Add USB services restart warning

app/src/main/java/sh/sar/isodroid/ui/components/UsbWarningDialog.kt

@@ -0,0 +1,100 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Shiham Abdul Rahman <shihaam@shihaam.dev>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package sh.sar.isodroid.ui.components
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun UsbWarningDialog(
+    isUnmount: Boolean,
+    onDismiss: () -> Unit,
+    onConfirm: (dontShowAgain: Boolean) -> Unit
+) {
+    var dontShowAgain by remember { mutableStateOf(false) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text(
+                text = "USB Services Will Restart",
+                style = MaterialTheme.typography.headlineSmall
+            )
+        },
+        text = {
+            Column {
+                Text(
+                    text = if (isUnmount) {
+                        "Unmounting will restart USB services on your device, including:"
+                    } else {
+                        "Mounting will restart USB services on your device, including:"
+                    },
+                    style = MaterialTheme.typography.bodyMedium
+                )
+
+                Spacer(modifier = Modifier.height(12.dp))
+
+                Text(
+                    text = "• MTP file transfer\n• USB ADB\n• USB tethering\n• Other USB functions",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+
+                Spacer(modifier = Modifier.height(12.dp))
+
+                Text(
+                    text = "Active file transfers may be interrupted and could result in data corruption. Make sure no transfers are in progress.",
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.error
+                )
+
+                Spacer(modifier = Modifier.height(16.dp))
+
+                Row(
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    Checkbox(
+                        checked = dontShowAgain,
+                        onCheckedChange = { dontShowAgain = it }
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(
+                        text = "Don't show this again",
+                        style = MaterialTheme.typography.bodyMedium
+                    )
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(
+                onClick = { onConfirm(dontShowAgain) }
+            ) {
+                Text(if (isUnmount) "Unmount" else "Mount")
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) {
+                Text("Cancel")
+            }
+        }
+    )
+}

app/src/main/java/sh/sar/isodroid/ui/screens/MainScreen.kt

@@ -49,14 +49,17 @@ 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.LocalContext
 import androidx.compose.ui.unit.dp
 import kotlinx.coroutines.launch
 import sh.sar.isodroid.data.IsoFile
+import sh.sar.isodroid.data.MountOptions
 import sh.sar.isodroid.ui.components.CreateImgDialog
 import sh.sar.isodroid.ui.components.FileContextMenu
 import sh.sar.isodroid.ui.components.FileItemCard
 import sh.sar.isodroid.ui.components.MountDialog
 import sh.sar.isodroid.ui.components.StatusCard
+import sh.sar.isodroid.ui.components.UsbWarningDialog
 import sh.sar.isodroid.viewmodel.MainViewModel
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -69,12 +72,38 @@ fun MainScreen(
     val uiState by viewModel.uiState.collectAsState()
     val snackbarHostState = remember { SnackbarHostState() }
     val scope = rememberCoroutineScope()
+    val context = LocalContext.current
 
     var selectedFile by remember { mutableStateOf<IsoFile?>(null) }
     var showMountDialog by remember { mutableStateOf(false) }
     var showCreateImgDialog by remember { mutableStateOf(false) }
     var contextMenuFile by remember { mutableStateOf<IsoFile?>(null) }
 
+    // USB warning dialog state
+    var showUsbWarning by remember { mutableStateOf(false) }
+    var pendingMountPath by remember { mutableStateOf<String?>(null) }
+    var pendingMountOptions by remember { mutableStateOf<MountOptions?>(null) }
+    var isUnmountWarning by remember { mutableStateOf(false) }
+
+    val prefs = remember { context.getSharedPreferences("iso_drive_prefs", android.content.Context.MODE_PRIVATE) }
+    val skipUsbWarning = remember { mutableStateOf(prefs.getBoolean("skip_usb_warning", false)) }
+
+    fun showUsbWarningOrProceed(
+        isUnmount: Boolean,
+        mountPath: String? = null,
+        mountOptions: MountOptions? = null,
+        onProceed: () -> Unit
+    ) {
+        if (skipUsbWarning.value) {
+            onProceed()
+        } else {
+            isUnmountWarning = isUnmount
+            pendingMountPath = mountPath
+            pendingMountOptions = mountOptions
+            showUsbWarning = true
+        }
+    }
+
     val pullToRefreshState = rememberPullToRefreshState()
 
     // Handle pull-to-refresh
@@ -150,8 +179,10 @@ fun MainScreen(
             if (uiState.mountStatus.mounted) {
                 ExtendedFloatingActionButton(
                     onClick = {
-                        scope.launch {
-                            viewModel.unmount()
+                        showUsbWarningOrProceed(isUnmount = true) {
+                            scope.launch {
+                                viewModel.unmount()
+                            }
                         }
                     },
                     icon = {
@@ -295,8 +326,14 @@ fun MainScreen(
                     val filePath = file.path // Capture path before clearing state
                     showMountDialog = false
                     selectedFile = null
-                    scope.launch {
-                        viewModel.mount(filePath, options)
+                    showUsbWarningOrProceed(
+                        isUnmount = false,
+                        mountPath = filePath,
+                        mountOptions = options
+                    ) {
+                        scope.launch {
+                            viewModel.mount(filePath, options)
+                        }
                     }
                 }
             )
@@ -337,4 +374,39 @@ fun MainScreen(
             }
         )
     }
+
+    // USB warning dialog
+    if (showUsbWarning) {
+        UsbWarningDialog(
+            isUnmount = isUnmountWarning,
+            onDismiss = {
+                showUsbWarning = false
+                pendingMountPath = null
+                pendingMountOptions = null
+            },
+            onConfirm = { dontShowAgain ->
+                if (dontShowAgain) {
+                    prefs.edit().putBoolean("skip_usb_warning", true).apply()
+                    skipUsbWarning.value = true
+                }
+
+                // Capture values before clearing state
+                val isUnmount = isUnmountWarning
+                val path = pendingMountPath
+                val options = pendingMountOptions
+
+                showUsbWarning = false
+                pendingMountPath = null
+                pendingMountOptions = null
+
+                scope.launch {
+                    if (isUnmount) {
+                        viewModel.unmount()
+                    } else if (path != null && options != null) {
+                        viewModel.mount(path, options)
+                    }
+                }
+            }
+        )
+    }
 }

app/src/main/java/sh/sar/isodroid/ui/screens/SetupWizardScreen.kt

@@ -28,6 +28,7 @@ import androidx.compose.material.icons.filled.Check
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.Notifications
 import androidx.compose.material.icons.filled.Security
+import androidx.compose.material.icons.filled.Warning
 import androidx.compose.material3.Button
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
@@ -69,15 +70,18 @@ fun SetupWizardScreen(
             0 -> WelcomeStep(
                 onNext = { currentStep = 1 }
             )
-            1 -> RootAccessStep(
-                onNext = { currentStep = 2 },
-                onSkip = { currentStep = 2 }
+            1 -> DisclaimerStep(
+                onNext = { currentStep = 2 }
             )
-            2 -> NotificationStep(
+            2 -> RootAccessStep(
                 onNext = { currentStep = 3 },
                 onSkip = { currentStep = 3 }
             )
-            3 -> CompleteStep(
+            3 -> NotificationStep(
+                onNext = { currentStep = 4 },
+                onSkip = { currentStep = 4 }
+            )
+            4 -> CompleteStep(
                 onFinish = onSetupComplete
             )
         }
@@ -131,6 +135,53 @@ private fun WelcomeStep(
     }
 }
 
+@Composable
+private fun DisclaimerStep(
+    onNext: () -> Unit
+) {
+    Icon(
+        imageVector = Icons.Default.Warning,
+        contentDescription = null,
+        modifier = Modifier.size(64.dp),
+        tint = MaterialTheme.colorScheme.tertiary
+    )
+
+    Spacer(modifier = Modifier.height(24.dp))
+
+    Text(
+        text = "Before You Continue",
+        style = MaterialTheme.typography.headlineMedium,
+        fontWeight = FontWeight.Bold
+    )
+
+    Spacer(modifier = Modifier.height(16.dp))
+
+    Text(
+        text = "This app requires root access and performs system-level operations. While reasonable precautions have been taken, you are responsible for understanding what you're doing.",
+        style = MaterialTheme.typography.bodyLarge,
+        textAlign = TextAlign.Center,
+        color = MaterialTheme.colorScheme.onSurfaceVariant
+    )
+
+    Spacer(modifier = Modifier.height(12.dp))
+
+    Text(
+        text = "Keep backups of important data. This software is provided \"as is\" without warranty.",
+        style = MaterialTheme.typography.bodyMedium,
+        textAlign = TextAlign.Center,
+        color = MaterialTheme.colorScheme.onSurfaceVariant
+    )
+
+    Spacer(modifier = Modifier.height(48.dp))
+
+    Button(
+        onClick = onNext,
+        modifier = Modifier.fillMaxWidth()
+    ) {
+        Text("Continue")
+    }
+}
+
 @Composable
 private fun RootAccessStep(
     onNext: () -> Unit,