diff --git a/api/application/Context.d.ts b/api/application/Context.d.ts
old mode 100644
new mode 100755
index db1912de8142d57364f82ba16183d882ec91ec3e..1e152565b5e77cf412cca1251bfe0be9f3a18cf0
--- a/api/application/Context.d.ts
+++ b/api/application/Context.d.ts
@@ -119,4 +119,21 @@ export default class Context {
      * @return application context
      */
     getApplicationContext(): Context;
+
+    /**
+     * Switch file area
+     *
+     * @devices phone, tablet, tv, wearable, car
+     * @since 9
+     * @sysCap AAFwk
+     * @param mode file area.
+     */
+    switchArea(mode: AreaMode): void;
+}
+
+export enum AreaMode {
+    EL1 = 0,
+    EL2 = 1,
+    EL3 = 2,
+    EL4 = 3
 }
\ No newline at end of file