Android Studio第三十三期 - 蓝牙开发初识~

盛年不重来，一日难再晨，及时当勉励，岁月不待人。这篇文章主要讲述Android Studio第三十三期 - 蓝牙开发初识~相关的知识，希望能为你提供帮助。
遇见到坑爹的队友只有接受现实并且解决问题~

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首先介绍一下网上几乎所有的能搜到的方法：

1.首先，要操作蓝牙，先要在androidManifest.xml里加入权限

< uses-permissionandroid:name="android.permission.BLUETOOTH_ADMIN" /> < uses-permissionandroid:name="android.permission.BLUETOOTH" />

2.在android.bluetooth包下就这些能用的东西：

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3.我们一般用的是BluetoothAdapter基本就可以实现需求了：
cancelDiscovery() ：取消发现，也就是说当我们正在搜索设备的时候调用这个方法将不再继续搜索
disable()：关闭蓝牙
enable()：打开蓝牙，这个方法打开蓝牙不会弹出提示，更多的时候我们需要问下用户是否打开，一下这两行代码同样是打开蓝牙，不过会提示用户：

//打开蓝牙 if (!mBluetoothAdapter.isEnabled()) { Intent intent1 = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(intent1, ENABLE_BLUE); //不做提示，强行打开 // mAdapter.enable(); } else { close_blue(); }

@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub 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(); open_blue(); } else if (resultCode == RESULT_CANCELED) { Toast.makeText(this, "蓝牙开始失败", Toast.LENGTH_SHORT).show(); close_blue(); } } }

getAddress()：获取本地蓝牙地址
getDefaultAdapter()：获取默认BluetoothAdapter，实际上，也只有这一种方法获取BluetoothAdapter
【Android Studio第三十三期 - 蓝牙开发初识~】 getName()：获取本地蓝牙名称
getRemoteDevice(String address)：根据蓝牙地址获取远程蓝牙设备
getState()：获取本地蓝牙适配器当前状态（感觉可能调试的时候更需要）
isDiscovering()：判断当前是否正在查找设备，是返回true
isEnabled()：判断蓝牙是否打开，已打开返回true，否则，返回false
listenUsingRfcommWithServiceRecord(String name,UUID uuid)：根据名称，UUID创建并返回BluetoothServerSocket，这是创建BluetoothSocket服务器端的第一步
startDiscovery()：开始搜索，这是搜索的第一步

4.使设备能够被搜索：
首先判断初始状态：

//本机设备被扫描初始状态bufen if (mBluetoothAdapter.getScanMode() == 23) { //开启状态设置bufen //开启操作 //弹窗 // Intent intent = new Intent( // BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); // //设置蓝牙可见性的时间，方法本身规定最多可见300秒 // intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, BLUE_TIME); // startActivityForResult(intent, SEARCH_BLUE); //不弹窗 SettingblueUtils.setDiscoverableTimeout(120); shezhi_blue_research(true); new Handler().postDelayed(new Runnable() { @Override public void run() { closeDiscoverableTimeout(); shezhi_blue_research(false); } }, 120* 1000); } else if (mBluetoothAdapter.getScanMode() == 21) { //关闭状态设置bufen closeDiscoverableTimeout(); }

然后设置代码部分：

开启：

public static void setDiscoverableTimeout(int timeout) { BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); try { Method setDiscoverableTimeout = BluetoothAdapter.class.getMethod("setDiscoverableTimeout", int.class); setDiscoverableTimeout.setAccessible(true); Method setScanMode = BluetoothAdapter.class.getMethod("setScanMode", int.class, int.class); setScanMode.setAccessible(true); setDiscoverableTimeout.invoke(adapter, timeout); setScanMode.invoke(adapter, BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE, timeout); } catch (Exception e) { e.printStackTrace(); } }

关闭：

public static void closeDiscoverableTimeout() { BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); try { Method setDiscoverableTimeout = BluetoothAdapter.class.getMethod("setDiscoverableTimeout", int.class); setDiscoverableTimeout.setAccessible(true); Method setScanMode = BluetoothAdapter.class.getMethod("setScanMode", int.class, int.class); setScanMode.setAccessible(true); setDiscoverableTimeout.invoke(adapter, 1); setScanMode.invoke(adapter, BluetoothAdapter.SCAN_MODE_CONNECTABLE, 1); } catch (Exception e) { e.printStackTrace(); } }

5.抓取蓝牙列表List的方法：

// 获取所有已经绑定的蓝牙设备 Set< BluetoothDevice> devices = mBluetoothAdapter.getBondedDevices(); List< BluetoothDevice> mList1 = new ArrayList< > (); if (devices.size() > 0) { mList1 = new ArrayList< > (devices); }

6.注册搜索蓝牙receiver：

IntentFilter mFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); mFilter.addAction(BluetoothDevice.ACTION_FOUND); mFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED); mFilter.addAction(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED); mFilter.addAction(BluetoothA2dp.ACTION_PLAYING_STATE_CHANGED); registerReceiver(mReceiver, mFilter);

private BroadcastReceiver mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // TODO Auto-generated method stub String action = intent.getAction(); // 获得已经搜索到的蓝牙设备 if (action.equals(BluetoothDevice.ACTION_FOUND)) { BluetoothDevice device11 = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // 搜索到的不是已经绑定的蓝牙设备 if (!is_shebei_open) { receiver1(device11); } else { receiver11(device11); } /**当绑定的状态改变时*/ } else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) { BluetoothDevice device22 = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); receiver2(device22, MainActivity_BlueTooth.this); } else if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) { receiver3(); } else if (action.equals(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED)) { int state = intent.getIntExtra(BluetoothA2dp.EXTRA_STATE, BluetoothA2dp.STATE_DISCONNECTED); receiver4(state); } else if (action.equals(BluetoothA2dp.ACTION_PLAYING_STATE_CHANGED)) { int state = intent.getIntExtra(BluetoothA2dp.EXTRA_STATE, BluetoothA2dp.STATE_NOT_PLAYING); receiver5(state); } } };

最后说一下，多连接目前还没有解决，个人试了很多方法，大家如果有方法告诉我，谢谢~

地址：https://github.com/geeklx/MyApplication/tree/master/p010_recycleviewall/src/main/java/com/example/p010_recycleviewall/bluetooth