所以我是一名业余Android开发人员，遇到了问题。 我的应用程序使用了这个库（https://github.com/ta4j/ta4j），但是将其更新到最新的稳定版本后，我遇到了这些错误！
这是错误：
Cannot resolve constructor 'BaseBar(java.time.ZonedDateTime, java.lang.Double, java.lang.Double, java.lang.Double, java.lang.Double, java.lang.Double)'
这是我班上的Java代码：
public class RVCardAdapter extends RecyclerView.Adapter<RVCardAdapter.CryptoViewHolder> {
//globals
private List<SingleCryptoData> mCryptos;
private int mExpandedPosition;
//private int previousExpandedPosition = -1;
//default constructor
public RVCardAdapter() {
super();
mCryptos = new ArrayList<>();
}
//this refreshes the list
public void clear() {
mCryptos.clear();
notifyDataSetChanged();
}
//this adds the POJO passed into the crypto list
public void addData(SingleCryptoData crypto) {
mCryptos.add(crypto);
notifyDataSetChanged();
}
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
@NonNull
@Override
public CryptoViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cryptocurrency_card, viewGroup, false);
return new CryptoViewHolder(v);
}
//onBindViewHolder binds the data to the layout elements for each crypto
@SuppressLint("SetTextI18n")
@Override
public void onBindViewHolder(@NonNull CryptoViewHolder cryptoViewHolder, int i) {
//loading animation
FiftyShadesOf fiftyShades = new FiftyShadesOf(cryptoViewHolder.mCardViewDetails.getContext());
fiftyShades.on(cryptoViewHolder.mSignal, cryptoViewHolder.mCardViewDetails, cryptoViewHolder.mSignalStrength);
fiftyShades.fadein(true);
fiftyShades.start();
//set up output formatting
Currency usd = Currency.getInstance("USD");
NumberFormat currencyFormat = NumberFormat.getCurrencyInstance(Locale.US);
currencyFormat.setCurrency(usd);
NumberFormat twoDecimalFormat = DecimalFormat.getInstance(Locale.US);
twoDecimalFormat.setRoundingMode(RoundingMode.FLOOR);
twoDecimalFormat.setMinimumFractionDigits(0);
twoDecimalFormat.setMaximumFractionDigits(2);
//TODO get display POJO data
cryptoViewHolder.mCryptoName.setText(mCryptos.get(i).getName());
cryptoViewHolder.mCryptoValue.setText(currencyFormat.format(mCryptos.get(i).getRaw().getPrice()));
cryptoViewHolder.mCryptoSymbol.setText(mCryptos.get(i).getRaw().getFromSymbol());
cryptoViewHolder.mCryptoDetailsVolume.setText(twoDecimalFormat.format(mCryptos.get(i).getRaw().getVolume24Hour()) + " " + mCryptos.get(i).getRaw().getFromSymbol());
cryptoViewHolder.mCryptoDetailsLow.setText(currencyFormat.format(mCryptos.get(i).getRaw().getLow24Hour()));
cryptoViewHolder.mCryptoDetailsHigh.setText(currencyFormat.format(mCryptos.get(i).getRaw().getHigh24Hour()));
cryptoViewHolder.mCryptoDetailsOpen.setText(currencyFormat.format(mCryptos.get(i).getRaw().getOpen24Hour()));
cryptoViewHolder.mCryptoDetailsPercentChange.setText(twoDecimalFormat.format(mCryptos.get(i).getRaw().getChangePercent24Hour()) + " %");
//color percent change depending on value
if (mCryptos.get(i).getRaw().getChangePercent24Hour() >= 0) {
cryptoViewHolder.mCryptoDetailsPercentChange.setTextColor(Color.parseColor("#52BE80"));
} else {
cryptoViewHolder.mCryptoDetailsPercentChange.setTextColor(Color.RED);
}
//handles expanding animation
//TODO stop first card from expanding
final boolean isExpanded = cryptoViewHolder.getAdapterPosition() == mExpandedPosition;
cryptoViewHolder.mCardViewDetails.setVisibility((isExpanded) ? View.VISIBLE : View.GONE);
cryptoViewHolder.itemView.setActivated(isExpanded);
// if (isExpanded)
// previousExpandedPosition = cryptoViewHolder.getAdapterPosition();
cryptoViewHolder.itemView.setOnClickListener(v -> {
mExpandedPosition = (isExpanded) ? -1 : cryptoViewHolder.getAdapterPosition();
//notifyItemChanged(previousExpandedPosition); //this used to close the
notifyItemChanged(cryptoViewHolder.getAdapterPosition());
});
//HISTODATA API
CryptoCompareAPI service = ServiceFactory.createRetrofitRx(CryptoCompareAPI.class, CryptoCompareAPI.BASE_URL);
if (android.os.Build.VERSION.SDK_INT >= 26){
//DAYS OF HISTORY TO GET FOR EACH CRYPTO
int historyDays = 14;
service.getHistoricalData(mCryptos.get(i).getRaw().getFromSymbol(), "USD", historyDays, "CryptoAnalysis")
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<HistoData>() {
@Override
public void onSubscribe(Disposable d) {
}
//in histodata, the last element is the newest, and is yesterday. it will be at position [days]
@Override
public void onNext(HistoData histoData) {
TimeSeries series = new BaseTimeSeries("Strategy");
//TODO make usable on API 21+
ZonedDateTime endTime = ZonedDateTime.now().minusDays(historyDays);
//loop for each day of results in histodata
for (int i = 0; i < histoData.getData().size(); i++) {
//create a new base bar
Bar bar = new BaseBar(
endTime.plusDays(i),
histoData.getData().get(i).getOpen(),
histoData.getData().get(i).getHigh(),
histoData.getData().get(i).getLow(),
histoData.getData().get(i).getClose(),
histoData.getData().get(i).getVolumeTo()
);
series.addBar(bar);
}
//RUN ANALYSIS
Signal signal = TechnicalAnalysis.getSignal(series);
//INFLATE LAYOUT STUFF
cryptoViewHolder.mSignal.setText(signal.getSignalResult());
cryptoViewHolder.mRsiValue.setVisibility(View.VISIBLE);
cryptoViewHolder.mRsiValue.setText(String.valueOf((int) signal.getRsiStrength()));
cryptoViewHolder.mMomentumValue.setVisibility(View.VISIBLE);
cryptoViewHolder.mMomentumValue.setText(String.valueOf((int) signal.getMomentumStrength()));
cryptoViewHolder.mEmaValue.setVisibility(View.VISIBLE);
cryptoViewHolder.mEmaValue.setText(String.valueOf((int) signal.getEmaStrength()));
//cryptoViewHolder.mSignalStrength.setText("(" + String.valueOf(signal.getSignalStrength()) + ")");
}
@Override
public void onError(Throwable e) {
if (e.getMessage() != null)
Log.e("Histo API Error", e.getMessage());
}
@Override
public void onComplete() {
fiftyShades.stop();
}
});
} else {
int historyDays = 14;
service.getHistoricalData(mCryptos.get(i).getRaw().getFromSymbol(), "USD", historyDays, "CryptoAnalysis")
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<HistoData>() {
@Override
public void onSubscribe(Disposable d) {
}
//in histodata, the last element is the newest, and is yesterday. it will be at position [days]
@Override
public void onNext(HistoData histoData) {
TimeSeries series = new BaseTimeSeries("Strategy");
//RUN ANALYSIS
Signal signal = TechnicalAnalysis.getSignal(series);
//INFLATE LAYOUT STUFF
cryptoViewHolder.mSignal.setText(signal.getSignalResult());
}
@Override
public void onError(Throwable e) {
if (e.getMessage() != null)
Log.e("Histo API Error", e.getMessage());
}
@Override
public void onComplete() {
fiftyShades.stop();
}
});
}
}
@Override
public int getItemCount() {
return mCryptos.size();
}
static class CryptoViewHolder extends RecyclerView.ViewHolder {
CardView mCardView;
TextView mCryptoDetailsOpen;
TextView mCryptoDetailsHigh;
TextView mCryptoDetailsLow;
TextView mCryptoDetailsVolume;
TextView mCryptoDetailsPercentChange;
TextView mCryptoName;
TextView mCryptoValue;
TextView mCryptoSymbol;
ConstraintLayout mCardViewDetails;
TextView mSignal;
TextView mRsiValueLabel;
TextView mRsiValue;
TextView mEmaValueLabel;
TextView mEmaValue;
TextView mMomentumValueLabel;
TextView mMomentumValue;
TextView mSignalStrength;
TextView mLowerApi;
CryptoViewHolder(View itemView) {
super(itemView);
mCryptoDetailsHigh = itemView.findViewById(R.id.crypto_details_high);
mCryptoDetailsOpen = itemView.findViewById(R.id.crypto_details_open);
mCryptoDetailsLow = itemView.findViewById(R.id.crypto_details_low);
mCryptoDetailsVolume = itemView.findViewById(R.id.crypto_details_volume);
mCryptoDetailsPercentChange = itemView.findViewById(R.id.crypto_details_percent_change);
mCardViewDetails = itemView.findViewById(R.id.card_view_details);
mCardView = itemView.findViewById(R.id.card_view);
mCryptoName = itemView.findViewById(R.id.crypto_name);
mCryptoValue = itemView.findViewById(R.id.crypto_value);
mCryptoSymbol = itemView.findViewById(R.id.crypto_symbol);
mSignal = itemView.findViewById(R.id.signal);
if (android.os.Build.VERSION.SDK_INT >= 26) {
mRsiValue = itemView.findViewById(R.id.rsi_indicator_value);
mRsiValue.setVisibility(View.VISIBLE);
mEmaValue = itemView.findViewById(R.id.ema_indicator_value);
mEmaValue.setVisibility(View.VISIBLE);
mMomentumValue = itemView.findViewById(R.id.momentum_indicator_value);
mMomentumValue.setVisibility(View.VISIBLE);
mRsiValueLabel = itemView.findViewById(R.id.rsi_value_label);
mRsiValueLabel.setVisibility(View.VISIBLE);
mEmaValueLabel = itemView.findViewById(R.id.ema_value_label);
mEmaValueLabel.setVisibility(View.VISIBLE);
mMomentumValueLabel = itemView.findViewById(R.id.momentum_value_label);
mMomentumValueLabel.setVisibility(View.VISIBLE);
mLowerApi = itemView.findViewById(R.id.lowApi);
mLowerApi.setVisibility(View.GONE);
}
//mSignalStrength = itemView.findViewById(R.id.signal_strength);
}
}
}
显示错误的行：
for (int i = 0; i < histoData.getData().size(); i++) {
//create a new base bar
Bar bar = new BaseBar(
endTime.plusDays(i),
histoData.getData().get(i).getOpen(),
histoData.getData().get(i).getHigh(),
histoData.getData().get(i).getLow(),
histoData.getData().get(i).getClose(),
histoData.getData().get(i).getVolumeTo()
);
series.addBar(bar);
}
第2类：
public class TechnicalAnalysis {
//variables and their values, these dictate how likely the signal is to move one way or another.
//Eventually, these will be tweaked and changed to be more accurate.
private static double rsiOversold = 25;
private static double rsiOverbought = 75;
private static double rsiWeight = 0.35;
private static double momentumWeight = 0.3;
private static double emaWeight = 0.35;
public static Signal getSignal(TimeSeries series) {
int numBars = series.getBarCount(); //this is the number of days in the series
//create indicators from series
//in all of these, the LAST member is the latest
ClosePriceIndicator closePrices = new ClosePriceIndicator(series);
RSIIndicator rsi = new RSIIndicator(closePrices, numBars);
EMAIndicator shortEma = new EMAIndicator(closePrices, numBars / 4);
EMAIndicator longEma = new EMAIndicator(closePrices, numBars);
//init strength vars
int rsiStrength = 0;
int momentumStrength = 0;
int emaStrength = 0;
//RSI 35%
for (int i = 0; i < numBars; i++) {
if (rsi.getValue(i).isGreaterThanOrEqual(rsiOverbought)) {
rsiStrength += i;
} else if (rsi.getValue(i).isLessThanOrEqual(rsiOversold)) {
rsiStrength -= i;
}
}
//EMA 45%
for (int i = 0; i < numBars; i++) {
if (shortEma.getValue(i).isGreaterThan(longEma.getValue(i).multipliedBy(1.04))) {
emaStrength += i;
} else {
emaStrength -= i;
}
}
//MOMENTUM 20%
for (int i = 0; i < numBars; i++) {
if (series.getBar(i).getClosePrice().isGreaterThan(series.getBar(i).getOpenPrice())) {
momentumStrength += i;
} else {
momentumStrength -= i;
}
}
//finally, return the completed
double rsiValue = rsiStrength * rsiWeight;
double emaValue = emaStrength * emaWeight;
double momentumValue = momentumStrength * momentumWeight;
return new Signal(rsiValue, emaValue, momentumValue);
}
}
第2类错误：
isGreaterThanOrEqual
(org.ta4j.core.num.Num)
in Num cannot be applied to (double)
第2类错误行：
for (int i = 0; i < numBars; i++) {
if (rsi.getValue(i).isGreaterThanOrEqual(rsiOverbought)) {
rsiStrength += i;
} else if (rsi.getValue(i).isLessThanOrEqual(rsiOversold)) {
rsiStrength -= i;
}
}
请问有人可以帮忙吗？