fix login with amber

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/LoginScreen.kt

@@ -1,6 +1,10 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedOff
 
+import android.app.Activity
 import android.util.Log
+import android.widget.Toast
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.rememberScrollState
@@ -35,9 +39,12 @@ import androidx.compose.ui.text.input.*
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextDecoration
 import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ServiceManager
 import com.vitorpamplona.amethyst.service.AmberUtils
 import com.vitorpamplona.amethyst.service.PackageUtils
+import com.vitorpamplona.amethyst.ui.actions.SignerType
 import com.vitorpamplona.amethyst.ui.qrcode.SimpleQrCodeScanner
 import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.ConnectOrbotDialog
@@ -67,6 +74,57 @@ fun LoginPage(
     val proxyPort = remember { mutableStateOf("9050") }
     var connectOrbotDialogOpen by remember { mutableStateOf(false) }
     val scope = rememberCoroutineScope()
+    var loginWithAmber by remember { mutableStateOf(false) }
+    val activity = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.StartActivityForResult(),
+        onResult = {
+            loginWithAmber = false
+            AmberUtils.isActivityRunning = false
+            ServiceManager.shouldPauseService = true
+            if (it.resultCode != Activity.RESULT_OK) {
+                scope.launch(Dispatchers.Main) {
+                    Toast.makeText(
+                        Amethyst.instance,
+                        "Sign request rejected",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
+                return@rememberLauncherForActivityResult
+            } else {
+                val event = it.data?.getStringExtra("signature") ?: ""
+                key.value = TextFieldValue(event)
+                if (!acceptedTerms.value) {
+                    termsAcceptanceIsRequired =
+                        context.getString(R.string.acceptance_of_terms_is_required)
+                }
+
+                if (key.value.text.isBlank()) {
+                    errorMessage = context.getString(R.string.key_is_required)
+                }
+
+                if (acceptedTerms.value && key.value.text.isNotBlank()) {
+                    try {
+                        accountViewModel.startUI(key.value.text, useProxy.value, proxyPort.value.toInt(), true)
+                    } catch (e: Exception) {
+                        Log.e("Login", "Could not sign in", e)
+                        errorMessage = context.getString(R.string.invalid_key)
+                    }
+                }
+            }
+        }
+    )
+
+    LaunchedEffect(loginWithAmber) {
+        if (loginWithAmber) {
+            AmberUtils.openAmber(
+                "",
+                SignerType.GET_PUBLIC_KEY,
+                activity,
+                "",
+                ""
+            )
+        }
+    }
 
     Column(
         modifier = Modifier
@@ -299,27 +357,7 @@ fun LoginPage(
                 Box(modifier = Modifier.padding(40.dp, 40.dp, 40.dp, 0.dp)) {
                     Button(
                         onClick = {
-                            scope.launch(Dispatchers.IO) {
+                            loginWithAmber = true
-                                AmberUtils.loginWithAmber()
-                                key.value = TextFieldValue(AmberUtils.content)
-                                if (!acceptedTerms.value) {
-                                    termsAcceptanceIsRequired =
-                                        context.getString(R.string.acceptance_of_terms_is_required)
-                                }
-
-                                if (key.value.text.isBlank()) {
-                                    errorMessage = context.getString(R.string.key_is_required)
-                                }
-
-                                if (acceptedTerms.value && key.value.text.isNotBlank()) {
-                                    try {
-                                        accountViewModel.startUI(key.value.text, useProxy.value, proxyPort.value.toInt(), true)
-                                    } catch (e: Exception) {
-                                        Log.e("Login", "Could not sign in", e)
-                                        errorMessage = context.getString(R.string.invalid_key)
-                                    }
-                                }
-                            }
                         },
                         shape = RoundedCornerShape(Size35dp),
                         modifier = Modifier