diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java index 83948efe4..cc1ffbbd3 100644 --- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java +++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/MapView.java @@ -421,6 +421,18 @@ public class MapView extends FrameLayout implements NativeMapView.ViewCallback { } } + /** + * The maximum frame rate at which the map view is rendered, + * but it can't excess the ability of device hardware. + * + * @param maximumFps Can be set to arbitrary integer values. + */ + public void setMaximumFps(int maximumFps) { + if (mapRenderer != null) { + mapRenderer.setMaximumFps(maximumFps); + } + } + /** * Returns if the map has been destroyed. *
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java
index 9617f94fc..a9bea9783 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/MapRenderer.java
@@ -27,6 +27,7 @@ public abstract class MapRenderer implements MapRendererScheduler {
// Holds the pointer to the native peer after initialisation
private long nativePtr = 0;
+ private double expectedRenderTime = 0;
private MapboxMap.OnFpsChangedListener onFpsChangedListener;
public MapRenderer(@NonNull Context context, String localIdeographFontFamily) {
@@ -75,11 +76,20 @@ public abstract class MapRenderer implements MapRendererScheduler {
@CallSuper
protected void onDrawFrame(GL10 gl) {
+ long startTime = System.nanoTime();
try {
nativeRender();
} catch (java.lang.Error error) {
Logger.e(TAG, error.getMessage());
}
+ long renderTime = System.nanoTime() - startTime;
+ if (renderTime < expectedRenderTime) {
+ try {
+ Thread.sleep((long) ((expectedRenderTime - renderTime) / 1E6));
+ } catch (InterruptedException ex) {
+ Logger.e(TAG, ex.getMessage());
+ }
+ }
if (onFpsChangedListener != null) {
updateFps();
}
@@ -115,18 +125,26 @@ public abstract class MapRenderer implements 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;
+ double fps = 1E9 / ((currentTime - timeElapsed));
+ onFpsChangedListener.onFpsChanged(fps);
+ timeElapsed = currentTime;
+ }
+
+ /**
+ * The max frame rate at which this render is rendered,
+ * but it can't excess the ability of device hardware.
+ *
+ * @param maximumFps Can be set to arbitrary integer values.
+ */
+ public void setMaximumFps(int maximumFps) {
+ if (maximumFps <= 0) {
+ // Not valid, just return
+ return;
}
+ expectedRenderTime = 1E9 / maximumFps;
}
}
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/DebugModeActivity.java b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/DebugModeActivity.java
index 88ab62a2e..796560bb8 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/DebugModeActivity.java
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/java/com/mapbox/mapboxsdk/testapp/activity/maplayout/DebugModeActivity.java
@@ -63,6 +63,7 @@ public class DebugModeActivity extends AppCompatActivity implements OnMapReadyCa
setupMapView(savedInstanceState);
setupDebugChangeView();
setupStyleChangeView();
+ setupFpsChangeView();
}
private void setupToolbar() {
@@ -172,6 +173,15 @@ public class DebugModeActivity extends AppCompatActivity implements OnMapReadyCa
});
}
+ private void setupFpsChangeView() {
+ findViewById(R.id.fps_30).setOnClickListener(view -> {
+ mapView.setMaximumFps(30);
+ });
+ findViewById(R.id.fps_60).setOnClickListener(view -> {
+ mapView.setMaximumFps(60);
+ });
+ }
+
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return actionBarDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
diff --git a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_debug_mode.xml b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_debug_mode.xml
index 2779ad7a0..1b185ab9c 100644
--- a/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_debug_mode.xml
+++ b/platform/android/MapboxGLAndroidSDKTestApp/src/main/res/layout/activity_debug_mode.xml
@@ -71,6 +71,29 @@
app:layout_anchor="@id/bottom_sheet"
app:layout_anchorGravity="bottom|end"/>
+
+
+