App

public class MainActivity extends AppCompatActivity {
    // Define your variables here
    private SignalStrengthMonitor signalStrengthMonitor;
    private DataAnalyzer dataAnalyzer;
    private AlertSystem alertSystem;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Initialize your variables here
        signalStrengthMonitor = new SignalStrengthMonitor();
        dataAnalyzer = new DataAnalyzer();
        alertSystem = new AlertSystem();

        // Start monitoring signal strength
        signalStrengthMonitor.startMonitoring();

        // Analyze historical data to improve prediction accuracy
        dataAnalyzer.analyzeHistoricalData();
    }

    public void onSignalStrengthChanged(int newSignalStrength) {
        // Predict connection loss
        boolean isConnectionLossImminent = dataAnalyzer.predictConnectionLoss(newSignalStrength);

        // If connection loss is predicted, alert the user
        if (isConnectionLossImminent) {
            alertSystem.sendAlert();
        }
    }

    public void updateSignalStrength() {
        // Get the current signal strength
        int signalStrength = signalStrengthMonitor.getSignalStrength();

        // Call the method to handle signal strength change
        onSignalStrengthChanged(signalStrength);
    }
}

public class SignalStrengthMonitor {
    // This class will handle monitoring of the device's signal strength

    public void startMonitoring() {
        // Code to start monitoring signal strength
    }

    public int getSignalStrength() {
        // Code to return the current signal strength
        return 0; // Placeholder
    }
}

public class DataAnalyzer {
    // This class will handle all data analysis, including prediction of connection loss

    public void analyzeHistoricalData() {
        // Code to analyze historical data
    }

    public boolean predictConnectionLoss(int signalStrength) {
        // Code to predict connection loss based on current signal strength and historical data
        return false; // Placeholder
    }
}

public class AlertSystem {
    // This class will handle sending alerts to the user

    public void sendAlert() {
        // Code to send an alert to the user
    }
}