Android 蓝牙音箱开发
Posted LiuJun2Son
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项目下载地址github：
1.打开蓝牙：
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
/**如果本地蓝牙没有开启，则开启*/
if (!mBluetoothAdapter.isEnabled())
// 我们通过startActivityForResult()方法发起的Intent将会在onActivityResult()回调方法中获取用户的选择，比如用户单击了Yes开启，
// 那么将会收到RESULT_OK的结果，
// 如果RESULT_CANCELED则代表用户不愿意开启蓝牙
Intent mIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(mIntent, ENABLE_BLUE);
else
Toast.makeText(this, "蓝牙已开启", Toast.LENGTH_SHORT).show();
监听打开的结果：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == ENABLE_BLUE)
if (resultCode == RESULT_OK)
Toast.makeText(this, "蓝牙开启成功", Toast.LENGTH_SHORT).show();
getBondedDevices();
else if (resultCode == RESULT_CANCELED)
Toast.makeText(this, "蓝牙开始失败", Toast.LENGTH_SHORT).show();
else
2.关闭蓝牙:
/**关闭蓝牙*/
if (mBluetoothAdapter.isEnabled())
mBluetoothAdapter.disable();
3.设计蓝牙为可见:
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 180);//180可见时间
startActivity(intent);4.收索蓝牙:
注册广播监听搜索的结果：
/**注册搜索蓝牙receiver*/
mFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
mFilter.addAction(BluetoothDevice.ACTION_FOUND);
mFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
registerReceiver(mReceiver, mFilter);开始的搜索：
// 如果正在搜索，就先取消搜索
if (mBluetoothAdapter.isDiscovering())
mBluetoothAdapter.cancelDiscovery();
// 开始搜索蓝牙设备,搜索到的蓝牙设备通过广播返回
mBluetoothAdapter.startDiscovery();监听搜索的结果：
private BroadcastReceiver mReceiver = new BroadcastReceiver()
@Override
public void onReceive(Context context, Intent intent)
String action = intent.getAction();
/** 搜索到的蓝牙设备*/
if (action.equals(BluetoothDevice.ACTION_FOUND))
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// 搜索到的不是已经配对的蓝牙设备
if (device.getBondState() != BluetoothDevice.BOND_BONDED)
BlueDevice blueDevice = new BlueDevice();
blueDevice.setName(device.getName());
blueDevice.setAddress(device.getAddress());
blueDevice.setDevice(device);
setDevices.add(blueDevice);
blueAdapter.setSetDevices(setDevices);
blueAdapter.notifyDataSetChanged();
Log.d(MAINACTIVITY, "搜索结果......"+device.getName());
/**当绑定的状态改变时*/
else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED))
/**搜索完成*/
else if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED))
setProgressBarIndeterminateVisibility(false);
Log.d(MAINACTIVITY, "搜索完成......");
hideProgressDailog();
;5.配对蓝牙:
配对工具类
public class BlueUtils
public BlueUtils(BlueDevice blueDevice)
this.blueDevice = blueDevice;
/**
* 配对
*/
public void doPair()
if(null == mOthHandler)
HandlerThread handlerThread = new HandlerThread("other_thread");
handlerThread.start();
mOthHandler = new Handler(handlerThread.getLooper());
mOthHandler.post(new Runnable()
@Override
public void run()
initSocket(); //取得socket
try
socket.connect(); //请求配对
// mAdapterManager.updateDeviceAdapter();
catch (IOException e)
e.printStackTrace();
);
/**
* 取消蓝牙配对
* @param device
*/
public static void unpairDevice(BluetoothDevice device)
try
Method m = device.getClass()
.getMethod("removeBond", (Class[]) null);
m.invoke(device, (Object[]) null);
catch (Exception e)
Log.d("BlueUtils", e.getMessage());
/**
* 取得BluetoothSocket
*/
private void initSocket()
BluetoothSocket temp = null;
try
Method m = blueDevice.getDevice().getClass().getMethod("createRfcommSocket", new Class[] int.class);
temp = (BluetoothSocket) m.invoke(blueDevice.getDevice(), 1);
//怪异错误： 直接赋值给socket,对socket操作可能出现异常， 要通过中间变量temp赋值给socket
catch (SecurityException e)
e.printStackTrace();
catch (NoSuchMethodException e)
e.printStackTrace();
catch (IllegalArgumentException e)
e.printStackTrace();
catch (IllegalAccessException e)
e.printStackTrace();
catch (InvocationTargetException e)
e.printStackTrace();
socket = temp;
注册监听配对结果的广播（使用同上面的注册代码）
/**注册搜索蓝牙receiver*/
mFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
mFilter.addAction(BluetoothDevice.ACTION_FOUND);
mFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
registerReceiver(mReceiver, mFilter);开始配对
/**
* 开始配对蓝牙设备
*
* @param blueDevice
*/
private void startPariBlue(BlueDevice blueDevice)
BlueUtils blueUtils = new BlueUtils(blueDevice);
blueUtils.doPair();
监听配对结果：（使用同上面的广播接收者）
private BroadcastReceiver mReceiver = new BroadcastReceiver()
@Override
public void onReceive(Context context, Intent intent)
String action = intent.getAction();
/** 搜索到的蓝牙设备*/
if (action.equals(BluetoothDevice.ACTION_FOUND))
.....
/**当绑定的状态改变时*/
else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED))
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
switch (device.getBondState())
case BluetoothDevice.BOND_BONDING:
Log.d(MAINACTIVITY, "正在配对......");
break;
case BluetoothDevice.BOND_BONDED:
Log.d(MAINACTIVITY, "完成配对");
hideProgressDailog();
/**开始连接*/
contectBuleDevices();
break;
case BluetoothDevice.BOND_NONE:
Log.d(MAINACTIVITY, "取消配对");
Toast.makeText(MainActivity.this,"成功取消配对",Toast.LENGTH_SHORT).show();
getBondedDevices();
break;
default:
break;
/**搜索完成*/
else if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED))
....
;6.使用A2DP协议连接蓝牙设备:
连接设备
/**
* 开始连接蓝牙设备
*/
private void contectBuleDevices()
/**使用A2DP协议连接设备*/
mBluetoothAdapter.getProfileProxy(this, mProfileServiceListener, BluetoothProfile.A2DP);
监听连接的回调
/**
* 连接蓝牙设备（通过监听蓝牙协议的服务，在连接服务的时候使用BluetoothA2dp协议）
*/
private BluetoothProfile.ServiceListener mProfileServiceListener = new BluetoothProfile.ServiceListener()
@Override
public void onServiceDisconnected(int profile)
@Override
public void onServiceConnected(int profile, BluetoothProfile proxy)
try
if (profile == BluetoothProfile.HEADSET)
....
else if (profile == BluetoothProfile.A2DP)
/**使用A2DP的协议连接蓝牙设备（使用了反射技术调用连接的方法）*/
a2dp = (BluetoothA2dp) proxy;
if (a2dp.getConnectionState(currentBluetoothDevice) != BluetoothProfile.STATE_CONNECTED)
a2dp.getClass()
.getMethod("connect", BluetoothDevice.class)
.invoke(a2dp, currentBluetoothDevice);
Toast.makeText(MainActivity.this,"请播放音乐",Toast.LENGTH_SHORT).show();
getBondedDevices();
catch (Exception e)
e.printStackTrace();
;
7.添加权限
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />8.打开乐库播放音乐
9.Android 6.0的系统需要动态添加权限才能搜索出蓝牙设备
Android 6.0的系统需要动态添加权限
/**判断手机系统的版本*/
if (Build.VERSION.SDK_INT >= 6.0) //Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
if(ActivityCompat.checkSelfPermission(this,Manifest.permission.ACCESS_COARSE_LOCATION)!=PackageManager.PERMISSION_GRANTED)
/**动态添加权限：ACCESS_FINE_LOCATION*/
ActivityCompat.requestPermissions(this, new String[]Manifest.permission.ACCESS_FINE_LOCATION,
MY_PERMISSION_REQUEST_CONSTANT);
请求权限的回调
/**请求权限的回调：这里判断权限是否添加成功*/
/**请求权限的回调：这里判断权限是否添加成功*/
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults)
switch (requestCode)
case MY_PERMISSION_REQUEST_CONSTANT:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
Log.i("main","添加权限成功");
return;
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