diff --git a/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java b/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
index 072ae43..c26c4bc 100644
--- a/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
+++ b/android/src/main/java/top/jerryyan/RN/A/VersionUpgrade/UpgradeModule.java
@@ -68,30 +68,28 @@ public class UpgradeModule extends ReactContextBaseJavaModule {
         }
     }
 
-    void _alertDialog(){
+    private void _alertDialog(){
         final UpgradeModule that = this;
         AlertDialog dialog = new AlertDialog.Builder(reactContext.getCurrentActivity())
-                .setTitle(TITLE)
-                .setMessage(CONTENT)
-                .setNeutralButton("取消",
-                        new DialogInterface.OnClickListener() {
-                            @Override
-                            public void onClick(DialogInterface dialog, int which) {
-                                dialog.dismiss();
-                            }
+            .setTitle(TITLE)
+            .setMessage(CONTENT)
+            .setNeutralButton("取消",
+                    new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            dialog.dismiss();
                         }
-                )
-                .setNegativeButton("更新",
-                        new DialogInterface.OnClickListener() {
-                            @Override
-                            public void onClick(DialogInterface dialog, int which) {
-                                that._startDownload();
-                            }
+                    }
+            )
+            .setNegativeButton("更新",
+                    new DialogInterface.OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            that._startDownload();
                         }
-                )
-                .show();
-        dialog.setCanceledOnTouchOutside(true);//可选
-        dialog.setCancelable(true);//可选
+                    }
+            )
+            .show();
     }
 
     private void _startDownload(){