1. 清单文件注册权限
2.添加程序运行过程中的状态描述文本strings.xml
3.聊天界面activity_main.xml
4.蓝牙会话的服务组件ChatService
5.功能菜单devicelist.xml
6.选择好友界面的布局文件device_list.xml
7.设备界面DeviceList.class
8.蓝牙聊天界面BluetoothChat.class
9.设备名列表item的device_name.xml
10.消息列表item的message.xml
2.添加程序运行过程中的状态描述文本strings.xml
//在res/values/strings.xml里添加3.聊天界面activity_main.xmlMyBluetooth 发送 你没有链接一个设备 蓝牙不可用，离开聊天室 链接中... 连接到： 无链接 蓝牙设备搜索中... 选择一个好友链接 没有配对好友 附近没有发现好友 已配对好友 其它可连接好友 搜索好友 我的好友 设置在线 退出 开始聊天 结束聊天
4.蓝牙会话的服务组件ChatService
public class ChatService {
//本应用的主Activity组件名称
private static final String NAME = "BluetoothChat";
// UUID：通用唯一识别码,是一个128位长的数字，一般用十六进制表示
//算法的核心思想是结合机器的网卡、当地时间、一个随机数来生成
//在创建蓝牙连接
private static final UUID MY_UUID = UUID.fromString("fa87c0d0-afac-11de-8a39-0800200c9a66");
private final BluetoothAdapter mAdapter;
private final Handler mHandler;
private AcceptThread mAcceptThread;
private ConnectThread mConnectThread;
private ConnectedThread mConnectedThread;
private int mState;
public static final int STATE_NONE = 0;
public static final int STATE_LISTEN = 1;
public static final int STATE_ConNECTING = 2;
public static final int STATE_ConNECTED = 3;
//构造方法，接收UI主线程传递的对象
public ChatService(Context context, Handler handler) {
//构造方法完成蓝牙对象的创建
mAdapter = BluetoothAdapter.getDefaultAdapter();
mState = STATE_NONE;
mHandler = handler;
}
private synchronized void setState(int state) {
mState = state;
mHandler.obtainMessage(BluetoothChat.MESSAGE_STATE_CHANGE, state, -1).sendToTarget();
}
public synchronized int getState() {
return mState;
}
public synchronized void start() {
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
if (mAcceptThread == null) {
mAcceptThread = new AcceptThread();
mAcceptThread.start();
}
setState(STATE_LISTEN);
}
//取消 ConNECTING 和 ConNECTED 状态下的相关线程，然后运行新的 mConnectThread 线程
public synchronized void connect(BluetoothDevice device) {
if (mState == STATE_CONNECTING) {
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
mConnectThread = new ConnectThread(device);
mConnectThread.start();
setState(STATE_CONNECTING);
}
public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) {
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
if (mAcceptThread != null) {
mAcceptThread.cancel();
mAcceptThread = null;
}
mConnectedThread = new ConnectedThread(socket);
mConnectedThread.start();
Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_DEVICE_NAME);
Bundle bundle = new Bundle();
bundle.putString(BluetoothChat.DEVICE_NAME, device.getName());
msg.setData(bundle);
mHandler.sendMessage(msg);
setState(STATE_CONNECTED);
}
// 停止所有相关线程，设当前状态为 NONE
public synchronized void stop() {
if (mConnectThread != null) {
mConnectThread.cancel();
mConnectThread = null;
}
if (mConnectedThread != null) {
mConnectedThread.cancel();
mConnectedThread = null;
}
if (mAcceptThread != null) {
mAcceptThread.cancel();
mAcceptThread = null;
}
setState(STATE_NONE);
}
// 在 STATE_ConNECTED 状态下，调用 mConnectedThread 里的 write 方法，写入 byte
public void write(byte[] out) {
ConnectedThread r;
synchronized (this) {
if (mState != STATE_CONNECTED)
return;
r = mConnectedThread;
}
r.write(out);
}
// 连接失败的时候处理，通知 ui ，并设为 STATE_LISTEN 状态
private void connectionFailed() {
setState(STATE_LISTEN);
Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(BluetoothChat.TOAST, "链接不到设备");
msg.setData(bundle);
mHandler.sendMessage(msg);
}
// 当连接失去的时候，设为 STATE_LISTEN 状态并通知 ui
private void connectionLost() {
setState(STATE_LISTEN);
Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
Bundle bundle = new Bundle();
bundle.putString(BluetoothChat.TOAST, "设备链接中断");
msg.setData(bundle);
mHandler.sendMessage(msg);
}
// 创建监听线程，准备接受新连接。使用阻塞方式，调用 BluetoothServerSocket.accept()
private class AcceptThread extends Thread {
private final BluetoothServerSocket mmServerSocket;
public AcceptThread() {
BluetoothServerSocket tmp = null;
try {
//使用射频端口（RF comm）监听
tmp = mAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
} catch (IOException e) {
}
mmServerSocket = tmp;
}
@Override
public void run() {
setName("AcceptThread");
BluetoothSocket socket = null;
while (mState != STATE_CONNECTED) {
try {
socket = mmServerSocket.accept();
} catch (IOException e) {
break;
}
if (socket != null) {
synchronized (ChatService.this) {
switch (mState) {
case STATE_LISTEN:
case STATE_CONNECTING:
connected(socket, socket.getRemoteDevice());
break;
case STATE_NONE:
case STATE_CONNECTED:
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
}
}
public void cancel() {
try {
mmServerSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private class ConnectThread extends Thread {
private final BluetoothSocket mmSocket;
private final BluetoothDevice mmDevice;
public ConnectThread(BluetoothDevice device) {
mmDevice = device;
BluetoothSocket tmp = null;
try {
tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
e.printStackTrace();
}
mmSocket = tmp;
}
@Override
public void run() {
setName("ConnectThread");
mAdapter.cancelDiscovery();
try {
mmSocket.connect();
} catch (IOException e) {
connectionFailed();
try {
mmSocket.close();
} catch (IOException e2) {
e.printStackTrace();
}
ChatService.this.start();
return;
}
synchronized (ChatService.this) {
mConnectThread = null;
}
connected(mmSocket, mmDevice);
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private class ConnectedThread extends Thread {
private final BluetoothSocket mmSocket;
private final InputStream mmInStream;
private final OutputStream mmOutStream;
public ConnectedThread(BluetoothSocket socket) {
mmSocket = socket;
InputStream tmpIn = null;
OutputStream tmpOut = null;
try {
tmpIn = socket.getInputStream();
tmpOut = socket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
mmInStream = tmpIn;
mmOutStream = tmpOut;
}
@Override
public void run() {
byte[] buffer = new byte[1024];
int bytes;
while (true) {
try {
bytes = mmInStream.read(buffer);
mHandler.obtainMessage(BluetoothChat.MESSAGE_READ, bytes, -1, buffer).sendToTarget();
} catch (IOException e) {
connectionLost();
break;
}
}
}
public void write(byte[] buffer) {
try {
mmOutStream.write(buffer);
mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE, -1, -1, buffer).sendToTarget();
} catch (IOException e) {
e.printStackTrace();
}
}
public void cancel() {
try {
mmSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
5.功能菜单devicelist.xml
//在res/menu/optionmenu.xml里6.选择好友界面的布局文件device_list.xml
7.设备界面DeviceList.class
public class DeviceList extends AppCompatActivity {
private BluetoothAdapter mBtAdapter;
private ArrayAdapter mPairedDevicesArrayAdapter;
private ArrayAdapter mNewDevicesArrayAdapter;
public static String EXTRA_DEVICE_ADDRESS = "device_address"; //Mac地址
//定义广播接收者，用于处理扫描蓝牙设备后的结果
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
mNewDevicesArrayAdapter.add(device.getName() + "n" + device.getAddress());
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
if (mNewDevicesArrayAdapter.getCount() == 0) {
String noDevices = getResources().getText(R.string.none_found).toString();
mNewDevicesArrayAdapter.add(noDevices);
}
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.device_list);
//在被调用活动里，设置返回结果码
setResult(Activity.RESULT_CANCELED);
init(); //活动界面
}
private void init() {
Button scanButton = findViewById(R.id.button_scan);
scanButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Toast.makeText(DeviceList.this, R.string.scanning, Toast.LENGTH_LONG).show();
doDiscovery(); //搜索蓝牙设备
}
});
mPairedDevicesArrayAdapter = new ArrayAdapter(this, R.layout.device_name);
mNewDevicesArrayAdapter = new ArrayAdapter(this, R.layout.device_name);
//已配对蓝牙设备列表
ListView pairedListView = findViewById(R.id.paired_devices);
pairedListView.setAdapter(mPairedDevicesArrayAdapter);
pairedListView.setOnItemClickListener(mPaireDeviceClickListener);
//未配对蓝牙设备列表
ListView newDevicesListView = findViewById(R.id.new_devices);
newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
newDevicesListView.setOnItemClickListener(mNewDeviceClickListener);
//动态注册广播接收者
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter);
filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
registerReceiver(mReceiver, filter);
mBtAdapter = BluetoothAdapter.getDefaultAdapter();
Set pairedDevices = mBtAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
for (BluetoothDevice device : pairedDevices) {
mPairedDevicesArrayAdapter.add(device.getName() + "n" + device.getAddress());
}
} else {
String noDevices = getResources().getText(R.string.none_paired).toString();
mPairedDevicesArrayAdapter.add(noDevices);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mBtAdapter != null) {
mBtAdapter.cancelDiscovery();
}
this.unregisterReceiver(mReceiver);
}
private void doDiscovery() {
findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);
if (mBtAdapter.isDiscovering()) {
mBtAdapter.cancelDiscovery();
}
mBtAdapter.startDiscovery(); //开始搜索蓝牙设备并产生广播
//startDiscovery是一个异步方法
//找到一个设备时就发送一个BluetoothDevice.ACTION_FOUND的广播
}
private AdapterView.OnItemClickListener mPaireDeviceClickListener = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView av, View v, int arg2, long arg3) {
mBtAdapter.cancelDiscovery();
String info = ((TextView) v).getText().toString();
String address = info.substring(info.length() - 17);
Intent intent = new Intent();
intent.putExtra(EXTRA_DEVICE_ADDRESS, address); //Mac地址
setResult(Activity.RESULT_OK, intent);
finish();
}
};
private AdapterView.OnItemClickListener mNewDeviceClickListener = new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView av, View v, int arg2, long arg3) {
mBtAdapter.cancelDiscovery();
Toast.makeText(DeviceList.this, "请在蓝牙设置界面手动连接设备", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Settings.ACTION_BLUETOOTH_SETTINGS);
startActivityForResult(intent, 1);
}
};
//回调方法：进入蓝牙配对设置界面返回后执行
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
init(); //刷新好友列表
}
}
8.蓝牙聊天界面BluetoothChat.class
public class BluetoothChat extends AppCompatActivity {
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;
public static final String DEVICE_NAME = "device_name";
public static final String TOAST = "toast";
private static final int REQUEST_CONNECT_DEVICE = 1; //请求连接设备
private static final int REQUEST_ENABLE_BT = 2;
private TextView mTitle;
private ListView mConversationView;
private EditText mOutEditText;
private Button mSendButton;
private String mConnectedDeviceName = null;
private ArrayAdapter mConversationArrayAdapter;
private StringBuffer mOutStringBuffer;
private BluetoothAdapter mBluetoothAdapter = null;
//TODO
private ChatService mChatService = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//确认开发环境
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 1);
}
}
//TODO
Toolbar toolbar = findViewById(R.id.toolbar);
//创建选项菜单
toolbar.inflateMenu(R.menu.option_menu);
//选项菜单监听
toolbar.setOnMenuItemClickListener(new MyMenuItemClickListener());
mTitle = findViewById(R.id.title_left_text);
mTitle.setText(R.string.app_name);
mTitle = findViewById(R.id.title_right_text);
// 得到本地蓝牙适配器
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
Toast.makeText(this, "蓝牙不可用", Toast.LENGTH_LONG).show();
finish();
return;
}
if (!mBluetoothAdapter.isEnabled()) { //若当前设备蓝牙功能未开启
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT); //
} else {
if (mChatService == null) {
setupChat(); //创建会话
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length > 0) {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this, "未授权，蓝牙搜索功能将不可用！", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public synchronized void onResume() { //synchronized：同步方法实现排队调用
super.onResume();
if (mChatService != null) {
if (mChatService.getState() == com.example.mybluetooth.ChatService.STATE_NONE) {
mChatService.start();
}
}
}
private void setupChat() {
//初始化ListView适配器
mConversationArrayAdapter = new ArrayAdapter(this,R.layout.message);
mConversationView = findViewById(R.id.in);
mConversationView.setAdapter(mConversationArrayAdapter);
mOutEditText = findViewById(R.id.edit_text_out);
mOutEditText.setOnEditorActionListener(mWriteListener);
mSendButton = findViewById(R.id.button_send);
mSendButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
TextView view = findViewById(R.id.edit_text_out);
String message = view.getText().toString();
sendMessage(message);
}
});
//创建服务对象
mChatService = (ChatService) new com.example.mybluetooth.ChatService(this, mHandler);
mOutStringBuffer = new StringBuffer("");
}
@Override
public void onDestroy() {
super.onDestroy();
if (mChatService != null)
mChatService.stop();
}
private void ensureDiscoverable() { //修改本机蓝牙设备的可见性
//打开手机蓝牙后，能被其它蓝牙设备扫描到的时间不是永久的
if (mBluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
//设置在300秒内可见（能被扫描）
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);
Toast.makeText(this, "已经设置本机蓝牙设备的可见性，对方可搜索了。", Toast.LENGTH_SHORT).show();
}
}
private void sendMessage(String message) {
if (mChatService.getState() != com.example.mybluetooth.ChatService.STATE_CONNECTED) {
Toast.makeText(this, R.string.not_connected, Toast.LENGTH_SHORT).show();
return;
}
if (message.length() > 0) {
byte[] send = message.getBytes();
mChatService.write(send);
mOutStringBuffer.setLength(0);
mOutEditText.setText(mOutStringBuffer);
}
}
private TextView.OnEditorActionListener mWriteListener = new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) {
//软键盘里的回车也能发送消息
String message = view.getText().toString();
sendMessage(message);
}
return true;
}
};
//使用Handler对象在UI主线程与子线程之间传递消息
@SuppressLint("HandlerLeak")
private final Handler mHandler = new Handler() { //消息处理
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case com.example.mybluetooth.ChatService.STATE_CONNECTED:
mTitle.setText(R.string.title_connected_to);
mTitle.append(mConnectedDeviceName);
mConversationArrayAdapter.clear();
break;
case com.example.mybluetooth.ChatService.STATE_CONNECTING:
mTitle.setText(R.string.title_connecting);
break;
case com.example.mybluetooth.ChatService.STATE_LISTEN:
case com.example.mybluetooth.ChatService.STATE_NONE:
mTitle.setText(R.string.title_not_connected);
break;
}
break;
case MESSAGE_WRITE:
byte[] writeBuf = (byte[]) msg.obj;
String writeMessage = new String(writeBuf);
mConversationArrayAdapter.add("我: " + writeMessage);
break;
case MESSAGE_READ:
byte[] readBuf = (byte[]) msg.obj;
String readMessage = new String(readBuf, 0, msg.arg1);
mConversationArrayAdapter.add(mConnectedDeviceName + ": "
+ readMessage);
break;
case MESSAGE_DEVICE_NAME:
mConnectedDeviceName = msg.getData().getString(DEVICE_NAME);
Toast.makeText(getApplicationContext(), "链接到 " + mConnectedDeviceName, Toast.LENGTH_SHORT).show();
break;
case MESSAGE_TOAST:
Toast.makeText(getApplicationContext(),
msg.getData().getString(TOAST), Toast.LENGTH_SHORT).show();
break;
}
}
};
//返回进入好友列表 *** 作后的数回调方法
public void onActivityResult(int requestCode, int resultCode, Intent data) {
//TODO
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_CONNECT_DEVICE:
if (resultCode == Activity.RESULT_OK) {
String address = data.getExtras().getString(DeviceList.EXTRA_DEVICE_ADDRESS);
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
mChatService.connect(device);
} else if (resultCode == Activity.RESULT_CANCELED) {
Toast.makeText(this, "未选择任何好友！", Toast.LENGTH_SHORT).show();
}
break;
case REQUEST_ENABLE_BT:
if (resultCode == Activity.RESULT_OK) {
setupChat();
} else {
Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();
finish();
}
}
}
//内部类，选项菜单的单击事件处理
private class MyMenuItemClickListener implements Toolbar.OnMenuItemClickListener {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.scan:
System.out.println("--*****------******-------******--");
//启动DeviceList这个Activity
Intent serverIntent = new Intent(BluetoothChat.this, DeviceList.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
return true;
case R.id.discoverable:
ensureDiscoverable();
return true;
case R.id.back:
finish();
System.exit(0);
return true;
}
return false;
}
}
}
9.设备名列表item的device_name.xml
10.消息列表item的message.xml
结果截图 源码
点击获取源码
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