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TickerTracker optimization

This commit is contained in:
Nicolás Sánchez 2024-12-12 17:18:38 -03:00
parent 120c4f15fc
commit 0893c4670c
2 changed files with 68 additions and 67 deletions
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102
app/src/main/java/com/example/dcav2gui/TickerTracker.java
View File

@ -1,8 +1,6 @@
package com.example.dcav2gui;
//import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import java.io.IOException;
@ -15,87 +13,64 @@ import okhttp3.Response;
public class TickerTracker {
private static final String BINANCE_API_BASE_URL = "https://api.binance.com/api/v3/ticker/24hr";
private static final OkHttpClient httpClient = new OkHttpClient();
//private static final Gson gson = new Gson();
static int requestDepth = 722;
static String requestResolution = "15m";
/**
* Retrieves price change percentages for a specific trading pair from Binance.
*
* @param symbol The trading pair symbol (e.g., "BTCUSDT")
* @return PriceChangeData object containing 24h, 7d, and 30d percentage changes
* @throws IOException If there's an error connecting to the Binance API
*/
public static PriceChangeData getPriceChanges(String symbol) throws IOException {
// Construct the API request URL for 24h change
Request request24h = new Request.Builder()
.url(BINANCE_API_BASE_URL + "?symbol=" + symbol.toUpperCase(Locale.ROOT))
Request historicalRequest = new Request.Builder()
.url("https://api.binance.com/api/v3/klines?symbol=" + symbol.toUpperCase(Locale.ROOT) + "&interval=15m&limit=722")
.build();
// Send 24h request
try (Response response24h = httpClient.newCall(request24h).execute()) {
if (!response24h.isSuccessful()) {
throw new IOException("Unexpected code " + response24h);
try (Response historicalResponse = httpClient.newCall(historicalRequest).execute()) {
if (!historicalResponse.isSuccessful()) {
throw new IOException("Unexpected code " + historicalResponse);
}
String responseBody24h = response24h.body().string();
JsonObject jsonResponse = JsonParser.parseString(responseBody24h).getAsJsonObject();
String historicalResponseBody = historicalResponse.body().string();
// Extract current price
double currentPrice = jsonResponse.has("lastPrice")
? jsonResponse.get("lastPrice").getAsDouble()
: 0.0;
double currentPrice = getCurrentPrice(historicalResponseBody);
double priceChangePercent24h = calculatePercentageChange(historicalResponseBody, 24);
double priceChangePercent7d = calculatePercentageChange(historicalResponseBody, 7*24);
double priceChangePercent30d = calculatePercentageChange(historicalResponseBody, 30*24);
// Extract 24h percentage change
double priceChangePercent24h = jsonResponse.has("priceChangePercent")
? jsonResponse.get("priceChangePercent").getAsDouble()
: 0.0;
// Return the price change data
return new PriceChangeData(
symbol,
currentPrice,
priceChangePercent24h,
priceChangePercent7d,
priceChangePercent30d
);
}
}
// Fetch historical data for 7d and 30d changes
Request historicalRequest = new Request.Builder()
.url("https://api.binance.com/api/v3/klines?symbol=" + symbol.toUpperCase(Locale.ROOT) + "&interval=1d&limit=30")
.build();
// Send historical data request
try (Response historicalResponse = httpClient.newCall(historicalRequest).execute()) {
if (!historicalResponse.isSuccessful()) {
throw new IOException("Unexpected code " + historicalResponse);
}
String historicalResponseBody = historicalResponse.body().string();
// Calculate 7d and 30d percentage changes
double priceChangePercent7d = calculatePercentageChange(historicalResponseBody, 7);
double priceChangePercent30d = calculatePercentageChange(historicalResponseBody, 30);
// Return the price change data
return new PriceChangeData(
symbol,
currentPrice,
priceChangePercent24h,
priceChangePercent7d,
priceChangePercent30d
);
}
private static double getCurrentPrice(String jsonKlineData) {
try {
// Parse the kline data
JsonArray klines = JsonParser.parseString(jsonKlineData).getAsJsonArray();
return klines.get(requestDepth-1).getAsJsonArray().get(4).getAsDouble();
} catch (Exception e) {
System.err.println("Error processing klines for price: " + e.getMessage());
return 0.0;
}
}
// Calculates the percentage change
private static double calculatePercentageChange(String jsonKlineData, int days) {
private static double calculatePercentageChange(String jsonKlineData, int hours) {
try {
// Parse the kline data
JsonArray klines = JsonParser.parseString(jsonKlineData).getAsJsonArray();
// Ensure we have enough data
if (klines == null || klines.size() < days) {
if (klines == null || klines.size() < hours) {
return 0.0;
}
// Get the opening price of the first day in the period
// Kline data structure: [Open time, Open, High, Low, Close, Volume, Close time, Quote asset volume, Number of trades, Taker buy base asset volume, Taker buy quote asset volume, Ignore]
double firstOpenPrice = klines.get(0).getAsJsonArray().get(1).getAsDouble();
// Get the closing price of the last day in the period
double lastClosePrice = klines.get(days - 1).getAsJsonArray().get(4).getAsDouble();
int backwards = 721;
double currentPrice = klines.get(backwards).getAsJsonArray().get(4).getAsDouble();
double periodEndPrice = klines.get(backwards-hours-1).getAsJsonArray().get(1).getAsDouble();
// Calculate percentage change
return ((lastClosePrice - firstOpenPrice) / firstOpenPrice) * 100;
return ((currentPrice-periodEndPrice) / periodEndPrice * 100);
} catch (Exception e) {
System.err.println("Error calculating percentage change: " + e.getMessage());
return 0.0;
@ -126,10 +101,5 @@ public class TickerTracker {
public double getPriceChangePercent7d() { return priceChangePercent7d; }
public double getPriceChangePercent30d() { return priceChangePercent30d; }
// @Override
// public String toString() {
// return String.format("Symbol: %s\nPrice: %.2f%%\n24h Change: %.2f%%\n7d Change: %.2f%%\n30d Change: %.2f%%",
// symbol, currentPrice, priceChangePercent24h, priceChangePercent7d, priceChangePercent30d);
// }
}
}

33
app/src/main/java/com/example/dcav2gui/ui/home/HomeFragment.java
View File

@ -137,6 +137,37 @@ public class HomeFragment extends Fragment {
profitsToday.setText(R.string.profits_today_example);
profitsThisMonth.setText(R.string.profits_this_month_example);
//Load cached values
//Prices
pricePair1.setText(R.string.default_price_ticker_1);
pricePair2.setText(R.string.default_price_ticker_2);
pricePair3.setText(R.string.default_price_ticker_3);
pricePair124hPercentage.setText(R.string.percentage_example);
pricePair17dPercentage.setText(R.string.percentage_example);
pricePair130dPercentage.setText(R.string.percentage_example);
pricePair224hPercentage.setText(R.string.percentage_example);
pricePair27dPercentage.setText(R.string.percentage_example);
pricePair230dPercentage.setText(R.string.percentage_example);
pricePair324hPercentage.setText(R.string.percentage_example);
pricePair37dPercentage.setText(R.string.percentage_example);
pricePair330dPercentage.setText(R.string.percentage_example);
pricePair124hPercentage.setTextColor(Color.GREEN);
pricePair17dPercentage.setTextColor(Color.GREEN);
pricePair130dPercentage.setTextColor(Color.GREEN);
pricePair224hPercentage.setTextColor(Color.GREEN);
pricePair27dPercentage.setTextColor(Color.GREEN);
pricePair230dPercentage.setTextColor(Color.GREEN);
pricePair324hPercentage.setTextColor(Color.GREEN);
pricePair37dPercentage.setTextColor(Color.GREEN);
pricePair330dPercentage.setTextColor(Color.GREEN);
//Exchange status
exchange1Status.setImageResource(R.drawable.ic_green_circle_48);
exchange2Status.setImageResource(R.drawable.ic_green_circle_48);
@ -189,7 +220,7 @@ public class HomeFragment extends Fragment {
log4Content.setText(R.string.log_example);
// Let's fetch prices
fetchAndDisplayPriceData();
//fetchAndDisplayPriceData();
// Setup task
handler = new Handler();