diff --git a/presenter/src/main/java/com/foke/together/presenter/screen/ShareScreen.kt b/presenter/src/main/java/com/foke/together/presenter/screen/ShareScreen.kt
index 10bf65b..0cea2ac 100644
--- a/presenter/src/main/java/com/foke/together/presenter/screen/ShareScreen.kt
+++ b/presenter/src/main/java/com/foke/together/presenter/screen/ShareScreen.kt
@@ -1,17 +1,10 @@
 package com.foke.together.presenter.screen
 
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
-import android.net.Uri
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.wrapContentSize
 import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Download
 import androidx.compose.material.icons.filled.Home
 import androidx.compose.material.icons.filled.Print
 import androidx.compose.material.icons.filled.Share
@@ -20,27 +13,18 @@ import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.State
-import androidx.compose.runtime.collectAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.tooling.preview.Preview
-import androidx.compose.ui.unit.dp
-import androidx.constraintlayout.compose.ChainStyle
 import androidx.constraintlayout.compose.ConstraintLayout
 import androidx.constraintlayout.compose.Dimension
 import androidx.core.content.FileProvider
 import androidx.core.net.toFile
-import com.foke.together.presenter.frame.FourCutFrame
 import com.foke.together.presenter.theme.FourCutTogetherTheme
-import com.foke.together.presenter.theme.highContrastDarkColorScheme
 import androidx.hilt.navigation.compose.hiltViewModel
-import androidx.lifecycle.Lifecycle
-import androidx.lifecycle.compose.LifecycleEventEffect
 import coil.compose.AsyncImage
 import coil.request.ImageRequest
-import com.foke.together.presenter.R
 import com.foke.together.presenter.viewmodel.ShareViewModel
 import com.foke.together.util.ImageFileUtil
 
@@ -50,8 +34,6 @@ fun ShareScreen(
     viewModel: ShareViewModel = hiltViewModel()
 ) {
     val context = LocalContext.current
-    val qrCodeBitmap: State<Bitmap> = viewModel.qrCodeBitmap.collectAsState(initial = Bitmap.createBitmap(
-        1,1,Bitmap.Config.ARGB_8888) )
     ConstraintLayout(
         modifier = Modifier.fillMaxSize()
     ) {
@@ -142,13 +124,14 @@ fun ShareScreen(
             ){
                 AsyncImage(
                     model = ImageRequest.Builder(context)
-                        .data(qrCodeBitmap.value)
+                        .data(viewModel.qrCodeBitmap)
                         .build(),
                     contentDescription = "qr code",
                     modifier = Modifier.fillMaxSize()
                 )
             }
 
+//            TODO: add android native share button
 //            IconButton(
 //                onClick = {
 //                viewModel.downloadImage()
diff --git a/presenter/src/main/java/com/foke/together/presenter/viewmodel/ShareViewModel.kt b/presenter/src/main/java/com/foke/together/presenter/viewmodel/ShareViewModel.kt
index e3ee0c8..7ef6798 100644
--- a/presenter/src/main/java/com/foke/together/presenter/viewmodel/ShareViewModel.kt
+++ b/presenter/src/main/java/com/foke/together/presenter/viewmodel/ShareViewModel.kt
@@ -3,6 +3,9 @@ package com.foke.together.presenter.viewmodel
 import android.content.Context
 import android.graphics.Bitmap
 import android.net.Uri
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.core.content.FileProvider
 import androidx.core.net.toFile
 import androidx.lifecycle.ViewModel
@@ -11,13 +14,11 @@ import com.foke.together.domain.interactor.GeneratePhotoFrameUseCase
 import com.foke.together.domain.interactor.GetQRCodeUseCase
 import com.foke.together.domain.interactor.web.GetDownloadUrlUseCase
 import com.foke.together.domain.interactor.web.SessionKeyUseCase
+import com.foke.together.util.AppLog
 import com.foke.together.util.AppPolicy
 import com.foke.together.util.ImageFileUtil
 import dagger.hilt.android.lifecycle.HiltViewModel
-import dagger.hilt.android.qualifiers.ActivityContext
 import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.launch
 import javax.inject.Inject
 
@@ -29,15 +30,16 @@ class ShareViewModel @Inject constructor(
     private val sessionKeyUseCase: SessionKeyUseCase,
     private val generatePhotoFrameUseCase: GeneratePhotoFrameUseCase
 ): ViewModel() {
-    val qrCodeBitmap: Flow<Bitmap> = flow{
-        val qrCodeBitmap = generateQRcode()
-        emit(qrCodeBitmap)
-    }
-
+    var qrCodeBitmap by mutableStateOf<Bitmap?>(null)
     val singleImageUri: Uri = generatePhotoFrameUseCase.getFinalSingleImageUri()
-
     val twoImageUri: Uri = generatePhotoFrameUseCase.getFinalTwoImageUri()
 
+    init {
+        viewModelScope.launch {
+            generateQRcode()
+        }
+    }
+
     fun downloadImage() {
         val imageBitmap = ImageFileUtil.getBitmapFromUri(context, singleImageUri)
         viewModelScope.launch {
@@ -49,19 +51,15 @@ class ShareViewModel @Inject constructor(
         }
     }
 
-    suspend fun generateQRcode(): Bitmap {
+    private suspend fun generateQRcode() {
         val sessionKey = sessionKeyUseCase.getSessionKey()
-        val downloadUrl:String = getDownloadUrlUseCase(sessionKey).toString()
-        if(downloadUrl.contains("Failure")){
-            return Bitmap.createBitmap(
-                1,1,Bitmap.Config.ARGB_8888)
+        val downloadUrl: String = getDownloadUrlUseCase(sessionKey).getOrElse { "https://4cuts.store" }
+
+        if (AppPolicy.isDebugMode) {
+            AppLog.e(TAG, "generateQRcode", "sessionKey: $sessionKey")
+            AppLog.e(TAG, "generateQRcode", "downloadUrl: $downloadUrl")
         }
-        return getQRCodeUseCase(sessionKey, downloadUrl)
-            // return a empty bitmap if the qr code generation fails
-                .getOrElse(
-                    return Bitmap.createBitmap(
-                        1,1,Bitmap.Config.ARGB_8888)
-                )
+        qrCodeBitmap =  getQRCodeUseCase(sessionKey, downloadUrl).getOrNull()
     }
 
     fun shareImage() {
@@ -76,4 +74,8 @@ class ShareViewModel @Inject constructor(
     fun printImage(activityContext: Context) {
         ImageFileUtil.printFromUri(activityContext,twoImageUri)
     }
+
+    companion object {
+        private val TAG = ShareViewModel::class.java.simpleName
+    }
 }
\ No newline at end of file