add button to show qrcode with you private key

app/src/main/java/com/greenart7c3/nostrsigner/ui/QrCodeDrawer.kt

@@ -6,7 +6,6 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.defaultMinSize
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
@@ -34,13 +33,13 @@ fun QrCodeDrawer(contents: String, modifier: Modifier = Modifier) {
         createQrCode(contents = contents)
     }
 
-    val foregroundColor = MaterialTheme.colorScheme.onSurface
+    val foregroundColor = Color.Black
 
     Box(
         modifier = modifier
             .defaultMinSize(48.dp, 48.dp)
             .aspectRatio(1f)
-            .background(MaterialTheme.colorScheme.background)
+            .background(Color.White)
     ) {
         Canvas(modifier = Modifier.fillMaxSize()) {
             // Calculate the height and width of each column/row

app/src/main/java/com/greenart7c3/nostrsigner/ui/actions/AccountBackupDialog.kt

@@ -18,13 +18,18 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Key
+import androidx.compose.material.icons.filled.QrCode
 import androidx.compose.material3.Button
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.ClipboardManager
@@ -38,8 +43,10 @@ import androidx.compose.ui.window.DialogProperties
 import com.greenart7c3.nostrsigner.R
 import com.greenart7c3.nostrsigner.models.Account
 import com.greenart7c3.nostrsigner.service.Biometrics
+import com.greenart7c3.nostrsigner.ui.QrCodeDrawer
 import com.greenart7c3.nostrsigner.ui.components.CloseButton
 import com.greenart7c3.nostrsigner.ui.theme.ButtonBorder
+import com.greenart7c3.nostrsigner.ui.theme.Size35dp
 import com.halilibo.richtext.markdown.Markdown
 import com.halilibo.richtext.ui.RichTextStyle
 import com.halilibo.richtext.ui.material3.Material3RichText
@@ -89,6 +96,7 @@ fun AccountBackupDialog(account: Account, onClose: () -> Unit) {
                     Spacer(modifier = Modifier.height(30.dp))
 
                     NSecCopyButton(account)
+                    NSecQrButton(account)
                     NPubCopyButton(account)
                 }
             }
@@ -96,6 +104,102 @@ fun AccountBackupDialog(account: Account, onClose: () -> Unit) {
     }
 }
 
+@Composable
+private fun NSecQrButton(
+    account: Account
+) {
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+    var showDialog by remember {
+        mutableStateOf(false)
+    }
+
+    if (showDialog) {
+        QrCodeDialog(
+            content = account.keyPair.privKey!!.toNsec()
+        ) {
+            showDialog = false
+        }
+    }
+
+    val keyguardLauncher =
+        rememberLauncherForActivityResult(ActivityResultContracts.StartActivityForResult()) { result: ActivityResult ->
+            if (result.resultCode == Activity.RESULT_OK) {
+                showDialog = true
+            }
+        }
+
+    Button(
+        modifier = Modifier.padding(horizontal = 3.dp),
+        onClick = {
+            Biometrics.authenticate(
+                title = context.getString(R.string.show_qr_code),
+                context = context,
+                scope = scope,
+                keyguardLauncher = keyguardLauncher
+            ) {
+                showDialog = true
+            }
+        },
+        shape = ButtonBorder,
+        contentPadding = PaddingValues(vertical = 6.dp, horizontal = 16.dp)
+    ) {
+        Icon(
+            tint = MaterialTheme.colorScheme.onPrimary,
+            imageVector = Icons.Default.QrCode,
+            contentDescription = stringResource(R.string.shows_qr_code_with_you_private_key),
+            modifier = Modifier.padding(end = 5.dp)
+        )
+        Text(
+            stringResource(id = R.string.show_qr_code),
+            color = MaterialTheme.colorScheme.onPrimary
+        )
+    }
+}
+
+@Composable
+private fun QrCodeDialog(content: String, onClose: () -> Unit) {
+    Dialog(
+        onDismissRequest = onClose,
+        properties = DialogProperties(usePlatformDefaultWidth = false)
+    ) {
+        Surface(modifier = Modifier.fillMaxSize()) {
+            Column(
+                modifier = Modifier
+                    .background(MaterialTheme.colorScheme.background)
+                    .fillMaxSize()
+            ) {
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(10.dp),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    CloseButton(onCancel = onClose)
+                }
+
+                Column(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(horizontal = 30.dp),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    verticalArrangement = Arrangement.Center
+                ) {
+                    Row(
+                        horizontalArrangement = Arrangement.Center,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(horizontal = Size35dp)
+                    ) {
+                        QrCodeDrawer(content)
+                    }
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun NSecCopyButton(
     account: Account

app/src/main/res/values/strings.xml

@@ -74,4 +74,6 @@
     <string name="opensats_uri">https://opensats.org</string>
     <string name="amber_github_uri">https://github.com/greenart7c3/amber</string>
     <string name="made_possible_by">Made possible by</string>
+    <string name="show_qr_code">Show QR Code</string>
+    <string name="shows_qr_code_with_you_private_key">Shows QR Code with you private key</string>
 </resources>