fix: can not show download result

app/src/main/java/com/lsp/view/ui/compose/PostActivity.kt

@@ -106,20 +106,15 @@ class PostActivity : ComponentActivity() {
                 val result =
                     downloadBinder.downloadImage(viewModel.uiState.value.selectPost?.fileUrl ?: "")
                         .await()
-                launch(Dispatchers.Main) {
-                    if (result.isSuccess) {
-                        Toast.makeText(
-                            this@PostActivity, "Download successful", Toast.LENGTH_SHORT
-                        ).show()
-                    } else {
-                        Toast.makeText(
-                            this@PostActivity, "Download fail", Toast.LENGTH_SHORT
-                        ).show()
-                    }
-                }
+                viewModel.setDownloadResult(result)
             }
         }
 
+        viewModel.downloadResult.observe(this){
+            val message = it.getOrThrow()
+            Toast.makeText(this,message.toString(),Toast.LENGTH_SHORT).show()
+        }
+
         val serviceIntent = Intent(this, DownloadService::class.java)
         bindService(serviceIntent, connection, BIND_AUTO_CREATE)
     }

app/src/main/java/com/lsp/view/ui/compose/PostViewModel.kt

@@ -10,6 +10,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
+import java.io.Serializable
 
 class PostViewModel:ViewModel() {
     private val _uiState = MutableStateFlow(PostUiState())
@@ -19,6 +20,7 @@ class PostViewModel:ViewModel() {
         PostRepository()
     }
     val downloadAction = MutableLiveData<Unit>()
+    val downloadResult = MutableLiveData<Result<Serializable>>()
 
     init {
         initData()
@@ -53,5 +55,9 @@ class PostViewModel:ViewModel() {
         }
     }
 
+    fun setDownloadResult(result: Result<Serializable>){
+        downloadResult.postValue(result)
+    }
+
 
 }