// AddContactActivity.kt
   import android.os.Bundle
   import androidx.activity.compose.setContent
   import androidx.appcompat.app.AppCompatActivity
   import androidx.compose.runtime.getValue
   import androidx.compose.runtime.mutableStateOf
   import androidx.compose.runtime.remember
   import androidx.compose.runtime.setValue
   import io.trtc.tuikit.atomicx.contactlist.ui.addfriendandgroup.AddContactAndGroupBottomSheet
   import io.trtc.tuikit.atomicx.contactlist.viewmodels.AddType
   import io.trtc.tuikit.atomicxcore.api.CompletionHandler
   import io.trtc.tuikit.atomicxcore.api.login.LoginStore

   class AddContactActivity : AppCompatActivity() {

       private val sdkAppID: Int = 1234567890 // TODO: Fill in your sdkAppID here
       private val userID = "" // TODO: Fill in your userID here
       private val userSig = "" // TODO: Fill in your generated userSig here

       override fun onCreate(savedInstanceState: Bundle?) {
           super.onCreate(savedInstanceState)
           login()
       }

       private fun login() {
           LoginStore.shared.login(this, sdkAppID, userID, userSig, object : CompletionHandler {
               override fun onSuccess() {
                   showAddContactPage()
               }
               override fun onFailure(code: Int, desc: String) {
                   // Handle login failure
               }
           })
       }

       private fun showAddContactPage() {
           setContent {
               var showSheet by remember { mutableStateOf(true) }

               if (showSheet) {
                   AddContactAndGroupBottomSheet(
                       addType = AddType.CONTACT,
                       onDismiss = { showSheet = false }
                   )
               }
           }
       }
   }