Examples

Click to add photo

package com.mapbox.mapboxandroiddemo.examples.styles;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
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.geometry.LatLngQuad;
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.RasterLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.style.sources.ImageSource;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import timber.log.Timber;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleColor;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.circleRadius;
/**
* Tap the map in four locations to set the bounds for an image that is selected from the device's gallery
* and then added to the map.
*/
public class ClickToAddImageActivity extends AppCompatActivity implements
OnMapReadyCallback, MapboxMap.OnMapClickListener {
private static final String ID_IMAGE_SOURCE = "source-id";
private static final String CIRCLE_SOURCE_ID = "circle-source-id";
private static final String ID_IMAGE_LAYER = "layer-id";
private static int PHOTO_PICK_CODE = 4;
private MapView mapView;
private MapboxMap mapboxMap;
private LatLngQuad quad;
private List<Feature> boundsFeatureList;
private List<Point> boundsCirclePointList;
private int imageCountIndex;
@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_click_to_add_image);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.MAPBOX_STREETS, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
boundsFeatureList = new ArrayList<>();
boundsCirclePointList = new ArrayList<>();
ClickToAddImageActivity.this.mapboxMap = mapboxMap;
mapboxMap.addOnMapClickListener(ClickToAddImageActivity.this);
imageCountIndex = 0;
initCircleSource(style);
initCircleLayer(style);
Toast.makeText(ClickToAddImageActivity.this, R.string.tap_instructions, Toast.LENGTH_LONG).show();
}
});
}
@Override
public boolean onMapClick(@NonNull LatLng point) {
// Reset the lists once enough LatLngQuad points have been tapped
if (boundsFeatureList.size() == 4) {
boundsFeatureList = new ArrayList<>();
boundsCirclePointList = new ArrayList<>();
}
boundsFeatureList.add(Feature.fromGeometry(Point.fromLngLat(point.getLongitude(), point.getLatitude())));
// Add the click point to the CircleLayer and update the display of the CircleLayer data
boundsCirclePointList.add(Point.fromLngLat(point.getLongitude(), point.getLatitude()));
Style style = mapboxMap.getStyle();
if (style != null) {
GeoJsonSource circleSource = style.getSourceAs(CIRCLE_SOURCE_ID);
if (circleSource != null) {
circleSource.setGeoJson(FeatureCollection.fromFeatures(boundsFeatureList));
}
}
// Once the 4 LatLngQuad points have been set for where the image will placed...
if (boundsCirclePointList.size() == 4) {
// Create the LatLng objects to use in the LatLngQuad
LatLng latLng1 = new LatLng(boundsCirclePointList.get(0).latitude(),
boundsCirclePointList.get(0).longitude());
LatLng latLng2 = new LatLng(boundsCirclePointList.get(1).latitude(),
boundsCirclePointList.get(1).longitude());
LatLng latLng3 = new LatLng(boundsCirclePointList.get(2).latitude(),
boundsCirclePointList.get(2).longitude());
LatLng latLng4 = new LatLng(boundsCirclePointList.get(3).latitude(),
boundsCirclePointList.get(3).longitude());
quad = new LatLngQuad(latLng1, latLng2, latLng3, latLng4);
// Launch the intent to open the device's image gallery picker
Intent pickPhotoIntent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
pickPhotoIntent.setType("image/*");
startActivityForResult(pickPhotoIntent, PHOTO_PICK_CODE);
}
return true;
}
/**
* Set up the CircleLayer source for showing LatLngQuad map click points
*/
private void initCircleSource(@NonNull Style loadedMapStyle) {
loadedMapStyle.addSource(
new GeoJsonSource(CIRCLE_SOURCE_ID, FeatureCollection.fromFeatures(new Feature[] {}))
);
}
/**
* Set up the CircleLayer for showing LatLngQuad map click points
*/
private void initCircleLayer(@NonNull Style loadedMapStyle) {
loadedMapStyle.addLayer(new CircleLayer("circle-layer-bounds-corner-id",
CIRCLE_SOURCE_ID).withProperties(
circleRadius(8f),
circleColor(Color.parseColor("#d004d3"))
));
}
/**
* Calling onActivityResult() to handle the return to the example from the device's image galleyr picker
*/
@Override
public void onActivityResult(int requestCode, int resultCode, final Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PHOTO_PICK_CODE && resultCode == Activity.RESULT_OK) {
if (data == null) {
//Display an error
Timber.d("data == null");
return;
}
if (mapboxMap != null) {
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
Uri selectedImage = data.getData();
InputStream imageStream;
try {
imageStream = getContentResolver().openInputStream(selectedImage);
Bitmap bitmapOfSelectedImage = BitmapFactory.decodeStream(imageStream);
// Add the imageSource to the map
style.addSource(
new ImageSource(ID_IMAGE_SOURCE + imageCountIndex, quad, bitmapOfSelectedImage));
// Create a raster layer and use the imageSource's ID as the layer's data// Add the layer to the map
style.addLayer(new RasterLayer(ID_IMAGE_LAYER + imageCountIndex,
ID_IMAGE_SOURCE + imageCountIndex));
// Reset lists in preparation for adding more images
boundsFeatureList = new ArrayList<>();
boundsCirclePointList = new ArrayList<>();
imageCountIndex++;
// Clear circles from CircleLayer
GeoJsonSource circleSource = style.getSourceAs(CIRCLE_SOURCE_ID);
if (circleSource != null) {
circleSource.setGeoJson(FeatureCollection.fromFeatures(boundsFeatureList));
}
} catch (FileNotFoundException exception) {
exception.printStackTrace();
}
}
});
}
}
}
// 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);
}
}