diff --git a/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java b/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java
index 137efe5..eb2f7af 100644
--- a/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java
+++ b/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java
@@ -10,6 +10,9 @@
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
 import java.util.List;
 import java.util.Timer;
 
@@ -117,7 +120,10 @@
         updateState(rid);
         updateDno(rid, nickName);
     }
-    public void putDrawing(){
-
+    public String putDrawing(){
+        String source = "サンプル";
+        Charset charset = StandardCharsets.UTF_8;
+        String result = Base64.getEncoder().encodeToString(source.getBytes(charset));
+        return result;
     }
 }