1 files changed, 216 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..0eaccfef0c
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/SymbolGeneratorActivity.java
@@ -0,0 +1,216 @@
+package com.mapbox.mapboxsdk.testapp.activity.style;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.support.v7.app.AppCompatActivity;
+import android.graphics.Color;
+import android.graphics.PointF;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+
+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.geometry.LatLng;
+import com.mapbox.mapboxsdk.maps.MapView;
+import com.mapbox.mapboxsdk.maps.MapboxMap;
+import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
+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.List;
+
+import timber.log.Timber;
+
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
+import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
+
+/**
+ * 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_VALUE = "name_sort";
+
+  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(MapboxMap map) {
+    mapboxMap = map;
+    try {
+      // read local geojson from raw folder
+      String tinyCountriesJson = ResourceUtils.readRawResource(this, 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);
+
+      // add a geojson to the map
+      Source source = new GeoJsonSource(SOURCE_ID, featureCollection);
+      mapboxMap.addSource(source);
+
+      // for each feature add a symbolLayer
+      for (Feature feature : featureCollection.getFeatures()) {
+        String countryName = feature.getStringProperty(FEATURE_ID);
+
+        // create View
+        TextView textView = new TextView(this);
+        textView.setBackgroundColor(getResources().getColor(R.color.blueAccent));
+        textView.setPadding(10, 5, 10, 5);
+        textView.setTextColor(Color.WHITE);
+        textView.setText(countryName);
+
+        // create bitmap from view
+        mapboxMap.addImage(countryName, SymbolGenerator.generate(textView));
+      }
+
+      // create layer use
+      mapboxMap.addLayer(new SymbolLayer(LAYER_ID, SOURCE_ID)
+        .withProperties(
+          iconImage("{" + FEATURE_ID + "}"), // { } is a token notation
+          iconAllowOverlap(false)
+        )
+      );
+
+      addSymbolClickListener();
+    } catch (IOException exception) {
+      Timber.e(exception);
+    }
+  }
+
+  private void addSymbolClickListener() {
+    mapboxMap.setOnMapClickListener(new MapboxMap.OnMapClickListener() {
+      @Override
+      public void onMapClick(@NonNull LatLng 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_VALUE),
+            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 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;
+    }
+  }
+}