Examples
Getting started (3)Create a simple map viewDynamically build a map viewSupport map fragmentDynamic styling (30)HillshadingAdd a vector tile sourceAdd a new layer below labelsAnimate marker positionAdjust a layer's opacityShow time lapseAnimated image source (GIF)Icon update based on API responseChange a layer's colorChange a map's languageColor dependent on zoom levelClick to add photoIndoor MapMarker following routeStyle with missing iconSymbol layer iconsPicture in picturePulsing layer opacityAdd a WMS sourceText anchor positionButton interaction stylingOpacity fadeShow and hide layersSymbolLayer iconsAdjust text labelsMultiple text formatsTransparent render surfaceUse an image sourceAnimated icon movementVariable label placementExtrusions (5)Adjust light location and colorDisplay 3D building height based on vector dataExtrude polygons for 3D indoor mappingRotate and tilt with 3D buildingsUse GeoJSON data to set extrusion heightCamera (5)Animate the map cameraFit camera in bounding boxRestrict map panningRotating cameraZoom to show a cluster's leavesData visualization (33)Baseball spray chartDisplay water depthBiometric fingerprintCalendar integrationCircle icon toggleCircleLayer clustersCircle radiusCircle to icon transitionCreate a line layerCreate hotspots from pointsData time lapseShow heatmap dataDraw a GeoJSON lineDraw a polygon with holesDraw a polygonDraw multiple geometriesJoin local JSON data with vector tile geometriesLine gradientLine behind moving iconMultiple expressionsIcon setting based on Feature propertyOutlined polygon holeSatellite land selectShared preferencesSpinning iconStyle circles categoricallyStyle lines using an identity property functionToggle collision detectionSymbolLayer clusteringSymbol layer info windowZoom-based icon switchUpdate a choropleth layer by zoom levelStyling heatmapsOffline (3)Cache managementA simple offline mapOffline managerQuerying the map (3)Building outlineQuery a map featureSelect a buildingMap style (4)Style attributionLocal style or custom raster styleDefault stylesMapbox Studio styleUser interaction (12)Click on single layerFeature countDrawing search areaHighlighted lineSymbol layer icon size changeInset mapLocation pickerBackground fogRecyclerView DirectionsSearch again in an areaSnaking directionsRecyclerView interactionImage generation (2)Snapshot NotificationShare snapshot imageDevice location (7)Track device locationBasic pulsing locationLocation camera optionsCustom pulsing locationCustomized location iconShow a user's location on a map fragmentShow a user's location

Shared preferences

activity_lab_shared_preferences
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".examples.basics.SimpleMapViewActivity">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
mapbox:layout_constraintGuide_begin="512dp" />
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="0dp"
mapbox:layout_constraintBottom_toTopOf="@+id/guideline10"
mapbox:layout_constraintEnd_toEndOf="parent"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/shared_pref_saved_lat_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginLeft="32dp"
android:layout_marginTop="24dp"
android:text="@string/saved_lat_textview"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="@+id/guideline10" />
<TextView
android:id="@+id/shared_pref_saved_long_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginLeft="32dp"
android:layout_marginTop="24dp"
android:text="@string/saved_long_textview"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toBottomOf="@+id/shared_pref_saved_lat_textview" />
</androidx.constraintlayout.widget.ConstraintLayout>
SharedPreferencesActivity.java
package com.mapbox.mapboxandroiddemo.examples.labs;
import android.content.SharedPreferences;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.widget.TextView;
import android.widget.Toast;
import com.mapbox.geojson.Point;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraPosition;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.layers.PropertyFactory;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconOffset;
/**
* Use shared preferences to save and retrieve data, so that the data can be displayed after closing the app.
*/
public class SharedPreferencesActivity extends AppCompatActivity implements OnMapReadyCallback,
MapboxMap.OnMapClickListener {
private static final String SAVED_LAT_KEY = "SAVED_LAT_KEY";
private static final String SAVED_LONG_KEY = "SAVED_LONG_KEY";
private static final String CLICK_LOCATION_SOURCE_ID = "CLICK_LOCATION_SOURCE_ID";
private static final String CLICK_LOCATION_ICON_ID = "CLICK_LOCATION_ICON_ID";
private static final String CLICK_LOCATION_LAYER_ID = "CLICK_LOCATION_LAYER_ID";
private MapView mapView;
private MapboxMap mapboxMap;
private SharedPreferences sharedPreferences;
private TextView longTextView;
private TextView latTextView;
private double savedLat;
private double savedLong;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the mapview.
Mapbox.getInstance(this, getString(R.string.access_token));
// This contains the MapView in XML and needs to be called after the access token is configured.
setContentView(R.layout.activity_lab_shared_preferences);
longTextView = findViewById(R.id.shared_pref_saved_long_textview);
latTextView = findViewById(R.id.shared_pref_saved_lat_textview);
longTextView.setText(String.format(getString(R.string.saved_long_textview), String.valueOf(0)));
latTextView.setText(String.format(getString(R.string.saved_lat_textview), String.valueOf(0)));
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull MapboxMap mapboxMap) {
SharedPreferencesActivity.this.mapboxMap = mapboxMap;
mapboxMap.setStyle(
// Set the map to Mapbox's daytime traffic style
new Style.Builder().fromUri(Style.TRAFFIC_DAY)
// Add the SymbolLayer icon image to the map style
.withImage(CLICK_LOCATION_ICON_ID, BitmapFactory.decodeResource(
SharedPreferencesActivity.this.getResources(), R.drawable.red_marker))
// Adding a GeoJson source for the SymbolLayer icons.
.withSource(new GeoJsonSource(CLICK_LOCATION_SOURCE_ID))
// Adding the actual SymbolLayer to the map style. An offset is added that the bottom of the red
// marker icon gets fixed to the coordinate, rather than the middle of the icon being fixed to
// the coordinate point. This is offset is not always needed and is dependent on the image
// that you use for the SymbolLayer icon.
.withLayer(new SymbolLayer(CLICK_LOCATION_LAYER_ID, CLICK_LOCATION_SOURCE_ID)
.withProperties(PropertyFactory.iconImage(CLICK_LOCATION_ICON_ID),
iconAllowOverlap(true),
iconOffset(new Float[] {0f, -9f}))
), new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
mapboxMap.addOnMapClickListener(SharedPreferencesActivity.this);
// Get the coordinates from shared preferences
savedLong = getCoordinateFromSharedPref(SAVED_LONG_KEY);
savedLat = getCoordinateFromSharedPref(SAVED_LAT_KEY);
// Coordinates haven't been saved if both == 0
if (savedLong == 0 && savedLat == 0) {
Toast.makeText(SharedPreferencesActivity.this,
getString(R.string.tap_on_map_save_to_shared_pref), Toast.LENGTH_SHORT).show();
longTextView.setText(String.format(getString(R.string.saved_long_textview),
getString(R.string.not_saved_yet)));
latTextView.setText(String.format(getString(R.string.saved_lat_textview),
getString(R.string.not_saved_yet)));
} else {
// Move the camera to the previously-saved coordinates
mapboxMap.animateCamera(CameraUpdateFactory
.newCameraPosition(new CameraPosition.Builder()
.target(new LatLng(savedLat, savedLong))
.zoom(4)
.build()), 1200);
Toast.makeText(SharedPreferencesActivity.this,
getString(R.string.shared_pref_marker_placement), Toast.LENGTH_SHORT).show();
// Move the marker to the previously-saved coordinates
moveMarkerToLngLat(savedLong, savedLat);
longTextView.setText(String.format(
getString(R.string.saved_long_textview), String.valueOf(savedLong)));
latTextView.setText(String.format(
getString(R.string.saved_lat_textview), String.valueOf(savedLat)));
}
}
});
}
@Override
public boolean onMapClick(@NonNull LatLng mapClickPoint) {
double clickLatitude = mapClickPoint.getLatitude();
double clickLongitude = mapClickPoint.getLongitude();
longTextView.setText(String.format(
getString(R.string.saved_long_textview), String.valueOf(clickLongitude)));
latTextView.setText(String.format(
getString(R.string.saved_lat_textview), String.valueOf(clickLatitude)));
// Save the map click point coordinates to shared preferences
if (sharedPreferences != null) {
putCoordinateToSharedPref(SAVED_LAT_KEY, clickLatitude);
putCoordinateToSharedPref(SAVED_LONG_KEY, clickLongitude);
}
// Move the marker to the newly-saved coordinates
moveMarkerToLngLat(clickLongitude, clickLatitude);
return true;
}
/**
* Move the SymbolLayer icon to a new location
*
* @param newLong the new longitude
* @param newLat the new latitude
*/
private void moveMarkerToLngLat(double newLong, double newLat) {
// Move and display the click center layer's red marker icon to
// wherever the map was clicked on
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
GeoJsonSource clickLocationSource = style.getSourceAs(CLICK_LOCATION_SOURCE_ID);
if (clickLocationSource != null) {
clickLocationSource.setGeoJson(Point.fromLngLat(newLong, newLat));
}
}
});
}
/**
* Save a specific number to shared preferences
*
* @param key the number's key
* @param value the actual number
*/
private void putCoordinateToSharedPref(final String key, final double value) {
sharedPreferences.edit().putLong(key, Double.doubleToRawLongBits(value)).apply();
}
/**
* Retrieve a specific number from shared preferences
*
* @param key the key to use for retrieval
* @return the saved number
*/
double getCoordinateFromSharedPref(final String key) {
return Double.longBitsToDouble(sharedPreferences.getLong(key, 0));
}
// Add the mapView lifecycle to the activity's lifecycle methods
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mapboxMap != null) {
mapboxMap.removeOnMapClickListener(this);
}
mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}
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