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added TurfMeasurement distance example
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211 changes: 211 additions & 0 deletions
211
...ain/java/com/mapbox/mapboxandroiddemo/examples/javaservices/TurfLineDistanceActivity.java
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| package com.mapbox.mapboxandroiddemo.examples.javaservices; | ||
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| import android.graphics.Color; | ||
| import android.os.Bundle; | ||
| import android.widget.TextView; | ||
| import android.widget.Toast; | ||
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| import com.mapbox.geojson.Feature; | ||
| import com.mapbox.geojson.LineString; | ||
| import com.mapbox.geojson.Point; | ||
| 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.CircleLayer; | ||
| import com.mapbox.mapboxsdk.style.layers.LineLayer; | ||
| import com.mapbox.mapboxsdk.style.sources.GeoJsonSource; | ||
| import com.mapbox.turf.TurfMeasurement; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
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| import androidx.annotation.NonNull; | ||
| import androidx.appcompat.app.AppCompatActivity; | ||
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| import static com.mapbox.mapboxsdk.style.layers.Property.LINE_JOIN_ROUND; | ||
| import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor; | ||
| import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius; | ||
| 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.lineWidth; | ||
| import static com.mapbox.turf.TurfConstants.UNIT_KILOMETERS; | ||
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| /** | ||
| * Use {@link com.mapbox.turf.TurfMeasurement#distance(Point, Point)} to measure the distance of a drawn line. | ||
| */ | ||
| public class TurfLineDistanceActivity extends AppCompatActivity implements MapboxMap.OnMapClickListener { | ||
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| private static final String SOURCE_ID = "SOURCE_ID"; | ||
| private static final String CIRCLE_LAYER_ID = "CIRCLE_LAYER_ID"; | ||
| private static final String LINE_LAYER_ID = "LINE_LAYER_ID"; | ||
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| // Adjust private static final variables below to change the example's UI | ||
| private static final String STYLE_URI = "mapbox://styles/mapbox/cjv6rzz4j3m4b1fqcchuxclhb"; | ||
| private static final int CIRCLE_COLOR = Color.RED; | ||
| private static final int LINE_COLOR = CIRCLE_COLOR; | ||
| private static final float CIRCLE_RADIUS = 6f; | ||
| private static final float LINE_WIDTH = 4f; | ||
| private static final String DISTANCE_UNITS = UNIT_KILOMETERS; // DISTANCE_UNITS must be equal to a String | ||
| // found in the TurfConstants class | ||
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| private List<Point> pointList = new ArrayList<>(); | ||
| private MapView mapView; | ||
| private MapboxMap mapboxMap; | ||
| private TextView lineLengthTextView; | ||
| private double totalLineDistance = 0; | ||
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| @Override | ||
| protected void onCreate(Bundle savedInstanceState) { | ||
| super.onCreate(savedInstanceState); | ||
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| // 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)); | ||
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| // This contains the MapView in XML and needs to be called after the access token is configured. | ||
| setContentView(R.layout.activity_javaservices_turf_measure_line); | ||
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| mapView = findViewById(R.id.mapView); | ||
| mapView.onCreate(savedInstanceState); | ||
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| mapView.getMapAsync(new OnMapReadyCallback() { | ||
| @Override | ||
| public void onMapReady(@NonNull MapboxMap mapboxMap) { | ||
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| lineLengthTextView = findViewById(R.id.line_length_textView); | ||
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| // DISTANCE_UNITS must be equal to a String found in the TurfConstants class | ||
| lineLengthTextView.setText(String.format(getString(R.string.line_distance_textview), | ||
| DISTANCE_UNITS, String.valueOf(totalLineDistance))); | ||
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| TurfLineDistanceActivity.this.mapboxMap = mapboxMap; | ||
| mapboxMap.setStyle(new Style.Builder() | ||
| .fromUri(STYLE_URI) | ||
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| // Add the source to the map | ||
| .withSource(new GeoJsonSource(SOURCE_ID)) | ||
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| // Style and add the CircleLayer to the map | ||
| .withLayer(new CircleLayer(CIRCLE_LAYER_ID, SOURCE_ID).withProperties( | ||
| circleColor(CIRCLE_COLOR), | ||
| circleRadius(CIRCLE_RADIUS) | ||
| )) | ||
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| // Style and add the LineLayer to the map. The LineLayer is placed below the CircleLayer. | ||
| .withLayerBelow(new LineLayer(LINE_LAYER_ID, SOURCE_ID).withProperties( | ||
| lineColor(LINE_COLOR), | ||
| lineWidth(LINE_WIDTH), | ||
| lineJoin(LINE_JOIN_ROUND) | ||
| ), CIRCLE_LAYER_ID), new Style.OnStyleLoaded() { | ||
| @Override | ||
| public void onStyleLoaded(@NonNull Style style) { | ||
| TurfLineDistanceActivity.this.mapboxMap.addOnMapClickListener(TurfLineDistanceActivity.this); | ||
| Toast.makeText(TurfLineDistanceActivity.this, getString( | ||
| R.string.line_distance_tap_instruction), Toast.LENGTH_SHORT).show(); | ||
| } | ||
| } | ||
| ); | ||
| } | ||
| }); | ||
| } | ||
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| @Override | ||
| public boolean onMapClick(@NonNull LatLng point) { | ||
| addClickPointToLine(point); | ||
| return true; | ||
| } | ||
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| /** | ||
| * Handle the map click location and re-draw the circle and line data. | ||
| * | ||
| * @param clickLatLng where the map was tapped on. | ||
| */ | ||
| private void addClickPointToLine(@NonNull LatLng clickLatLng) { | ||
| mapboxMap.getStyle(new Style.OnStyleLoaded() { | ||
| @Override | ||
| public void onStyleLoaded(@NonNull Style style) { | ||
| // Get the source from the map's style | ||
| GeoJsonSource geoJsonSource = style.getSourceAs(SOURCE_ID); | ||
| if (geoJsonSource != null) { | ||
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| pointList.add(Point.fromLngLat(clickLatLng.getLongitude(), clickLatLng.getLatitude())); | ||
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| int pointListSize = pointList.size(); | ||
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| double distanceBetweenLastAndSecondToLastClickPoint = 0; | ||
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| // Make the Turf calculation between the last tap point and the second-to-last tap point. | ||
| if (pointList.size() >= 2) { | ||
| distanceBetweenLastAndSecondToLastClickPoint = TurfMeasurement.distance( | ||
| pointList.get(pointListSize - 2), pointList.get(pointListSize - 1)); | ||
| } | ||
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| // Re-draw the new GeoJSON data | ||
| if (pointListSize >= 2 && distanceBetweenLastAndSecondToLastClickPoint > 0) { | ||
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| // Add the last TurfMeasurement#distance calculated distance to the total line distance. | ||
| totalLineDistance += distanceBetweenLastAndSecondToLastClickPoint; | ||
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| // Adjust the TextView to display the new total line distance. | ||
| // DISTANCE_UNITS must be equal to a String found in the TurfConstants class | ||
| lineLengthTextView.setText(String.format(getString(R.string.line_distance_textview), DISTANCE_UNITS, | ||
| String.valueOf(totalLineDistance))); | ||
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| // Set the specific source's GeoJSON data | ||
| geoJsonSource.setGeoJson(Feature.fromGeometry(LineString.fromLngLats(pointList))); | ||
| } | ||
| } | ||
| } | ||
| }); | ||
| } | ||
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| // Add the mapView lifecycle to the activity's lifecycle methods | ||
| @Override | ||
| public void onResume() { | ||
| super.onResume(); | ||
| mapView.onResume(); | ||
| } | ||
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| @Override | ||
| protected void onStart() { | ||
| super.onStart(); | ||
| mapView.onStart(); | ||
| } | ||
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| @Override | ||
| protected void onStop() { | ||
| super.onStop(); | ||
| mapView.onStop(); | ||
| } | ||
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| @Override | ||
| public void onPause() { | ||
| super.onPause(); | ||
| mapView.onPause(); | ||
| } | ||
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| @Override | ||
| public void onLowMemory() { | ||
| super.onLowMemory(); | ||
| mapView.onLowMemory(); | ||
| } | ||
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| @Override | ||
| protected void onDestroy() { | ||
| super.onDestroy(); | ||
| if (mapboxMap != null) { | ||
| mapboxMap.removeOnMapClickListener(this); | ||
| } | ||
| mapView.onDestroy(); | ||
| } | ||
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| @Override | ||
| protected void onSaveInstanceState(Bundle outState) { | ||
| super.onSaveInstanceState(outState); | ||
| mapView.onSaveInstanceState(outState); | ||
| } | ||
| } |
34 changes: 34 additions & 0 deletions
34
MapboxAndroidDemo/src/main/res/layout/activity_javaservices_turf_measure_line.xml
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| <?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:tools="http://schemas.android.com/tools" | ||
| android:id="@+id/constraint_layout" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="match_parent" | ||
| tools:context=".examples.javaservices.TurfLineDistanceActivity"> | ||
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| <com.mapbox.mapboxsdk.maps.MapView | ||
| android:id="@+id/mapView" | ||
| android:layout_width="match_parent" | ||
| android:layout_height="match_parent" | ||
| mapbox:mapbox_cameraTargetLat="21.3011229" | ||
| mapbox:mapbox_cameraTargetLng="-157.851376" | ||
| mapbox:mapbox_cameraZoom="12" /> | ||
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| <androidx.cardview.widget.CardView | ||
| android:id="@+id/cardView7" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| android:layout_gravity="top|center" | ||
| android:layout_marginTop="8dp"> | ||
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| <TextView | ||
| android:id="@+id/line_length_textView" | ||
| android:layout_width="wrap_content" | ||
| android:layout_height="wrap_content" | ||
| android:padding="8dp" | ||
| android:text="@string/line_distance_textview" /> | ||
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| </androidx.cardview.widget.CardView> | ||
|
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| </FrameLayout> |
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