diff --git a/.github/workflows/gradle-publish.yml b/.github/workflows/gradle-publish.yml
index 97def9f..cd87be9 100644
--- a/.github/workflows/gradle-publish.yml
+++ b/.github/workflows/gradle-publish.yml
@@ -23,11 +23,33 @@ jobs:
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
 
-      - name: Build with Gradle
-        run: ./gradlew assembleDebug
+      - name: Generate debug keystore for release signing
+        run: |
+          keytool -genkeypair \
+            -keystore debug.keystore \
+            -storepass android \
+            -alias androiddebugkey \
+            -keypass android \
+            -keyalg RSA \
+            -keysize 2048 \
+            -validity 10000 \
+            -dname "CN=Android Debug,O=Android,C=US"
+
+      - name: Configure signing for release build
+        run: |
+          echo "android.enableJetifier=true" >> gradle.properties
+          echo "android.useAndroidX=true" >> gradle.properties
+          echo "org.gradle.parallel=true" >> gradle.properties
+          echo "android.debug.keystore=debug.keystore" >> gradle.properties
+          echo "android.debug.storePassword=android" >> gradle.properties
+          echo "android.debug.keyPassword=android" >> gradle.properties
+          echo "android.debug.keyAlias=androiddebugkey" >> gradle.properties
+
+      - name: Build release APK
+        run: ./gradlew assembleRelease
 
       - name: Upload APK
         uses: actions/upload-artifact@v4
         with:
-          name: app-debug
-          path: app/build/outputs/apk/debug/app-debug.apk
+          name: app-release
+          path: app/build/outputs/apk/release/app-release.apk
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 40e9624..d2f2d3d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -51,9 +51,6 @@ dependencies {
     // CameraX Extensions (Effects) - Optional
     implementation "androidx.camera:camera-extensions:${camerax_version}"
     
-    // Google Play Services for location
-    implementation 'com.google.android.gms:play-services-location:21.0.1'
-    
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 00aede0..bcb8d41 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,9 +6,6 @@
     <!-- 相机权限 -->
     <uses-permission android:name="android.permission.CAMERA" />
     
-    <!-- 位置权限 -->
-    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
-    
     <!-- 硬件功能声明 -->
     <uses-feature android:name="android.hardware.camera" android:required="true" />
     <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
diff --git a/app/src/main/java/com/example/app/CameraActivity.kt b/app/src/main/java/com/example/app/CameraActivity.kt
index 73844ab..1b6aa8a 100644
--- a/app/src/main/java/com/example/app/CameraActivity.kt
+++ b/app/src/main/java/com/example/app/CameraActivity.kt
@@ -40,8 +40,7 @@ class CameraActivity : AppCompatActivity() {
         private const val TAG = "LogCam"
         private const val REQUEST_CODE_PERMISSIONS = 10
         private val REQUIRED_PERMISSIONS = arrayOf(
-            Manifest.permission.CAMERA,
-            Manifest.permission.ACCESS_FINE_LOCATION
+            Manifest.permission.CAMERA
         )
     }
 
@@ -51,8 +50,6 @@ class CameraActivity : AppCompatActivity() {
     private lateinit var photoPreviewLayout: LinearLayout
     private var imageCapture: ImageCapture? = null
     private lateinit var cameraExecutor: ExecutorService
-    private var locationManagerHelper: LocationManagerHelper? = null
-    private var currentLocation: Location? = null
     
     // 存储拍摄的图片URI
     private val capturedImageUris = mutableListOf<Uri>()
@@ -272,42 +269,8 @@ class CameraActivity : AppCompatActivity() {
         }
     }
 
-    private fun getAddressFromLocation(location: Location): String {
-        val geocoder = Geocoder(this, Locale.getDefault())
-        
-        return try {
-            val addresses = geocoder.getFromLocation(
-                location.latitude,
-                location.longitude,
-                1
-            )
-            
-            if (addresses != null && addresses.isNotEmpty()) {
-                val address = addresses[0]
-                "${address.locality}, ${address.subLocality}, ${address.thoroughfare}"
-            } else {
-                "${location.latitude.roundToInt()}, ${location.longitude.roundToInt()}"
-            }
-        } catch (e: Exception) {
-            Log.e(TAG, "无法解析地址: ${e.message}")
-            "${location.latitude.roundToInt()}, ${location.longitude.roundToInt()}"
-        }
-    }
-
-    private fun getLocationString(): String {
-        val location = getCurrentLocation()
-        return if (location != null) {
-            getAddressFromLocation(location)
-        } else {
-            "未知位置"
-        }
-    }
-
     private fun addWatermarkToBitmap(originalBitmap: Bitmap): Bitmap {
         val timestamp = SimpleDateFormat("yyyy年-MM月-dd日 HH:mm:ss", Locale.getDefault()).format(Date())
-        val location = getLocationString()
-        
-        val watermarkText = "$timestamp\n$location"
         
         val mutableBitmap = originalBitmap.copy(Bitmap.Config.ARGB_8888, true)
         val canvas = Canvas(mutableBitmap)
@@ -319,13 +282,13 @@ class CameraActivity : AppCompatActivity() {
             setShadowLayer(5f, 0f, 0f, Color.BLACK)
         }
         
-        val textWidth = paint.measureText(watermarkText)
+        val textWidth = paint.measureText(timestamp)
         val textHeight = paint.descent() - paint.ascent()
         
         val x = 20f
         val y = mutableBitmap.height - textHeight - 20f
         
-        canvas.drawText(watermarkText, x, y, paint)
+        canvas.drawText(timestamp, x, y, paint)
         
         return mutableBitmap
     }