[android] Create example for marker not updating bug

example/App.js

@@ -35,6 +35,7 @@ import MapStyle from './examples/MapStyle';
 import LegalLabel from './examples/LegalLabel';
 import SetNativePropsOverlays from './examples/SetNativePropsOverlays';
 import CustomOverlay from './examples/CustomOverlay';
+import BugMarkerWontUpdate from './examples/BugMarkerWontUpdate';
 
 const IOS = Platform.OS === 'ios';
 const ANDROID = Platform.OS === 'android';
@@ -148,6 +149,7 @@ class App extends React.Component {
       [LegalLabel, 'Reposition the legal label', true],
       [SetNativePropsOverlays, 'Update native props', true],
       [CustomOverlay, 'Custom Overlay Component', true],
+      [BugMarkerWontUpdate, 'BUG: Marker Won\'t Update (Android)', true],
     ]
     // Filter out examples that are not yet supported for Google Maps on iOS.
     .filter(example => ANDROID || (IOS && (example[2] || !this.state.useGoogleMaps)))

example/examples/BugMarkerWontUpdate.js

@@ -0,0 +1,134 @@
+import React from 'react';
+import {
+  StyleSheet,
+  View,
+  Text,
+  Dimensions,
+  TouchableOpacity,
+} from 'react-native';
+import MapView from 'react-native-maps';
+import MyLocationMapMarker from './MyLocationMapMarker';
+
+const { width, height } = Dimensions.get('window');
+
+const ASPECT_RATIO = width / height;
+const LATITUDE = 37.78825;
+const LONGITUDE = -122.4324;
+const LATITUDE_DELTA = 0.0922;
+const LONGITUDE_DELTA = LATITUDE_DELTA * ASPECT_RATIO;
+
+class BugMarkerWontUpdate extends React.Component {
+  constructor(props) {
+    super(props);
+
+    this.state = {
+      region: {
+        latitude: LATITUDE,
+        longitude: LONGITUDE,
+        latitudeDelta: LATITUDE_DELTA,
+        longitudeDelta: LONGITUDE_DELTA,
+      },
+      coordinate: {
+        latitude: LATITUDE,
+        longitude: LONGITUDE,
+      },
+      amount: 0,
+      enableHack: false,
+    };
+  }
+
+  increment() {
+    this.setState({ amount: this.state.amount + 10 });
+  }
+
+  decrement() {
+    this.setState({ amount: this.state.amount - 10 });
+  }
+
+  toggleHack() {
+    this.setState({ enableHack: !this.state.enableHack });
+  }
+
+  render() {
+    return (
+      <View style={styles.container}>
+        <MapView
+          provider={this.props.provider}
+          style={styles.map}
+          initialRegion={this.state.region}
+        >
+          <MyLocationMapMarker
+            coordinate={this.state.coordinate}
+            heading={this.state.amount}
+            enableHack={this.state.enableHack}
+          />
+        </MapView>
+        <View style={styles.buttonContainer}>
+          <TouchableOpacity
+            onPress={() => this.toggleHack()}
+            style={[styles.bubble, styles.button, styles.hackButton]}
+          >
+            <Text style={{ fontSize: 12, fontWeight: 'bold' }}>
+              {this.state.enableHack ? 'Disable Hack' : 'Enable Hack'}
+            </Text>
+          </TouchableOpacity>
+        </View>
+        <View style={styles.buttonContainer}>
+          <TouchableOpacity
+            onPress={() => this.decrement()}
+            style={[styles.bubble, styles.button]}
+          >
+            <Text style={{ fontSize: 20, fontWeight: 'bold' }}>-</Text>
+          </TouchableOpacity>
+          <TouchableOpacity
+            onPress={() => this.increment()}
+            style={[styles.bubble, styles.button]}
+          >
+            <Text style={{ fontSize: 20, fontWeight: 'bold' }}>+</Text>
+          </TouchableOpacity>
+        </View>
+      </View>
+    );
+  }
+}
+
+BugMarkerWontUpdate.propTypes = {
+  provider: MapView.ProviderPropType,
+};
+
+const styles = StyleSheet.create({
+  container: {
+    ...StyleSheet.absoluteFillObject,
+    justifyContent: 'flex-end',
+    alignItems: 'center',
+  },
+  map: {
+    ...StyleSheet.absoluteFillObject,
+  },
+  bubble: {
+    backgroundColor: 'rgba(255,255,255,0.7)',
+    paddingHorizontal: 18,
+    paddingVertical: 12,
+    borderRadius: 20,
+  },
+  latlng: {
+    width: 200,
+    alignItems: 'stretch',
+  },
+  button: {
+    width: 80,
+    paddingHorizontal: 12,
+    alignItems: 'center',
+    marginHorizontal: 10,
+  },
+  hackButton: {
+    width: 200,
+  },
+  buttonContainer: {
+    flexDirection: 'row',
+    marginVertical: 20,
+    backgroundColor: 'transparent',
+  },
+});
+
+module.exports = BugMarkerWontUpdate;

example/examples/MyLocationMapMarker.js

@@ -0,0 +1,179 @@
+import React, { PropTypes } from 'react';
+import {
+  StyleSheet,
+  Text,
+  View,
+  PermissionsAndroid,
+  Platform,
+} from 'react-native';
+import MapView from 'react-native-maps';
+import isEqual from 'lodash/isEqual';
+
+const GEOLOCATION_OPTIONS = { enableHighAccuracy: true, timeout: 20000, maximumAge: 1000 };
+const ANCHOR = { x: 0.5, y: 0.5 };
+
+const colorOfmyLocationMapMarker = 'blue';
+
+const propTypes = {
+  ...MapView.Marker.propTypes,
+  // override this prop to make it optional
+  coordinate: PropTypes.shape({
+    latitude: PropTypes.number.isRequired,
+    longitude: PropTypes.number.isRequired,
+  }),
+  children: PropTypes.node,
+  geolocationOptions: PropTypes.shape({
+    enableHighAccuracy: PropTypes.bool,
+    timeout: PropTypes.number,
+    maximumAge: PropTypes.number,
+  }),
+  heading: PropTypes.number,
+  enableHack: PropTypes.bool,
+};
+
+const defaultProps = {
+  enableHack: false,
+  geolocationOptions: GEOLOCATION_OPTIONS,
+};
+
+export default class MyLocationMapMarker extends React.PureComponent {
+  constructor(props) {
+    super(props);
+    this.mounted = false;
+    this.state = {
+      myPosition: null,
+    };
+  }
+  componentDidMount() {
+    this.mounted = true;
+    // If you supply a coordinate prop, we won't try to track location automatically
+    if (this.props.coordinate) return;
+
+    if (Platform.OS === 'android') {
+      PermissionsAndroid.requestPermission(PermissionsAndroid.PERMISSIONS.ACCESS_FINE_LOCATION)
+        .then(granted => {
+          if (granted && this.mounted) this.watchLocation();
+        });
+    } else {
+      this.watchLocation();
+    }
+  }
+  watchLocation() {
+    // eslint-disable-next-line no-undef
+    this.watchID = navigator.geolocation.watchPosition((position) => {
+      const myLastPosition = this.state.myPosition;
+      const myPosition = position.coords;
+      if (!isEqual(myPosition, myLastPosition)) {
+        this.setState({ myPosition });
+      }
+    }, null, this.props.geolocationOptions);
+  }
+  componentWillUnmount() {
+    this.mounted = false;
+    // eslint-disable-next-line no-undef
+    if (this.watchID) navigator.geolocation.clearWatch(this.watchID);
+  }
+  render() {
+    let { heading, coordinate } = this.props;
+    if (!coordinate) {
+      const { myPosition } = this.state;
+      if (!myPosition) return null;
+      coordinate = myPosition;
+      heading = myPosition.heading;
+    }
+
+    const rotate = (typeof heading === 'number' && heading >= 0) ? `${heading}deg` : null;
+
+    return (
+      <MapView.Marker
+        anchor={ANCHOR}
+        style={styles.mapMarker}
+        {...this.props}
+        coordinate={coordinate}
+      >
+        <View style={styles.container}>
+          <View style={styles.markerHalo} />
+          {rotate &&
+            <View style={[styles.heading, { transform: [{ rotate }] }]}>
+              <View style={styles.headingPointer} />
+            </View>
+          }
+          <View style={styles.marker}>
+            <Text style={{ width: 0, height: 0 }}>
+              {this.props.enableHack && rotate}
+            </Text>
+          </View>
+        </View>
+        {this.props.children}
+      </MapView.Marker>
+    );
+  }
+}
+
+const SIZE = 35;
+const HALO_RADIUS = 6;
+const ARROW_SIZE = 7;
+const ARROW_DISTANCE = 6;
+const HALO_SIZE = SIZE + HALO_RADIUS;
+const HEADING_BOX_SIZE = HALO_SIZE + ARROW_SIZE + ARROW_DISTANCE;
+
+const styles = StyleSheet.create({
+  mapMarker: {
+    zIndex: 1000,
+  },
+  // The container is necessary to protect the markerHalo shadow from clipping
+  container: {
+    width: HEADING_BOX_SIZE,
+    height: HEADING_BOX_SIZE,
+  },
+  heading: {
+    position: 'absolute',
+    top: 0,
+    left: 0,
+    width: HEADING_BOX_SIZE,
+    height: HEADING_BOX_SIZE,
+    alignItems: 'center',
+  },
+  headingPointer: {
+    width: 0,
+    height: 0,
+    backgroundColor: 'transparent',
+    borderStyle: 'solid',
+    borderTopWidth: 0,
+    borderRightWidth: ARROW_SIZE * 0.75,
+    borderBottomWidth: ARROW_SIZE,
+    borderLeftWidth: ARROW_SIZE * 0.75,
+    borderTopColor: 'transparent',
+    borderRightColor: 'transparent',
+    borderBottomColor: colorOfmyLocationMapMarker,
+    borderLeftColor: 'transparent',
+  },
+  markerHalo: {
+    position: 'absolute',
+    backgroundColor: 'white',
+    top: 0,
+    left: 0,
+    width: HALO_SIZE,
+    height: HALO_SIZE,
+    borderRadius: Math.ceil(HALO_SIZE / 2),
+    margin: (HEADING_BOX_SIZE - HALO_SIZE) / 2,
+    shadowColor: 'black',
+    shadowOpacity: 0.25,
+    shadowRadius: 2,
+    shadowOffset: {
+      height: 0,
+      width: 0,
+    },
+  },
+  marker: {
+    justifyContent: 'center',
+    backgroundColor: colorOfmyLocationMapMarker,
+    width: SIZE,
+    height: SIZE,
+    borderRadius: Math.ceil(SIZE / 2),
+    margin: (HEADING_BOX_SIZE - SIZE) / 2,
+  },
+});
+
+MyLocationMapMarker.propTypes = propTypes;
+MyLocationMapMarker.defaultProps = defaultProps;

example/package.json

@@ -9,6 +9,7 @@
     "dev": "concurrently 'npm run watch' 'npm run packager'"
   },
   "dependencies": {
+    "lodash": "^4.17.2",
     "react": "~15.4.1",
     "react-native": "^0.40.0",
     "react-native-maps": "file:../"