feat: add autoconnect min RSSI setting and auto-connect logic

app/src/main/java/net/duhowpi/ftmsbridge/AppSettings.kt

@@ -0,0 +1,19 @@
+package net.duhowpi.ftmsbridge
+
+import android.content.Context
+import android.content.SharedPreferences
+
+class AppSettings(context: Context) {
+    private val prefs: SharedPreferences =
+        context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE)
+
+    var autoconnectMinRssi: Int
+        get() = prefs.getInt(KEY_AUTOCONNECT_MIN_RSSI, DEFAULT_AUTOCONNECT_MIN_RSSI)
+        set(value) { prefs.edit().putInt(KEY_AUTOCONNECT_MIN_RSSI, value).apply() }
+
+    companion object {
+        private const val PREFS_NAME = "app_settings"
+        private const val KEY_AUTOCONNECT_MIN_RSSI = "autoconnect_min_rssi"
+        const val DEFAULT_AUTOCONNECT_MIN_RSSI = -40
+    }
+}

app/src/main/java/net/duhowpi/ftmsbridge/MainActivity.kt

@@ -17,6 +17,7 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.widget.Button
+import android.widget.EditText
 import android.widget.SeekBar
 import android.widget.ScrollView
 import android.widget.TextView
@@ -65,6 +66,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var hrDebugLogger: BtDebugLogger
     private lateinit var db: AppDatabase
     private lateinit var scanAdapter: ScanResultAdapter
+    private lateinit var appSettings: AppSettings
 
     private var ftmsConnectionManager: BleConnectionManager? = null
     private var hrConnectionManager: BleConnectionManager? = null
@@ -228,6 +230,7 @@ class MainActivity : AppCompatActivity() {
         hrDebugLogger = BtDebugLogger(BuildConfig.DEBUG, this)
         bleScanner = BleScanner(this)
         stateMachine = SessionStateMachine(binding, this)
+        appSettings = AppSettings(this)
 
         createDebugSampleDataIfNeeded()
 
@@ -249,6 +252,7 @@ class MainActivity : AppCompatActivity() {
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             R.id.action_history -> { startActivity(Intent(this, WorkoutHistoryActivity::class.java)); true }
+            R.id.action_settings -> { showSettingsDialog(); true }
             R.id.action_debug -> { showDebugDialog(); true }
             R.id.action_about -> { showAboutDialog(); true }
             else -> super.onOptionsItemSelected(item)
@@ -263,6 +267,31 @@ class MainActivity : AppCompatActivity() {
             .show()
     }
 
+    private fun showSettingsDialog() {
+        val input = EditText(this).apply {
+            inputType = android.text.InputType.TYPE_CLASS_NUMBER or
+                android.text.InputType.TYPE_NUMBER_FLAG_SIGNED
+            setText(appSettings.autoconnectMinRssi.toString())
+            hint = AppSettings.DEFAULT_AUTOCONNECT_MIN_RSSI.toString()
+        }
+        AlertDialog.Builder(this)
+            .setTitle(getString(R.string.settings))
+            .setMessage(getString(R.string.settings_autoconnect_min_rssi))
+            .setView(input)
+            .setPositiveButton(android.R.string.ok) { _, _ ->
+                val text = input.text.toString()
+                val value = text.toIntOrNull()
+                if (value == null || value >= 0) {
+                    Toast.makeText(this, getString(R.string.settings_invalid_rssi), Toast.LENGTH_LONG).show()
+                } else {
+                    appSettings.autoconnectMinRssi = value
+                }
+            }
+            .setNegativeButton(android.R.string.cancel, null)
+            .show()
+    }
+
+
     private fun setupScanList() {
         scanAdapter = ScanResultAdapter(
             onConnect = { info -> onDeviceConnectTapped(info) },
@@ -549,6 +578,22 @@ class MainActivity : AppCompatActivity() {
                     )
                     debugLogger.logMessage("Discovered: $name (${device.address}) FTMS=$isFtms HR=$isHr RSSI=${result.rssi}")
                 }
+
+                // Auto-connect: if this is an FTMS device with strong enough signal and
+                // no FTMS device is already connected or connecting.
+                if (isFtms && result.rssi >= appSettings.autoconnectMinRssi) {
+                    runOnUiThread {
+                        if (ftmsConnectionManager?.isConnected != true
+                            && stateMachine.state is SessionState.Idle
+                            && dummyTreadmill == null && dummyBike == null
+                        ) {
+                            val info = scanResultsMap[device.address] ?: return@runOnUiThread
+                            knownDevicesMap[device.address] = info
+                            debugLogger.logMessage("Auto-connecting to $name (${device.address}) RSSI=${result.rssi}")
+                            connectFtmsDevice(device)
+                        }
+                    }
+                }
             }
 
             override fun onScanFailed(errorCode: Int) {

app/src/main/res/menu/menu_main.xml

@@ -8,6 +8,11 @@
         android:title="@string/history"
         app:showAsAction="always" />
 
+    <item
+        android:id="@+id/action_settings"
+        android:title="@string/settings"
+        app:showAsAction="never" />
+
     <item
         android:id="@+id/action_debug"
         android:title="@string/debug_info"

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

@@ -141,4 +141,9 @@
     <!-- Recording notification -->
     <string name="recording_notification_channel">Enregistrament d\'entrenament</string>
     <string name="recording_notification_text">Enregistrament d\'entrenament en curs</string>
+
+    <!-- Settings -->
+    <string name="settings">Ajustos</string>
+    <string name="settings_autoconnect_min_rssi">RSSI mín. de connexió automàtica (dBm)</string>
+    <string name="settings_invalid_rssi">Valor de RSSI no vàlid. Introdueix un nombre negatiu (p. ex. -40).</string>
 </resources>

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

@@ -141,4 +141,9 @@
     <!-- Recording notification -->
     <string name="recording_notification_channel">Grabación de entrenamiento</string>
     <string name="recording_notification_text">Grabación de entrenamiento en curso</string>
+
+    <!-- Settings -->
+    <string name="settings">Ajustes</string>
+    <string name="settings_autoconnect_min_rssi">RSSI mín. de conexión automática (dBm)</string>
+    <string name="settings_invalid_rssi">Valor de RSSI no válido. Introduce un número negativo (p. ej. -40).</string>
 </resources>

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

@@ -110,6 +110,11 @@
     <string name="recent_bt_events">Recent BT Events</string>
     <string name="log_files">Log Files</string>
 
+    <!-- Settings -->
+    <string name="settings">Settings</string>
+    <string name="settings_autoconnect_min_rssi">Auto-connect min. RSSI (dBm)</string>
+    <string name="settings_invalid_rssi">Invalid RSSI value. Enter a negative number (e.g. -40).</string>
+
     <!-- About -->
     <string name="about">About</string>
     <string name="about_title">About FTMS Bridge</string>

fastlane/metadata/android/en-US/changelogs/5.txt

@@ -1 +1,3 @@
 - Fixed BLE disconnection when the app is in the background during long workouts
+- Added auto-connect to FTMS devices: the app automatically connects to the nearest FTMS machine when its signal strength meets the configured minimum RSSI threshold.
+- Added Settings option in the menu to configure the auto-connect minimum RSSI (default: -40 dBm).