Ensure we wait on the surface resize before returning from setting fullscreen mode.

android-project/app/src/main/java/org/libsdl/app/SDLActivity.java

@@ -643,7 +643,22 @@ public class SDLActivity extends Activity implements View.OnSystemUiVisibilityCh
         Message msg = commandHandler.obtainMessage();
         msg.arg1 = command;
         msg.obj = data;
-        return commandHandler.sendMessage(msg);
+        boolean result = commandHandler.sendMessage(msg);
+
+        // Ensure we don't return until the resize has actually happened,
+        // or 250ms have passed.
+        if (command == COMMAND_CHANGE_WINDOW_STYLE) {
+            synchronized(SDLActivity.getContext()) {
+                try {
+                    SDLActivity.getContext().wait(250);
+                }
+                catch (InterruptedException ie) {
+                    ie.printStackTrace();
+                }
+            }
+        }
+
+        return result;
     }
 
     // C functions we call
@@ -1577,6 +1592,10 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
         }
         catch ( java.lang.Throwable throwable ) {}
 
+        synchronized(SDLActivity.getContext()) {
+            SDLActivity.getContext().notifyAll();
+        }
+
         Log.v("SDL", "Window size: " + width + "x" + height);
         Log.v("SDL", "Device size: " + nDeviceWidth + "x" + nDeviceHeight);
         SDLActivity.onNativeResize(width, height, nDeviceWidth, nDeviceHeight, sdlFormat, mDisplay.getRefreshRate());

src/core/android/SDL_android.h

@@ -19,6 +19,7 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 #include "../../SDL_internal.h"
+#include "SDL_system.h"
 
 /* Set up for C function definitions, even when using C++ */
 #ifdef __cplusplus
@@ -53,6 +54,10 @@ extern int Android_JNI_CaptureAudioBuffer(void *buffer, int buflen);
 extern void Android_JNI_FlushCapturedAudio(void);
 extern void Android_JNI_CloseAudioDevice(const int iscapture);
 
+/* Detecting device type */
+extern SDL_bool Android_IsDeXMode();
+extern SDL_bool Android_IsChromebook();
+
 #include "SDL_rwops.h"
 
 int Android_JNI_FileOpen(SDL_RWops* ctx, const char* fileName, const char* mode);

src/video/android/SDL_androidwindow.c

@@ -27,6 +27,7 @@
 #include "../../events/SDL_keyboard_c.h"
 #include "../../events/SDL_mouse_c.h"
 #include "../../events/SDL_windowevents_c.h"
+#include "../../core/android/SDL_android.h"
 
 #include "SDL_androidvideo.h"
 #include "SDL_androidwindow.h"
@@ -109,6 +110,10 @@ Android_SetWindowFullscreen(_THIS, SDL_Window * window, SDL_VideoDisplay * displ
     // Samsung DeX or Chromebooks or other windowed Android environemtns, our window may 
     // still not be the full display size.
     //
+    if (!SDL_IsDeXMode() && !SDL_IsChromebook()) {
+        return;
+    }
+
     SDL_WindowData * data = (SDL_WindowData *)window->driverdata;
 
     if (!data || !data->native_window) {