/*
* Copyright (C) 2014 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.myapplication.bluetoothconnection;
import android.annotation.TargetApi;
import android.app.ProgressDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URLDecoder;
import java.nio.CharBuffer;
import java.util.UUID;
/**
* This class does all the work for setting up and managing Bluetooth
* connections with other devices. It has a thread that listens for
* incoming connections, a thread for connecting with a device, and a
* thread for performing data transmissions when connected.
*/
public class BluetoothChatService {
// Debugging
private static final String TAG = "BluetoothChatService";
// Name for the SDP record when creating server socket
private static final String NAME_SECURE = "BluetoothChatSecure";
private static final String NAME_INSECURE = "BluetoothChatInsecure";
// Unique UUID for this application
private static final UUID MY_UUID_SECURE =
UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
private static final UUID MY_UUID_INSECURE =
UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
// Member fields
private final BluetoothAdapter mAdapter;
private final Handler mHandler;
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
private int mState;
// Constants that indicate the current connection state
public static final int STATE_NONE = 0; // we're doing nothing
//public static final int STATE_LISTEN = 1; // now listening for incoming connections
public static final int STATE_CONNECTING = 2; // now initiating an outgoing connection
public static final int STATE_CONNECTED = 3; // now connected to a remote device
private ProgressDialog progressDialog;
Context context;
/**
* Constructor. Prepares a new BluetoothChat session.
*
* @param context The UI Activity Context
* @param handler A Handler to send messages back to the UI Activity
*/
public BluetoothChatService(Context context, Handler handler) {
this.context = context;
mAdapter = BluetoothAdapter.getDefaultAdapter();
mState = STATE_NONE;//藍牙狀態(tài)
mHandler = handler;//用來跟新ui
progressDialog = new ProgressDialog(context);
setDialog();
}
private void setDialog() {
progressDialog.setTitle("連接藍牙");
progressDialog.setMessage("連接藍牙中....");
progressDialog.setCancelable(true);
}
/**
* Set the current state of the chat connection
*
* @param state An integer defining the current connection state
*/
private synchronized void setState(int state) {
/*Log.d(TAG, "setState() " + mState + " -> " + state);*/
mState = state;
// Give the new state to the Handler so the UI Activity can update
mHandler.obtainMessage(Constants.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
/**
* Return the current connection state.
*/
public synchronized int getState() {
return mState;
}
/**
* Start the ConnectThread to initiate a connection to a remote device.
*
* @param device The BluetoothDevice to connect
* @param secure Socket Security type - Secure (true) , Insecure (false)
*/
public synchronized void connect(BluetoothDevice device, boolean secure) {
// Cancel any thread attempting to make a connection
if (mState == STATE_CONNECTING) {
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
}
// Cancel any thread currently running a connection
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
// Start the thread to connect with the given device
mConnectThread = new ConnectThread(device, secure);
mConnectThread.start();
setState(STATE_CONNECTING);
progressDialog.show();
}
/**
* Start the ConnectedThread to begin managing a Bluetooth connection
*
* @param socket The BluetoothSocket on which the connection was made
* @param device The BluetoothDevice that has been connected
*/
public synchronized void connected(BluetoothSocket socket, BluetoothDevice
device, final String socketType) {
Log.d(TAG, "connected, Socket Type:" + socketType);
progressDialog.dismiss();//連接成功取消進度框
// Cancel the thread that completed the connection
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
// Cancel any thread currently running a connection
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
setState(STATE_CONNECTED);
// Start the thread to manage the connection and perform transmissions
mConnectedThread = new ConnectedThread(socket, socketType);
mConnectedThread.start();
// 發(fā)送已經(jīng)連接成功的設(shè)備名字返回ui線程，即通過ui一開始構(gòu)造器傳進來的mHandler來處理
Message msg = mHandler.obtainMessage(Constants.MESSAGE_DEVICE_NAME);
Bundle bundle = new Bundle();
bundle.putString(Constants.DEVICE_NAME, device.getName());
msg.setData(bundle);
mHandler.sendMessage(msg);
}
/**
* Stop all threads
*/
public synchronized void stop() {
Log.d(TAG, "stop");
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
setState(STATE_NONE);
}
/**
* Write to the ConnectedThread in an unsynchronized manner
*
* @param out The bytes to write
* @see ConnectedThread#(byte[])
*/
public void write(byte[] out) {
// Create temporary object
ConnectedThread r;
// Synchronize a copy of the ConnectedThread
synchronized (this) {
if (mState != STATE_CONNECTED) return;
r = mConnectedThread;
}
// Perform the write unsynchronized
r.write(out);
}
/**
* Indicate that the connection attempt failed and notify the UI Activity.
*/
private void connectionFailed() {
// Send a failure message back to the Activity
Message msg = mHandler.obtainMessage(Constants.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(Constants.TOAST, "Unable to connect device");
msg.setData(bundle);
mHandler.sendMessage(msg);
// Start the service over to restart listening mode
//BluetoothChatService.this.start();
}
/**
* Indicate that the connection was lost and notify the UI Activity.
*/
private void connectionLost() {
// Send a failure message back to the Activity
Message msg = mHandler.obtainMessage(Constants.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(Constants.TOAST, "Device connection was lost");
msg.setData(bundle);
mHandler.sendMessage(msg);
// Start the service over to restart listening mode
//BluetoothChatService.this.start();
}
/**
* This thread runs while attempting to make an outgoing connection
* with a device. It runs straight through; the connection either
* succeeds or fails.
*/
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
private String mSocketType;
@TargetApi(Build.VERSION_CODES.GINGERBREAD_MR1)
public ConnectThread(BluetoothDevice device, boolean secure) {
mmDevice = device;//連接必須要有device這個對象
BluetoothSocket tmp = null;
mSocketType = secure ? "Secure" : "Insecure";
// 拿到socket,
//這里uuid有分安全模式和非安全模式之分
try {
if (secure) {
tmp = device.createRfcommSocketToServiceRecord(
MY_UUID_SECURE);
Log.d(TAG, "get temp over");
} else {
tmp = device.createInsecureRfcommSocketToServiceRecord(
MY_UUID_INSECURE);
Log.d(TAG, "get temp over");
}
} catch (IOException e) {
Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);
}
mmSocket = tmp;
}
public void run() {
Log.i(TAG, "BEGIN mConnectThread SocketType:" + mSocketType);
setName("ConnectThread" + mSocketType);
// Always cancel discovery because it will slow down a connection
mAdapter.cancelDiscovery();
// Make a connection to the BluetoothSocket
try {
// This is a blocking call and will only return on a
// successful connection or an exception
mmSocket.connect();
} catch (IOException e) {
// Close the socket
try {
mmSocket.close();
} catch (IOException e2) {
Log.e(TAG, "unable to close() " + mSocketType +
" socket during connection failure", e2);
}
connectionFailed();
return;
}
// Reset the ConnectThread because we're done
synchronized (BluetoothChatService.this) {
mConnectThread = null;
}
// Start the connected thread
connected(mmSocket, mmDevice, mSocketType);
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect " + mSocketType + " socket failed", e);
}
}
}
/**
* This thread runs during a connection with a remote device.
* It handles all incoming and outgoing transmissions.
*/
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket, String socketType) {
Log.d(TAG, "create ConnectedThread: " + socketType);
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
// Get the BluetoothSocket input and output streams
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
Log.e(TAG, "temp sockets not created", e);
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
public void run() {
Log.d(TAG, "BEGIN mConnectedThread");
byte[] buffer = new byte[1024];
StringBuilder sb = new StringBuilder();
int bytes;
String b = "", str= "";
Log.d(TAG, "" + mState);
if (mmSocket == null) {
Log.d("----------------------", "沒有連接");
return;
}
// Keep listening to the InputStream while connected
while (mState == STATE_CONNECTED) {
try {
BufferedInputStream reader = new BufferedInputStream(mmInStream);
bytes = reader.read(buffer);
String tempStr = new String(buffer);//temp write to log
tempStr.replace("\r\n", "***");
/*mHandler.obtainMessage(Constants.MESSAGE_READ, bytes, 0, new String(buffer))
.sendToTarget();*/
// sb.append(new String(buffer, 0, bytes));
for (int i = 0; i < bytes; i++) {
b = Integer.toHexString(buffer & 0x000000FF).toUpperCase();
str = Integer.toHexString((buffer & 0x000000ff) | 0xffffff00)
.substring(6).toUpperCase();
if (b.length() < 2)
sb.append("0");
sb.append(b);
}
Log.d("message",str);
/*
if (sb.indexOf("Success") >= 0 || sb.indexOf("Error") >= 0) {*/
mHandler.obtainMessage(Constants.MESSAGE_READ, bytes - 1, -1, sb.toString())
.sendToTarget();
//sb.delete(0, sb.length());
// }
buffer = new byte[1024];
/* if(sb.charAt(sb.length()-1)=='$'){
sb.deleteCharAt(sb.length()-1);
Toast.makeText(MainActivity.myContext,sb.toString()+"》MESSAGE_READ",1000).show();
mHandler.obtainMessage(Constants.MESSAGE_READ, bytes-1, -1,sb.toString())
.sendToTarget();
sb.delete(0,sb.length());
}*/
// Send the obtained bytes to the UI Activity
} catch (IOException e) {
Log.e(TAG, "disconnected", e);
connectionLost();
// Start the service over to restart listening mode
//BluetoothChatService.this.start();
break;
}
try {
Thread.sleep(50);// 延遲
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/**
* Write to the connected OutStream.
*
* @param buffer The bytes to write
*/
public void write(byte[] buffer) {
if (mmSocket == null) {
Log.d("----------------------", "沒有連接");
return;
}
try {
/* BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(mmOutStream));
bw.write(buffer);
*/
byte[] buffers ={0};
mmOutStream.write(buffers);
if (mmSocket != null) {
mmOutStream.flush();
}
// Share the sent message back to the UI Activity
mHandler.obtainMessage(Constants.MESSAGE_WRITE, -1, -1, buffer)
.sendToTarget();
} catch (IOException e) {
Log.e(TAG, "Exception during write", e);
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
Log.e(TAG, "close() of connect socket failed", e);
}
}
}
}
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