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maps navigation with camera google maps

Paval EP answered on July 5, 2023 Popularity 1/10 Helpfulness 1/10

answer maps navigation with camera google maps

maps navigation with camera google maps

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import React, { useEffect, useState, useRef } from 'react';
import { View, Text, Image, TouchableOpacity } from 'react-native';
import MapView, { Polyline, Marker } from 'react-native-maps';
import Geolocation from '@react-native-community/geolocation';

interface Coordinate {
  latitude: number;
  longitude: number;
}

interface Step {
  instructions: string;
  distance: number;
  duration: number;
  maneuver: string;
  start_location: Coordinate;
  end_location: Coordinate;
  polyline: { points: string; coordinates: Coordinate[] };
}

const MapScreen: React.FC = () => {
  const [currentLocation, setCurrentLocation] = useState<Coordinate | null>(
    null
  );
  const [routeCoordinates, setRouteCoordinates] = useState<Coordinate[]>([]);
  const [steps, setSteps] = useState<Step[]>([]);
  const [remainingSteps, setRemainingSteps] = useState<Step[]>([]);
  const [distance, setDistance] = useState<number | null>(null);
  const [duration, setDuration] = useState<number | null>(null);
  const [arrowRotation, setArrowRotation] = useState<number>(0);
  const mapRef = useRef<MapView>(null);

  useEffect(() => {
    // Get the current location and update the state
    Geolocation.watchPosition(
      (position) => {
        const { latitude, longitude } = position.coords;
        setCurrentLocation({ latitude, longitude });
      },
      (error) => console.log(error),
      {
        enableHighAccuracy: true,
        timeout: 20000,
        maximumAge: 1000,
        distanceFilter: 10,
      }
    );
  }, []);

  useEffect(() => {
    // Update the map based on the current location and route data
    // Update the route coordinates, steps, remaining steps, distance, and duration

    // Update the arrow rotation based on the current location and route coordinates
    // Example code to update arrow rotation randomly
    const randomRotation = Math.floor(Math.random() * 360);
    setArrowRotation(randomRotation);
  }, [currentLocation, routeCoordinates, steps]);

  const onRegionChange = (region: any) => {
    // Handle the region change if needed
  };

  const recenterMap = () => {
    // Recenter the map on the current location
    if (currentLocation && mapRef.current) {
      mapRef.current.animateToRegion({
        latitude: currentLocation.latitude,
        longitude: currentLocation.longitude,
        latitudeDelta: 0.0922,
        longitudeDelta: 0.0421,
      });
    }
  };

  return (
    <View style={{ flex: 1 }}>
      <MapView
        ref={mapRef}
        style={{ flex: 1 }}
        initialRegion={{
          latitude: currentLocation?.latitude || 0,
          longitude: currentLocation?.longitude || 0,
          latitudeDelta: 0.0922,
          longitudeDelta: 0.0421,
        }}
        showsUserLocation={true}
        onRegionChange={onRegionChange}
      >
        {/* Render the route coordinates as a Polyline */}
        {routeCoordinates.length > 0 && (
          <Polyline
            coordinates={routeCoordinates}
            strokeWidth={3}
            strokeColor="#1a73e8"
          />
        )}

        {/* Render the remaining steps as Polylines */}
        {remainingSteps.length > 0 &&
          remainingSteps.map((step, index) => (
            <Polyline
              key={index}
              coordinates={step.polyline.coordinates}
              strokeWidth={3}
              strokeColor="#1a73e8"
            />
          ))}

        {/* Render the current location marker with arrow icon */}
        {currentLocation && (
          <Marker coordinate={currentLocation}>
            <Image
              source={require('../../utils/Images/arrow.png')}
              style={{ width: 32, height: 32, transform: [{ rotate: `${arrowRotation}deg` }] }}
            />
          </Marker>
        )}
      </MapView>

      {/* Recenter button */}
      <TouchableOpacity
        style={{
          position: 'absolute',
          top: 16,
          right: 16,
          backgroundColor: 'white',
          padding: 8,
          borderRadius: 4,
        }}
        onPress={recenterMap}
      >
        <Image
          source={require('../../utils/Images/location.png')}
          style={{ width: 32, height: 32 }}
        />
      </TouchableOpacity>

      {/* Distance and duration information */}
      <View
        style={{
          position: 'absolute',
          bottom: 0,
          left: 0,
          right: 0,
          backgroundColor: '#FFF',
          padding: 16,
        }}
      >
        <Text>Distance: {distance} meters</Text>
        <Text>Duration: {duration} seconds</Text>
      </View>
    </View>
  );
};

export default MapScreen;

Popularity 1/10 Helpfulness 1/10 Language whatever

Source: chat.openai.com

Tags: camera google-maps maps navigation whatever

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Contributed on Jul 05 2023

Paval EP

0 Answers Avg Quality 2/10

maps navigation with camera google maps

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