I want to display overlay component when pressing the map marker. When pressing the button, overlay is showing fine. But when pressing the marker, it is not showing. Can someone let me know about how to display overlay when pressing the map marker.
Here is the code.
const toggleOverlay = () => {
setVisible(!visible);
};
return(
<View style={styles.container}>
<MapView style={styles.map}
showsUserLocation={true}
followUserLocation={true}
zoomEnabled={true}
showsMyLocationButton={true}
initialRegion={ mapRegion}
provider = {PROVIDER_GOOGLE}
showsTraffic={true}
>
{
locationPoints? locationPoints.map((point) => (
<Marker
coordinate={{
longitude: parseFloat(point.PointLongitude),
latitude: parseFloat(point.PointLatitude)
}}
title= {point.name}
pinColor={'blue'}
**onPress={() => (toggleOverlay)}**
>
</Marker>
))
: null}
</MapView>
<Button title="Confirm Address"
**onPress={toggleOverlay}** />
<Overlay isVisible={visible} onBackdropPress={toggleOverlay}>
<Text>Your Address</Text>
<View>
<Text>Address</Text>
</View>
</Overlay>
</View>
);
try, maybe it works)
{
locationPoints? locationPoints.map((point) => (
<Marker
coordinate={{
longitude: parseFloat(point.PointLongitude),
latitude: parseFloat(point.PointLatitude)
}}
title= {point.name}
pinColor={'blue'}
onPress={toggleOverlay}
/>
))
: null
}
hi everyone i'm doing a project and i have a problem in react-native with a piece of code. I have the station status which contains a list of stations that I want to mark (with markers) on the map. How do I use Polyline between one marker and another?
export default class Map extends Component {
constructor(){
super();
this.state=stations:
[{"lat": "45.43331", "lon": "9.241"},
{"lat": "45.4643", "lon": "9.2387"},
{"lat": "45.4847", "lon": "9.23688"},
{"lat": "45.47669", "lon": "9.23217"}]
}
render(){
return(
<View style={styles.container}>
<MapView style={styles.map}
onRegionChange={this.handleRegionChanged}
initialRegion={{
latitude: 45.6835,
longitude: 8.7035,
latitudeDelta: 1,
longitudeDelta: 1,
}}>
<View style={{ position: 'absolute', top: 100, left: 50 }}/>
{this.state.stations.map((marker,item) => (
<MapView.Marker
key={item}
coordinate={{
latitude: Number(marker.lat),
longitude: Number(marker.lon)}}
title={marker.sname}
/>
))}
//this is my problems
{this.state.stations.map((marker,item) => (
<MapView.Polyline
key={item}
coordinates={[{latitude:Number(marker.lat),longitude:Number(marker.lon)}]}
strokeColor="#000" // fallback for when `strokeColors` is not supported by the map-provider
strokeColors={[
'#7F0000',
'#00000000', // no color, creates a "long" gradient between the previous and next coordinate
'#B24112',
'#E5845C',
'#238C23',
'#7F0000'
]}
strokeWidth={4}
/>
))}
</MapView>
</View>
)}
}
}
my code prints the markers correctly but does not draw the lines between one marker and another (with polynes). How can I show on the map the markers corresponding to the stations and draw a line between one marker and another (with Polyline)?
I'm trying to add markers to my map. I want to have all the location data on a separate file so I'm trying to extract the coordinates from my data.json file. The latlng coordinates are in an array in the json file. Am I using the position attribute incorrectly?
render() {
return (
<View style={styles.container}>
<DestinationButton />
<CurrentLocationButton
cb={() => {
this.centerMap();
}}
/>
<MapView
initialRegion={this.state.region}
showsUserLocation={true}
showsCompass={true}
rotateEnabled={false}
ref={(map) => {
this.map = map;
}}
style={{ flex: 1, zIndex: 0 }}
>
{data.features.map((tc) => (
<Marker
key={tc.properties.NAME}
position={{
lat: tc.geometry.coordinates[1],
lng: tc.geometry.coordinates[0],
}}
/>
))}
</MapView>
</View>
);
}
Seems like you are giving a wrong prop to <Marker/> it should be coordinate instead of position. As per docs: https://github.com/react-native-maps/react-native-maps#rendering-a-list-of-markers-on-a-map
<Marker
key={tc.properties.NAME}
coordinate={{
latitude: tc.geometry.coordinates[1],
longitude: tc.geometry.coordinates[0],
}}
/>
I am trying to update the content of a <Callout> tag on a google maps view using the react-native-maps npm package. I would like to dynamically load extra content after a map marker is pressed. I have simplified my code to the example below:-
I have already tried using the tracksInfoWindowChanges attribute on the marker, and the showCallout() method to attempt to manually trigger a re-render. I am using android so the iOS only options such as redrawCallout() method are not available.
const MyMap = (props) => {
const [marker, setMarker] = useState({});
return (
<MapView
showsUserLocation
zoomControlEnabled={true}
zoomEnabled={true}
region={{
latitude: 0,
longitude: 0,
latitudeDelta: 0.03,
longitudeDelta: 0.03,
}}>
<Marker
coordinate={{latitude: 0, longitude: 0}}
onPress={(e) => {
setMarker({ title: 'Test'});
}}>
<View>
<Icon name='key' size={40} color='#384963'</Icon>
</View>
<Callout>
<Text>{marker.title}</Text>
</Callout>
</Marker>
</MapView>
);
}
Is it possible to trigger a re-render of the content after the Callout has been rendered once? From debugging I can see that the component renders after I update my marker state, however the content is not visible until I manually close the Callout and re-opened it.
I am having the exact same problem. The suggestion for android, as per this issue, is to use showCallout(). Below is my work-around for this issue using showCallout():
const MyMap = (props) => {
const [marker, setMarker] = useState({});
let markerRef = useRef(null);
useEffect(() => {
if (markerRef.current) {
markerRef.current.showCallout();
}
})
return (
<MapView
showsUserLocation
zoomControlEnabled={true}
zoomEnabled={true}
region={{
latitude: 0,
longitude: 0,
latitudeDelta: 0.03,
longitudeDelta: 0.03,
}}>
<Marker
ref={markerRef}
coordinate={{latitude: 0, longitude: 0}}
onPress={(e) => {
setMarker({title: `Test ${Math.floor(Math.random() * 10)}`});
}}>
<View>
<Icon name='key' size={40} color='#384963' />
</View>
<Callout>
<Text>{marker.title}</Text>
</Callout>
</Marker>
</MapView>
);
}
Briefly, I added a markerRef and call markerRef.current.showCallout() in useEffect(). What this achieves, if I am not mistaken, is that each time MyMap gets re-rendered, the callout will be forced to show again. I also changed the onPress such that the effect of callout re-rendering is more apparent.
Note 1: Each time the marker is pressed, the callout shall have its text updated.
Note 2: If you have multiple markers and callouts, and you want to update only the callout that is currently in view, you will have to add another check in useEffect(). Something like: if (markerRef.current && selectedMarker === 'markerID') to make sure that only the desired callout is re-rendered continuously.
I've spent about 5 hours trying to get this to work with many different permutations of code, and then rebuilding. I cannot for the life of me change the default "red pointer" marker as the default marker image in react native maps.
import MapView, { PROVIDER_GOOGLE } from 'react-native-maps';
...
<MapView
provider={PROVIDER_GOOGLE}
style={styles.map}
ref={ref => {this.map = ref;}}
minZoomLevel={4} // default => 0
maxZoomLevel={10} // default => 20
enableZoomControl={true}
showsUserLocation = {true}
showsMyLocationButton = {true}
zoomEnabled = {true}
initialRegion={{
latitude: 37.600425,
longitude: -122.385861,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}}
>
<MapView.Marker
coordinate={marker.location}
image={require('./images/test.png')} <------ HERE
width={48}
height={48}
/>
</MapView>
The images definitely exist in the right folder, I've tried different image formats png/gif/jpg/svg, I've tried using {{uri:...}} and icon/image, adding and removing width/height attributes. Nothing seems to work. I'm always getting the default red pointer.
Have I missed something obvious?
The project packager/compiler fails when I require an image that doesn't exist, or an unsupported type. It definitely can see the image, but just doesn't do anything with it. Same results on the emulator and on actual device.
image={require('./images/test.png')}
This line just does nothing, as if it's being ignored somehow.
<MapView
provider={PROVIDER_GOOGLE}
style={styles.container}
region={{
latitude: this.state.latitude,
longitude: this.state.longitude,
}}
>
<Marker
coordinate={{
latitude: this.state.latitude,
longitude: this.state.longitude,
}}
description={"This is a marker in React Natve"}
>
<Image source={require('./man_marker.png')} style={{height: 35, width:35 }} />
</Marker>
</MapView>
There are two solutions:
The first solution (recommended)
Resize your marker image with image editor(such as Photoshop,....) and use as icon in marker
To do this, you can make three photos of different sizes (YOUR_MARKER.png , YOUR_MARKER#2x.png , YOUR_MARKER#3x.png) (React Native automatically displays the appropriate item).
This is a good solution if you have a large number of markers.(You can refer here to clarify this)
<Marker
coordinate={ ... }
tracksViewChanges={false}
icon={require('./YOUR_MARKER.png')}
/>
The second solution
As #shubham-raitka said you can use the Image inside the marker
<Marker
coordinate={ ... }
>
<Image source={require('./YOUR_MARKER.png')} style={{height: 35, width:35 }} />
</Marker>
In this case, if your number of markers is high (about 50 or more) the map performance will be very low.Therefore, it is not recommended to use this method
Here's an approach that worked for me in a similar situation: Use Image in place of Marker. Pop-ups work the same as with a marker. If you try this, Image is imported from react-native. The actual image is imported as:
var dotImage = require('./pathToImage.png')
<Marker
coordinate={meter.latlng}
title={"Parking Meter"}
key={idx}
>
<Image
source={dotImage}
style={{height: 6, width: 6}}
/>
</Marker>
The way you give the width and height is a bit strange, please try with this way.
import MapView, { Marker, PROVIDER_GOOGLE } from 'react-native-maps';
const markerImg = require('./images/test.png'); // <-- create a const with the path of the image
<------
------>
<MapView
provider={PROVIDER_GOOGLE}
style={styles.map}
ref={ref => {this.map = ref;}}
minZoomLevel={4} // default => 0
maxZoomLevel={10} // default => 20
enableZoomControl={true}
showsUserLocation = {true}
showsMyLocationButton = {true}
zoomEnabled = {true}
initialRegion={{
latitude: 37.600425,
longitude: -122.385861,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}}
>
<Marker
image={markerImg} // <----- add this the const with image
onPress={() => this.setState({ marker1: !this.state.marker1 })}
coordinate={{
latitude: 37.600425,
longitude: -122.385861,
}}
centerOffset={{ x: -18, y: -60 }}
anchor={{ x: 0.69, y: 1 }}
/>
</Marker>
</MapView>
I hope it works for you, works for me!
Not enough rep yet to just leave a comment, but the first solution works, I just had to add resizeMode or it cuts off the image if it's bigger.
<Marker
coordinate={ ... }
>
<Image source={require('./YOUR_MARKER.png')} style={{height: 35, width:35, resizeMode:"contain" }} />
</Marker>
<Marker
coordinate={d.driverLocation}
title={d.driverName}
description={d.autoNumber}
onPress={() => console.warn(d.mobaNumbers)}
image={require("../../../assets/bee.png")}
>
</Marker>
Try this it should work
import {Image} from 'react-native';
import MapView, {Marker} from 'react-native-maps';
<MapView
style={styles.mapStyle}
initialRegion={{
latitude: 37.78825,
longitude: -122.4324,
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
}}
customMapStyle={mapStyle}>
<Marker
draggable
coordinate={{
latitude: 37.78825,
longitude: -122.4324,
}}
onDragEnd={e => alert(JSON.stringify(e.nativeEvent.coordinate))}
title={'Test Marker'}
description={'This is a description of the marker'}>
<Image
source={require('./assests/custom_marker.png')}
style={{height: 35, width: 35}}
/>
</Marker>
</MapView>