[Android] Improve handling of keyboard, dpad and gamepad events

Thanks Dimitris Zenios for the report!

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

@@ -600,18 +600,10 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
     @Override
     public boolean onKey(View  v, int keyCode, KeyEvent event) {
         // Dispatch the different events depending on where they come from
-        if(event.getSource() == InputDevice.SOURCE_KEYBOARD) {
-            if (event.getAction() == KeyEvent.ACTION_DOWN) {
-                //Log.v("SDL", "key down: " + keyCode);
-                SDLActivity.onNativeKeyDown(keyCode);
-                return true;
-            }
-            else if (event.getAction() == KeyEvent.ACTION_UP) {
-                //Log.v("SDL", "key up: " + keyCode);
-                SDLActivity.onNativeKeyUp(keyCode);
-                return true;
-            }
-        } else if ( (event.getSource() & 0x00000401) != 0 || /* API 12: SOURCE_GAMEPAD */
+        // Some SOURCE_DPAD or SOURCE_GAMEPAD events appear to also be marked as SOURCE_KEYBOARD
+        // So, to avoid problems, we process DPAD or GAMEPAD events first.
+        
+        if ( (event.getSource() & 0x00000401) != 0 || /* API 12: SOURCE_GAMEPAD */
                    (event.getSource() & InputDevice.SOURCE_DPAD) != 0 ) {
             int id = SDLActivity.getJoyId( event.getDeviceId() );
             if (id != -1) {
@@ -623,6 +615,18 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
             }
             return true;
         }
+        else if( (event.getSource() & InputDevice.SOURCE_KEYBOARD) != 0) {
+            if (event.getAction() == KeyEvent.ACTION_DOWN) {
+                //Log.v("SDL", "key down: " + keyCode);
+                SDLActivity.onNativeKeyDown(keyCode);
+                return true;
+            }
+            else if (event.getAction() == KeyEvent.ACTION_UP) {
+                //Log.v("SDL", "key up: " + keyCode);
+                SDLActivity.onNativeKeyUp(keyCode);
+                return true;
+            }
+        }
         
         return false;
     }