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适用于对股p市场感兴趣的用户,他们希望及时了解股p行情,管理个人关注的股p,并在重要价格点获得提醒。
WebSocket 是一种在客户端和服务器之间进行全双工通信的协议。可以实现低延迟的数据交换,非常适合实时股p行情的推送。
RecyclerView 是 Android 中显示大量数据的组件。通过 Adapter 和 ViewHolder 模式,可以高效地更新数据显示。
NotificationManager 用于在系统状态栏显示通知。当股p价格触发用户设定的条件时,会发送通知提醒用户。
graph TD;
A[启动应用] --> B[建立 WebSocket 连接]
B --> C[接收实时股p数据]
C --> D[更新 RecyclerView 显示数据]
D --> E{检查自选股价格}
E -- 达到提醒价格 --> F[发送通知]
E -- 未达到提醒价格 --> G[继续接收数据]
F --> G
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.WebSocket;
import okhttp3.WebSocketListener;
public class StockWebSocketListener extends WebSocketListener {
private static final int NORMAL_CLOSURE_STATUS = 1000;
@Override
public void onOpen(WebSocket webSocket, Response response) {
webSocket.send("SUBSCRIBE STOCKS");
}
@Override
public void onMessage(WebSocket webSocket, String text) {
// Handle the incoming stock data
}
@Override
public void onClosing(WebSocket webSocket, int code, String reason) {
webSocket.close(NORMAL_CLOSURE_STATUS, null);
}
@Override
public void onFailure(WebSocket webSocket, Throwable t, Response response) {
t.printStackTrace();
}
}
// Usage in your main activity or service
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url("wss://your.websocket.url").build();
StockWebSocketListener listener = new StockWebSocketListener();
WebSocket ws = client.newWebSocket(request, listener);
client.dispatcher().executorService().shutdown();
public class StockAdapter extends RecyclerView.Adapter<StockAdapter.StockViewHolder> {
private List<Stock> stockList;
public StockAdapter(List<Stock> stockList) {
this.stockList = stockList;
}
@NonNull
@Override
public StockViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.stock_item, parent, false);
return new StockViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull StockViewHolder holder, int position) {
Stock stock = stockList.get(position);
holder.bind(stock);
}
@Override
public int getItemCount() {
return stockList.size();
}
public void updateStocks(List<Stock> newStockList) {
this.stockList = newStockList;
notifyDataSetChanged();
}
class StockViewHolder extends RecyclerView.ViewHolder {
TextView stockName;
TextView stockPrice;
StockViewHolder(View itemView) {
super(itemView);
stockName = itemView.findViewById(R.id.stock_name);
stockPrice = itemView.findViewById(R.id.stock_price);
}
void bind(Stock stock) {
stockName.setText(stock.getName());
stockPrice.setText(String.valueOf(stock.getPrice()));
}
}
}
private void sendNotification(String stockName, double currentPrice) {
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
String channelId = "stock_channel_id";
CharSequence name = "Stock Notification Channel";
String description = "Channel for stock price notifications";
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(channelId, name, importance);
channel.setDescription(description);
notificationManager.createNotificationChannel(channel);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channelId)
.setSmallIcon(R.drawable.ic_stock_notification)
.setContentTitle("Stock Price Alert")
.setContentText(stockName + " has reached $" + currentPrice)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
notificationManager.notify(1, builder.build());
}
测试代码应包括单元测试和集成测试:
@Test
public void testWebSocketConnection() {
// Write test cases to ensure WebSocket connection is established successfully
}
@Test
public void testRecyclerViewUpdate() {
// Simulate receiving stock data and check if RecyclerView updates correctly
}
@Test
public void testNotificationTrigger() {
// Simulate stock price reaching threshold and check if a notification is sent
}
部署该应用主要涉及以下几个步骤:
.hap
文件。这款股p行情应用利用 WebSocket 实现了实时数据更新,通过 RecyclerView 动态显示数据,并借助 NotificationManager 提供价格提醒功能,为用户提供了便捷的股p管理体验。
未来可以进一步优化:
通过不断完善和更新,使应用更加智能和易用,满足用户不断变化的需求。