Java tutorial
/* * Copyright 2012-2013 Mike Beattie <mike@ethernal.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ package org.altusmetrum.AltosDroid; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.Timer; import java.util.TimerTask; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.Intent; import android.content.Context; import android.content.ComponentName; import android.content.ServiceConnection; import android.content.DialogInterface; import android.os.IBinder; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.support.v4.app.FragmentActivity; import android.util.DisplayMetrics; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.Window; import android.widget.TabHost; import android.widget.TextView; import android.widget.Toast; import android.app.AlertDialog; import android.location.Location; import org.altusmetrum.altoslib_4.*; public class AltosDroid extends FragmentActivity { // Debugging private static final String TAG = "AltosDroid"; private static final boolean D = true; // Message types received by our Handler public static final int MSG_STATE_CHANGE = 1; public static final int MSG_TELEMETRY = 2; public static final int MSG_UPDATE_AGE = 3; public static final int MSG_LOCATION = 4; public static final int MSG_CRC_ERROR = 5; // Intent request codes private static final int REQUEST_CONNECT_DEVICE = 1; private static final int REQUEST_ENABLE_BT = 2; // Layout Views private TextView mTitle; // Flight state values private TextView mCallsignView; private TextView mRSSIView; private TextView mSerialView; private TextView mFlightView; private TextView mStateView; private TextView mAgeView; // field to display the version at the bottom of the screen private TextView mVersion; // Tabs TabHost mTabHost; AltosViewPager mViewPager; TabsAdapter mTabsAdapter; ArrayList<AltosDroidTab> mTabs = new ArrayList<AltosDroidTab>(); int tabHeight; // Timer and Saved flight state for Age calculation private Timer timer = new Timer(); AltosState saved_state; Location saved_location; // Service private boolean mIsBound = false; private Messenger mService = null; final Messenger mMessenger = new Messenger(new IncomingHandler(this)); // Preferences private AltosDroidPreferences prefs = null; // TeleBT Config data private AltosConfigData mConfigData = null; // Local Bluetooth adapter private BluetoothAdapter mBluetoothAdapter = null; // Text to Speech private AltosVoice mAltosVoice = null; // The Handler that gets information back from the Telemetry Service static class IncomingHandler extends Handler { private final WeakReference<AltosDroid> mAltosDroid; IncomingHandler(AltosDroid ad) { mAltosDroid = new WeakReference<AltosDroid>(ad); } @Override public void handleMessage(Message msg) { AltosDroid ad = mAltosDroid.get(); switch (msg.what) { case MSG_STATE_CHANGE: if (D) Log.d(TAG, "MSG_STATE_CHANGE: " + msg.arg1); switch (msg.arg1) { case TelemetryService.STATE_CONNECTED: ad.mConfigData = (AltosConfigData) msg.obj; String str = String.format(" %s S/N: %d", ad.mConfigData.product, ad.mConfigData.serial); ad.mTitle.setText(R.string.title_connected_to); ad.mTitle.append(str); Toast.makeText(ad.getApplicationContext(), "Connected to " + str, Toast.LENGTH_SHORT).show(); break; case TelemetryService.STATE_CONNECTING: ad.mTitle.setText(R.string.title_connecting); break; case TelemetryService.STATE_READY: case TelemetryService.STATE_NONE: ad.mConfigData = null; ad.mTitle.setText(R.string.title_not_connected); break; } break; case MSG_TELEMETRY: ad.update_ui((AltosState) msg.obj); break; case MSG_LOCATION: ad.set_location((Location) msg.obj); break; case MSG_CRC_ERROR: case MSG_UPDATE_AGE: if (ad.saved_state != null) { ad.mAgeView.setText(String.format("%d", (System.currentTimeMillis() - ad.saved_state.received_time + 500) / 1000)); } break; } } }; private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { mService = new Messenger(service); try { Message msg = Message.obtain(null, TelemetryService.MSG_REGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // In this case the service has crashed before we could even do anything with it } } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been unexpectedly disconnected - process crashed. mService = null; } }; void doBindService() { bindService(new Intent(this, TelemetryService.class), mConnection, Context.BIND_AUTO_CREATE); mIsBound = true; } void doUnbindService() { if (mIsBound) { // If we have received the service, and hence registered with it, then now is the time to unregister. if (mService != null) { try { Message msg = Message.obtain(null, TelemetryService.MSG_UNREGISTER_CLIENT); msg.replyTo = mMessenger; mService.send(msg); } catch (RemoteException e) { // There is nothing special we need to do if the service has crashed. } } // Detach our existing connection. unbindService(mConnection); mIsBound = false; } } public void registerTab(AltosDroidTab mTab) { mTabs.add(mTab); } public void unregisterTab(AltosDroidTab mTab) { mTabs.remove(mTab); } void set_location(Location location) { saved_location = location; update_ui(saved_state); } void update_ui(AltosState state) { if (state != null && saved_state != null) { if (saved_state.state != state.state) { String currentTab = mTabHost.getCurrentTabTag(); switch (state.state) { case AltosLib.ao_flight_boost: if (currentTab.equals("pad")) mTabHost.setCurrentTabByTag("ascent"); break; case AltosLib.ao_flight_drogue: if (currentTab.equals("ascent")) mTabHost.setCurrentTabByTag("descent"); break; case AltosLib.ao_flight_landed: if (currentTab.equals("descent")) mTabHost.setCurrentTabByTag("landed"); break; } } } saved_state = state; AltosGreatCircle from_receiver = null; if (state != null && saved_location != null && state.gps != null && state.gps.locked) { double altitude = 0; if (saved_location.hasAltitude()) altitude = saved_location.getAltitude(); from_receiver = new AltosGreatCircle(saved_location.getLatitude(), saved_location.getLongitude(), altitude, state.gps.lat, state.gps.lon, state.gps.alt); } if (state != null) { mCallsignView.setText(state.callsign); mSerialView.setText(String.format("%d", state.serial)); mFlightView.setText(String.format("%d", state.flight)); mStateView.setText(state.state_name()); mRSSIView.setText(String.format("%d", state.rssi)); } for (AltosDroidTab mTab : mTabs) mTab.update_ui(state, from_receiver, saved_location); if (state != null) mAltosVoice.tell(state); } private void onTimerTick() { try { mMessenger.send(Message.obtain(null, MSG_UPDATE_AGE)); } catch (RemoteException e) { } } static String pos(double p, String pos, String neg) { String h = pos; if (p == AltosLib.MISSING) return ""; if (p < 0) { h = neg; p = -p; } int deg = (int) Math.floor(p); double min = (p - Math.floor(p)) * 60.0; return String.format("%d%9.4f\" %s", deg, min, h); } static String number(String format, double value) { if (value == AltosLib.MISSING) return ""; return String.format(format, value); } static String integer(String format, int value) { if (value == AltosLib.MISSING) return ""; return String.format(format, value); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (D) Log.e(TAG, "+++ ON CREATE +++"); // Get local Bluetooth adapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); // If the adapter is null, then Bluetooth is not supported if (mBluetoothAdapter == null) { Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show(); finish(); return; } // Initialise preferences prefs = new AltosDroidPreferences(this); AltosPreferences.init(prefs); // Set up the window layout requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.altosdroid); getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title); // Create the Tabs and ViewPager mTabHost = (TabHost) findViewById(android.R.id.tabhost); mTabHost.setup(); mViewPager = (AltosViewPager) findViewById(R.id.pager); mViewPager.setOffscreenPageLimit(4); mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager); mTabsAdapter.addTab(mTabHost.newTabSpec("pad").setIndicator("Pad"), TabPad.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec("ascent").setIndicator("Ascent"), TabAscent.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec("descent").setIndicator("Descent"), TabDescent.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec("landed").setIndicator("Landed"), TabLanded.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec("map").setIndicator("Map"), TabMap.class, null); // Scale the size of the Tab bar for different screen densities // This probably won't be needed when we start supporting ICS+ tabs. DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics); int density = metrics.densityDpi; if (density == DisplayMetrics.DENSITY_XHIGH) tabHeight = 65; else if (density == DisplayMetrics.DENSITY_HIGH) tabHeight = 45; else if (density == DisplayMetrics.DENSITY_MEDIUM) tabHeight = 35; else if (density == DisplayMetrics.DENSITY_LOW) tabHeight = 25; else tabHeight = 65; for (int i = 0; i < 5; i++) mTabHost.getTabWidget().getChildAt(i).getLayoutParams().height = tabHeight; // Set up the custom title mTitle = (TextView) findViewById(R.id.title_left_text); mTitle.setText(R.string.app_name); mTitle = (TextView) findViewById(R.id.title_right_text); // Display the Version mVersion = (TextView) findViewById(R.id.version); mVersion.setText("Version: " + BuildInfo.version + " Built: " + BuildInfo.builddate + " " + BuildInfo.buildtime + " " + BuildInfo.buildtz + " (" + BuildInfo.branch + "-" + BuildInfo.commitnum + "-" + BuildInfo.commithash + ")"); mCallsignView = (TextView) findViewById(R.id.callsign_value); mRSSIView = (TextView) findViewById(R.id.rssi_value); mSerialView = (TextView) findViewById(R.id.serial_value); mFlightView = (TextView) findViewById(R.id.flight_value); mStateView = (TextView) findViewById(R.id.state_value); mAgeView = (TextView) findViewById(R.id.age_value); timer.scheduleAtFixedRate(new TimerTask() { public void run() { onTimerTick(); } }, 1000L, 100L); mAltosVoice = new AltosVoice(this); } @Override public void onStart() { super.onStart(); if (D) Log.e(TAG, "++ ON START ++"); if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); } // Start Telemetry Service startService(new Intent(AltosDroid.this, TelemetryService.class)); doBindService(); } @Override public synchronized void onResume() { super.onResume(); if (D) Log.e(TAG, "+ ON RESUME +"); } @Override public synchronized void onPause() { super.onPause(); if (D) Log.e(TAG, "- ON PAUSE -"); } @Override public void onStop() { super.onStop(); if (D) Log.e(TAG, "-- ON STOP --"); doUnbindService(); } @Override public void onDestroy() { super.onDestroy(); if (D) Log.e(TAG, "--- ON DESTROY ---"); if (mAltosVoice != null) mAltosVoice.stop(); } public void onActivityResult(int requestCode, int resultCode, Intent data) { if (D) Log.d(TAG, "onActivityResult " + resultCode); switch (requestCode) { case REQUEST_CONNECT_DEVICE: // When DeviceListActivity returns with a device to connect to if (resultCode == Activity.RESULT_OK) { connectDevice(data); } break; case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // Bluetooth is now enabled, so set up a chat session //setupChat(); } else { // User did not enable Bluetooth or an error occured Log.e(TAG, "BT not enabled"); stopService(new Intent(AltosDroid.this, TelemetryService.class)); Toast.makeText(this, R.string.bt_not_enabled, Toast.LENGTH_SHORT).show(); finish(); } break; } } private void connectDevice(Intent data) { // Get the device MAC address String address = data.getExtras().getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS); // Get the BLuetoothDevice object BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); // Attempt to connect to the device try { if (D) Log.d(TAG, "Connecting to " + device.getName()); mService.send(Message.obtain(null, TelemetryService.MSG_CONNECT, device)); } catch (RemoteException e) { } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.option_menu, menu); return true; } void setFrequency(double freq) { try { mService.send(Message.obtain(null, TelemetryService.MSG_SETFREQUENCY, freq)); } catch (RemoteException e) { } } void setFrequency(String freq) { try { setFrequency(Double.parseDouble(freq.substring(11, 17))); } catch (NumberFormatException e) { } } @Override public boolean onOptionsItemSelected(MenuItem item) { Intent serverIntent = null; switch (item.getItemId()) { case R.id.connect_scan: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE); return true; case R.id.select_freq: // Set the TBT radio frequency final String[] frequencies = { "Channel 0 (434.550MHz)", "Channel 1 (434.650MHz)", "Channel 2 (434.750MHz)", "Channel 3 (434.850MHz)", "Channel 4 (434.950MHz)", "Channel 5 (435.050MHz)", "Channel 6 (435.150MHz)", "Channel 7 (435.250MHz)", "Channel 8 (435.350MHz)", "Channel 9 (435.450MHz)" }; AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Pick a frequency"); builder.setItems(frequencies, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { setFrequency(frequencies[item]); } }); AlertDialog alert = builder.create(); alert.show(); return true; } return false; } }