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Custom Map Style

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This example shows how to Switch Runtime Map Style

  1. Location Permissions Handling

  2. Switch Map Style using nextbillionMap.setStyle(new Style.Builder().fromUri(styleUrl))

  3. Tracking Current Location Automatically when MapReady

    1. locationComponent.setLocationComponentEnabled(true);

    2. locationComponent.setRenderMode(RenderMode.COMPASS);

    3. locationComponent.setCameraMode(CameraMode.TRACKING);

For all code examples, refer to Android Maps SDK Code Examples

activity_location_layer_map_change.xml view source

1<?xml version="1.0" encoding="utf-8"?>
2<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
3    xmlns:app="http://schemas.android.com/apk/res-auto"
4    android:id="@+id/coordinator_layout"
5    android:layout_width="match_parent"
6    android:layout_height="match_parent"
7    android:orientation="vertical">
8
9    <ai.nextbillion.maps.core.MapView
10        android:id="@+id/mapView"
11        android:layout_width="match_parent"
12        android:layout_height="match_parent"
13        android:layout_marginBottom="0dp"
14        app:nbmap_uiAttribution="false" />
15
16    <com.google.android.material.floatingactionbutton.FloatingActionButton
17        android:id="@+id/fabStyles"
18        android:layout_width="wrap_content"
19        android:layout_height="wrap_content"
20        android:layout_gravity="end|bottom"
21        android:layout_marginBottom="16dp"
22        android:layout_marginEnd="16dp"
23        android:layout_marginRight="16dp"
24        android:src="@drawable/ic_layers"
25        android:tint="@android:color/white"
26        app:backgroundTint="@color/palette_mint_100"
27        app:layout_anchorGravity="top" />
28
29</androidx.coordinatorlayout.widget.CoordinatorLayout>

CustomMapStyleActivity view source

1package ai.nextbillion;
2
3import android.annotation.SuppressLint;
4import android.os.Bundle;
5import android.widget.Toast;
6
7import com.google.android.material.floatingactionbutton.FloatingActionButton;
8
9import java.util.List;
10
11import ai.nextbillion.maps.camera.CameraPosition;
12import ai.nextbillion.maps.camera.CameraUpdateFactory;
13import ai.nextbillion.maps.core.MapView;
14import ai.nextbillion.maps.core.NextbillionMap;
15import ai.nextbillion.maps.core.OnMapReadyCallback;
16import ai.nextbillion.maps.core.Style;
17import ai.nextbillion.maps.geometry.LatLng;
18import ai.nextbillion.maps.location.LocationComponent;
19import ai.nextbillion.maps.location.LocationComponentActivationOptions;
20import ai.nextbillion.maps.location.LocationComponentOptions;
21import ai.nextbillion.maps.location.modes.CameraMode;
22import ai.nextbillion.maps.location.modes.RenderMode;
23import ai.nextbillion.maps.location.permissions.PermissionsListener;
24import ai.nextbillion.maps.location.permissions.PermissionsManager;
25import androidx.annotation.NonNull;
26import androidx.appcompat.app.AppCompatActivity;
27
28public class CustomMapStyleActivity extends AppCompatActivity implements OnMapReadyCallback {
29
30    private MapView mapView;
31    private NextbillionMap nextbillionMap;
32    private PermissionsManager permissionsManager;
33
34    @Override
35    protected void onCreate(Bundle savedInstanceState) {
36        super.onCreate(savedInstanceState);
37        setContentView(R.layout.activity_location_layer_map_change);
38
39        mapView = findViewById(R.id.mapView);
40        FloatingActionButton stylesFab = findViewById(R.id.fabStyles);
41
42        stylesFab.setOnClickListener(v -> {
43            if (nextbillionMap != null) {
44                toggleMapStyle();
45            }
46        });
47
48        mapView.onCreate(savedInstanceState);
49
50        if (PermissionsManager.areLocationPermissionsGranted(this)) {
51            mapView.getMapAsync(this);
52        } else {
53            permissionsManager = new PermissionsManager(new PermissionsListener() {
54                @Override
55                public void onExplanationNeeded(List<String> permissionsToExplain) {
56                    Toast.makeText(CustomMapStyleActivity.this, "You need to accept location permissions.",
57                            Toast.LENGTH_SHORT).show();
58                }
59
60                @Override
61                public void onPermissionResult(boolean granted) {
62                    if (granted) {
63                        mapView.getMapAsync(CustomMapStyleActivity.this);
64                    } else {
65                        finish();
66                    }
67                }
68            });
69            permissionsManager.requestLocationPermissions(this);
70        }
71    }
72
73    private void toggleMapStyle() {
74        nextbillionMap.getStyle(style -> {
75            String styleUrl = StyleConstants.DARK.equals(style.getUri()) ? StyleConstants.LIGHT : StyleConstants.DARK;
76            nextbillionMap.setStyle(new Style.Builder().fromUri(styleUrl));
77        });
78    }
79
80    @Override
81    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
82        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
83        permissionsManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
84    }
85
86    @Override
87    public void onMapReady(@NonNull NextbillionMap nextbillionMap) {
88        this.nextbillionMap = nextbillionMap;
89        CameraPosition cameraPosition = new CameraPosition.Builder()
90                .target(new LatLng(22.70418008712976, 78.66264025041812))
91                .zoom(6)
92                .tilt(30)
93                .tilt(0)
94                .build();
95        nextbillionMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
96        nextbillionMap.setStyle(new Style.Builder().fromUri(StyleConstants.LIGHT),
97                style -> activateLocationComponent(style));
98    }
99
100    @SuppressLint("MissingPermission")
101    private void activateLocationComponent(@NonNull Style style) {
102        LocationComponent locationComponent = nextbillionMap.getLocationComponent();
103
104        locationComponent.activateLocationComponent(
105                LocationComponentActivationOptions
106                        .builder(this, style)
107                        .useDefaultLocationEngine(true)
108                        .locationComponentOptions(LocationComponentOptions.builder(this)
109                                .pulseEnabled(true)
110                                .build())
111                        .build());
112
113        locationComponent.setLocationComponentEnabled(true);
114        locationComponent.setRenderMode(RenderMode.COMPASS);
115        locationComponent.setCameraMode(CameraMode.TRACKING);
116
117        locationComponent.addOnLocationClickListener(
118                () -> Toast.makeText(this, "Location clicked", Toast.LENGTH_SHORT).show());
119
120        locationComponent.addOnLocationLongClickListener(
121                () -> Toast.makeText(this, "Location long clicked", Toast.LENGTH_SHORT).show());
122    }
123
124    @Override
125    protected void onStart() {
126        super.onStart();
127        mapView.onStart();
128    }
129
130    @Override
131    protected void onResume() {
132        super.onResume();
133        mapView.onResume();
134    }
135
136    @Override
137    protected void onPause() {
138        super.onPause();
139        mapView.onPause();
140    }
141
142    @Override
143    protected void onStop() {
144        super.onStop();
145        mapView.onStop();
146    }
147
148    @Override
149    protected void onSaveInstanceState(Bundle outState) {
150        super.onSaveInstanceState(outState);
151        mapView.onSaveInstanceState(outState);
152    }
153
154    @Override
155    protected void onDestroy() {
156        super.onDestroy();
157        mapView.onDestroy();
158    }
159
160    @Override
161    public void onLowMemory() {
162        super.onLowMemory();
163        mapView.onLowMemory();
164    }
165}

This code is an Android application that demonstrates how to customize the map style and handle location permissions using the Nextbillion Maps SDK. Here's a summary of the code:

Initializing MapView:

  1. The MapView is initialized by calling mapView.onCreate(savedInstanceState).

Location Permissions Handling:

  1. The app checks if location permissions are granted using PermissionsManager.areLocationPermissionsGranted(this). If permissions are granted, the map is asynchronously loaded. Otherwise, the app requests location permissions using the PermissionsManager and handles the permission result in the onPermissionResult callback.

Switch Map Style:

  1. The app provides a floating action button (FAB) to toggle the map style. When the FAB is clicked, the toggleMapStyle() method is called. It gets the current map style using nextbillionMap.getStyle() and switches between a dark and light style by setting the new style using
    1. nextbillionMap.setStyle(new Style.Builder().fromUri(styleUrl)).

Tracking Current Location Automatically:

  1. When the map is ready (onMapReady callback), the camera is positioned to a specific location and zoom level.

  2. The map style is set to the light style, and the location component is activated using nextbillionMap.getLocationComponent().activateLocationComponent().

  3. The location component is configured to use the default location engine and display a pulsing animation.

  4. It is enabled and set to render mode COMPASS and camera mode TRACKING. The location component also listens for click and long-click events on the user's location.

    1. locationComponent.setLocationComponentEnabled(true);
    2. locationComponent.setRenderMode(RenderMode.COMPASS);
    3. locationComponent.setCameraMode(CameraMode.TRACKING);

Additional lifecycle methods are implemented to manage the MapView, including onStart, onResume, onPause, onStop, onSaveInstanceState, onDestroy, and onLowMemory.

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