diff options
Diffstat (limited to 'platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java')
| -rw-r--r-- | platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java new file mode 100644 index 0000000000..1ef59db9b1 --- /dev/null +++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java @@ -0,0 +1,309 @@ +package com.mapbox.mapboxsdk.testapp.activity.style; + +import android.content.Context; +import android.graphics.Bitmap; +import android.graphics.Canvas; +import android.graphics.Color; +import android.graphics.PointF; +import android.os.AsyncTask; +import android.os.Bundle; +import android.support.annotation.NonNull; +import android.support.v7.app.AppCompatActivity; +import android.view.Menu; +import android.view.MenuItem; +import android.view.View; +import android.widget.TextView; +import android.widget.Toast; + +import com.google.gson.GsonBuilder; +import com.mapbox.mapboxsdk.maps.MapView; +import com.mapbox.mapboxsdk.maps.MapboxMap; +import com.mapbox.mapboxsdk.maps.OnMapReadyCallback; +import com.mapbox.mapboxsdk.style.layers.Filter; +import com.mapbox.mapboxsdk.style.layers.SymbolLayer; +import com.mapbox.mapboxsdk.style.sources.GeoJsonSource; +import com.mapbox.mapboxsdk.style.sources.Source; +import com.mapbox.mapboxsdk.testapp.R; +import com.mapbox.mapboxsdk.testapp.utils.ResourceUtils; +import com.mapbox.services.commons.geojson.Feature; +import com.mapbox.services.commons.geojson.FeatureCollection; +import com.mapbox.services.commons.geojson.Geometry; +import com.mapbox.services.commons.geojson.custom.GeometryDeserializer; +import com.mapbox.services.commons.geojson.custom.PositionDeserializer; +import com.mapbox.services.commons.models.Position; + +import java.io.IOException; +import java.util.HashMap; +import java.util.List; + +import timber.log.Timber; + +import static com.mapbox.mapboxsdk.style.expressions.Expression.concat; +import static com.mapbox.mapboxsdk.style.expressions.Expression.division; +import static com.mapbox.mapboxsdk.style.expressions.Expression.downcase; +import static com.mapbox.mapboxsdk.style.expressions.Expression.get; +import static com.mapbox.mapboxsdk.style.expressions.Expression.literal; +import static com.mapbox.mapboxsdk.style.expressions.Expression.pi; +import static com.mapbox.mapboxsdk.style.expressions.Expression.product; +import static com.mapbox.mapboxsdk.style.expressions.Expression.upcase; +import static com.mapbox.mapboxsdk.style.layers.Property.ICON_ANCHOR_BOTTOM; +import static com.mapbox.mapboxsdk.style.layers.Property.TEXT_ANCHOR_TOP; +import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap; +import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAnchor; +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.iconSize; +import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAnchor; +import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField; +import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textSize; + +/** + * Test activity showcasing using a symbol generator that generates Bitmaps from Android SDK Views. + */ +public class SymbolGeneratorActivity extends AppCompatActivity implements OnMapReadyCallback { + + private static final String SOURCE_ID = "com.mapbox.mapboxsdk.style.layers.symbol.source.id"; + private static final String LAYER_ID = "com.mapbox.mapboxsdk.style.layers.symbol.layer.id"; + private static final String FEATURE_ID = "brk_name"; + private static final String FEATURE_RANK = "scalerank"; + private static final String FEATURE_NAME = "name_sort"; + private static final String FEATURE_TYPE = "type"; + private static final String FEATURE_REGION = "continent"; + + private MapView mapView; + private MapboxMap mapboxMap; + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setContentView(R.layout.activity_symbol_generator); + + mapView = (MapView) findViewById(R.id.mapView); + mapView.onCreate(savedInstanceState); + mapView.getMapAsync(this); + } + + @Override + public void onMapReady(final MapboxMap map) { + mapboxMap = map; + addSymbolClickListener(); + new LoadDataTask(this).execute(); + } + + private void addSymbolClickListener() { + mapboxMap.setOnMapClickListener(point -> { + PointF screenPoint = mapboxMap.getProjection().toScreenLocation(point); + List<Feature> features = mapboxMap.queryRenderedFeatures(screenPoint, LAYER_ID); + if (!features.isEmpty()) { + Feature feature = features.get(0); + Timber.v("Feature was clicked with data: %s", feature.toJson()); + Toast.makeText( + SymbolGeneratorActivity.this, + "hello from: " + feature.getStringProperty(FEATURE_NAME), + Toast.LENGTH_LONG).show(); + } + }); + } + + @Override + public boolean onCreateOptionsMenu(Menu menu) { + getMenuInflater().inflate(R.menu.menu_generator_symbol, menu); + return super.onCreateOptionsMenu(menu); + } + + @Override + public boolean onOptionsItemSelected(MenuItem item) { + if (item.getItemId() == R.id.menu_action_icon_overlap) { + SymbolLayer layer = mapboxMap.getLayerAs(LAYER_ID); + layer.setProperties(iconAllowOverlap(!layer.getIconAllowOverlap().getValue())); + return true; + } else if (item.getItemId() == R.id.menu_action_filter) { + SymbolLayer layer = mapboxMap.getLayerAs(LAYER_ID); + layer.setFilter(Filter.eq(FEATURE_RANK, 1)); + //layer.setFilter(eq(get(FEATURE_RANK), 1)); + return true; + } + return super.onOptionsItemSelected(item); + } + + @Override + protected void onStart() { + super.onStart(); + mapView.onStart(); + } + + @Override + protected void onResume() { + super.onResume(); + mapView.onResume(); + } + + @Override + protected void onPause() { + super.onPause(); + mapView.onPause(); + } + + @Override + protected void onStop() { + super.onStop(); + mapView.onStop(); + } + + @Override + public void onSaveInstanceState(Bundle outState) { + super.onSaveInstanceState(outState); + mapView.onSaveInstanceState(outState); + } + + @Override + public void onLowMemory() { + super.onLowMemory(); + mapView.onLowMemory(); + } + + @Override + public void onDestroy() { + super.onDestroy(); + mapView.onDestroy(); + } + + /** + * Utility class to generate Bitmaps for Symbol. + * <p> + * Bitmaps can be added to the map with {@link com.mapbox.mapboxsdk.maps.MapboxMap#addImage(String, Bitmap)} + * </p> + */ + private static class SymbolGenerator { + + /** + * Generate a Bitmap from an Android SDK View. + * + * @param view the View to be drawn to a Bitmap + * @return the generated bitmap + */ + public static Bitmap generate(@NonNull View view) { + int measureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED); + view.measure(measureSpec, measureSpec); + + int measuredWidth = view.getMeasuredWidth(); + int measuredHeight = view.getMeasuredHeight(); + + view.layout(0, 0, measuredWidth, measuredHeight); + Bitmap bitmap = Bitmap.createBitmap(measuredWidth, measuredHeight, Bitmap.Config.ARGB_8888); + bitmap.eraseColor(Color.TRANSPARENT); + Canvas canvas = new Canvas(bitmap); + view.draw(canvas); + return bitmap; + } + } + + private static class LoadDataTask extends AsyncTask<Void, Void, FeatureCollection> { + + private SymbolGeneratorActivity activity; + + LoadDataTask(SymbolGeneratorActivity activity) { + this.activity = activity; + } + + @Override + protected FeatureCollection doInBackground(Void... params) { + try { + // read local geojson from raw folder + String tinyCountriesJson = ResourceUtils.readRawResource(activity, R.raw.tiny_countries); + + // convert geojson to a model + FeatureCollection featureCollection = new GsonBuilder() + .registerTypeAdapter(Geometry.class, new GeometryDeserializer()) + .registerTypeAdapter(Position.class, new PositionDeserializer()) + .create().fromJson(tinyCountriesJson, FeatureCollection.class); + + return featureCollection; + } catch (IOException exception) { + return null; + } + } + + @Override + protected void onPostExecute(FeatureCollection featureCollection) { + super.onPostExecute(featureCollection); + if (featureCollection == null || activity == null) { + return; + } + + activity.onDataLoaded(featureCollection); + } + } + + public void onDataLoaded(@NonNull FeatureCollection featureCollection) { + // add a geojson to the map + Source source = new GeoJsonSource(SOURCE_ID, featureCollection); + mapboxMap.addSource(source); + + // create layer use + mapboxMap.addLayer(new SymbolLayer(LAYER_ID, SOURCE_ID) + .withProperties( + + // icon configuration + iconImage(get(literal(FEATURE_ID))), + iconAllowOverlap(false), + iconSize( + division(get(literal(FEATURE_RANK)), literal(2)) + ), + iconAnchor(ICON_ANCHOR_BOTTOM), + iconOffset(new Float[] {0.0f, -5.0f}), + + // text field configuration + textField( + concat( + upcase(literal("a ")), + get(literal(FEATURE_TYPE)), + downcase(literal(" IN ")), + get(literal(FEATURE_REGION)) + ) + ), + textSize( + product(get(literal(FEATURE_RANK)), pi()) + ), + textAnchor(TEXT_ANCHOR_TOP) + ) + ); + + new GenerateSymbolTask(mapboxMap, this).execute(featureCollection); + } + + private static class GenerateSymbolTask extends AsyncTask<FeatureCollection, Void, HashMap<String, Bitmap>> { + + private MapboxMap mapboxMap; + private Context context; + + GenerateSymbolTask(MapboxMap mapboxMap, Context context) { + this.mapboxMap = mapboxMap; + this.context = context; + } + + @SuppressWarnings("WrongThread") + @Override + protected HashMap<String, Bitmap> doInBackground(FeatureCollection... params) { + FeatureCollection featureCollection = params[0]; + + HashMap<String, Bitmap> imagesMap = new HashMap<>(); + for (Feature feature : featureCollection.getFeatures()) { + String countryName = feature.getStringProperty(FEATURE_ID); + TextView textView = new TextView(context); + textView.setBackgroundColor(context.getResources().getColor(R.color.blueAccent)); + textView.setPadding(10, 5, 10, 5); + textView.setTextColor(Color.WHITE); + textView.setText(countryName); + imagesMap.put(countryName, SymbolGenerator.generate(textView)); + } + return imagesMap; + } + + @Override + protected void onPostExecute(HashMap<String, Bitmap> bitmapHashMap) { + super.onPostExecute(bitmapHashMap); + mapboxMap.addImages(bitmapHashMap); + } + } +}
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