[mobile] fix system ui bug

app/src/mobile/java/com/fongmi/android/tv/ui/activity/DetailActivity.java

@@ -4,6 +4,7 @@ import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
+import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.text.Html;
 import android.text.Layout;
@@ -15,6 +16,7 @@ import android.view.ViewTreeObserver;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -841,6 +843,18 @@ public class DetailActivity extends BaseActivity implements CustomKeyDownVod.Lis
         else if (isStop()) finish();
     }
 
+    @Override
+    public void onConfigurationChanged(@NonNull Configuration newConfig) {
+        super.onConfigurationChanged(newConfig);
+        if (isFullscreen()) Utils.hideSystemUI(this);
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus) {
+        super.onWindowFocusChanged(hasFocus);
+        if (isFullscreen() && hasFocus) Utils.hideSystemUI(this);
+    }
+
     @Override
     protected void onStart() {
         super.onStart();