diff --git a/app/android/java/com/khronos/vulkan_samples/MainActivity.java b/app/android/java/com/khronos/vulkan_samples/MainActivity.java
index 7806f5e..ec80a9d 100644
--- a/app/android/java/com/khronos/vulkan_samples/MainActivity.java
+++ b/app/android/java/com/khronos/vulkan_samples/MainActivity.java
@@ -5,6 +5,7 @@ import android.Manifest;
 import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.WindowManager;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -45,7 +46,7 @@ public class MainActivity extends GameActivity implements FaceLandmarkerHelper.L
 
     private void detectFace(ImageProxy imageProxy) {
         faceLandmarkerHelper.detectLiveStream(
-                imageProxy,true
+                imageProxy,false
         );
     }
 
@@ -64,6 +65,10 @@ public class MainActivity extends GameActivity implements FaceLandmarkerHelper.L
         sendArgumentsToPlatform(argArray);
         super.onCreate(savedInstanceState);
 
+        // 隐藏状态栏
+        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
+                WindowManager.LayoutParams.FLAG_FULLSCREEN);
+
         initCamera();
 
         backgroundExecutor.execute(new Runnable() {
@@ -113,7 +118,7 @@ public class MainActivity extends GameActivity implements FaceLandmarkerHelper.L
                 cameraProvider = cameraProviderFuture.get();
 
                 CameraSelector cameraSelector = new CameraSelector.Builder()
-                        .requireLensFacing(CameraSelector.LENS_FACING_FRONT)
+                        .requireLensFacing(CameraSelector.LENS_FACING_BACK)
                         .build();
 
                 imageAnalyzer = new ImageAnalysis.Builder()
@@ -225,7 +230,9 @@ public class MainActivity extends GameActivity implements FaceLandmarkerHelper.L
             nativeBuffer.order(ByteOrder.nativeOrder());
         }
 
-
+        float offsetX = (640.f-480.f)/640.0f;
+        offsetX /= 2;
+        offsetX *= -1;
         int index = 0;
         // Iterate through each detected face
         for (List<NormalizedLandmark> faceLandmarks : faceLandmarkerResult.faceLandmarks()) {