Java tutorial
/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.authorwjf.bounce; import java.io.IOException; import java.util.Random; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import android.app.ActionBar; import android.app.Activity; import android.app.Service; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.content.Intent; import android.os.AsyncTask; import android.os.Binder; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.inputmethod.EditorInfo; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; /** * This is the main Activity that displays the current chat session. */ public class BluetoothChat extends Service { // Debugging private static final String TAG = "BluetoothChat"; private static final boolean D = true; // Message types sent from the BluetoothChatService Handler public static final int MESSAGE_STATE_CHANGE = 1; public static final int MESSAGE_READ = 2; public static final int MESSAGE_WRITE = 3; public static final int MESSAGE_DEVICE_NAME = 4; public static final int MESSAGE_TOAST = 5; // Key names received from the BluetoothChatService Handler public static final String DEVICE_NAME = "device_name"; public static final String TOAST = "toast"; // Intent request codes private static final int REQUEST_CONNECT_DEVICE_SECURE = 1; private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2; private static final int REQUEST_ENABLE_BT = 3; // Layout Views private ListView mConversationView; private EditText mOutEditText; private Button mSendButton; // Name of the connected device private String mConnectedDeviceName = null; // Array adapter for the conversation thread private ArrayAdapter<String> mConversationArrayAdapter; // String buffer for outgoing messages private StringBuffer mOutStringBuffer; // Local Bluetooth adapter private BluetoothAdapter mBluetoothAdapter = null; // Member object for the chat services private BluetoothChatService mChatService = null; private final IBinder mBinder = new LocalBinder(); public class LocalBinder extends Binder { BluetoothChat getService() { return BluetoothChat.this; } } @Override public void onCreate() { super.onCreate(); // Get local Bluetooth adapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); setupChat(); // If the adapter is null, then Bluetooth is not supported /*if (mBluetoothAdapter == null) { Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show(); return; }*/ } private Runnable f = new Runnable() { // Fetch the scores ... //AsyncTask.execute(new Runnable() { public void run() { fetchScoreboardFunc(); } }; private void fetchScoreboardFunc() { // Fetch the scores ... AsyncTask.execute(new Runnable() { public void run() { try { // Instantiate the scoreboardEntriesList //ArrayList<ScoreboardEntry> scoreboardEntriesList = new ArrayList<ScoreboardEntry>(); // Get the attributes used for the HTTP GET //String currentUserFBID = application.getCurrentFBUser().getId(); //String currentUserAccessToken = Session.getActiveSession().getAccessToken(); Random rgen = new Random(); double currentScore = rgen.nextDouble(); String currentUserFBID = Main.fbid; // Execute the HTTP Get to our server for the scores of the user's friends HttpClient client = new DefaultHttpClient(); /* Update this */ //String getURL = "http://www.friendsmash.com/scores?fbid=" + currentUserFBID + "&access_token=" + currentUserAccessToken; String getURL = "http://omnidrive.herokuapp.com/data?fbid=" + currentUserFBID + "¤tScore=" + currentScore; //String getURL = "http://www.omnidrive.io/api/?fbid=" + currentUserFBID + "¤tScore=" + mpg; HttpGet get = new HttpGet(getURL); HttpResponse responseGet = client.execute(get); } catch (Exception e) { Log.e(BluetoothChat.TAG, e.toString()); } } }); } public void onStart() { // If BT is not on, request that it be enabled. // setupChat() will then be called during onActivityResult if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); // Otherwise, setup the chat session } else { if (mChatService == null) setupChat(); } } public int onStartCommand(Intent intent, int flags, int startId) { return START_STICKY; } private void setupChat() { // Initialize the array adapter for the conversation thread mConversationArrayAdapter = new ArrayAdapter<String>(this, R.layout.message); // Initialize the BluetoothChatService to perform bluetooth connections mChatService = new BluetoothChatService(this, mHandler); // Initialize the buffer for outgoing messages mOutStringBuffer = new StringBuffer(""); BluetoothAdapter myAdapter = BluetoothAdapter.getDefaultAdapter(); BluetoothDevice remoteDevice = myAdapter.getRemoteDevice(Main.macAddress); try { BluetoothSocket btSocket = remoteDevice .createRfcommSocketToServiceRecord(BluetoothChatService.MY_UUID_INSECURE); btSocket.connect(); } catch (IOException exc) { System.out.println("Error connecting"); stopSelf(); } new AutomaticQueryThread(mSendButton, this).start(); } @Override public void onDestroy() { super.onDestroy(); // Stop the Bluetooth chat services if (mChatService != null) mChatService.stop(); } private void ensureDiscoverable() { if (mBluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300); startActivity(discoverableIntent); } } public void hackMessage(String str) { sendMessage(str); } /** * Sends a message. * @param message A string of text to send. */ private void sendMessage(String message) { if (System.currentTimeMillis() - BluetoothChatService.last_data_collection > 2000) { BluetoothChatService.end_game = true; try { HttpClient client = new DefaultHttpClient(); String getURL = "http://www.omnidrive.io/api/?fbid=" + Main.fbid + "&mpgs=" + BluetoothChatService.allMPG.toString().replaceAll("\\s", ""); getURL = getURL.replace("[", ""); getURL = getURL.replace("]", ""); HttpGet get = new HttpGet(getURL); HttpResponse responseGet = client.execute(get); } catch (Exception e) { Log.e(TAG, "FAILURE"); } } // Check that we're actually connected before trying anything if (mChatService.getState() != BluetoothChatService.STATE_CONNECTED) { Toast.makeText(this, R.string.not_connected, Toast.LENGTH_SHORT).show(); return; } /* * MPG = (14.7 * 6.17 * 4.54 * VSS * 0.621371) / (3600 * MAF / 100) = 710.7 * VSS / MAF MPG - miles per gallon 14.7 grams of air to 1 gram of gasoline - ideal air/fuel ratio 6.17 pounds per gallon - density of gasoline 4.54 grams per pound - conversion VSS - vehicle speed in kilometers per hour 0.621371 miles per hour/kilometers per hour - conversion 3600 seconds per hour - conversion MAF - mass air flow rate in 100 grams per second 100 - to correct MAF to give grams per second */ // Check that there's actually something to send if (message != null && message.length() > 0) { // PARSER String lmsg = message.toLowerCase(); if (lmsg.equals("rpm")) { message = "010C"; } else if (lmsg.equals("speed")) { message = "010D"; } else if (lmsg.equals("baro")) { message = "0133"; } else if (lmsg.equals("ambient")) { message = "0146"; } else if (lmsg.equals("throttle")) { message = "0149"; } else if (lmsg.equals("maf")) { message = "0110"; } } // Get the message bytes and tell the BluetoothChatService to write byte[] send = message.getBytes(); mChatService.write(send); // Reset out string buffer to zero and clear the edit text field mOutStringBuffer.setLength(0); //mOutEditText.setText(mOutStringBuffer); } // The action listener for the EditText widget, to listen for the return key private TextView.OnEditorActionListener mWriteListener = new TextView.OnEditorActionListener() { public boolean onEditorAction(TextView view, int actionId, KeyEvent event) { // If the action is a key-up event on the return key, send the message if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) { String message = view.getText().toString(); sendMessage(message); } return true; } }; // The Handler that gets information back from the BluetoothChatService private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_STATE_CHANGE: switch (msg.arg1) { case BluetoothChatService.STATE_CONNECTED: mConversationArrayAdapter.clear(); break; case BluetoothChatService.STATE_CONNECTING: break; case BluetoothChatService.STATE_LISTEN: case BluetoothChatService.STATE_NONE: break; } break; case MESSAGE_WRITE: byte[] writeBuf = (byte[]) msg.obj; // construct a string from the buffer String writeMessage = new String(writeBuf); mConversationArrayAdapter.add("Me: " + writeMessage); break; case MESSAGE_READ: byte[] readBuf = (byte[]) msg.obj; // construct a string from the valid bytes in the buffer String readMessage = new String(readBuf, 0, msg.arg1); mConversationArrayAdapter.add(mConnectedDeviceName + ": " + readMessage); break; case MESSAGE_DEVICE_NAME: // save the connected device's name mConnectedDeviceName = msg.getData().getString(DEVICE_NAME); Toast.makeText(getApplicationContext(), "Connected to " + mConnectedDeviceName, Toast.LENGTH_SHORT) .show(); break; case MESSAGE_TOAST: Toast.makeText(getApplicationContext(), msg.getData().getString(TOAST), Toast.LENGTH_SHORT).show(); break; } } }; public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_CONNECT_DEVICE_SECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, true); } break; case REQUEST_CONNECT_DEVICE_INSECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, false); } 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 occurred Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show(); } } } private void connectDevice(Intent data, boolean secure) { // 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 mChatService.connect(device, secure); } public boolean onOptionsItemSelected(MenuItem item) { Intent serverIntent = null; switch (item.getItemId()) { case R.id.secure_connect_scan: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, DeviceListActivity.class); return true; case R.id.insecure_connect_scan: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, DeviceListActivity.class); return true; case R.id.discoverable: // Ensure this device is discoverable by others ensureDiscoverable(); return true; } return false; } @Override public IBinder onBind(Intent arg0) { return mBinder; } }