Rendering Not Working Fine

Signed-off-by: Priyank Shankar <shankarpriyank312002@gmail.com>

android/src/com/androidAuto/HelloWorldScreen.java

@@ -1,21 +1,36 @@
 package com.androidAuto;
 
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.util.Log;
+import android.view.Surface;
+
 import androidx.annotation.NonNull;
+import androidx.car.app.AppManager;
 import androidx.car.app.CarContext;
 import androidx.car.app.Screen;
+import androidx.car.app.SurfaceCallback;
+import androidx.car.app.SurfaceContainer;
 import androidx.car.app.model.Action;
 import androidx.car.app.model.ActionStrip;
 import androidx.car.app.model.Template;
 import androidx.car.app.navigation.NavigationManager;
 import androidx.car.app.navigation.model.NavigationTemplate;
+import com.mapswithme.maps.BuildConfig;
+import com.mapswithme.maps.MapFragment;
 
 import static androidx.car.app.model.Action.BACK;
 
-public class HelloWorldScreen extends Screen
+public class HelloWorldScreen extends Screen implements SurfaceCallback
 {
+  private static final String TAG = "error";
+  private SurfaceCallback mSurfaceCallback;
+
   public HelloWorldScreen(@NonNull CarContext carContext)
   {
     super(carContext);
+
+    carContext.getCarService(AppManager.class).setSurfaceCallback(this);
   }
 
   @NonNull
@@ -24,11 +39,85 @@ public class HelloWorldScreen extends Screen
   {
     NavigationTemplate.Builder builder = new NavigationTemplate.Builder();
     Action back = BACK;
-
     ActionStrip.Builder actionStripBuilder = new ActionStrip.Builder();
     actionStripBuilder.addAction(back).addAction(new Action.Builder().setTitle("Test").build());
     builder.setActionStrip(actionStripBuilder.build());
     NavigationManager navigationManager = getCarContext().getCarService(NavigationManager.class);
     return builder.build();
   }
+
+  @Override
+  public void onSurfaceAvailable(@NonNull SurfaceContainer surfaceContainer)
+  {
+
+    int h = surfaceContainer.getHeight();
+    int w = surfaceContainer.getWidth();
+    Canvas canvas = null;
+
+    if (surfaceContainer.getSurface() != null)
+    {
+      canvas = surfaceContainer.getSurface()
+                               .lockCanvas(new Rect(Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE, Integer.MAX_VALUE));
+    }
+    else
+    {
+      Log.e("NPE", "Surface Not Available");
+    }
+    if (canvas == null)
+    {
+      Log.e("Nope", "Cannot draw onto the canvas as it's null");
+    }
+    else
+    {
+      Log.e("Draw", "Rendering Should be done successfully?");
+      Surface surface = surfaceContainer.getSurface();
+      MapFragment.nativeCreateEngine(surface, surface.lockHardwareCanvas()
+                                                     .getDensity(), false, true, BuildConfig.VERSION_CODE);
+      MapFragment.nativeAttachSurface(surface);
+      surfaceContainer.getSurface().unlockCanvasAndPost(canvas);
+    }
+  }
+
+  @Override
+  public void onVisibleAreaChanged(@NonNull Rect visibleArea)
+  {
+    SurfaceCallback.super.onVisibleAreaChanged(visibleArea);
+    Log.e("Something", "Lets see");
+  }
+
+  @Override
+  public void onStableAreaChanged(@NonNull Rect stableArea)
+  {
+    SurfaceCallback.super.onStableAreaChanged(stableArea);
+  }
+
+  @Override
+  public void onSurfaceDestroyed(@NonNull SurfaceContainer surfaceContainer)
+  {
+    SurfaceCallback.super.onSurfaceDestroyed(surfaceContainer);
+  }
+
+  @Override
+  public void onScroll(float distanceX, float distanceY)
+  {
+    SurfaceCallback.super.onScroll(distanceX, distanceY);
+  }
+
+  @Override
+  public void onFling(float velocityX, float velocityY)
+  {
+    SurfaceCallback.super.onFling(velocityX, velocityY);
+  }
+
+  @Override
+  public void onScale(float focusX, float focusY, float scaleFactor)
+  {
+    SurfaceCallback.super.onScale(focusX, focusY, scaleFactor);
+  }
+
+  @Override
+  public void onClick(float x, float y)
+  {
+    SurfaceCallback.super.onClick(x, y);
+  }
 }

android/src/com/mapswithme/maps/MapFragment.java

@@ -394,11 +394,11 @@ public class MapFragment extends BaseMwmFragment
   public static native boolean nativeShowMapForUrl(String url);
   static native boolean nativeIsEngineCreated();
   static native boolean nativeDestroySurfaceOnDetach();
-  private static native boolean nativeCreateEngine(Surface surface, int density,
+  public static native boolean nativeCreateEngine(Surface surface, int density,
                                                    boolean firstLaunch,
                                                    boolean isLaunchByDeepLink,
                                                    int appVersionCode);
-  private static native boolean nativeAttachSurface(Surface surface);
+  public static native boolean nativeAttachSurface(Surface surface);
   private static native void nativeDetachSurface(boolean destroySurface);
   private static native void nativePauseSurfaceRendering();
   private static native void nativeResumeSurfaceRendering();