diff --git a/android/src/main/java/top/jerryyan/RN/A/FitFullScreen/FitModule.java b/android/src/main/java/top/jerryyan/RN/A/FitFullScreen/FitModule.java
index 461a071..e461392 100644
--- a/android/src/main/java/top/jerryyan/RN/A/FitFullScreen/FitModule.java
+++ b/android/src/main/java/top/jerryyan/RN/A/FitFullScreen/FitModule.java
@@ -14,9 +14,11 @@ import java.util.Map;
 public class FitModule extends ReactContextBaseJavaModule {
     private final ReactApplicationContext reactContext;
     private final String MANUFACTURER = Build.MANUFACTURER;
+    private boolean FULLSCREEN = false;
 
     public FitModule(ReactApplicationContext reactContext) {
         super(reactContext);
+        this._checkFullScreen();
         this.reactContext = reactContext;
     }
 
@@ -29,6 +31,7 @@ public class FitModule extends ReactContextBaseJavaModule {
     public Map<String, Object> getConstants(){
         final Map<String, Object> constants = new HashMap<>();
         constants.put("MANUFACTURER", MANUFACTURER);
+        constants.put("FULLSCREEN", FULLSCREEN);
         return constants;
     }
 
@@ -45,11 +48,9 @@ public class FitModule extends ReactContextBaseJavaModule {
         }
     }
 
-    @ReactMethod
-    public void checkFullScreen(Promise promise){
-        if ("xiaomi".equalsIgnoreCase(MANUFACTURER)) {
-            promise.resolve(_isXiaoMiFullScreen());
+    private void _checkFullScreen(){
+        if ("xiaomi".equalsIgnoreCase(MANUFACTURER)){
+            this.FULLSCREEN = this._isXiaoMiFullScreen();
         }
-        promise.reject("E");
     }
 }