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 2c50ffa..1557c4c 100644
--- a/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java
+++ b/app/src/main/java/org/ntlab/irisclient/viewmodels/DrawingStateViewModel.java
@@ -1,14 +1,15 @@
 package org.ntlab.irisclient.viewmodels;
 
 
+import android.graphics.Bitmap;
+
 import org.ntlab.irisclient.resources.DrawingRest;
 import org.ntlab.irisclient.resources.RoomsRest;
 
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
+import java.io.ByteArrayOutputStream;
 import java.util.Base64;
 import java.util.List;
 
@@ -118,10 +119,12 @@
         updateState(rid);
         updateDno(rid, nickName);
     }
-    public String putDrawing(){
-        String string = "sample";
+    public String putDrawing(Bitmap image){
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        image.compress(Bitmap.CompressFormat.PNG, 100, stream);
+        byte[] byteArray = stream.toByteArray();
         Base64.Encoder encoder = Base64.getEncoder();
-        String encoded = encoder.encodeToString(string.getBytes());
+        String encoded = encoder.encodeToString(byteArray);
         return encoded;
     }
 }