diff --git a/android-example/app/libs/web-api.aar b/android-example/app/libs/web-api.aar
deleted file mode 100644
index be92dad..0000000
Binary files a/android-example/app/libs/web-api.aar and /dev/null differ
diff --git a/android-example/app/src/main/java/net/irext/ircontrol/utils/ToastUtils.java b/android-example/app/src/main/java/net/irext/ircontrol/utils/ToastUtils.java
new file mode 100644
index 0000000..b1696cf
--- /dev/null
+++ b/android-example/app/src/main/java/net/irext/ircontrol/utils/ToastUtils.java
@@ -0,0 +1,24 @@
+package net.irext.iris.utils;
+
+import android.content.Context;
+import android.widget.Toast;
+
+/**
+ * Filename:       ToastUtil.java
+ * Revised:        Date: 2020-10-24
+ * Revision:       Revision: 1.0
+ * <p>
+ * Description:    Utils of popup
+ * <p>
+ * Revision log:
+ * 2020-10-24: created by strawmanbobi
+ */
+public class ToastUtils {
+
+    public static void showToast(Context context, String text) {
+        int duration = Toast.LENGTH_SHORT;
+
+        Toast toast = Toast.makeText(context, text, duration);
+        toast.show();
+    }
+}