diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index cf0f580..9efde7e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -61,6 +61,25 @@ android {
     }
     buildFeatures {
         viewBinding = true
+        buildConfig = true
+    }
+
+    // 有 flavorDimensions 才能使用 productFlavors
+    flavorDimensions += "market"
+
+    productFlavors {
+        create("google") {
+            dimension = "market"
+            buildConfigField("String", "CHANNEL", "\"google\"")
+        }
+        create("samsung") {
+            dimension = "market"
+            buildConfigField("String", "CHANNEL", "\"samsung\"")
+        }
+        create("xiaomi") {
+            dimension = "market"
+            buildConfigField("String", "CHANNEL", "\"xiaomi\"")
+        }
     }
 }
 
diff --git a/app/src/main/java/com/all/pdfreader/pdf/reader/ui/adapter/SearchPdfAdapter.kt b/app/src/main/java/com/all/pdfreader/pdf/reader/ui/adapter/SearchPdfAdapter.kt
index daf7f41..d716e2c 100644
--- a/app/src/main/java/com/all/pdfreader/pdf/reader/ui/adapter/SearchPdfAdapter.kt
+++ b/app/src/main/java/com/all/pdfreader/pdf/reader/ui/adapter/SearchPdfAdapter.kt
@@ -75,7 +75,7 @@ class SearchPdfAdapter(
             holder.binding.tvFileImg.visibility = View.VISIBLE
             Glide.with(context)
                 .load(item.thumbnailPath)
-                .transform(CenterCrop(), RoundedCorners(8.dpToPx(context)))
+                .transform(CenterCrop(), RoundedCorners(4.dpToPx(context)))
                 .into(holder.binding.tvFileImg)
         }
         if (item.isFavorite) {
diff --git a/app/src/main/java/com/all/pdfreader/pdf/reader/util/AnalyticsUtils.kt b/app/src/main/java/com/all/pdfreader/pdf/reader/util/AnalyticsUtils.kt
index 71eb394..a99ef69 100644
--- a/app/src/main/java/com/all/pdfreader/pdf/reader/util/AnalyticsUtils.kt
+++ b/app/src/main/java/com/all/pdfreader/pdf/reader/util/AnalyticsUtils.kt
@@ -1,6 +1,7 @@
 package com.all.pdfreader.pdf.reader.util
 
 import android.os.Bundle
+import com.all.pdfreader.pdf.reader.BuildConfig
 import com.google.firebase.Firebase
 import com.google.firebase.analytics.FirebaseAnalytics
 import com.google.firebase.analytics.analytics
@@ -12,6 +13,7 @@ object AnalyticsUtils {
     fun init() {
         if (firebaseAnalytics == null) {
             firebaseAnalytics = Firebase.analytics
+            firebaseAnalytics?.setUserProperty("channel", BuildConfig.CHANNEL)
         }
     }