calibrate android brightness

Flutter/android/src/main/java/com/tencent/vod/flutter/SuperPlayerPlugin.java

@@ -102,11 +102,9 @@ public class SuperPlayerPlugin implements FlutterPlugin, ActivityAware,
         @Override
         public void onChange(boolean selfChange, @NonNull Collection<Uri> uris, int flags) {
             super.onChange(selfChange, uris, flags);
-            if (mEngineHolder.isInForeground()) {
             double systemBrightness = getSystemScreenBrightness();
             setWindowBrightness(systemBrightness);
         }
-        }
     };
 
     @Override
@@ -303,7 +301,9 @@ public class SuperPlayerPlugin implements FlutterPlugin, ActivityAware,
             // 保留两位小数
             BigDecimal bigDecimal = new BigDecimal(brightness);
             brightness = bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
+            if (null != mActivityPluginBinding && !mActivityPluginBinding.getActivity().isDestroyed()) {
                 Window window = mActivityPluginBinding.getActivity().getWindow();
+                if (null != window) {
                     WindowManager.LayoutParams params = window.getAttributes();
                     params.screenBrightness = Float.parseFloat(String.valueOf(brightness));
                     if (params.screenBrightness > 1.0f) {
@@ -317,6 +317,8 @@ public class SuperPlayerPlugin implements FlutterPlugin, ActivityAware,
                     mEventSink.success(getParams(FTXEvent.EVENT_BRIGHTNESS_CHANGED, null));
                 }
             }
+        }
+    }
 
     /**
      * Get the current window brightness. If the current window brightness is not assigned,
@@ -340,10 +342,12 @@ public class SuperPlayerPlugin implements FlutterPlugin, ActivityAware,
     private float getSystemScreenBrightness() {
         float screenBrightness = -1;
         try {
+            if (null != mActivityPluginBinding && !mActivityPluginBinding.getActivity().isDestroyed()) {
                 ContentResolver resolver = mActivityPluginBinding.getActivity().getContentResolver();
                 final int brightnessInt = Settings.System.getInt(resolver, Settings.System.SCREEN_BRIGHTNESS);
                 final float maxBrightness = CommonUtil.getBrightnessMax();
                 screenBrightness = brightnessInt / maxBrightness;
+            }
         } catch (SettingNotFoundException e) {
             e.printStackTrace();
         }

Flutter/example/lib/demo_superplayer.dart

@@ -417,8 +417,6 @@ class _DemoSuperPlayerState extends State<DemoSuperPlayer> with TXPipPlayerResto
     // must invoke when page exit.
     _controller.releasePlayer();
     simpleEventSubscription?.cancel();
-    // restore page brightness
-    SuperPlayerPlugin.restorePageBrightness();
     super.dispose();
   }
 

Flutter/superplayer_widget/lib/ui/superplayer_more_view.dart

@@ -300,6 +300,7 @@ class _SuperPlayerMoreViewState extends State<SuperPlayerMoreView> {
   void dispose() {
     super.dispose();
     eventSubscription?.cancel();
+    SuperPlayerPlugin.restorePageBrightness();
   }
 }