ui: Usb should use its own refresh progress bar

app-common/src/main/java/im/angry/openeuicc/ui/MainActivity.kt

@@ -50,22 +50,12 @@ open class MainActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
         }
     }
 
-    var loading: Boolean
-        get() = loadingProgress.visibility == View.VISIBLE
-        set(value) {
-            loadingProgress.visibility = if (value) {
-                View.VISIBLE
-            } else {
-                View.GONE
-            }
-        }
-
     protected lateinit var tm: TelephonyManager
 
     private val usbReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
             if (intent?.action == UsbManager.ACTION_USB_DEVICE_ATTACHED || intent?.action == UsbManager.ACTION_USB_DEVICE_DETACHED) {
-                refresh()
+                refresh(true)
             }
         }
     }
@@ -121,8 +111,8 @@ open class MainActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
         }
     }
 
-    private suspend fun init() {
-        loading = true
+    private suspend fun init(fromUsbEvent: Boolean = false) {
+        loadingProgress.visibility = View.VISIBLE
         viewPager.visibility = View.GONE
         tabs.visibility = View.GONE
 
@@ -142,7 +132,7 @@ open class MainActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
         }
 
         withContext(Dispatchers.Main) {
-            loading = false
+            loadingProgress.visibility = View.GONE
 
             knownChannels.sortedBy { it.logicalSlotId }.forEach { channel ->
                 pages.add(Page(
@@ -165,19 +155,28 @@ open class MainActivity : BaseEuiccAccessActivity(), OpenEuiccContextMarker {
                 pages.add(Page("") { appContainer.uiComponentFactory.createNoEuiccPlaceholderFragment() })
                 pagerAdapter.notifyDataSetChanged()
             }
+
+            if (fromUsbEvent && usbDevice != null) {
+                // If this refresh was triggered by a USB insertion while active, scroll to that page
+                viewPager.post {
+                    viewPager.setCurrentItem(pages.size - 1, true)
+                }
+            } else {
+                viewPager.currentItem = 0
+            }
         }
     }
 
-    private fun refresh() {
+    private fun refresh(fromUsbEvent: Boolean = false) {
         lifecycleScope.launch {
-            loading = true
+            loadingProgress.visibility = View.VISIBLE
             viewPager.visibility = View.GONE
             tabs.visibility = View.GONE
 
             pages.clear()
             pagerAdapter.notifyDataSetChanged()
 
-            init()
+            init(fromUsbEvent)
         }
     }
 }

app-common/src/main/java/im/angry/openeuicc/ui/UsbCcidReaderFragment.kt

@@ -14,6 +14,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Button
+import android.widget.ProgressBar
 import android.widget.TextView
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.commit
@@ -69,6 +70,7 @@ class UsbCcidReaderFragment : Fragment(), OpenEuiccContextMarker {
 
     private lateinit var text: TextView
     private lateinit var permissionButton: Button
+    private lateinit var loadingProgress: ProgressBar
 
     private var usbDevice: UsbDevice? = null
     private var usbChannel: EuiccChannel? = null
@@ -82,6 +84,7 @@ class UsbCcidReaderFragment : Fragment(), OpenEuiccContextMarker {
 
         text = view.requireViewById(R.id.usb_reader_text)
         permissionButton = view.requireViewById(R.id.usb_grant_permission)
+        loadingProgress = view.requireViewById(R.id.loading)
 
         permissionButton.setOnClickListener {
             usbManager.requestPermission(usbDevice, usbPendingIntent)
@@ -135,14 +138,13 @@ class UsbCcidReaderFragment : Fragment(), OpenEuiccContextMarker {
     private suspend fun tryLoadUsbChannel() {
         text.visibility = View.GONE
         permissionButton.visibility = View.GONE
-
-        (requireActivity() as MainActivity).loading = true
+        loadingProgress.visibility = View.VISIBLE
 
         val (device, channel) = withContext(Dispatchers.IO) {
             euiccChannelManager.enumerateUsbEuiccChannel()
         }
 
-        (requireActivity() as MainActivity).loading = false
+        loadingProgress.visibility = View.GONE
 
         usbDevice = device
         usbChannel = channel

app-common/src/main/res/layout/fragment_usb_ccid_reader.xml

@@ -4,6 +4,16 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+    <ProgressBar
+        android:id="@+id/loading"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:indeterminate="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
     <TextView
         android:id="@+id/usb_reader_text"
         android:layout_width="match_parent"