Bump java lib versions in preparation for 1.9.2
[fw/altos] / altosdroid / app / src / main / java / org / altusmetrum / AltosDroid / AltosDroid.java
index 881682892c39132e89fbd3fb1f729a46bc03a6ec..e564e78478612742fe29eb5112bc16eb77f5c7a5 100644 (file)
@@ -36,6 +36,7 @@ import android.os.Handler;
 import android.os.Message;
 import android.os.Messenger;
 import android.os.RemoteException;
+import android.os.Parcelable;
 import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
 import android.view.*;
@@ -47,7 +48,7 @@ import android.location.LocationListener;
 import android.hardware.usb.*;
 import android.content.pm.PackageManager;
 import androidx.core.app.ActivityCompat;
-import org.altusmetrum.altoslib_13.*;
+import org.altusmetrum.altoslib_14.*;
 
 class SavedState {
        long    received_time;
@@ -72,75 +73,6 @@ class SavedState {
        }
 }
 
-class Tracker implements CharSequence, Comparable {
-       int     serial;
-       String  call;
-       double  frequency;
-
-       String  display;
-
-       public Tracker(int serial, String call, double frequency) {
-               if (call == null)
-                       call = "none";
-
-               this.serial = serial;
-               this.call = call;
-               this.frequency = frequency;
-               if (frequency == 0.0)
-                       display = "Auto";
-               else if (frequency == AltosLib.MISSING) {
-                       display = String.format("%-8.8s  %6d", call, serial);
-               } else {
-                       display = String.format("%-8.8s %7.3f %6d", call, frequency, serial);
-               }
-       }
-
-       public Tracker(AltosState s) {
-               this(s == null ? 0 : s.cal_data().serial,
-                    s == null ? null : s.cal_data().callsign,
-                    s == null ? 0.0 : s.frequency);
-       }
-
-       /* CharSequence */
-       public char charAt(int index) {
-               return display.charAt(index);
-       }
-
-       public int length() {
-               return display.length();
-       }
-
-       public CharSequence subSequence(int start, int end) throws IndexOutOfBoundsException {
-               return display.subSequence(start, end);
-       }
-
-       public String toString() {
-               return display.toString();
-       }
-
-       /* Comparable */
-       public int compareTo (Object other) {
-               Tracker o = (Tracker) other;
-               if (frequency == 0.0) {
-                       if (o.frequency == 0.0)
-                               return 0;
-                       return -1;
-               }
-               if (o.frequency == 0.0)
-                       return 1;
-
-               int     a = serial - o.serial;
-               int     b = call.compareTo(o.call);
-               int     c = (int) Math.signum(frequency - o.frequency);
-
-               if (b != 0)
-                       return b;
-               if (c != 0)
-                       return c;
-               return a;
-       }
-}
-
 public class AltosDroid extends FragmentActivity implements AltosUnitsListener, LocationListener, ActivityCompat.OnRequestPermissionsResultCallback {
 
        // Actions sent to the telemetry server at startup time
@@ -162,16 +94,22 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        public static final int REQUEST_IDLE_MODE      = 5;
        public static final int REQUEST_IGNITERS       = 6;
        public static final int REQUEST_SETUP          = 7;
+       public static final int REQUEST_SELECT_TRACKER = 8;
+       public static final int REQUEST_DELETE_TRACKER = 9;
 
        public static final String EXTRA_IDLE_MODE = "idle_mode";
        public static final String EXTRA_IDLE_RESULT = "idle_result";
+       public static final String EXTRA_FREQUENCY = "frequency";
        public static final String EXTRA_TELEMETRY_SERVICE = "telemetry_service";
+       public static final String EXTRA_TRACKERS = "trackers";
+       public static final String EXTRA_TRACKERS_TITLE = "trackers_title";
 
        // Setup result bits
        public static final int SETUP_BAUD = 1;
        public static final int SETUP_UNITS = 2;
        public static final int SETUP_MAP_SOURCE = 4;
        public static final int SETUP_MAP_TYPE = 8;
+       public static final int SETUP_FONT_SIZE = 16;
 
        public static FragmentManager   fm;
 
@@ -217,7 +155,6 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        TelemetryState  telemetry_state;
        Tracker[]       trackers;
 
-
        UsbDevice       pending_usb_device;
        boolean         start_with_usb;
 
@@ -324,7 +261,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                case TelemetryState.CONNECT_CONNECTED:
                        if (telemetry_state.config != null) {
                                String str = String.format("S/N %d %6.3f MHz%s", telemetry_state.config.serial,
-                                                          telemetry_state.frequency, idle_mode ? " (idle)" : "");
+                                                          telemetry_state.frequency, telemetry_state.idle_mode ? " (idle)" : "");
                                if (telemetry_state.telemetry_rate != AltosLib.ao_telemetry_rate_38400)
                                        str = str.concat(String.format(" %d bps",
                                                                       AltosLib.ao_telemetry_rate_values[telemetry_state.telemetry_rate]));
@@ -362,7 +299,6 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        }
 
        int     selected_serial = 0;
-       int     current_serial;
        long    switch_time;
 
        void set_switch_time() {
@@ -377,11 +313,29 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                if (new_telemetry_state != null)
                        telemetry_state = new_telemetry_state;
 
-               if (selected_serial != 0)
-                       current_serial = selected_serial;
+               if (selected_frequency != AltosLib.MISSING) {
+                       AltosState selected_state = telemetry_state.get(selected_serial);
+                       AltosState latest_state = telemetry_state.get(telemetry_state.latest_serial);
+
+                       if (selected_state != null && selected_state.frequency == selected_frequency) {
+                               selected_frequency = AltosLib.MISSING;
+                       } else if ((selected_state == null || selected_state.frequency != selected_frequency) &&
+                                  (latest_state != null && latest_state.frequency == selected_frequency))
+                       {
+                               selected_frequency = AltosLib.MISSING;
+                               selected_serial = telemetry_state.latest_serial;
+                       }
+               }
+
+               if (!telemetry_state.containsKey(selected_serial)) {
+                       selected_serial = telemetry_state.latest_serial;
+                       AltosDebug.debug("selected serial set to %d", selected_serial);
+               }
 
-               if (current_serial == 0)
-                       current_serial = telemetry_state.latest_serial;
+               int shown_serial = selected_serial;
+
+               if (telemetry_state.idle_mode)
+                       shown_serial = telemetry_state.latest_serial;
 
                if (!registered_units_listener) {
                        registered_units_listener = true;
@@ -389,7 +343,8 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                }
 
                int     num_trackers = 0;
-               for (AltosState s : telemetry_state.states.values()) {
+
+               for (AltosState s : telemetry_state.values()) {
                        num_trackers++;
                }
 
@@ -398,44 +353,17 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                int n = 0;
                trackers[n++] = new Tracker(0, "auto", 0.0);
 
-               for (AltosState s : telemetry_state.states.values())
+               for (AltosState s : telemetry_state.values())
                        trackers[n++] = new Tracker(s);
 
                Arrays.sort(trackers);
 
-               update_title(telemetry_state);
-
-               AltosState      state = null;
-               boolean         aged = true;
-
-               if (telemetry_state.states.containsKey(current_serial)) {
-                       state = telemetry_state.states.get(current_serial);
-                       int age = state_age(state.received_time);
-                       if (age < 20)
-                               aged = false;
-                       if (current_serial == selected_serial)
-                               aged = false;
-                       else if (switch_time != 0 && (switch_time - state.received_time) > 0)
-                               aged = true;
-               }
-
-               if (aged) {
-                       AltosState      newest_state = null;
-                       int             newest_age = 0;
-
-                       for (int serial : telemetry_state.states.keySet()) {
-                               AltosState      existing = telemetry_state.states.get(serial);
-                               int             existing_age = state_age(existing.received_time);
+               if (telemetry_state.frequency != AltosLib.MISSING)
+                       telem_frequency = telemetry_state.frequency;
 
-                               if (newest_state == null || existing_age < newest_age) {
-                                       newest_state = existing;
-                                       newest_age = existing_age;
-                               }
-                       }
+               update_title(telemetry_state);
 
-                       if (newest_state != null)
-                               state = newest_state;
-               }
+               AltosState      state = telemetry_state.get(shown_serial);
 
                update_ui(telemetry_state, state, telemetry_state.quiet);
 
@@ -476,6 +404,19 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        }
 
+       static String age_string(int age) {
+               String  text;
+               if (age < 60)
+                       text = String.format("%ds", age);
+               else if (age < 60 * 60)
+                       text = String.format("%dm", age / 60);
+               else if (age < 60 * 60 * 24)
+                       text = String.format("%dh", age / (60 * 60));
+               else
+                       text = String.format("%dd", age / (24 * 60 * 60));
+               return text;
+       }
+
        void update_age() {
                if (saved_state != null) {
                        int age = state_age(saved_state.received_time);
@@ -489,16 +430,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
 
                        set_screen_on(age);
 
-                       String  text;
-                       if (age < 60)
-                               text = String.format("%ds", age);
-                       else if (age < 60 * 60)
-                               text = String.format("%dm", age / 60);
-                       else if (age < 60 * 60 * 24)
-                               text = String.format("%dh", age / (60 * 60));
-                       else
-                               text = String.format("%dd", age / (24 * 60 * 60));
-                       mAgeView.setText(text);
+                       mAgeView.setText(age_string(age));
                }
        }
 
@@ -596,7 +528,6 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                for (AltosDroidTab mTab : mTabs)
                        mTab.update_ui(telem_state, state, from_receiver, location, mTab == mTabsAdapter.currentItem());
 
-               AltosDebug.debug("quiet %b\n", quiet);
                if (mAltosVoice != null && mTabsAdapter.currentItem() != null)
                        mAltosVoice.tell(telem_state, state, from_receiver, location, (AltosDroidTab) mTabsAdapter.currentItem(), quiet);
 
@@ -619,7 +550,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                }
                int deg = (int) Math.floor(p);
                double min = (p - Math.floor(p)) * 60.0;
-               return String.format("%d°%9.4f\" %s", deg, min, h);
+               return String.format("%d° %7.4f\" %s", deg, min, h);
        }
 
        static String number(String format, double value) {
@@ -642,14 +573,29 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                return tab_view;
        }
 
+       static public int[] themes = {
+               R.style.Small,
+               R.style.Medium,
+               R.style.Large,
+               R.style.Extra
+       };
+
+       static public int[] dialog_themes = {
+               R.style.Small_Dialog,
+               R.style.Medium_Dialog,
+               R.style.Large_Dialog,
+               R.style.Extra_Dialog
+       };
+
        @Override
        public void onCreate(Bundle savedInstanceState) {
+               // Initialise preferences
+               AltosDroidPreferences.init(this);
+               setTheme(themes[AltosDroidPreferences.font_size()]);
                super.onCreate(savedInstanceState);
                AltosDebug.init(this);
                AltosDebug.debug("+++ ON CREATE +++");
 
-               // Initialise preferences
-               AltosDroidPreferences.init(this);
 
                fm = getSupportFragmentManager();
 
@@ -684,7 +630,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                mStateView     = (TextView) findViewById(R.id.state_value);
                mAgeView       = (TextView) findViewById(R.id.age_value);
                mAgeNewColor   = mAgeView.getTextColors().getDefaultColor();
-               mAgeOldColor   = getResources().getColor(R.color.old_color);
+               mAgeOldColor   = getResources().getColor(R.color.old_color, getTheme());
        }
 
        private void ensureBluetooth() {
@@ -808,10 +754,11 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                update_ui(telemetry_state, state, true);
        }
 
-       static final int MY_PERMISSION_REQUEST_FINE_POSITION = 1001;
+       static final int MY_PERMISSION_REQUEST = 1001;
 
        public boolean have_location_permission = false;
-       public boolean asked_location_permission = false;
+       public boolean have_storage_permission = false;
+       public boolean asked_permission = false;
 
        AltosMapOnline map_online;
 
@@ -823,16 +770,20 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        @Override
        public void onRequestPermissionsResult(int requestCode, String[] permissions,
                                               int[] grantResults) {
-               switch (requestCode) {
-               case MY_PERMISSION_REQUEST_FINE_POSITION:
-                       if (grantResults.length > 0 &&
-                           grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                               have_location_permission = true;
-                               enable_location_updates();
-                               if (map_online != null)
-                                       map_online.position_permission();
+               if (requestCode == MY_PERMISSION_REQUEST) {
+                       for (int i = 0; i < grantResults.length; i++) {
+                               if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
+                                       if (permissions[i].equals(Manifest.permission.ACCESS_FINE_LOCATION)) {
+                                               have_location_permission = true;
+                                               enable_location_updates();
+                                               if (map_online != null)
+                                                       map_online.position_permission();
+                                       }
+                                       if (permissions[i].equals(Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
+                                               have_storage_permission = true;
+                                       }
+                               }
                        }
-                       break;
                }
        }
 
@@ -841,19 +792,30 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                super.onResume();
                AltosDebug.debug("+ ON RESUME +");
 
-               if (!asked_location_permission) {
-                       asked_location_permission = true;
+               if (!asked_permission) {
+                       asked_permission = true;
                        if (ActivityCompat.checkSelfPermission(this,
                                                              Manifest.permission.ACCESS_FINE_LOCATION)
                            == PackageManager.PERMISSION_GRANTED)
                        {
                                have_location_permission = true;
                        }
-                       else
+                       if (ActivityCompat.checkSelfPermission(this,
+                                                              Manifest.permission.WRITE_EXTERNAL_STORAGE)
+                           == PackageManager.PERMISSION_GRANTED)
+                       {
+                               have_storage_permission = true;
+                       }
+                       int count = (have_location_permission ? 0 : 1) + (have_storage_permission ? 0 : 1);
+                       if (count > 0)
                        {
-                               ActivityCompat.requestPermissions(this,
-                                                                 new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
-                                                                 MY_PERMISSION_REQUEST_FINE_POSITION);
+                               String[] permissions = new String[count];
+                               int i = 0;
+                               if (!have_location_permission)
+                                       permissions[i++] = Manifest.permission.ACCESS_FINE_LOCATION;
+                               if (!have_location_permission)
+                                       permissions[i++] = Manifest.permission.WRITE_EXTERNAL_STORAGE;
+                               ActivityCompat.requestPermissions(this, permissions, MY_PERMISSION_REQUEST);
                        }
                }
                if (have_location_permission)
@@ -889,7 +851,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        }
 
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-               AltosDebug.debug("onActivityResult " + resultCode);
+               AltosDebug.debug("onActivityResult request %d result %d", requestCode, resultCode);
                switch (requestCode) {
                case REQUEST_CONNECT_DEVICE:
                        // When DeviceListActivity returns with a device to connect to
@@ -919,12 +881,22 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                        if (resultCode == Activity.RESULT_OK)
                                note_setup_changes(data);
                        break;
+               case REQUEST_SELECT_TRACKER:
+                       if (resultCode == Activity.RESULT_OK)
+                               select_tracker(data);
+                       break;
+               case REQUEST_DELETE_TRACKER:
+                       if (resultCode == Activity.RESULT_OK)
+                               delete_track(data);
+                       break;
                }
        }
 
        private void note_setup_changes(Intent data) {
                int changes = data.getIntExtra(SetupActivity.EXTRA_SETUP_CHANGES, 0);
 
+               AltosDebug.debug("note_setup_changes changes %d\n", changes);
+
                if ((changes & SETUP_BAUD) != 0) {
                        try {
                                mService.send(Message.obtain(null, TelemetryService.MSG_SETBAUD,
@@ -942,6 +914,11 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                        /* nothing to do here */
                }
                set_switch_time();
+               if ((changes & SETUP_FONT_SIZE) != 0) {
+                       AltosDebug.debug(" ==== Recreate to switch font sizes ==== ");
+                       finish();
+                       startActivity(getIntent());
+               }
        }
 
        private void connectUsb(UsbDevice device) {
@@ -959,10 +936,12 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
        }
 
        private void bluetoothEnabled(Intent data) {
-               try {
-                       mService.send(Message.obtain(null, TelemetryService.MSG_BLUETOOTH_ENABLED, null));
-               } catch (RemoteException e) {
-                       AltosDebug.debug("send BT enabled message failed");
+               if (mService != null) {
+                       try {
+                               mService.send(Message.obtain(null, TelemetryService.MSG_BLUETOOTH_ENABLED, null));
+                       } catch (RemoteException e) {
+                               AltosDebug.debug("send BT enabled message failed");
+                       }
                }
        }
 
@@ -1029,7 +1008,12 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                return true;
        }
 
+       double telem_frequency = 434.550;
+       double selected_frequency = AltosLib.MISSING;
+
        void setFrequency(double freq) {
+               telem_frequency = freq;
+               selected_frequency = AltosLib.MISSING;
                try {
                        mService.send(Message.obtain(null, TelemetryService.MSG_SETFREQUENCY, freq));
                        set_switch_time();
@@ -1069,10 +1053,9 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                }
        }
 
-       void select_tracker(int serial) {
-               int i;
+       void select_tracker(int serial, double frequency) {
 
-               AltosDebug.debug("select tracker %d\n", serial);
+               AltosDebug.debug("select tracker %d %7.3f\n", serial, frequency);
 
                if (serial == selected_serial) {
                        AltosDebug.debug("%d already selected\n", serial);
@@ -1080,6 +1063,7 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                }
 
                if (serial != 0) {
+                       int i;
                        for (i = 0; i < trackers.length; i++)
                                if (trackers[i].serial == serial)
                                        break;
@@ -1088,35 +1072,18 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                                AltosDebug.debug("attempt to select unknown tracker %d\n", serial);
                                return;
                        }
+                       if (frequency != 0.0 && frequency != AltosLib.MISSING)
+                               setFrequency(frequency);
                }
 
-               current_serial = selected_serial = serial;
+               selected_serial = serial;
                update_state(null);
        }
 
-       void touch_trackers(Integer[] serials) {
-               AlertDialog.Builder builder_tracker = new AlertDialog.Builder(this);
-               builder_tracker.setTitle("Select Tracker");
-
-               final Tracker[] my_trackers = new Tracker[serials.length + 1];
-
-               my_trackers[0] = new Tracker(null);
-
-               for (int i = 0; i < serials.length; i++) {
-                       AltosState      s = telemetry_state.states.get(serials[i]);
-                       my_trackers[i+1] = new Tracker(s);
-               }
-               builder_tracker.setItems(my_trackers,
-                                        new DialogInterface.OnClickListener() {
-                                                public void onClick(DialogInterface dialog, int item) {
-                                                        if (item == 0)
-                                                                select_tracker(0);
-                                                        else
-                                                                select_tracker(my_trackers[item].serial);
-                                                }
-                                        });
-               AlertDialog alert_tracker = builder_tracker.create();
-               alert_tracker.show();
+       void select_tracker(Intent data) {
+               int serial = data.getIntExtra(SelectTrackerActivity.EXTRA_SERIAL_NUMBER, 0);
+               double frequency = data.getDoubleExtra(SelectTrackerActivity.EXTRA_FREQUENCY, 0.0);
+               select_tracker(serial, frequency);
        }
 
        void delete_track(int serial) {
@@ -1126,6 +1093,39 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                }
        }
 
+       void delete_track(Intent data) {
+               int serial = data.getIntExtra(SelectTrackerActivity.EXTRA_SERIAL_NUMBER, 0);
+               if (serial != 0)
+                       delete_track(serial);
+       }
+
+       void start_select_tracker(Tracker[] select_trackers, int title_id, int request) {
+               Intent intent = new Intent(this, SelectTrackerActivity.class);
+               AltosDebug.debug("put title id 0x%x %s", title_id, getResources().getString(title_id));
+               intent.putExtra(EXTRA_TRACKERS_TITLE, title_id);
+               if (select_trackers != null) {
+                       ArrayList<Tracker> tracker_array = new ArrayList<Tracker>(Arrays.asList(select_trackers));
+                       intent.putParcelableArrayListExtra(EXTRA_TRACKERS, tracker_array);
+               } else {
+                       intent.putExtra(EXTRA_TRACKERS, (Parcelable[]) null);
+               }
+               startActivityForResult(intent, request);
+       }
+
+       void start_select_tracker(Tracker[] select_trackers) {
+               start_select_tracker(select_trackers, R.string.select_tracker, REQUEST_SELECT_TRACKER);
+       }
+
+       void touch_trackers(Integer[] serials) {
+               Tracker[] my_trackers = new Tracker[serials.length];
+
+               for (int i = 0; i < serials.length; i++) {
+                       AltosState      s = telemetry_state.get(serials[i]);
+                       my_trackers[i] = new Tracker(s);
+               }
+               start_select_tracker(my_trackers);
+       }
+
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
                Intent serverIntent = null;
@@ -1159,56 +1159,28 @@ public class AltosDroid extends FragmentActivity implements AltosUnitsListener,
                                frequency_strings[i] = frequencies[i].toString();
 
                        AlertDialog.Builder builder_freq = new AlertDialog.Builder(this);
-                       builder_freq.setTitle("Pick a frequency");
+                       builder_freq.setTitle("Select Frequency");
                        builder_freq.setItems(frequency_strings,
                                         new DialogInterface.OnClickListener() {
                                                 public void onClick(DialogInterface dialog, int item) {
                                                         setFrequency(frequencies[item]);
+                                                        selected_frequency = frequencies[item].frequency;
                                                 }
                                         });
                        AlertDialog alert_freq = builder_freq.create();
                        alert_freq.show();
                        return true;
                case R.id.select_tracker:
-                       if (trackers != null) {
-                               AlertDialog.Builder builder_serial = new AlertDialog.Builder(this);
-                               builder_serial.setTitle("Select a tracker");
-                               builder_serial.setItems(trackers,
-                                                       new DialogInterface.OnClickListener() {
-                                                               public void onClick(DialogInterface dialog, int item) {
-                                                                       System.out.printf("select item %d %s\n", item, trackers[item].display);
-                                                                       if (item == 0)
-                                                                               select_tracker(0);
-                                                                       else
-                                                                               select_tracker(trackers[item].serial);
-                                                               }
-                                                       });
-                               AlertDialog alert_serial = builder_serial.create();
-                               alert_serial.show();
-
-                       }
+                       start_select_tracker(trackers);
                        return true;
                case R.id.delete_track:
-                       if (trackers != null) {
-                               AlertDialog.Builder builder_serial = new AlertDialog.Builder(this);
-                               builder_serial.setTitle("Delete a track");
-                               final Tracker[] my_trackers = new Tracker[trackers.length - 1];
-                               for (int i = 0; i < trackers.length - 1; i++)
-                                       my_trackers[i] = trackers[i+1];
-                               builder_serial.setItems(my_trackers,
-                                                       new DialogInterface.OnClickListener() {
-                                                               public void onClick(DialogInterface dialog, int item) {
-                                                                       delete_track(my_trackers[item].serial);
-                                                               }
-                                                       });
-                               AlertDialog alert_serial = builder_serial.create();
-                               alert_serial.show();
-
-                       }
+                       if (trackers != null && trackers.length > 0)
+                               start_select_tracker(trackers, R.string.delete_track, REQUEST_DELETE_TRACKER);
                        return true;
                case R.id.idle_mode:
                        serverIntent = new Intent(this, IdleModeActivity.class);
                        serverIntent.putExtra(EXTRA_IDLE_MODE, idle_mode);
+                       serverIntent.putExtra(EXTRA_FREQUENCY, telem_frequency);
                        startActivityForResult(serverIntent, REQUEST_IDLE_MODE);
                        return true;
                }