Update MainActivity.java

Author: Zenlua

app/src/main/java/com/example/rootfilepicker/MainActivity.java

@@ -98,7 +98,10 @@ protected void onCreate(Bundle savedInstanceState) {
             return false;
         });
 
-        btnSave.setOnClickListener(v -> saveSelectedPaths());
+        btnSave.setOnClickListener(v -> {
+    saveSelectedPaths();
+    finish(); // Thoát app sau khi lưu
+});
 
         if (checkPermission()) {
             initFilePicker();