add error dialog to home screen

tamaskr · Oct 11, 2022 · 577f5d1 · 577f5d1
1 parent b2cc859
commit 577f5d1
Showing 1 changed file with 25 additions and 5 deletions.
diff --git a/app/src/main/java/com/virtualtag/app/ui/screens/HomeScreen.kt b/app/src/main/java/com/virtualtag/app/ui/screens/HomeScreen.kt
@@ -1,29 +1,41 @@
 package com.virtualtag.app.ui.screens
 
+import android.nfc.NfcAdapter
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Scaffold
 import androidx.compose.material.Surface
 import androidx.compose.material.Text
-import androidx.compose.runtime.Composable
+import androidx.compose.runtime.*
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
-import com.virtualtag.app.ui.components.CardContainer
-import com.virtualtag.app.ui.components.Logo
-import com.virtualtag.app.ui.components.PrimaryButton
 import com.virtualtag.app.ui.theme.BlackBG
 import com.virtualtag.app.utils.stringToColor
 import com.virtualtag.app.viewmodels.CardViewModel
 import com.virtualtag.app.R
+import com.virtualtag.app.ui.components.*
 
 @Composable
 fun HomeScreen(model: CardViewModel, viewCard: (id: String) -> Unit, scanCard: () -> Unit) {
+ val context = LocalContext.current
  val cardList = model.getAllCards().observeAsState(listOf())
+ var errorDialogOpen by remember { mutableStateOf(false) }
+
+ // Set up NFC adapter
+ val adapter = NfcAdapter.getDefaultAdapter(context)
+
+ // Check if the phone has NFC sensor and show error if sensor is not available
+ fun onScanClick() {
+ if (adapter != null) return scanCard()
+ errorDialogOpen = true
+ }
+
  Scaffold {
  Surface(
  modifier = Modifier
@@ -54,8 +66,16 @@ fun HomeScreen(model: CardViewModel, viewCard: (id: String) -> Unit, scanCard: (
  }
  }
  }
- PrimaryButton(text = stringResource(R.string.scan_new_card), onClick = scanCard)
+ PrimaryButton(
+ text = stringResource(R.string.scan_new_card),
+ onClick = { onScanClick() })
  }
  }
  }
+
+ if (errorDialogOpen) {
+ NfcErrorDialog(
+ closeDialog = { errorDialogOpen = false },
+ )
+ }
 }