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

Drawing search area

activity_finger_drag_draw
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:mapbox_cameraTargetLat="35.087497"
mapbox:mapbox_cameraZoom="11.679132"
mapbox:mapbox_cameraTargetLng="-106.651261"/>
<com.getbase.floatingactionbutton.FloatingActionsMenu
android:id="@+id/multiple_actions_parent_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="16dp"
fab:fab_addButtonColorNormal="@color/mapboxRed"
fab:fab_addButtonColorPressed="@color/mapboxWhite"
fab:fab_addButtonPlusIconColor="@color/mapboxWhite"
fab:fab_labelStyle="@style/menu_labels_style">
<com.getbase.floatingactionbutton.FloatingActionButton
android:id="@+id/switch_to_single_line_only_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fab:fab_colorNormal="@color/mapboxOrange"
fab:fab_colorPressed="@color/mapboxWhite"
fab:fab_size="mini"
fab:fab_title="@string/toggle_straight_line_drawing"/>
<com.getbase.floatingactionbutton.FloatingActionButton
android:id="@+id/clear_map_for_new_draw_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fab:fab_colorNormal="@color/mapboxBlue"
fab:fab_colorPressed="@color/mapboxWhite"
fab:fab_size="mini"
fab:fab_title="@string/clear_map"/>
<com.getbase.floatingactionbutton.FloatingActionButton
android:id="@+id/show_search_data_points_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
fab:fab_colorNormal="@color/mapboxGreen"
fab:fab_colorPressed="@color/mapboxWhite"
fab:fab_size="mini"
fab:fab_title="@string/toggle_search_data_points_title"/>
</com.getbase.floatingactionbutton.FloatingActionsMenu>
</FrameLayout>
FingerDrawQueryActivity.java
package com.mapbox.mapboxandroiddemo.examples.query;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.PointF;
import android.os.AsyncTask;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
import com.mapbox.geojson.LineString;
import com.mapbox.geojson.Point;
import com.mapbox.geojson.Polygon;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
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.FillLayer;
import com.mapbox.mapboxsdk.style.layers.Layer;
import com.mapbox.mapboxsdk.style.layers.LineLayer;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.turf.TurfJoins;
import java.io.InputStream;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import timber.log.Timber;
import static com.mapbox.mapboxsdk.style.layers.Property.LINE_JOIN_ROUND;
import static com.mapbox.mapboxsdk.style.layers.Property.NONE;
import static com.mapbox.mapboxsdk.style.layers.Property.VISIBLE;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillOpacity;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconIgnorePlacement;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconOffset;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineJoin;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineOpacity;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.lineWidth;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.visibility;
/**
* Use the Android system {@link android.view.View.OnTouchListener} to draw
* an polygon and/or a line. Also perform a search for data points within the drawn polygon area.
*/
public class FingerDrawQueryActivity extends AppCompatActivity {
private static final String SEARCH_DATA_SYMBOL_LAYER_SOURCE_ID = "SEARCH_DATA_SYMBOL_LAYER_SOURCE_ID";
private static final String FREEHAND_DRAW_LINE_LAYER_SOURCE_ID = "FREEHAND_DRAW_LINE_LAYER_SOURCE_ID";
private static final String MARKER_SYMBOL_LAYER_SOURCE_ID = "MARKER_SYMBOL_LAYER_SOURCE_ID";
private static final String FREEHAND_DRAW_FILL_LAYER_SOURCE_ID = "FREEHAND_DRAW_FILL_LAYER_SOURCE_ID";
private static final String FREEHAND_DRAW_LINE_LAYER_ID = "FREEHAND_DRAW_LINE_LAYER_ID";
private static final String FREEHAND_DRAW_FILL_LAYER_ID = "FREEHAND_DRAW_FILL_LAYER_ID";
private static final String SEARCH_DATA_SYMBOL_LAYER_ID = "SEARCH_DATA_SYMBOL_LAYER_ID";
private static final String SEARCH_DATA_MARKER_ID = "SEARCH_DATA_MARKER_ID";
private static final String LINE_COLOR = "#a0861c";
private static final float LINE_WIDTH = 5f;
private static final float LINE_OPACITY = 1f;
private static final float FILL_OPACITY = .4f;
private MapView mapView;
private MapboxMap mapboxMap;
private FeatureCollection searchPointFeatureCollection;
private List<Point> freehandTouchPointListForPolygon = new ArrayList<>();
private List<Point> freehandTouchPointListForLine = new ArrayList<>();
private boolean showSearchDataLocations = true;
private boolean drawSingleLineOnly = false;
private View.OnTouchListener customOnTouchListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
LatLng latLngTouchCoordinate = mapboxMap.getProjection().fromScreenLocation(
new PointF(motionEvent.getX(), motionEvent.getY()));
Point screenTouchPoint = Point.fromLngLat(latLngTouchCoordinate.getLongitude(),
latLngTouchCoordinate.getLatitude());
// Draw the line on the map as the finger is dragged along the map
freehandTouchPointListForLine.add(screenTouchPoint);
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
GeoJsonSource drawLineSource = style.getSourceAs(FREEHAND_DRAW_LINE_LAYER_SOURCE_ID);
if (drawLineSource != null) {
drawLineSource.setGeoJson(LineString.fromLngLats(freehandTouchPointListForLine));
}
// Draw a polygon area if drawSingleLineOnly == false
if (!drawSingleLineOnly) {
if (freehandTouchPointListForPolygon.size() < 2) {
freehandTouchPointListForPolygon.add(screenTouchPoint);
} else if (freehandTouchPointListForPolygon.size() == 2) {
freehandTouchPointListForPolygon.add(screenTouchPoint);
freehandTouchPointListForPolygon.add(freehandTouchPointListForPolygon.get(0));
} else {
freehandTouchPointListForPolygon.remove(freehandTouchPointListForPolygon.size() - 1);
freehandTouchPointListForPolygon.add(screenTouchPoint);
freehandTouchPointListForPolygon.add(freehandTouchPointListForPolygon.get(0));
}
}
// Create and show a FillLayer polygon where the search area is
GeoJsonSource fillPolygonSource = style.getSourceAs(FREEHAND_DRAW_FILL_LAYER_SOURCE_ID);
List<List<Point>> polygonList = new ArrayList<>();
polygonList.add(freehandTouchPointListForPolygon);
Polygon drawnPolygon = Polygon.fromLngLats(polygonList);
if (fillPolygonSource != null) {
fillPolygonSource.setGeoJson(drawnPolygon);
}
// Take certain actions when the drawing is done
if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
// If drawing polygon, add the first screen touch point to the end of
// the LineLayer list so that it's
if (!drawSingleLineOnly) {
freehandTouchPointListForLine.add(freehandTouchPointListForPolygon.get(0));
}
if (showSearchDataLocations && !drawSingleLineOnly) {
// Use Turf to calculate the number of data points within a certain Polygon area
FeatureCollection pointsInSearchAreaFeatureCollection =
TurfJoins.pointsWithinPolygon(searchPointFeatureCollection,
FeatureCollection.fromFeature(Feature.fromGeometry(
drawnPolygon)));
// Create a Toast which say show many data points within a certain Polygon area
if (VISIBLE.equals(style.getLayer(
SEARCH_DATA_SYMBOL_LAYER_ID).getVisibility().getValue())) {
Toast.makeText(FingerDrawQueryActivity.this, String.format(
getString(R.string.search_result_size),
pointsInSearchAreaFeatureCollection.features().size()), Toast.LENGTH_SHORT).show();
}
}
if (drawSingleLineOnly) {
Toast.makeText(FingerDrawQueryActivity.this,
getString(R.string.move_map_drawn_line), Toast.LENGTH_SHORT).show();
}
enableMapMovement();
}
}
});
return true;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 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_finger_drag_draw);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
FingerDrawQueryActivity.this.mapboxMap = mapboxMap;
if (showSearchDataLocations) {
new LoadGeoJson(FingerDrawQueryActivity.this).execute();
} else {
setUpExample(null);
}
findViewById(R.id.clear_map_for_new_draw_fab)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Reset ArrayLists
freehandTouchPointListForPolygon = new ArrayList<>();
freehandTouchPointListForLine = new ArrayList<>();
// Add empty Feature array to the sources
GeoJsonSource drawLineSource = style.getSourceAs(FREEHAND_DRAW_LINE_LAYER_SOURCE_ID);
if (drawLineSource != null) {
drawLineSource.setGeoJson(FeatureCollection.fromFeatures(new Feature[]{}));
}
GeoJsonSource fillPolygonSource = style.getSourceAs(FREEHAND_DRAW_FILL_LAYER_SOURCE_ID);
if (fillPolygonSource != null) {
fillPolygonSource.setGeoJson(FeatureCollection.fromFeatures(new Feature[]{}));
}
enableMapDrawing();
}
});
findViewById(R.id.switch_to_single_line_only_fab)
.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
drawSingleLineOnly = !drawSingleLineOnly;
Toast.makeText(FingerDrawQueryActivity.this, String.format(
getString(R.string.now_drawing), drawSingleLineOnly ? getString(R.string.single_line) :
getString(R.string.polygon)), Toast.LENGTH_SHORT).show();
}
});
}
});
}
});
}
/**
* Enable moving the map
*/
private void enableMapMovement() {
mapView.setOnTouchListener(null);
}
/**
* Enable drawing on the map by setting the custom touch listener on the {@link MapView}
*/
private void enableMapDrawing() {
mapView.setOnTouchListener(customOnTouchListener);
}
private void setUpExample(FeatureCollection searchDataFeatureCollection) {
searchPointFeatureCollection = searchDataFeatureCollection;
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style loadedStyle) {
loadedStyle.addImage(SEARCH_DATA_MARKER_ID, BitmapFactory.decodeResource(
FingerDrawQueryActivity.this.getResources(), R.drawable.blue_marker_view));
// Add sources to the map
loadedStyle.addSource(new GeoJsonSource(SEARCH_DATA_SYMBOL_LAYER_SOURCE_ID,
searchDataFeatureCollection));
loadedStyle.addSource(new GeoJsonSource(FREEHAND_DRAW_LINE_LAYER_SOURCE_ID));
loadedStyle.addSource(new GeoJsonSource(MARKER_SYMBOL_LAYER_SOURCE_ID));
loadedStyle.addSource(new GeoJsonSource(FREEHAND_DRAW_FILL_LAYER_SOURCE_ID));
loadedStyle.addLayer(new SymbolLayer(SEARCH_DATA_SYMBOL_LAYER_ID,
SEARCH_DATA_SYMBOL_LAYER_SOURCE_ID).withProperties(
iconImage(SEARCH_DATA_MARKER_ID),
iconAllowOverlap(true),
iconOffset(new Float[] {0f, -8f}),
iconIgnorePlacement(true))
);
// Add freehand draw LineLayer to the map
loadedStyle.addLayerBelow(new LineLayer(FREEHAND_DRAW_LINE_LAYER_ID,
FREEHAND_DRAW_LINE_LAYER_SOURCE_ID).withProperties(
lineWidth(LINE_WIDTH),
lineJoin(LINE_JOIN_ROUND),
lineOpacity(LINE_OPACITY),
lineColor(Color.parseColor(LINE_COLOR))), SEARCH_DATA_SYMBOL_LAYER_ID
);
// Add freehand draw polygon FillLayer to the map
loadedStyle.addLayerBelow(new FillLayer(FREEHAND_DRAW_FILL_LAYER_ID,
FREEHAND_DRAW_FILL_LAYER_SOURCE_ID).withProperties(
fillColor(Color.RED),
fillOpacity(FILL_OPACITY)), FREEHAND_DRAW_LINE_LAYER_ID
);
enableMapDrawing();
findViewById(R.id.show_search_data_points_fab).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
showSearchDataLocations = !showSearchDataLocations;
// Toggle the visibility of the fake data point SymbolLayer icons
Layer dataLayer = loadedStyle.getLayer(SEARCH_DATA_SYMBOL_LAYER_ID);
if (dataLayer != null) {
dataLayer.setProperties(
VISIBLE.equals(dataLayer.getVisibility().getValue()) ? visibility(NONE) : visibility(VISIBLE));
}
}
});
Toast.makeText(FingerDrawQueryActivity.this,
getString(R.string.draw_instruction), Toast.LENGTH_SHORT).show();
}
});
}
/**
* Use an AsyncTask to retrieve GeoJSON data from a file in the assets folder.
*/
private static class LoadGeoJson extends AsyncTask<Void, Void, FeatureCollection> {
private WeakReference<FingerDrawQueryActivity> weakReference;
LoadGeoJson(FingerDrawQueryActivity activity) {
this.weakReference = new WeakReference<>(activity);
}
@Override
protected FeatureCollection doInBackground(Void... voids) {
try {
FingerDrawQueryActivity activity = weakReference.get();
if (activity != null) {
InputStream inputStream = activity.getAssets().open("albuquerque_locations.geojson");
return FeatureCollection.fromJson(convertStreamToString(inputStream));
}
} catch (Exception exception) {
Timber.e("Exception Loading GeoJSON: %s", exception.toString());
}
return null;
}
static String convertStreamToString(InputStream is) {
Scanner scanner = new Scanner(is).useDelimiter("\\A");
return scanner.hasNext() ? scanner.next() : "";
}
@Override
protected void onPostExecute(@Nullable FeatureCollection featureCollection) {
super.onPostExecute(featureCollection);
FingerDrawQueryActivity activity = weakReference.get();
if (activity != null && featureCollection != null) {
activity.setUpExample(featureCollection);
}
}
}
// 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();
mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}
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