.replace(" ","%20");

    usersymbol = Dataholder.url + value;

    recyclerView = (RecyclerView)view.findViewById(R.id.lists);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
    recyclerView.setLayoutManager(linearLayoutManager);
    adapter = new QuoteAdapter(getActivity(),quotelist);

    ItemTouchHelper.Callback callback = new SimpleDragHelper(adapter);
    ItemTouchHelper touchHelper = new ItemTouchHelper(callback);
    touchHelper.attachToRecyclerView(recyclerView);

    adapter.notifyDataSetChanged();

    recyclerView.addItemDecoration(new DividerItemDecoration(ContextCompat.getDrawable(getContext(),R.drawable.item_decorator)));


    new QuotesData().execute("http://xx.xxx.xxx.xx/mobileapp-webservice/new/Default.aspx?Action=getDashboardT&token="+usersymbol+"&from=1&to=20");
    return view;
}

class QuotesData extends AsyncTask < String, Void, String>{

    @Override
    protected String doInBackground(String... urls) {
        return Dataholder.getApi(urls[0]);
    }

    @Override
    protected void onPostExecute(String result) {
        SYSMBOL_ARRAY.clear();
        quotelist.clear();
        try {
            JSONObject jsonObject = new JSONObject(result);
            String auth = jsonObject.getString("result");
            JSONArray jsonArray =new JSONArray(auth);

            for (int i = 0; i<jsonArray.length(); i++)
            {
                JSONObject key = jsonArray.getJSONObject(i);

                if (key.getString("message").equals("success"))
                {
                    String symbol = key.getString("symbol");
                    String bid = key.getString("bid");
                    String bidqty = key.getString("bidqty");
                    String ask = key.getString("ask");
                    String askqty = key.getString("askqty");
                    String ltp = key.getString("ltp");
                    String open = key.getString("open");
                    String close = key.getString("close");
                    String high = key.getString("high");
                    String low = key.getString("low");
                    String vol = key.getString("vol");
                    String oi = key.getString("oi");
                    String change = key.getString("change");
                    String netchange = key.getString("netchange");
                    String lotsize = key.getString("lotsize");
                    String ltt = key.getString("ltt");
                    String lut = key.getString("lut");
                    String expiry = key.getString("expiry");
                    String exchange = key.getString("exchange");

                    SYSMBOL_ARRAY.add(symbol);
                    quotelist.add(new QuoteData(symbol,bid,bidqty,ask,askqty,ltp,open,close,high,low,vol,oi,change,netchange,lotsize,ltt,lut,expiry,exchange));
                    adapter.notifyDataSetChanged();

                    REFRESH_SYSMBOL = true;
                }
                else if (key.getString("message").equals("fail")) {
                    quotelist.clear();
                    adapter.notifyDataSetChanged();
                }
            }
            progressBar.setVisibility(View.GONE);
            recyclerView.setAdapter(adapter);

        } catch (JSONException e) {
            e.printStackTrace();
        }

        if (REFRESH_SYSMBOL) {

            mIntent = new Intent(getActivity(), ServiceQuote.class);
            mIntent.putExtra("keyWatchUrl", "http://xx.xxx.xxx.xx/mobileapp-webservice/new/Default.aspx?Action=getDashboardT&token="+usersymbol+"&from=1&to=20");
            getActivity().startService(mIntent);

            try {
                mBroadcastReceiver = new BroadcastReceiverData();
                IntentFilter intentFilter = new IntentFilter(Dataholder.ACTION_ACTIVE_QUOTE);
                intentFilter.addCategory(Intent.CATEGORY_DEFAULT);
                getActivity().registerReceiver(mBroadcastReceiver, intentFilter);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}

private void setQuotefirst(String result){
    try {
        JSONObject jsonObject = new JSONObject(result);
        String auth = jsonObject.getString("result");
        JSONArray jsonArray =new JSONArray(auth);

        for (int i = 0; i<jsonArray.length(); i++)
        {
            JSONObject key = jsonArray.getJSONObject(i);

            if (key.getString("message").equals("success"))
            {
                String symbol = key.getString("symbol");
                String bid = key.getString("bid");
                String bidqty = key.getString("bidqty");
                String ask = key.getString("ask");
                String askqty = key.getString("askqty");
                String ltp = key.getString("ltp");
                String open = key.getString("open");
                String close = key.getString("close");
                String high = key.getString("high");
                String low = key.getString("low");
                String vol = key.getString("vol");
                String oi = key.getString("oi");
                String change = key.getString("change");
                String netchange = key.getString("netchange");
                String lotsize = key.getString("lotsize");
                String ltt = key.getString("ltt");
                String lut = key.getString("lut");
                String expiry = key.getString("expiry");
                String exchange = key.getString("exchange");

                for(int j=0;j<SYSMBOL_ARRAY.size();j++){
                    if (SYSMBOL_ARRAY.get(j).equalsIgnoreCase(symbol)){

                        quotelist.remove(j);
                        quotelist.add(j,new QuoteData(symbol, bid, ask, high, low, lut));
                        adapter.notifyDataSetChanged();
                    }
                }
            }
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }
}

Handler handlerRefresh = new Handler();
public class BroadcastReceiverData extends BroadcastReceiver {
    @Override
    public void onReceive(Context context,final Intent intent) {
        String action = intent.getAction();

        if (action.equalsIgnoreCase(Dataholder.ACTION_ACTIVE_QUOTE)){
            handlerRefresh.post(new Runnable() {
                @Override
                public void run() {
                    String data = intent.getStringExtra(Dataholder.ACTION_KEY);
                    setQuotefirst(data);
                }
            });
        }

    }
}
}

RecyclerView的适配器代码 这是“比较”和“红色/蓝色”显示的逻辑

public class QuoteAdapter extends RecyclerView.Adapter <QuoteAdapter.MyViewHolder>{
Context context;
List<QuoteData> data;

class MyViewHolder extends RecyclerView.ViewHolder{

    TextView time,symbol,sellmax,selllow,buymax,buylow,buy,sell,spread,lowtext,hightext;
    LinearLayout layout,layoutbid,layoutask;

    double currentbid,lastbid,currentask,lastask;

    public MyViewHolder(@NonNull View itemView) {
        super(itemView);
        time = itemView.findViewById(R.id.TVTime);
        symbol = itemView.findViewById(R.id.TVSymbol);
        sellmax = itemView.findViewById(R.id.TVSELLMAX);
        selllow = itemView.findViewById(R.id.TVSELLLOW);
        buymax = itemView.findViewById(R.id.TVBUYMAX);
        buylow = itemView.findViewById(R.id.TVBUYHIGH);
        buy = itemView.findViewById(R.id.TVBUY);
        sell = itemView.findViewById(R.id.TVSELL);
        spread = itemView.findViewById(R.id.TVSpread1);
        lowtext = itemView.findViewById(R.id.low);
        hightext = itemView.findViewById(R.id.high);
        layout = itemView.findViewById(R.id.layout);
        layoutbid = itemView.findViewById(R.id.LLBid);
        layoutask = itemView.findViewById(R.id.LLAsk);
    }
}

public QuoteAdapter(Context context,List<QuoteData> data)
{
    this.data = data;
    this.context = context;
}


@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.quotelist,viewGroup,false);
    return new MyViewHolder(view);
}


@SuppressLint("ResourceAsColor")
@Override
public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, final int i) {
    final QuoteData data1 = data.get(i);

    if (i % 2 == 1) {
        myViewHolder.layout.setBackgroundColor(Color.parseColor("#fff0f0f0"));
    } else
    {
        myViewHolder.layout.setBackgroundColor(Color.WHITE);
    }


    Spannable bid = new SpannableString(data1.dBid);
    bid.setSpan(new RelativeSizeSpan(1.7f),2,3,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    Spannable ask = new SpannableString(data1.dAsk);
    ask.setSpan(new RelativeSizeSpan(1.7f),2,3,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

    myViewHolder.time.setText(data1.dLut);
    myViewHolder.symbol.setText(data1.dSymbol);
    myViewHolder.sellmax.setText(data1.dBid);  //Bid
    myViewHolder.selllow.setText(data1.dLow);
    myViewHolder.buymax.setText(data1.dAsk);  //ask
    myViewHolder.buylow.setText(data1.dHigh);


    myViewHolder.currentbid = Double.parseDouble(data1.dBid);
    myViewHolder.currentask = Double.parseDouble(data1.dAsk);



    if (myViewHolder.currentbid > myViewHolder.lastbid)
    {
        myViewHolder.sellmax.setTextColor(Color.BLUE);
    }else if (myViewHolder.currentbid < myViewHolder.lastbid)
    {
        myViewHolder.sellmax.setTextColor(Color.RED);
    }

    myViewHolder.lastbid = myViewHolder.currentbid;
    //myViewHolder.lastask = myViewHolder.currentask;




    myViewHolder.layout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {


            final Dialog dialog = new Dialog(context); // Context, this, etc.
            dialog.setTitle("Action");
            dialog.setContentView(R.layout.tradeaction);
            dialog.show();

            TextView trade = dialog.findViewById(R.id.TVTrade);
            TextView chart = dialog.findViewById(R.id.TVChart);
            TextView detail = dialog.findViewById(R.id.TVDetail);

            detail.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent detail = new Intent(context,DetailSymbol.class);
                    Bundle symbol = new Bundle();
                    symbol.putString("symbol",data1.dSymbol);
                    detail.putExtras(symbol);
                    context.startActivity(detail);
                }
            });

            chart.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Dataholder.Chart = true;
                    Intent chart = new Intent(context,MainScreen.class);
                    context.startActivity(chart);
                }
            });

            trade.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent trade = new Intent(context,tradeitem.class);
                    Bundle symbol = new Bundle();
                    symbol.putString("lotsize",data1.dLotsize);
                    symbol.putString("symbol",data1.dSymbol);
                    trade.putExtras(symbol);
                    if (mBroadcastReceiver != null){
                        context.unregisterReceiver(mBroadcastReceiver);
                    }
                    context.startActivity(trade);
                }
            });

        }
    });
}


@Override
public int getItemCount() {
    return data.size();
}
}

用于存储API数据的类

public class QuoteData {

public String datasymbol;
public String dataltp;
public String datachg;
public String datavol;

public QuoteData(String txtsymbol, String txtltp, String txtchg){
    this.datasymbol = txtsymbol;
    this.dataltp = txtltp;
    this.datachg = txtchg;
}


String dSymbol,dBid,dBidqty,dAsk,dLtp,dAskqty,dOpen,dClose,dHigh,dLow,dVol,dOi,dChange,dNetchange,dLotsize,dLtt,dLut,dExpiry,dExchange;
public QuoteData(String dSymbol, String dBid, String dBidqty, String dAsk,String dLtp, String dAskqty,String dOpen,String dClose,String dHigh,String dLow,String dVol,String dOi,String dChange,String dNetchange,String dLotsize,String dLtt,String dLut,String dExpiry,String dExchange){
    this.dSymbol = dSymbol;
    this.dBid = dBid;
    this.dBidqty = dBidqty;
    this.dAsk = dAsk;
    this.dLtp = dLtp;
    this.dAskqty = dAskqty;
    this.dOpen = dOpen;
    this.dClose = dClose;
    this.dHigh = dHigh;
    this.dLow = dLow;
    this.dVol = dVol;
    this.dOi = dOi;
    this.dChange = dChange;
    this.dNetchange = dNetchange;
    this.dLotsize=dLotsize;
    this.dLtt = dLtt;
    this.dLut = dLut;
    this.dExpiry = dExpiry;
    this.dExchange = dExchange;
}

public QuoteData(String dSymbol,String dBid,String dAsk,String dLow,String dHigh,String dLut){
    this.dSymbol = dSymbol;
    this.dBid = dBid;
    this.dAsk = dAsk;
    this.dLow = dLow;
    this.dHigh = dHigh;
    this.dLut = dLut;
}

}

所以任何人都可以帮助我，为什么添加第六个符号时逻辑不起作用。

1 个答案:

答案 0 :(得分：1)

在适配器中定义两个String ArrayList 

public class QuoteAdapter extends RecyclerView.Adapter <QuoteAdapter.MyViewHolder>{

Context context;
List<QuoteData> data;
List<String> olddatabid = new ArrayList<String>();
List<String> newdatabid = new ArrayList<String>();
List<String> olddataask = new ArrayList<String>();
List<String> newdataask = new ArrayList<String>();

class MyViewHolder extends RecyclerView.ViewHolder{

TextView time,symbol,sellmax,selllow,buymax,buylow,buy,sell,spread,lowtext,hightext;
LinearLayout layout,layoutbid,layoutask;


public MyViewHolder(@NonNull View itemView) {
    super(itemView);
    time = itemView.findViewById(R.id.TVTime);
    symbol = itemView.findViewById(R.id.TVSymbol);
    sellmax = itemView.findViewById(R.id.TVSELLMAX);
    selllow = itemView.findViewById(R.id.TVSELLLOW);
    buymax = itemView.findViewById(R.id.TVBUYMAX);
    buylow = itemView.findViewById(R.id.TVBUYHIGH);
    buy = itemView.findViewById(R.id.TVBUY);
    sell = itemView.findViewById(R.id.TVSELL);
    spread = itemView.findViewById(R.id.TVSpread1);
    lowtext = itemView.findViewById(R.id.low);
    hightext = itemView.findViewById(R.id.high);
    layout = itemView.findViewById(R.id.layout);
    layoutbid = itemView.findViewById(R.id.LLBid);
    layoutask = itemView.findViewById(R.id.LLAsk);
}
}

public QuoteAdapter(Context context,List<QuoteData> data)
{
   this.data = data;
   this.context = context;
}


@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.quotelist,viewGroup,false);
return new MyViewHolder(view);
}


@SuppressLint("ResourceAsColor")
@Override
public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, final int i) {
    final QuoteData data1 = data.get(i);

myViewHolder.time.setText(data1.dLut);
myViewHolder.symbol.setText(data1.dSymbol);
myViewHolder.sellmax.setText(data1.dBid);  //Bid
myViewHolder.selllow.setText(data1.dLow);
myViewHolder.buymax.setText(data1.dAsk);  //ask
myViewHolder.buylow.setText(data1.dHigh);

if (newdatabid.size()< data.size())
{
    newdatabid.add(data1.dBid);  //Insert Value in array for the first time
}

if (olddatabid.size()< data.size())
{
    olddatabid.add(data1.dBid);  //Insert Value in array for the first time
}



if (newdataask.size()< data.size())
{
    newdataask.add(data1.dAsk);   //Insert Value in array for the first time
}

if (olddataask.size()< data.size())    //Insert Value in array for the first time
{
    olddataask.add(data1.dAsk);
}





newdatabid.set(i,data1.dBid);   //Store Value in array
newdataask.set(i,data1.dAsk);   //Store Value in array

//Compare and perform Logic
if (Float.valueOf(newdatabid.get(i)) > Float.valueOf(olddatabid.get(i)))
{
    myViewHolder.sellmax.setTextColor(Color.BLUE);
}

if (Float.valueOf(newdatabid.get(i)) < Float.valueOf(olddatabid.get(i)))
{
    myViewHolder.sellmax.setTextColor(Color.RED);
}



if (Float.valueOf(newdataask.get(i)) > Float.valueOf(olddataask.get(i)))
{
    myViewHolder.buymax.setTextColor(Color.BLUE);
}

if (Float.valueOf(newdataask.get(i)) < Float.valueOf(olddataask.get(i)))
{
    myViewHolder.buymax.setTextColor(Color.RED);
}


olddatabid.set(i,newdatabid.get(i));
olddataask.set(i,newdataask.get(i));

        }
    });
}
 }


@Override
public int getItemCount() {
    return data.size();
 }
}
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