Add input field for destination path.

app/src/main/java/de/ccc/events/badge/card10/filetransfer/FileTransfer.kt

@@ -34,7 +34,8 @@ private const val TAG = "FileTransfer"
 class FileTransfer(
     private val service: LowEffortService,
     private val reader: ChunkedReader,
-    private var listener: FileTransferListener
+    private var listener: FileTransferListener,
+    private val destinationPath: String
 ) : OnPacketReceivedListener {
 
     private var currentState = TransferState.IDLE
@@ -100,7 +101,7 @@ class FileTransfer(
         service.sendPacket(
             Packet(
                 PacketType.START,
-                "/foo.py".toByteArray(Charset.forName("ASCII"))
+                destinationPath.toByteArray(Charset.forName("ASCII"))
             )
         )
         currentState = TransferState.START_SENT

app/src/main/java/de/ccc/events/badge/card10/filetransfer/FileTransferFragment.kt

@@ -30,6 +30,7 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.Button
+import android.widget.EditText
 import android.widget.ProgressBar
 import android.widget.TextView
 import androidx.annotation.UiThread
@@ -53,6 +54,7 @@ class FileTransferFragment : Fragment(), GattListener, FileTransferListener{
     private lateinit var tvSelected: TextView
     private lateinit var tvStatus: TextView
     private lateinit var progressBar: ProgressBar
+    private lateinit var inputDestination: EditText
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         return inflater.inflate(R.layout.file_transfer_fragment, container, false)
@@ -62,6 +64,7 @@ class FileTransferFragment : Fragment(), GattListener, FileTransferListener{
         tvSelected = view.findViewById(R.id.label_selected)
         tvStatus = view.findViewById(R.id.label_status)
         progressBar = view.findViewById(R.id.progress)
+        inputDestination = view.findViewById(R.id.input_destination)
 
         buttonPickFile = view.findViewById(R.id.button_pick_file)
         buttonPickFile.setOnClickListener {
@@ -95,7 +98,7 @@ class FileTransferFragment : Fragment(), GattListener, FileTransferListener{
             val reader = ChunkedReader(ctx, uri, ConnectionService.mtu)
             val service = ConnectionService.leService ?: throw IllegalStateException()
 
-            transfer = FileTransfer(service, reader, this)
+            transfer = FileTransfer(service, reader, this, inputDestination.text.toString())
         } catch (e: Exception) {
             Log.e(TAG, "Failed to initialize transfer")
             return

app/src/main/res/layout/file_transfer_fragment.xml

@@ -25,6 +25,23 @@
             app:layout_constraintTop_toBottomOf="@id/button_pick_file"
             android:text="@string/file_transfer_label_no_file_selected"/>
 
+    <EditText android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              android:id="@+id/input_destination"
+              app:layout_constraintLeft_toLeftOf="parent"
+              app:layout_constraintRight_toRightOf="parent"
+              app:layout_constraintTop_toBottomOf="@id/label_selected"
+              android:importantForAutofill="no"
+              android:hint="@string/file_transfer_hint_destination"/>
+
+    <TextView android:layout_width="wrap_content"
+              android:layout_height="wrap_content"
+              android:id="@+id/label_destination_help"
+              android:text="@string/file_transfer_label_destination_help"
+              app:layout_constraintLeft_toLeftOf="parent"
+              app:layout_constraintRight_toRightOf="parent"
+              app:layout_constraintTop_toBottomOf="@id/input_destination"/>
+
     <Button
             android:id="@+id/button_start_stop_transfer"
             android:layout_width="wrap_content"
@@ -32,8 +49,8 @@
             android:layout_marginTop="@dimen/send_label_margin"
             app:layout_constraintLeft_toLeftOf="parent"
             app:layout_constraintRight_toRightOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/label_selected"
-            android:text="@string/file_transfer_button_start_transfer" />
+            app:layout_constraintTop_toBottomOf="@id/label_destination_help"
+            android:text="@string/file_transfer_button_start_transfer"/>
 
     <TextView
             android:id="@+id/label_status"

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

@@ -16,6 +16,8 @@
     <string name="file_transfer_button_stop_transfer">Cancel</string>
     <string name="file_transfer_label_no_file_selected">No file selected</string>
     <string name="file_transfer_label_selected_file">Selected file:</string>
+    <string name="file_transfer_hint_destination">Destination path</string>
+    <string name="file_transfer_label_destination_help">(e.g. /test.py)</string>
 
     <string name="loading_dialog_loading">Loading</string>
     <string name="dialog_action_ok">OK</string>