[android] re-implemented the fps listener api

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java

@@ -435,21 +435,6 @@ public class MapView extends FrameLayout {
     nativeMapView.onLowMemory();
   }
 
-  // Called when debug mode is enabled to update a FPS counter
-  // Called via JNI from NativeMapView
-  // Forward to any listener
-  protected void onFpsChanged(final double fps) {
-    final MapboxMap.OnFpsChangedListener listener = mapboxMap.getOnFpsChangedListener();
-    if (listener != null) {
-      post(new Runnable() {
-        @Override
-        public void run() {
-          listener.onFpsChanged(fps);
-        }
-      });
-    }
-  }
-
   /**
    * <p>
    * Loads a new map style from the specified URL.

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapboxMap.java

@@ -1711,6 +1711,7 @@ public final class MapboxMap {
    */
   public void setOnFpsChangedListener(@Nullable OnFpsChangedListener listener) {
     onFpsChangedListener = listener;
+    nativeMapView.setOnFpsChangedListener(listener);
   }
 
   // used by MapView

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/NativeMapView.java

@@ -20,7 +20,6 @@ import com.mapbox.mapboxsdk.geometry.LatLng;
 import com.mapbox.mapboxsdk.geometry.LatLngBounds;
 import com.mapbox.mapboxsdk.geometry.ProjectedMeters;
 import com.mapbox.mapboxsdk.maps.renderer.MapRenderer;
-import com.mapbox.mapboxsdk.maps.renderer.MapRendererScheduler;
 import com.mapbox.mapboxsdk.storage.FileSource;
 import com.mapbox.mapboxsdk.style.layers.CannotAddLayerException;
 import com.mapbox.mapboxsdk.style.layers.Filter;
@@ -54,7 +53,7 @@ final class NativeMapView {
   private final FileSource fileSource;
 
   // Used to schedule work on the MapRenderer Thread
-  private MapRendererScheduler scheduler;
+  private MapRenderer mapRenderer;
 
   // Device density
   private final float pixelRatio;
@@ -71,7 +70,7 @@ final class NativeMapView {
   //
 
   public NativeMapView(final MapView mapView, MapRenderer mapRenderer) {
-    this.scheduler = mapRenderer;
+    this.mapRenderer = mapRenderer;
     this.mapView = mapView;
 
     Context context = mapView.getContext();
@@ -106,7 +105,7 @@ final class NativeMapView {
       return;
     }
 
-    scheduler.requestRender();
+    mapRenderer.requestRender();
   }
 
   public void resizeView(int width, int height) {
@@ -510,13 +509,6 @@ final class NativeMapView {
     return nativeGetDebug();
   }
 
-  public void setEnableFps(boolean enable) {
-    if (isDestroyedOn("setEnableFps")) {
-      return;
-    }
-    nativeSetEnableFps(enable);
-  }
-
   public boolean isFullyLoaded() {
     if (isDestroyedOn("isFullyLoaded")) {
       return false;
@@ -835,13 +827,6 @@ final class NativeMapView {
     }
   }
 
-  protected void onFpsChanged(double fps) {
-    if (isDestroyedOn("OnFpsChanged")) {
-      return;
-    }
-    mapView.onFpsChanged(fps);
-  }
-
   protected void onSnapshotReady(Bitmap mapContent) {
     if (isDestroyedOn("OnSnapshotReady")) {
       return;
@@ -947,8 +932,6 @@ final class NativeMapView {
 
   private native boolean nativeGetDebug();
 
-  private native void nativeSetEnableFps(boolean enable);
-
   private native boolean nativeIsFullyLoaded();
 
   private native void nativeSetReachability(boolean status);
@@ -1076,4 +1059,28 @@ final class NativeMapView {
     nativeTakeSnapshot();
   }
 
+  public void setOnFpsChangedListener(final MapboxMap.OnFpsChangedListener listener) {
+    mapRenderer.queueEvent(new Runnable() {
+
+      @Override
+      public void run() {
+        mapRenderer.setOnFpsChangedListener(new MapboxMap.OnFpsChangedListener() {
+
+          @Override
+          public void onFpsChanged(final double fps) {
+            mapView.post(new Runnable() {
+
+              @Override
+              public void run() {
+                listener.onFpsChanged(fps);
+              }
+
+            });
+          }
+
+        });
+      }
+
+    });
+  }
 }

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java

@@ -3,6 +3,7 @@ package com.mapbox.mapboxsdk.maps.renderer;
 import android.content.Context;
 import android.opengl.GLSurfaceView;
 
+import com.mapbox.mapboxsdk.maps.MapboxMap;
 import com.mapbox.mapboxsdk.storage.FileSource;
 
 import javax.microedition.khronos.egl.EGLConfig;
@@ -22,6 +23,8 @@ public class MapRenderer implements GLSurfaceView.Renderer, MapRendererScheduler
 
   private final GLSurfaceView glSurfaceView;
 
+  private MapboxMap.OnFpsChangedListener onFpsChangedListener;
+
   public MapRenderer(Context context, GLSurfaceView glSurfaceView) {
     this.glSurfaceView = glSurfaceView;
 
@@ -33,6 +36,10 @@ public class MapRenderer implements GLSurfaceView.Renderer, MapRendererScheduler
     nativeInitialize(this, fileSource, pixelRatio, programCacheDir);
   }
 
+  public void setOnFpsChangedListener(MapboxMap.OnFpsChangedListener listener) {
+    onFpsChangedListener = listener;
+  }
+
   @Override
   public void onSurfaceCreated(GL10 gl, EGLConfig config) {
     nativeOnSurfaceCreated();
@@ -65,6 +72,10 @@ public class MapRenderer implements GLSurfaceView.Renderer, MapRendererScheduler
   @Override
   public void onDrawFrame(GL10 gl) {
     nativeRender();
+
+    if (onFpsChangedListener != null) {
+      updateFps();
+    }
   }
 
   /**
@@ -116,4 +127,19 @@ public class MapRenderer implements GLSurfaceView.Renderer, MapRendererScheduler
 
   private native void nativeRender();
 
+  private long frames;
+  private long timeElapsed;
+
+  private void updateFps() {
+    frames++;
+    long currentTime = System.nanoTime();
+    double fps = 0;
+    if (currentTime - timeElapsed >= 1) {
+      fps = frames / ((currentTime - timeElapsed) / 1E9);
+      onFpsChangedListener.onFpsChanged(fps);
+      timeElapsed = currentTime;
+      frames = 0;
+    }
+  }
+
 }

platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/DebugModeActivity.java

@@ -26,6 +26,7 @@ import com.mapbox.mapboxsdk.style.layers.Property;
 import com.mapbox.mapboxsdk.testapp.R;
 
 import java.util.List;
+import java.util.Locale;
 
 import timber.log.Timber;
 
@@ -104,6 +105,17 @@ public class DebugModeActivity extends AppCompatActivity implements OnMapReadyCa
 
     setupNavigationView(mapboxMap.getLayers());
     setupZoomView();
+    setFpsView();
+  }
+
+  private void setFpsView() {
+    final TextView fpsView = (TextView) findViewById(R.id.fpsView);
+    mapboxMap.setOnFpsChangedListener(new MapboxMap.OnFpsChangedListener() {
+      @Override
+      public void onFpsChanged(double fps) {
+        fpsView.setText(String.format(Locale.US,"FPS: %4.2f", fps));
+      }
+    });
   }
 
   private void setupNavigationView(List<Layer> layerList) {

platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_debug_mode.xml

@@ -35,6 +35,17 @@
             app:layout_anchor="@id/bottom_sheet"
             app:layout_anchorGravity="bottom|start"/>
 
+        <TextView
+            android:id="@+id/fpsView"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="top|end"
+            android:layout_margin="8dp"
+            android:textIsSelectable="true"
+            android:textSize="14sp"
+            app:layout_anchor="@id/textZoom"
+            app:layout_anchorGravity="top"/>
+
         <android.support.v4.widget.NestedScrollView
             android:id="@+id/bottom_sheet"
             android:layout_width="match_parent"

platform/android/src/native_map_view.cpp

@@ -406,10 +406,6 @@ void NativeMapView::scheduleSnapshot(jni::JNIEnv&) {
     });
 }
 
-void NativeMapView::enableFps(jni::JNIEnv&, jni::jboolean enable) {
-    fpsEnabled = enable;
-}
-
 jni::Object<CameraPosition> NativeMapView::getCameraPosition(jni::JNIEnv& env) {
     return CameraPosition::New(env, map->getCameraOptions(insets));
 }
@@ -457,12 +453,10 @@ void NativeMapView::setDebug(JNIEnv&, jni::jboolean debug) {
     DebugOptions debugOptions = debug ? DebugOptions::TileBorders | DebugOptions::ParseStatus | DebugOptions::Collision
                                       : DebugOptions::NoDebug;
     map->setDebug(debugOptions);
-    fpsEnabled = debug;
 }
 
 void NativeMapView::cycleDebugOptions(JNIEnv&) {
     map->cycleDebugOptions();
-    fpsEnabled = map->getDebug() != DebugOptions::NoDebug;
 }
 
 jni::jboolean NativeMapView::getDebug(JNIEnv&) {
@@ -926,36 +920,6 @@ jni::jboolean NativeMapView::getPrefetchesTiles(JNIEnv&) {
     return jni::jboolean(map->getPrefetchZoomDelta() > 0);
 }
 
-// Private methods //
-
-// TODO
-void NativeMapView::updateFps() {
-    if (!fpsEnabled) {
-        return;
-    }
-
-    static int frames = 0;
-    static int64_t timeElapsed = 0LL;
-
-    frames++;
-    struct timespec now;
-    clock_gettime(CLOCK_MONOTONIC, &now);
-    int64_t currentTime = now.tv_sec * 1000000000LL + now.tv_nsec;
-
-    if (currentTime - timeElapsed >= 1) {
-        fps = frames / ((currentTime - timeElapsed) / 1E9);
-        mbgl::Log::Info(mbgl::Event::Render, "FPS: %4.2f", fps);
-        timeElapsed = currentTime;
-        frames = 0;
-    }
-
-    assert(vm != nullptr);
-
-    android::UniqueEnv _env = android::AttachEnv();
-    static auto onFpsChanged = javaClass.GetMethod<void (double)>(*_env, "onFpsChanged");
-    javaPeer->Call(*_env, onFpsChanged, fps);
-}
-
 // Static methods //
 
 jni::Class<NativeMapView> NativeMapView::javaClass;
@@ -1004,7 +968,6 @@ void NativeMapView::registerNative(jni::JNIEnv& env) {
             METHOD(&NativeMapView::setVisibleCoordinateBounds, "nativeSetVisibleCoordinateBounds"),
             METHOD(&NativeMapView::setContentPadding, "nativeSetContentPadding"),
             METHOD(&NativeMapView::scheduleSnapshot, "nativeTakeSnapshot"),
-            METHOD(&NativeMapView::enableFps, "nativeSetEnableFps"),
             METHOD(&NativeMapView::getCameraPosition, "nativeGetCameraPosition"),
             METHOD(&NativeMapView::updateMarker, "nativeUpdateMarker"),
             METHOD(&NativeMapView::addMarkers, "nativeAddMarkers"),

platform/android/src/native_map_view.hpp

@@ -142,8 +142,6 @@ public:
 
     void scheduleSnapshot(jni::JNIEnv&);
 
-    void enableFps(jni::JNIEnv&, jni::jboolean enable);
-
     jni::Object<CameraPosition> getCameraPosition(jni::JNIEnv&);
 
     void updateMarker(jni::JNIEnv&, jni::jlong, jni::jdouble, jni::jdouble, jni::String);
@@ -242,10 +240,6 @@ public:
 
     jni::jboolean getPrefetchesTiles(JNIEnv&);
 
-private:
-
-    void updateFps();
-
 private:
     std::unique_ptr<AndroidRendererFrontend> rendererFrontend;
 
@@ -258,8 +252,6 @@ private:
     std::string apiKey;
 
     float pixelRatio;
-    bool fpsEnabled = false;
-    double fps = 0.0;
 
     // Minimum texture size according to OpenGL ES 2.0 specification.
     int width = 64;