diff --git a/app/build.gradle b/app/build.gradle
index 11e1e3e..02d3697 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,6 +14,7 @@ android {
         versionCode 1
         versionName "1.0"
         multiDexEnabled true
+        multiDexKeepProguard file('multidex-config.pro')
 
         ndk {
             abiFilters "armeabi-v7a", "arm64-v8a"
diff --git a/app/multidex-config.pro b/app/multidex-config.pro
new file mode 100644
index 0000000..9a86dca
--- /dev/null
+++ b/app/multidex-config.pro
@@ -0,0 +1,3 @@
+# 强制保留在 main dex，避免 Android 4.x Dalvik multidex 加载失败
+-keep class androidx.startup.** { *; }
+-keep class com.google.android.exoplayer2.** { *; }