Adds checkstyle to CI (#7442)

* adds checkstyle to CI

* fixed gradlew path

* resolved testapp checkstyle violations

* added back mapboxMap variable for test

* checkstyle annotations

* checkstyle SDK round 1

* maps package checkstyle

* rest of SDK checkstyle

* checkstyle gesture library

* checkstyle test

* finished rest of test checkstyle

* resolved all checkstyle errors

* fixed class name

* removed old test file

* fixed camera postion test

* fixed native crash

1 files changed, 463 insertions, 459 deletions

diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RuntimeStyleActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RuntimeStyleActivity.java
index 8143efb03d..2ac3a6fb00 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RuntimeStyleActivity.java
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/style/RuntimeStyleActivity.java
@@ -7,7 +7,6 @@ import android.support.annotation.RawRes;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
-import timber.log.Timber;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.Toast;
@@ -44,7 +43,8 @@ import java.io.Writer;
 import java.util.ArrayList;
 import java.util.List;
 
-import static android.os.Looper.getMainLooper;
+import timber.log.Timber;
+
 import static com.mapbox.mapboxsdk.style.layers.Filter.all;
 import static com.mapbox.mapboxsdk.style.layers.Filter.eq;
 import static com.mapbox.mapboxsdk.style.layers.Filter.gte;
@@ -75,508 +75,512 @@ import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.visibility;
  */
 public class RuntimeStyleActivity extends AppCompatActivity {
 
-    private MapView mapView;
-    private MapboxMap mapboxMap;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_runtime_style);
-
-        setupActionBar();
-
-        //Initialize map as normal
-        mapView = (MapView) findViewById(R.id.mapView);
-        mapView.onCreate(savedInstanceState);
-
-
-        mapView.getMapAsync(new OnMapReadyCallback() {
-            @Override
-            public void onMapReady(MapboxMap map) {
-                //Store for later
-                mapboxMap = map;
-
-                //Center and Zoom (Amsterdam, zoomed to streets)
-                mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(52.379189, 4.899431), 14));
-            }
-        });
-    }
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        getMenuInflater().inflate(R.menu.menu_runtime_style, menu);
+  private MapView mapView;
+  private MapboxMap mapboxMap;
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_runtime_style);
+
+    setupActionBar();
+
+    //Initialize map as normal
+    mapView = (MapView) findViewById(R.id.mapView);
+    mapView.onCreate(savedInstanceState);
+
+
+    mapView.getMapAsync(new OnMapReadyCallback() {
+      @Override
+      public void onMapReady(MapboxMap map) {
+        //Store for later
+        mapboxMap = map;
+
+        //Center and Zoom (Amsterdam, zoomed to streets)
+        mapboxMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(52.379189, 4.899431), 14));
+      }
+    });
+  }
+
+  @Override
+  public boolean onCreateOptionsMenu(Menu menu) {
+    getMenuInflater().inflate(R.menu.menu_runtime_style, menu);
+    return true;
+  }
+
+  @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
+  protected void onSaveInstanceState(Bundle outState) {
+    super.onSaveInstanceState(outState);
+    mapView.onSaveInstanceState(outState);
+  }
+
+  @Override
+  protected void onDestroy() {
+    super.onDestroy();
+    mapView.onDestroy();
+  }
+
+  @Override
+  public void onLowMemory() {
+    super.onLowMemory();
+    mapView.onLowMemory();
+  }
+
+  @Override
+  public boolean onOptionsItemSelected(MenuItem item) {
+    switch (item.getItemId()) {
+      case android.R.id.home:
+        onBackPressed();
+        return true;
+      case R.id.action_water_color:
+        setWaterColor();
+        return true;
+      case R.id.action_background_opacity:
+        setBackgroundOpacity();
+        return true;
+      case R.id.action_road_avoid_edges:
+        setRoadSymbolPlacement();
+        return true;
+      case R.id.action_layer_visibility:
+        setLayerInvisible();
+        return true;
+      case R.id.action_remove_layer:
+        removeBuildings();
+        return true;
+      case R.id.action_add_parks_layer:
+        addParksLayer();
+        return true;
+      case R.id.action_add_dynamic_parks_layer:
+        addDynamicParksLayer();
+        return true;
+      case R.id.action_add_terrain_layer:
+        addTerrainLayer();
+        return true;
+      case R.id.action_add_satellite_layer:
+        addSatelliteLayer();
+        return true;
+      case R.id.action_update_water_color_on_zoom:
+        updateWaterColorOnZoom();
         return true;
+      case R.id.action_add_custom_tiles:
+        addCustomTileSource();
+        return true;
+      case R.id.action_fill_filter:
+        styleFillFilterLayer();
+        return true;
+      case R.id.action_line_filter:
+        styleLineFilterLayer();
+        return true;
+      case R.id.action_numeric_filter:
+        styleNumericFillLayer();
+        return true;
+      default:
+        return super.onOptionsItemSelected(item);
     }
-
-    @Override
-    protected void onStart() {
-        super.onStart();
-        mapView.onStart();
+  }
+
+  private void setLayerInvisible() {
+    String[] roadLayers = new String[] {"water"};
+    for (String roadLayer : roadLayers) {
+      Layer layer = mapboxMap.getLayer(roadLayer);
+      if (layer != null) {
+        layer.setProperties(visibility(NONE));
+      }
     }
-
-    @Override
-    protected void onResume() {
-        super.onResume();
-        mapView.onResume();
+  }
+
+  private void setRoadSymbolPlacement() {
+    //Zoom so that the labels are visible first
+    mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(14), new DefaultCallback() {
+      @Override
+      public void onFinish() {
+        String[] roadLayers = new String[] {"road-label-small", "road-label-medium", "road-label-large"};
+        for (String roadLayer : roadLayers) {
+          Layer layer = mapboxMap.getLayer(roadLayer);
+          if (layer != null) {
+            layer.setProperties(symbolPlacement(SYMBOL_PLACEMENT_POINT));
+          }
+        }
+      }
+    });
+  }
+
+  private void setBackgroundOpacity() {
+    Layer background = mapboxMap.getLayer("background");
+    if (background != null) {
+      background.setProperties(backgroundOpacity(0.2f));
     }
-
-    @Override
-    protected void onPause() {
-        super.onPause();
-        mapView.onPause();
+  }
+
+  private void setWaterColor() {
+    Layer water = mapboxMap.getLayer("water");
+    if (water != null) {
+      water.setProperties(
+        visibility(VISIBLE),
+        fillColor(Color.RED)
+      );
+    } else {
+      Toast.makeText(RuntimeStyleActivity.this, "No water layer in this style", Toast.LENGTH_SHORT).show();
     }
-
-    @Override
-    protected void onStop() {
-        super.onStop();
-        mapView.onStop();
+  }
+
+  private void removeBuildings() {
+    //Zoom to see buildings first
+    try {
+      mapboxMap.removeLayer("building");
+    } catch (NoSuchLayerException noSuchLayerException) {
+      Toast.makeText(RuntimeStyleActivity.this, noSuchLayerException.getMessage(), Toast.LENGTH_SHORT).show();
     }
-
-    @Override
-    protected void onSaveInstanceState(Bundle outState) {
-        super.onSaveInstanceState(outState);
-        mapView.onSaveInstanceState(outState);
+  }
+
+  private void addParksLayer() {
+    //Add a source
+    Source source;
+    try {
+      source = new GeoJsonSource("amsterdam-spots", readRawResource(R.raw.amsterdam));
+    } catch (IOException ioException) {
+      Toast.makeText(
+        RuntimeStyleActivity.this,
+        "Couldn't add source: " + ioException.getMessage(),
+        Toast.LENGTH_SHORT).show();
+      return;
     }
 
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        mapView.onDestroy();
+    mapboxMap.addSource(source);
+
+    FillLayer layer = new FillLayer("parksLayer", "amsterdam-spots");
+    layer.setProperties(
+      fillColor(Color.RED),
+      fillOutlineColor(Color.BLUE),
+      fillOpacity(0.3f),
+      fillAntialias(true)
+    );
+
+    //Only show me parks (except westerpark with stroke-width == 3)
+    layer.setFilter(all(eq("type", "park"), eq("stroke-width", 2)));
+
+    mapboxMap.addLayer(layer, "building");
+    //layer.setPaintProperty(fillColor(Color.RED)); //XXX But not after the object is attached
+
+    //Or get the object later and set it. It's all good.
+    mapboxMap.getLayer("parksLayer").setProperties(fillColor(Color.RED));
+
+    //You can get a typed layer, if you're sure it's of that type. Use with care
+    layer = mapboxMap.getLayerAs("parksLayer");
+    //And get some properties
+    PropertyValue<Boolean> fillAntialias = layer.getFillAntialias();
+    Timber.d("Fill anti alias: " + fillAntialias.getValue());
+    layer.setProperties(fillTranslateAnchor(FILL_TRANSLATE_ANCHOR_MAP));
+    PropertyValue<String> fillTranslateAnchor = layer.getFillTranslateAnchor();
+    Timber.d("Fill translate anchor: " + fillTranslateAnchor.getValue());
+    PropertyValue<String> visibility = layer.getVisibility();
+    Timber.d("Visibility: " + visibility.getValue());
+
+    //Get a good look at it all
+    mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(12));
+  }
+
+  private void addDynamicParksLayer() {
+    //Load some data
+    FeatureCollection parks;
+    try {
+      String json = readRawResource(R.raw.amsterdam);
+      parks = FeatureCollection.fromJson(json);
+    } catch (IOException ioException) {
+      Toast.makeText(
+        RuntimeStyleActivity.this,
+        "Couldn't add source: " + ioException.getMessage(),
+        Toast.LENGTH_SHORT
+      ).show();
+      return;
     }
 
-    @Override
-    public void onLowMemory() {
-        super.onLowMemory();
-        mapView.onLowMemory();
-    }
+    //Add an empty source
+    mapboxMap.addSource(new GeoJsonSource("dynamic-park-source"));
 
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        switch (item.getItemId()) {
-            case android.R.id.home:
-                onBackPressed();
-                return true;
-            case R.id.action_water_color:
-                setWaterColor();
-                return true;
-            case R.id.action_background_opacity:
-                setBackgroundOpacity();
-                return true;
-            case R.id.action_road_avoid_edges:
-                setRoadSymbolPlacement();
-                return true;
-            case R.id.action_layer_visibility:
-                setLayerInvisible();
-                return true;
-            case R.id.action_remove_layer:
-                removeBuildings();
-                return true;
-            case R.id.action_add_parks_layer:
-                addParksLayer();
-                return true;
-            case R.id.action_add_dynamic_parks_layer:
-                addDynamicParksLayer();
-                return true;
-            case R.id.action_add_terrain_layer:
-                addTerrainLayer();
-                return true;
-            case R.id.action_add_satellite_layer:
-                addSatelliteLayer();
-                return true;
-            case R.id.action_update_water_color_on_zoom:
-                updateWaterColorOnZoom();
-                return true;
-            case R.id.action_add_custom_tiles:
-                addCustomTileSource();
-                return true;
-            case R.id.action_fill_filter:
-                styleFillFilterLayer();
-                return true;
-            case R.id.action_line_filter:
-                styleLineFilterLayer();
-                return true;
-            case R.id.action_numeric_filter:
-                styleNumericFillLayer();
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
-        }
-    }
+    FillLayer layer = new FillLayer("dynamic-parks-layer", "dynamic-park-source");
+    layer.setProperties(
+      fillColor(Color.GREEN),
+      fillOutlineColor(Color.GREEN),
+      fillOpacity(0.8f),
+      fillAntialias(true)
+    );
 
-    private void setLayerInvisible() {
-        String[] roadLayers = new String[]{"water"};
-        for (String roadLayer : roadLayers) {
-            Layer layer = mapboxMap.getLayer(roadLayer);
-            if (layer != null) {
-                layer.setProperties(visibility(NONE));
-            }
-        }
-    }
+    //Only show me parks
+    layer.setFilter(all(eq("type", "park")));
 
-    private void setRoadSymbolPlacement() {
-        //Zoom so that the labels are visible first
-        mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(14), new DefaultCallback() {
-            @Override
-            public void onFinish() {
-                String[] roadLayers = new String[]{"road-label-small", "road-label-medium", "road-label-large"};
-                for (String roadLayer : roadLayers) {
-                    Layer layer = mapboxMap.getLayer(roadLayer);
-                    if (layer != null) {
-                        layer.setProperties(symbolPlacement(SYMBOL_PLACEMENT_POINT));
-                    }
-                }
-            }
-        });
-    }
+    mapboxMap.addLayer(layer);
 
-    private void setBackgroundOpacity() {
-        Layer background = mapboxMap.getLayer("background");
-        if (background != null) {
-            background.setProperties(backgroundOpacity(0.2f));
-        }
-    }
+    //Get a good look at it all
+    mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(12));
 
-    private void setWaterColor() {
-        Layer water = mapboxMap.getLayer("water");
-        if (water != null) {
-            water.setProperties(
-                    visibility(VISIBLE),
-                    fillColor(Color.RED)
-            );
-        } else {
-            Toast.makeText(RuntimeStyleActivity.this, "No water layer in this style", Toast.LENGTH_SHORT).show();
-        }
-    }
+    //Animate the parks source
+    animateParksSource(parks, 0);
+  }
 
-    private void removeBuildings() {
-        //Zoom to see buildings first
-        try {
-            mapboxMap.removeLayer("building");
-        } catch (NoSuchLayerException noSuchLayerException) {
-            Toast.makeText(RuntimeStyleActivity.this, noSuchLayerException.getMessage(), Toast.LENGTH_SHORT).show();
+  private void animateParksSource(final FeatureCollection parks, final int counter) {
+    Handler handler = new Handler(getMainLooper());
+    handler.postDelayed(new Runnable() {
+      @Override
+      public void run() {
+        if (mapboxMap == null) {
+          return;
         }
-    }
 
-    private void addParksLayer() {
-        //Add a source
-        Source source;
-        try {
-            source = new GeoJsonSource("amsterdam-spots", readRawResource(R.raw.amsterdam));
-        } catch (IOException ioException) {
-            Toast.makeText(
-                RuntimeStyleActivity.this,
-                "Couldn't add source: " + ioException.getMessage(),
-                Toast.LENGTH_SHORT).show();
-            return;
-        }
+        Timber.d("Updating parks source");
+        //change the source
+        int park = counter < parks.getFeatures().size() - 1 ? counter : 0;
 
-        mapboxMap.addSource(source);
-
-        FillLayer layer = new FillLayer("parksLayer", "amsterdam-spots");
-        layer.setProperties(
-                fillColor(Color.RED),
-                fillOutlineColor(Color.BLUE),
-                fillOpacity(0.3f),
-                fillAntialias(true)
-        );
-
-        //Only show me parks (except westerpark with stroke-width == 3)
-        layer.setFilter(all(eq("type", "park"), eq("stroke-width", 2)));
-
-        mapboxMap.addLayer(layer, "building");
-        //layer.setPaintProperty(fillColor(Color.RED)); //XXX But not after the object is attached
-
-        //Or get the object later and set it. It's all good.
-        mapboxMap.getLayer("parksLayer").setProperties(fillColor(Color.RED));
-
-        //You can get a typed layer, if you're sure it's of that type. Use with care
-        layer = mapboxMap.getLayerAs("parksLayer");
-        //And get some properties
-        PropertyValue<Boolean> fillAntialias = layer.getFillAntialias();
-        Timber.d("Fill anti alias: " + fillAntialias.getValue());
-        layer.setProperties(fillTranslateAnchor(FILL_TRANSLATE_ANCHOR_MAP));
-        PropertyValue<String> fillTranslateAnchor = layer.getFillTranslateAnchor();
-        Timber.d("Fill translate anchor: " + fillTranslateAnchor.getValue());
-        PropertyValue<String> visibility = layer.getVisibility();
-        Timber.d("Visibility: " + visibility.getValue());
-
-        //Get a good look at it all
-        mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(12));
-    }
+        GeoJsonSource source = mapboxMap.getSourceAs("dynamic-park-source");
 
-    private void addDynamicParksLayer() {
-        //Load some data
-        FeatureCollection parks;
-        try {
-            String json = readRawResource(R.raw.amsterdam);
-            parks = FeatureCollection.fromJson(json);
-        } catch (IOException e) {
-            Toast.makeText(RuntimeStyleActivity.this, "Couldn't add source: " + e.getMessage(), Toast.LENGTH_SHORT).show();
-            return;
+        if (source == null) {
+          Timber.e("Source not found");
+          Toast.makeText(RuntimeStyleActivity.this, "Source not found", Toast.LENGTH_SHORT).show();
+          return;
         }
 
-        //Add an empty source
-        mapboxMap.addSource(new GeoJsonSource("dynamic-park-source"));
-
-        FillLayer layer = new FillLayer("dynamic-parks-layer", "dynamic-park-source");
-        layer.setProperties(
-                fillColor(Color.GREEN),
-                fillOutlineColor(Color.GREEN),
-                fillOpacity(0.8f),
-                fillAntialias(true)
-        );
-
-        //Only show me parks
-        layer.setFilter(all(eq("type", "park")));
-
-        mapboxMap.addLayer(layer);
-
-        //Get a good look at it all
-        mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(12));
-
-        //Animate the parks source
-        animateParksSource(parks, 0);
+        List<Feature> features = new ArrayList<>();
+        features.add(parks.getFeatures().get(park));
+        source.setGeoJson(FeatureCollection.fromFeatures(features));
+
+        //Re-post
+        animateParksSource(parks, park + 1);
+      }
+    }, counter == 0 ? 100 : 1000);
+  }
+
+  private void addTerrainLayer() {
+    //Add a source
+    Source source = new VectorSource("my-terrain-source", "mapbox://mapbox.mapbox-terrain-v2");
+    mapboxMap.addSource(source);
+
+    LineLayer layer = new LineLayer("terrainLayer", "my-terrain-source");
+    layer.setSourceLayer("contour");
+    layer.setProperties(
+      lineJoin(Property.LINE_JOIN_ROUND),
+      lineCap(Property.LINE_CAP_ROUND),
+      lineColor(Color.RED),
+      lineWidth(20f)
+    );
+
+    mapboxMap.addLayer(layer);
+
+    //Need to get a fresh handle
+    layer = mapboxMap.getLayerAs("terrainLayer");
+
+    //Make sure it's also applied after the fact
+    layer.setMinZoom(10);
+    layer.setMaxZoom(15);
+
+    layer = (LineLayer) mapboxMap.getLayer("terrainLayer");
+    Toast.makeText(this, String.format(
+      "Set min/max zoom to %s - %s", layer.getMinZoom(), layer.getMaxZoom()), Toast.LENGTH_SHORT).show();
+  }
+
+  private void addSatelliteLayer() {
+    //Add a source
+    Source source = new RasterSource("my-raster-source", "mapbox://mapbox.satellite", 512);
+    mapboxMap.addSource(source);
+
+    //Add a layer
+    mapboxMap.addLayer(new RasterLayer("satellite-layer", "my-raster-source"));
+  }
+
+  private void updateWaterColorOnZoom() {
+    FillLayer layer = mapboxMap.getLayerAs("water");
+    if (layer == null) {
+      return;
     }
 
-    private void animateParksSource(final FeatureCollection parks, final int counter) {
-        Handler handler = new Handler(getMainLooper());
-        handler.postDelayed(new Runnable() {
-            @Override
-            public void run() {
-                if (mapboxMap == null) {
-                    return;
-                }
-                
-                Timber.d("Updating parks source");
-                //change the source
-                int park = counter < parks.getFeatures().size() - 1 ? counter : 0;
-
-                GeoJsonSource source = mapboxMap.getSourceAs("dynamic-park-source");
-
-                if (source == null) {
-                    Timber.e("Source not found");
-                    Toast.makeText(RuntimeStyleActivity.this, "Source not found", Toast.LENGTH_SHORT).show();
-                    return;
-                }
-
-                List<Feature> features = new ArrayList<>();
-                features.add(parks.getFeatures().get(park));
-                source.setGeoJson(FeatureCollection.fromFeatures(features));
-
-                //Re-post
-                animateParksSource(parks, park + 1);
-            }
-        }, counter == 0 ? 100 : 1000);
+    //Set a zoom function to update the color of the water
+    layer.setProperties(fillColor(zoom(0.8f,
+      stop(1, fillColor(Color.GREEN)),
+      stop(4, fillColor(Color.BLUE)),
+      stop(12, fillColor(Color.RED)),
+      stop(20, fillColor(Color.BLACK))
+    )));
+
+    //do some animations to show it off properly
+    mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(1), 1500);
+
+    PropertyValue<String> fillColor = layer.getFillColor();
+    Function<String> function = fillColor.getFunction();
+    if (function != null) {
+      Timber.d("Fill color base: " + function.getBase());
+      Timber.d("Fill color #stops: " + function.getStops().length);
+      if (function.getStops() != null) {
+        for (Stop stop : function.getStops()) {
+          Timber.d("Fill color #stops: " + stop);
+        }
+      }
+    }
+  }
+
+  private String readRawResource(@RawRes int rawResource) throws IOException {
+    InputStream is = getResources().openRawResource(rawResource);
+    Writer writer = new StringWriter();
+    char[] buffer = new char[1024];
+    try {
+      Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+      int numRead;
+      while ((numRead = reader.read(buffer)) != -1) {
+        writer.write(buffer, 0, numRead);
+      }
+    } finally {
+      is.close();
     }
 
-    private void addTerrainLayer() {
-        //Add a source
-        Source source = new VectorSource("my-terrain-source", "mapbox://mapbox.mapbox-terrain-v2");
-        mapboxMap.addSource(source);
-
-        LineLayer layer = new LineLayer("terrainLayer", "my-terrain-source");
-        layer.setSourceLayer("contour");
-        layer.setProperties(
-                lineJoin(Property.LINE_JOIN_ROUND),
-                lineCap(Property.LINE_CAP_ROUND),
-                lineColor(Color.RED),
-                lineWidth(20f)
-        );
-
-        mapboxMap.addLayer(layer);
-
-        //Need to get a fresh handle
-        layer = mapboxMap.getLayerAs("terrainLayer");
+    return writer.toString();
+  }
 
-        //Make sure it's also applied after the fact
-        layer.setMinZoom(10);
-        layer.setMaxZoom(15);
+  private void setupActionBar() {
+    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+    setSupportActionBar(toolbar);
 
-        layer = (LineLayer) mapboxMap.getLayer("terrainLayer");
-        Toast.makeText(this, String.format(
-            "Set min/max zoom to %s - %s", layer.getMinZoom(), layer.getMaxZoom()), Toast.LENGTH_SHORT).show();
+    ActionBar actionBar = getSupportActionBar();
+    if (actionBar != null) {
+      actionBar.setDisplayHomeAsUpEnabled(true);
+      actionBar.setDisplayShowHomeEnabled(true);
     }
+  }
+
+  private void addCustomTileSource() {
+    //Add a source
+    Source source = new VectorSource("custom-tile-source", new TileSet("2.1.0", "https://vector.mapzen.com/osm/all/{z}/{x}/{y}.mvt?api_key=vector-tiles-LM25tq4"));
+    mapboxMap.addSource(source);
+
+    //Add a layer
+    mapboxMap.addLayer(
+      new FillLayer("custom-tile-layers", "custom-tile-source")
+        .withSourceLayer("water")
+    );
+  }
+
+  private void styleFillFilterLayer() {
+    mapboxMap.setStyleUrl("asset://fill_filter_style.json");
+    mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(31, -100), 3));
+
+    Handler handler = new Handler(getMainLooper());
+    handler.postDelayed(new Runnable() {
+      @Override
+      public void run() {
+        if (mapboxMap == null) {
+          return;
+        }
 
-    private void addSatelliteLayer() {
-        //Add a source
-        Source source = new RasterSource("my-raster-source", "mapbox://mapbox.satellite", 512);
-        mapboxMap.addSource(source);
+        Timber.d("Styling filtered fill layer");
 
-        //Add a layer
-        mapboxMap.addLayer(new RasterLayer("satellite-layer", "my-raster-source"));
-    }
+        FillLayer states = (FillLayer) mapboxMap.getLayer("states");
 
-    private void updateWaterColorOnZoom() {
-        FillLayer layer = mapboxMap.getLayerAs("water");
-        if (layer == null) {
-            return;
-        }
+        if (states != null) {
+          states.setFilter(eq("name", "Texas"));
 
-        //Set a zoom function to update the color of the water
-        layer.setProperties(fillColor(zoom(0.8f,
-                stop(1, fillColor(Color.GREEN)),
-                stop(4, fillColor(Color.BLUE)),
-                stop(12, fillColor(Color.RED)),
-                stop(20, fillColor(Color.BLACK))
-        )));
-
-        //do some animations to show it off properly
-        mapboxMap.animateCamera(CameraUpdateFactory.zoomTo(1), 1500);
-
-        PropertyValue<String> fillColor = layer.getFillColor();
-        Function<String> function = fillColor.getFunction();
-        if (function != null) {
-            Timber.d("Fill color base: " + function.getBase());
-            Timber.d("Fill color #stops: " + function.getStops().length);
-            if (function.getStops() != null) {
-                for (Stop stop : function.getStops()) {
-                    Timber.d("Fill color #stops: " + stop);
-                }
-            }
+          states.setProperties(
+            fillColor(Color.RED),
+            fillOpacity(0.25f)
+          );
+        } else {
+          Toast.makeText(RuntimeStyleActivity.this, "No states layer in this style", Toast.LENGTH_SHORT).show();
         }
-    }
-
-    private String readRawResource(@RawRes int rawResource) throws IOException {
-        InputStream is = getResources().openRawResource(rawResource);
-        Writer writer = new StringWriter();
-        char[] buffer = new char[1024];
-        try {
-            Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
-            int n;
-            while ((n = reader.read(buffer)) != -1) {
-                writer.write(buffer, 0, n);
-            }
-        } finally {
-            is.close();
+      }
+    }, 2000);
+  }
+
+  private void styleLineFilterLayer() {
+    mapboxMap.setStyleUrl("asset://line_filter_style.json");
+    mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(40, -97), 5));
+
+    Handler handler = new Handler(getMainLooper());
+    handler.postDelayed(new Runnable() {
+      @Override
+      public void run() {
+        if (mapboxMap == null) {
+          return;
         }
 
-        return writer.toString();
-    }
+        Timber.d("Styling filtered line layer");
 
-    private void setupActionBar() {
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+        LineLayer counties = (LineLayer) mapboxMap.getLayer("counties");
 
-        ActionBar actionBar = getSupportActionBar();
-        if (actionBar != null) {
-            actionBar.setDisplayHomeAsUpEnabled(true);
-            actionBar.setDisplayShowHomeEnabled(true);
-        }
-    }
+        if (counties != null) {
+          counties.setFilter(eq("NAME10", "Washington"));
 
-    private void addCustomTileSource() {
-        //Add a source
-        Source source = new VectorSource("custom-tile-source", new TileSet("2.1.0", "https://vector.mapzen.com/osm/all/{z}/{x}/{y}.mvt?api_key=vector-tiles-LM25tq4"));
-        mapboxMap.addSource(source);
+          counties.setProperties(
+            lineColor(Color.RED),
+            lineOpacity(0.75f),
+            lineWidth(5f)
+          );
+        } else {
+          Toast.makeText(RuntimeStyleActivity.this, "No counties layer in this style", Toast.LENGTH_SHORT).show();
+        }
+      }
+    }, 2000);
+  }
+
+  private void styleNumericFillLayer() {
+    mapboxMap.setStyleUrl("asset://numeric_filter_style.json");
+    mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(40, -97), 5));
+
+    Handler handler = new Handler(getMainLooper());
+    handler.postDelayed(new Runnable() {
+      @Override
+      public void run() {
+        if (mapboxMap == null) {
+          return;
+        }
 
-        //Add a layer
-        mapboxMap.addLayer(
-                new FillLayer("custom-tile-layers", "custom-tile-source")
-                        .withSourceLayer("water")
-        );
-    }
+        Timber.d("Styling numeric fill layer");
 
-    private void styleFillFilterLayer() {
-        mapboxMap.setStyleUrl("asset://fill_filter_style.json");
-        mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(31, -100), 3));
-
-        Handler handler = new Handler(getMainLooper());
-        handler.postDelayed(new Runnable() {
-            @Override
-            public void run() {
-                if (mapboxMap == null) {
-                    return;
-                }
-
-                Timber.d("Styling filtered fill layer");
-
-                FillLayer states = (FillLayer) mapboxMap.getLayer("states");
-
-                if (states != null) {
-                    states.setFilter(eq("name", "Texas"));
-
-                    states.setProperties(
-                            fillColor(Color.RED),
-                            fillOpacity(0.25f)
-                    );
-                } else {
-                    Toast.makeText(RuntimeStyleActivity.this, "No states layer in this style", Toast.LENGTH_SHORT).show();
-                }
-            }
-        }, 2000);
-    }
+        FillLayer regions = (FillLayer) mapboxMap.getLayer("regions");
 
-    private void styleLineFilterLayer() {
-        mapboxMap.setStyleUrl("asset://line_filter_style.json");
-        mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(40, -97), 5));
-
-        Handler handler = new Handler(getMainLooper());
-        handler.postDelayed(new Runnable() {
-            @Override
-            public void run() {
-                if (mapboxMap == null) {
-                    return;
-                }
-
-                Timber.d("Styling filtered line layer");
-
-                LineLayer counties = (LineLayer) mapboxMap.getLayer("counties");
-
-                if (counties != null) {
-                    counties.setFilter(eq("NAME10", "Washington"));
-
-                    counties.setProperties(
-                            lineColor(Color.RED),
-                            lineOpacity(0.75f),
-                            lineWidth(5f)
-                    );
-                } else {
-                    Toast.makeText(RuntimeStyleActivity.this, "No counties layer in this style", Toast.LENGTH_SHORT).show();
-                }
-            }
-        }, 2000);
-    }
+        if (regions != null) {
+          regions.setFilter(all(gte("HRRNUM", 200), lt("HRRNUM", 300)));
 
-    private void styleNumericFillLayer() {
-        mapboxMap.setStyleUrl("asset://numeric_filter_style.json");
-        mapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(40, -97), 5));
-
-        Handler handler = new Handler(getMainLooper());
-        handler.postDelayed(new Runnable() {
-            @Override
-            public void run() {
-                if (mapboxMap == null) {
-                    return;
-                }
-
-                Timber.d("Styling numeric fill layer");
-
-                FillLayer regions = (FillLayer) mapboxMap.getLayer("regions");
-
-                if (regions != null) {
-                    regions.setFilter(all(gte("HRRNUM", 200), lt("HRRNUM", 300)));
-
-                    regions.setProperties(
-                            fillColor(Color.BLUE),
-                            fillOpacity(0.5f)
-                    );
-                } else {
-                    Toast.makeText(RuntimeStyleActivity.this, "No regions layer in this style", Toast.LENGTH_SHORT).show();
-                }
-            }
-        }, 2000);
-    }
+          regions.setProperties(
+            fillColor(Color.BLUE),
+            fillOpacity(0.5f)
+          );
+        } else {
+          Toast.makeText(RuntimeStyleActivity.this, "No regions layer in this style", Toast.LENGTH_SHORT).show();
+        }
+      }
+    }, 2000);
+  }
 
-    private static class DefaultCallback implements MapboxMap.CancelableCallback {
+  private static class DefaultCallback implements MapboxMap.CancelableCallback {
 
-        @Override
-        public void onCancel() {
-            //noop
-        }
+    @Override
+    public void onCancel() {
+      //noop
+    }
 
-        @Override
-        public void onFinish() {
-            //noop
-        }
+    @Override
+    public void onFinish() {
+      //noop
     }
+  }
 }