android: refactor display cutouts

app/src/main/java/mw/gri/android/MainActivity.java

@@ -1,11 +1,12 @@
 package mw.gri.android;
 
+import android.hardware.SensorManager;
 import android.os.Bundle;
 import android.os.Process;
 import android.system.ErrnoException;
 import android.system.Os;
-import android.util.Log;
 import android.view.KeyEvent;
+import android.view.OrientationEventListener;
 import com.google.androidgamesdk.GameActivity;
 
 public class MainActivity extends GameActivity {
@@ -22,31 +23,23 @@ public class MainActivity extends GameActivity {
             throw new RuntimeException(e);
         }
         super.onCreate(savedInstanceState);
+
+        OrientationEventListener orientationEventListener = new OrientationEventListener(this,
+                SensorManager.SENSOR_DELAY_GAME) {
+            @Override
+            public void onOrientationChanged(int orientation) {
+                onDisplayCutoutsChanged(Utils.getDisplayCutouts(MainActivity.this));
+            }
+        };
+        if (orientationEventListener.canDetectOrientation()) {
+            orientationEventListener.enable();
+        }
+        onDisplayCutoutsChanged(Utils.getDisplayCutouts(MainActivity.this));
+
         BackgroundService.start(getApplicationContext());
     }
 
-    @Override
-    protected void onDestroy() {
-        if (!mManualExit) {
-            BackgroundService.stop(getApplicationContext());
-            // Temporary fix to prevent app hanging when closed from recent apps
-            Process.killProcess(Process.myPid());
-        }
-        super.onDestroy();
-    }
-
-    public int[] getDisplayCutouts() {
-        return Utils.getDisplayCutouts(this);
-    }
-
-    private boolean mManualExit = false;
-
-    // Called from native code
-    public void onExit() {
-        mManualExit = true;
-        BackgroundService.stop(getApplicationContext());
-        finish();
-    }
+    native void onDisplayCutoutsChanged(int[] cutouts);
 
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
@@ -58,4 +51,24 @@ public class MainActivity extends GameActivity {
     }
 
     public native void onBackButtonPress();
+
+    @Override
+    protected void onDestroy() {
+        if (!mManualExit) {
+            BackgroundService.stop(getApplicationContext());
+            // Temporary fix to prevent app hanging when closed from recent apps
+            Process.killProcess(Process.myPid());
+        }
+        super.onDestroy();
+    }
+
+
+    private boolean mManualExit = false;
+
+    // Called from native code
+    public void onExit() {
+        mManualExit = true;
+        BackgroundService.stop(getApplicationContext());
+        finish();
+    }
 }