git.gag.com Git - fw/altos/blob - altosdroid/src/org/altusmetrum/AltosDroid/AltosDroid.java

   1 /*
   2  * Copyright © 2012-2013 Mike Beattie <mike@ethernal.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package org.altusmetrum.AltosDroid;
  19
  20 import java.lang.ref.WeakReference;
  21 import java.util.ArrayList;
  22 import java.util.Timer;
  23 import java.util.TimerTask;
  24
  25 import android.app.Activity;
  26 import android.bluetooth.BluetoothAdapter;
  27 import android.bluetooth.BluetoothDevice;
  28 import android.content.Intent;
  29 import android.content.Context;
  30 import android.content.ComponentName;
  31 import android.content.ServiceConnection;
  32 import android.content.DialogInterface;
  33 import android.os.IBinder;
  34 import android.os.Bundle;
  35 import android.os.Handler;
  36 import android.os.Message;
  37 import android.os.Messenger;
  38 import android.os.RemoteException;
  39 import android.support.v4.app.FragmentActivity;
  40 import android.support.v4.app.FragmentManager;
  41 import android.util.DisplayMetrics;
  42 import android.util.Log;
  43 import android.view.Menu;
  44 import android.view.MenuInflater;
  45 import android.view.MenuItem;
  46 import android.view.Window;
  47 import android.view.View;
  48 import android.widget.TabHost;
  49 import android.widget.TextView;
  50 import android.widget.RelativeLayout;
  51 import android.widget.Toast;
  52 import android.app.AlertDialog;
  53 import android.location.Location;
  54
  55 import org.altusmetrum.altoslib_5.*;
  56
  57 public class AltosDroid extends FragmentActivity implements AltosUnitsListener {
  58         // Debugging
  59         static final String TAG = "AltosDroid";
  60         static final boolean D = true;
  61
  62         // Message types received by our Handler
  63
  64         public static final int MSG_STATE           = 1;
  65         public static final int MSG_UPDATE_AGE      = 2;
  66
  67         // Intent request codes
  68         public static final int REQUEST_CONNECT_DEVICE = 1;
  69         public static final int REQUEST_ENABLE_BT      = 2;
  70
  71         public static FragmentManager   fm;
  72
  73         private BluetoothAdapter mBluetoothAdapter = null;
  74
  75         // Layout Views
  76         private TextView mTitle;
  77
  78         // Flight state values
  79         private TextView mCallsignView;
  80         private TextView mRSSIView;
  81         private TextView mSerialView;
  82         private TextView mFlightView;
  83         private RelativeLayout mStateLayout;
  84         private TextView mStateView;
  85         private TextView mAgeView;
  86
  87         // field to display the version at the bottom of the screen
  88         private TextView mVersion;
  89
  90         private double frequency;
  91         private int telemetry_rate;
  92
  93         // Tabs
  94         TabHost         mTabHost;
  95         AltosViewPager  mViewPager;
  96         TabsAdapter     mTabsAdapter;
  97         ArrayList<AltosDroidTab> mTabs = new ArrayList<AltosDroidTab>();
  98         int             tabHeight;
  99
 100         // Timer and Saved flight state for Age calculation
 101         private Timer timer;
 102         AltosState saved_state;
 103
 104         // Service
 105         private boolean mIsBound   = false;
 106         private Messenger mService = null;
 107         final Messenger mMessenger = new Messenger(new IncomingHandler(this));
 108
 109         // Text to Speech
 110         private AltosVoice mAltosVoice = null;
 111
 112         // The Handler that gets information back from the Telemetry Service
 113         static class IncomingHandler extends Handler {
 114                 private final WeakReference<AltosDroid> mAltosDroid;
 115                 IncomingHandler(AltosDroid ad) { mAltosDroid = new WeakReference<AltosDroid>(ad); }
 116
 117                 @Override
 118                 public void handleMessage(Message msg) {
 119                         AltosDroid ad = mAltosDroid.get();
 120
 121                         switch (msg.what) {
 122                         case MSG_STATE:
 123                                 if(D) Log.d(TAG, "MSG_STATE");
 124                                 TelemetryState telemetry_state = (TelemetryState) msg.obj;
 125                                 if (telemetry_state == null) {
 126                                         Log.d(TAG, "telemetry_state null!");
 127                                         return;
 128                                 }
 129
 130                                 ad.update_state(telemetry_state);
 131                                 break;
 132                         case MSG_UPDATE_AGE:
 133                                 if(D) Log.d(TAG, "MSG_UPDATE_AGE");
 134                                 ad.update_age();
 135                                 break;
 136                         }
 137                 }
 138         };
 139
 140
 141         private ServiceConnection mConnection = new ServiceConnection() {
 142                 public void onServiceConnected(ComponentName className, IBinder service) {
 143                         mService = new Messenger(service);
 144                         try {
 145                                 Message msg = Message.obtain(null, TelemetryService.MSG_REGISTER_CLIENT);
 146                                 msg.replyTo = mMessenger;
 147                                 mService.send(msg);
 148                         } catch (RemoteException e) {
 149                                 // In this case the service has crashed before we could even do anything with it
 150                         }
 151                 }
 152
 153                 public void onServiceDisconnected(ComponentName className) {
 154                         // This is called when the connection with the service has been unexpectedly disconnected - process crashed.
 155                         mService = null;
 156                 }
 157         };
 158
 159         void doBindService() {
 160                 bindService(new Intent(this, TelemetryService.class), mConnection, Context.BIND_AUTO_CREATE);
 161                 mIsBound = true;
 162         }
 163
 164         void doUnbindService() {
 165                 if (mIsBound) {
 166                         // If we have received the service, and hence registered with it, then now is the time to unregister.
 167                         if (mService != null) {
 168                                 try {
 169                                         Message msg = Message.obtain(null, TelemetryService.MSG_UNREGISTER_CLIENT);
 170                                         msg.replyTo = mMessenger;
 171                                         mService.send(msg);
 172                                 } catch (RemoteException e) {
 173                                         // There is nothing special we need to do if the service has crashed.
 174                                 }
 175                         }
 176                         // Detach our existing connection.
 177                         unbindService(mConnection);
 178                         mIsBound = false;
 179                 }
 180         }
 181
 182         public void registerTab(AltosDroidTab mTab) {
 183                 mTabs.add(mTab);
 184         }
 185
 186         public void unregisterTab(AltosDroidTab mTab) {
 187                 mTabs.remove(mTab);
 188         }
 189
 190         public void units_changed(boolean imperial_units) {
 191                 for (AltosDroidTab mTab : mTabs)
 192                         mTab.units_changed(imperial_units);
 193         }
 194
 195         void update_title(TelemetryState telemetry_state) {
 196                 switch (telemetry_state.connect) {
 197                 case TelemetryState.CONNECT_CONNECTED:
 198                         if (telemetry_state.config != null) {
 199                                 String str = String.format("S/N %d %6.3f MHz", telemetry_state.config.serial,
 200                                                            telemetry_state.frequency);
 201                                 if (telemetry_state.telemetry_rate != AltosLib.ao_telemetry_rate_38400)
 202                                         str = str.concat(String.format(" %d bps",
 203                                                                        AltosLib.ao_telemetry_rate_values[telemetry_state.telemetry_rate]));
 204                                 mTitle.setText(str);
 205                         } else {
 206                                 mTitle.setText(R.string.title_connected_to);
 207                         }
 208                         break;
 209                 case TelemetryState.CONNECT_CONNECTING:
 210                         mTitle.setText(R.string.title_connecting);
 211                         break;
 212                 case TelemetryState.CONNECT_READY:
 213                 case TelemetryState.CONNECT_NONE:
 214                         mTitle.setText(R.string.title_not_connected);
 215                         break;
 216                 }
 217         }
 218
 219         void start_timer() {
 220                 if (timer == null) {
 221                         timer = new Timer();
 222                         timer.scheduleAtFixedRate(new TimerTask(){ public void run() {onTimerTick();}}, 1000L, 1000L);
 223                 }
 224         }
 225
 226         void stop_timer() {
 227                 if (timer != null) {
 228                         timer.cancel();
 229                         timer.purge();
 230                         timer = null;
 231                 }
 232         }
 233
 234         boolean registered_units_listener;
 235
 236         void update_state(TelemetryState telemetry_state) {
 237
 238                 if (!registered_units_listener) {
 239                         registered_units_listener = true;
 240                         AltosPreferences.register_units_listener(this);
 241                 }
 242
 243                 update_title(telemetry_state);
 244                 update_ui(telemetry_state.state, telemetry_state.location);
 245                 if (telemetry_state.connect == TelemetryState.CONNECT_CONNECTED)
 246                         start_timer();
 247                 else
 248                         stop_timer();
 249         }
 250
 251         boolean same_string(String a, String b) {
 252                 if (a == null) {
 253                         if (b == null)
 254                                 return true;
 255                         return false;
 256                 } else {
 257                         if (b == null)
 258                                 return false;
 259                         return a.equals(b);
 260                 }
 261         }
 262
 263         void update_age() {
 264                 if (saved_state != null)
 265                         mAgeView.setText(String.format("%d", (System.currentTimeMillis() - saved_state.received_time + 500) / 1000));
 266         }
 267
 268         void update_ui(AltosState state, Location location) {
 269
 270                 Log.d(TAG, "update_ui");
 271
 272                 int prev_state = AltosLib.ao_flight_invalid;
 273
 274                 AltosGreatCircle from_receiver = null;
 275
 276                 if (saved_state != null)
 277                         prev_state = saved_state.state;
 278
 279                 if (state != null) {
 280                         Log.d(TAG, String.format("prev state %d new state  %d\n", prev_state, state.state));
 281                         if (state.state == AltosLib.ao_flight_stateless) {
 282                                 boolean prev_locked = false;
 283                                 boolean locked = false;
 284
 285                                 if(state.gps != null)
 286                                         locked = state.gps.locked;
 287                                 if (saved_state != null && saved_state.gps != null)
 288                                         prev_locked = saved_state.gps.locked;
 289                                 if (prev_locked != locked) {
 290                                         String currentTab = mTabHost.getCurrentTabTag();
 291                                         if (locked) {
 292                                                 if (currentTab.equals("pad")) mTabHost.setCurrentTabByTag("descent");
 293                                         } else {
 294                                                 if (currentTab.equals("descent")) mTabHost.setCurrentTabByTag("pad");
 295                                         }
 296                                 }
 297                         } else {
 298                                 if (prev_state != state.state) {
 299                                         String currentTab = mTabHost.getCurrentTabTag();
 300                                         Log.d(TAG, "switch state");
 301                                         switch (state.state) {
 302                                         case AltosLib.ao_flight_boost:
 303                                                 if (currentTab.equals("pad")) mTabHost.setCurrentTabByTag("ascent");
 304                                                 break;
 305                                         case AltosLib.ao_flight_drogue:
 306                                                 if (currentTab.equals("ascent")) mTabHost.setCurrentTabByTag("descent");
 307                                                 break;
 308                                         case AltosLib.ao_flight_landed:
 309                                                 if (currentTab.equals("descent")) mTabHost.setCurrentTabByTag("landed");
 310                                                 break;
 311                                         case AltosLib.ao_flight_stateless:
 312                                                 if (currentTab.equals("pad")) mTabHost.setCurrentTabByTag("descent");
 313                                                 break;
 314                                         }
 315                                 }
 316                         }
 317
 318                         if (location != null && state.gps != null && state.gps.locked) {
 319                                 double altitude = 0;
 320                                 if (location.hasAltitude())
 321                                         altitude = location.getAltitude();
 322                                 from_receiver = new AltosGreatCircle(location.getLatitude(),
 323                                                                      location.getLongitude(),
 324                                                                      altitude,
 325                                                                      state.gps.lat,
 326                                                                      state.gps.lon,
 327                                                                      state.gps.alt);
 328                         }
 329
 330                         if (saved_state == null || !same_string(saved_state.callsign, state.callsign)) {
 331                                 Log.d(TAG, "update callsign");
 332                                 mCallsignView.setText(state.callsign);
 333                         }
 334                         if (saved_state == null || state.serial != saved_state.serial) {
 335                                 Log.d(TAG, "update serial");
 336                                 mSerialView.setText(String.format("%d", state.serial));
 337                         }
 338                         if (saved_state == null || state.flight != saved_state.flight) {
 339                                 Log.d(TAG, "update flight");
 340                                 mFlightView.setText(String.format("%d", state.flight));
 341                         }
 342                         if (saved_state == null || state.state != saved_state.state) {
 343                                 Log.d(TAG, "update state");
 344                                 if (state.state == AltosLib.ao_flight_stateless) {
 345                                         mStateLayout.setVisibility(View.GONE);
 346                                 } else {
 347                                         mStateView.setText(state.state_name());
 348                                         mStateLayout.setVisibility(View.VISIBLE);
 349                                 }
 350                         }
 351                         if (saved_state == null || state.rssi != saved_state.rssi) {
 352                                 Log.d(TAG, "update rssi");
 353                                 mRSSIView.setText(String.format("%d", state.rssi));
 354                         }
 355                 }
 356
 357                 for (AltosDroidTab mTab : mTabs)
 358                         mTab.update_ui(state, from_receiver, location, mTab == mTabsAdapter.currentItem());
 359
 360                 if (state != null)
 361                         mAltosVoice.tell(state, from_receiver);
 362
 363                 saved_state = state;
 364         }
 365
 366         private void onTimerTick() {
 367                 try {
 368                         mMessenger.send(Message.obtain(null, MSG_UPDATE_AGE));
 369                 } catch (RemoteException e) {
 370                 }
 371         }
 372
 373         static String pos(double p, String pos, String neg) {
 374                 String  h = pos;
 375                 if (p == AltosLib.MISSING)
 376                         return "";
 377                 if (p < 0) {
 378                         h = neg;
 379                         p = -p;
 380                 }
 381                 int deg = (int) Math.floor(p);
 382                 double min = (p - Math.floor(p)) * 60.0;
 383                 return String.format("%d°%9.4f\" %s", deg, min, h);
 384         }
 385
 386         static String number(String format, double value) {
 387                 if (value == AltosLib.MISSING)
 388                         return "";
 389                 return String.format(format, value);
 390         }
 391
 392         static String integer(String format, int value) {
 393                 if (value == AltosLib.MISSING)
 394                         return "";
 395                 return String.format(format, value);
 396         }
 397
 398         @Override
 399         public void onCreate(Bundle savedInstanceState) {
 400                 super.onCreate(savedInstanceState);
 401                 if(D) Log.e(TAG, "+++ ON CREATE +++");
 402
 403                 // Get local Bluetooth adapter
 404                 mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
 405
 406                 // If the adapter is null, then Bluetooth is not supported
 407                 if (mBluetoothAdapter == null) {
 408                         Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
 409                         finish();
 410                 }
 411
 412                 fm = getSupportFragmentManager();
 413
 414                 // Set up the window layout
 415                 requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
 416                 setContentView(R.layout.altosdroid);
 417                 getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);
 418
 419                 // Create the Tabs and ViewPager
 420                 mTabHost = (TabHost)findViewById(android.R.id.tabhost);
 421                 mTabHost.setup();
 422
 423                 mViewPager = (AltosViewPager)findViewById(R.id.pager);
 424                 mViewPager.setOffscreenPageLimit(4);
 425
 426                 mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager);
 427
 428                 mTabsAdapter.addTab(mTabHost.newTabSpec("pad").setIndicator("Pad"), TabPad.class, null);
 429                 mTabsAdapter.addTab(mTabHost.newTabSpec("ascent").setIndicator("Ascent"), TabAscent.class, null);
 430                 mTabsAdapter.addTab(mTabHost.newTabSpec("descent").setIndicator("Descent"), TabDescent.class, null);
 431                 mTabsAdapter.addTab(mTabHost.newTabSpec("landed").setIndicator("Landed"), TabLanded.class, null);
 432                 mTabsAdapter.addTab(mTabHost.newTabSpec("map").setIndicator("Map"), TabMap.class, null);
 433
 434
 435                 // Scale the size of the Tab bar for different screen densities
 436                 // This probably won't be needed when we start supporting ICS+ tabs.
 437                 DisplayMetrics metrics = new DisplayMetrics();
 438                 getWindowManager().getDefaultDisplay().getMetrics(metrics);
 439                 int density = metrics.densityDpi;
 440
 441                 if (density==DisplayMetrics.DENSITY_XHIGH)
 442                         tabHeight = 65;
 443                 else if (density==DisplayMetrics.DENSITY_HIGH)
 444                         tabHeight = 45;
 445                 else if (density==DisplayMetrics.DENSITY_MEDIUM)
 446                         tabHeight = 35;
 447                 else if (density==DisplayMetrics.DENSITY_LOW)
 448                         tabHeight = 25;
 449                 else
 450                         tabHeight = 65;
 451
 452                 for (int i = 0; i < 5; i++)
 453                         mTabHost.getTabWidget().getChildAt(i).getLayoutParams().height = tabHeight;
 454
 455                 // Set up the custom title
 456                 mTitle = (TextView) findViewById(R.id.title_left_text);
 457                 mTitle.setText(R.string.app_name);
 458                 mTitle = (TextView) findViewById(R.id.title_right_text);
 459
 460                 // Display the Version
 461                 mVersion = (TextView) findViewById(R.id.version);
 462                 mVersion.setText("Version: " + BuildInfo.version +
 463                                  "  Built: " + BuildInfo.builddate + " " + BuildInfo.buildtime + " " + BuildInfo.buildtz +
 464                                  "  (" + BuildInfo.branch + "-" + BuildInfo.commitnum + "-" + BuildInfo.commithash + ")");
 465
 466                 mCallsignView  = (TextView) findViewById(R.id.callsign_value);
 467                 mRSSIView      = (TextView) findViewById(R.id.rssi_value);
 468                 mSerialView    = (TextView) findViewById(R.id.serial_value);
 469                 mFlightView    = (TextView) findViewById(R.id.flight_value);
 470                 mStateLayout   = (RelativeLayout) findViewById(R.id.state_container);
 471                 mStateView     = (TextView) findViewById(R.id.state_value);
 472                 mAgeView       = (TextView) findViewById(R.id.age_value);
 473
 474                 mAltosVoice = new AltosVoice(this);
 475         }
 476
 477         @Override
 478         public void onStart() {
 479                 super.onStart();
 480                 if(D) Log.e(TAG, "++ ON START ++");
 481
 482                 // Start Telemetry Service
 483                 startService(new Intent(AltosDroid.this, TelemetryService.class));
 484
 485                 if (!mBluetoothAdapter.isEnabled()) {
 486                         Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
 487                         startActivityForResult(enableIntent, AltosDroid.REQUEST_ENABLE_BT);
 488                 }
 489
 490                 doBindService();
 491
 492         }
 493
 494         @Override
 495         public synchronized void onResume() {
 496                 super.onResume();
 497                 if(D) Log.e(TAG, "+ ON RESUME +");
 498         }
 499
 500         @Override
 501         public synchronized void onPause() {
 502                 super.onPause();
 503                 if(D) Log.e(TAG, "- ON PAUSE -");
 504         }
 505
 506         @Override
 507         public void onStop() {
 508                 super.onStop();
 509                 if(D) Log.e(TAG, "-- ON STOP --");
 510
 511                 doUnbindService();
 512         }
 513
 514         @Override
 515         public void onDestroy() {
 516                 super.onDestroy();
 517                 if(D) Log.e(TAG, "--- ON DESTROY ---");
 518
 519                 if (mAltosVoice != null) mAltosVoice.stop();
 520                 stop_timer();
 521         }
 522
 523         public void onActivityResult(int requestCode, int resultCode, Intent data) {
 524                 if(D) Log.d(TAG, "onActivityResult " + resultCode);
 525                 switch (requestCode) {
 526                 case REQUEST_CONNECT_DEVICE:
 527                         // When DeviceListActivity returns with a device to connect to
 528                         if (resultCode == Activity.RESULT_OK) {
 529                                 connectDevice(data);
 530                         }
 531                         break;
 532                 case REQUEST_ENABLE_BT:
 533                         // When the request to enable Bluetooth returns
 534                         if (resultCode == Activity.RESULT_OK) {
 535                                 // Bluetooth is now enabled, so set up a chat session
 536                                 //setupChat();
 537                         } else {
 538                                 // User did not enable Bluetooth or an error occured
 539                                 Log.e(TAG, "BT not enabled");
 540                                 stopService(new Intent(AltosDroid.this, TelemetryService.class));
 541                                 Toast.makeText(this, R.string.bt_not_enabled, Toast.LENGTH_SHORT).show();
 542                                 finish();
 543                         }
 544                         break;
 545                 }
 546         }
 547
 548         private void connectDevice(String address) {
 549                 // Attempt to connect to the device
 550                 try {
 551                         if (D) Log.d(TAG, "Connecting to " + address);
 552                         mService.send(Message.obtain(null, TelemetryService.MSG_CONNECT, address));
 553                 } catch (RemoteException e) {
 554                 }
 555         }
 556
 557         private void connectDevice(Intent data) {
 558                 // Get the device MAC address
 559                 String address = data.getExtras().getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
 560                 connectDevice(address);
 561         }
 562
 563         @Override
 564         public boolean onCreateOptionsMenu(Menu menu) {
 565                 MenuInflater inflater = getMenuInflater();
 566                 inflater.inflate(R.menu.option_menu, menu);
 567                 return true;
 568         }
 569
 570         void setFrequency(double freq) {
 571                 try {
 572                         mService.send(Message.obtain(null, TelemetryService.MSG_SETFREQUENCY, freq));
 573                 } catch (RemoteException e) {
 574                 }
 575         }
 576
 577         void setFrequency(String freq) {
 578                 try {
 579                         setFrequency (Double.parseDouble(freq.substring(11, 17)));
 580                 } catch (NumberFormatException e) {
 581                 }
 582         }
 583
 584         void setBaud(int baud) {
 585                 try {
 586                         mService.send(Message.obtain(null, TelemetryService.MSG_SETBAUD, baud));
 587                 } catch (RemoteException e) {
 588                 }
 589         }
 590
 591         void setBaud(String baud) {
 592                 try {
 593                         int     value = Integer.parseInt(baud);
 594                         int     rate = AltosLib.ao_telemetry_rate_38400;
 595                         switch (value) {
 596                         case 2400:
 597                                 rate = AltosLib.ao_telemetry_rate_2400;
 598                                 break;
 599                         case 9600:
 600                                 rate = AltosLib.ao_telemetry_rate_9600;
 601                                 break;
 602                         case 38400:
 603                                 rate = AltosLib.ao_telemetry_rate_38400;
 604                                 break;
 605                         }
 606                         setBaud(rate);
 607                 } catch (NumberFormatException e) {
 608                 }
 609         }
 610
 611         @Override
 612         public boolean onOptionsItemSelected(MenuItem item) {
 613                 Intent serverIntent = null;
 614                 switch (item.getItemId()) {
 615                 case R.id.connect_scan:
 616                         // Launch the DeviceListActivity to see devices and do scan
 617                         serverIntent = new Intent(this, DeviceListActivity.class);
 618                         startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
 619                         return true;
 620                 case R.id.quit:
 621                         Log.d(TAG, "R.id.quit");
 622                         stopService(new Intent(AltosDroid.this, TelemetryService.class));
 623                         finish();
 624                         return true;
 625                 case R.id.select_freq:
 626                         // Set the TBT radio frequency
 627
 628                         final String[] frequencies = {
 629                                 "Channel 0 (434.550MHz)",
 630                                 "Channel 1 (434.650MHz)",
 631                                 "Channel 2 (434.750MHz)",
 632                                 "Channel 3 (434.850MHz)",
 633                                 "Channel 4 (434.950MHz)",
 634                                 "Channel 5 (435.050MHz)",
 635                                 "Channel 6 (435.150MHz)",
 636                                 "Channel 7 (435.250MHz)",
 637                                 "Channel 8 (435.350MHz)",
 638                                 "Channel 9 (435.450MHz)"
 639                         };
 640
 641                         AlertDialog.Builder builder_freq = new AlertDialog.Builder(this);
 642                         builder_freq.setTitle("Pick a frequency");
 643                         builder_freq.setItems(frequencies,
 644                                          new DialogInterface.OnClickListener() {
 645                                                  public void onClick(DialogInterface dialog, int item) {
 646                                                          setFrequency(frequencies[item]);
 647                                                  }
 648                                          });
 649                         AlertDialog alert_freq = builder_freq.create();
 650                         alert_freq.show();
 651                         return true;
 652                 case R.id.select_rate:
 653                         // Set the TBT baud rate
 654
 655                         final String[] rates = {
 656                                 "38400",
 657                                 "9600",
 658                                 "2400",
 659                         };
 660
 661                         AlertDialog.Builder builder_rate = new AlertDialog.Builder(this);
 662                         builder_rate.setTitle("Pick a baud rate");
 663                         builder_rate.setItems(rates,
 664                                          new DialogInterface.OnClickListener() {
 665                                                  public void onClick(DialogInterface dialog, int item) {
 666                                                          setBaud(rates[item]);
 667                                                  }
 668                                          });
 669                         AlertDialog alert_rate = builder_rate.create();
 670                         alert_rate.show();
 671                         return true;
 672                 case R.id.change_units:
 673                         boolean imperial = AltosPreferences.imperial_units();
 674                         AltosPreferences.set_imperial_units(!imperial);
 675                         return true;
 676                 }
 677                 return false;
 678         }
 679
 680 }