Android Studio第三十三期 - 蓝牙开发初识~

遇见到坑爹的队友只有接受现实并且解决问题~




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：




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
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/shining/p010_recycleviewall/bluetooth