对于低功耗的蓝牙设备，在Android4.3（API18）有支持*/
权限：
<span style="font-size:12px;"> <!-- 任意蓝牙的交互如：请求连接、接受连接、传输数据都需要此权限-->
<uses-permission android:name="android.permission.BLUETOOTH"/>
<!-- 让蓝牙设备可见、操作蓝牙设置需要此权限，当需要此权限时必须加上上面的权限-->
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/></span></span>下面是对蓝牙的一些基本操作：
<span style="font-size:12px;">public class BlueToothOp {
private BluetoothAdapter adapter;
public BlueToothOp() {
adapter = BluetoothAdapter.getDefaultAdapter();
}
//检测蓝牙是否存在
public boolean isExist() {
if (adapter == null)
return false;
return true;
}
//检测蓝牙是否可用
public boolean isEnable() {
return adapter.isEnabled();
}
//蓝牙是否可见
public boolean isCover() {
return adapter.isDiscovering();
}
//打开蓝牙
public void open(Activity activity, int requestCode) {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
activity.startActivityForResult(intent, requestCode);
}
//设置蓝牙设备可见
public void openDiscover(Activity activity, int requestCode) {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
activity.startActivityForResult(intent, requestCode);
}
//关闭蓝牙
public void close() {
adapter.disable();
}
}</span>回调方法：
<span style="font-size:12px;"> @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 0 && resultCode == RESULT_OK){
showToast("打开蓝牙成功");
}
if(requestCode == 1 && resultCode == RESULT_OK){
showToast("打开蓝牙失败");
}
//当你选择取消时候resultCode返回RESULT_CANCELED
}</span>当然你的应用也可以监听
ACTION_STATE_CHANGED，需要注册广播：
<span style="font-size:12px;"> IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
registerReceiver(receiver,intentFilter);
}
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
int action = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,-1);
switch (action){
case BluetoothAdapter.STATE_TURNING_ON:
System.out.println("正在打开");
break;
case BluetoothAdapter.STATE_ON:
System.out.println("打开完毕");
break;
case BluetoothAdapter.STATE_TURNING_OFF:
System.out.println("正在关闭");
break;
case BluetoothAdapter.STATE_OFF:
System.out.println("关闭完毕");
break;
case BluetoothAdapter.STATE_CONNECTED://连接
System.out.println("连接完毕");
break;
case BluetoothAdapter.STATE_CONNECTING://正在连接
System.out.println("正在连接");
break;
}
}
};</span>
使用BluetoothAdapter你可以发现远程设备通过设备的discovery，也可以得到设备与远程设备绑定的集合。设备的发现更像是一个搜索周围设备的过程，然后一个在该区域的设备将会去响应该请求，前提是该设备可用并且是可见的；响应的信息包括设备的名字、类、MAC地址，使用这些信息便可以进行连接。
连接和匹配是有区别的，匹配：两个设备都知道彼此的存在，可用于身份的验证并能够建立一个加密的连接；连接：目前设备共享RFCOOM通道可以共享数据。（当两个设备之前匹配过，他们将自动进行匹配）
得到匹配的设备：
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
// If there are paired devices
if (pairedDevices.size() > 0) {
// Loop through paired devices
for (BluetoothDevice device : pairedDevices) {
// Add the name and address to an array adapter to show in a ListView
mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
}
}得到发现的设备：
通过调用startDiscovery()便可以进行发现设备。这个方法返回一个Boolean的值来表明是否发现是否成功开始，为了得到发现的设备，我们的应用必须要注册一个广播，行为：ACTION_FOUND，每一次的发现我们可以通过Intent来得到BluetoothDevice对象
// Create a BroadcastReceiver for ACTION_FOUND
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Add the name and address to an array adapter to show in a ListView
mArrayAdapter.add(device.getName() + "\n" + device.getAddress());
}
}
};
// Register the BroadcastReceiver
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroytips:发现设备是一个很复杂的过程会耗费很多的资源，一旦你发现了一个设备并进行连接，应确保你的设备停止去发现（通过你调用cancelDiscovery来实现）
设置可被发现的：
代码如下：
Intent discoverableIntent = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
startActivity(discoverableIntent);tips:默认这个设备成为可见的是120秒，这个最大值为3600秒，0秒代表这个设备总是可见的，当不再0~3600之间则自动设置120秒
具体的广播接受者：
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);//开始发现
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//发现完成
intentFilter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);//扫描模式发生改变
intentFilter.addAction(BluetoothDevice.ACTION_FOUND);//远程设备被发现
intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);//绑定状态发生改变
registerReceiver(receiver, intentFilter);BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_STARTED)) {
//开始发现设备
} else if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) {
//发现完成
} else if (action.equals(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED)) {
//扫描模式发生改变
int scanMode = intent.getIntExtra(BluetoothAdapter.EXTRA_SCAN_MODE, -1);
switch (scanMode) {
case BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE://发现但保持连接
//发现但保持连接
break;
case BluetoothAdapter.SCAN_MODE_CONNECTABLE://没发现但保持连接
//没发现但保持连接
break;
case BluetoothAdapter.SCAN_MODE_NONE://没有发现也没有保持连接
//没有发现也没有保持连接
break;
}
} else if (action.equals(BluetoothDevice.ACTION_FOUND)) {
//发现设备
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
//发现设备 名字：" + device.getName() + " MAC地址:" + device.getAddress()
} else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
//绑定状态发生改变
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if(device == null){
//"该设备不存在不能进行绑定"
return;
}
int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,-1);
switch (bondState){
case BluetoothDevice.BOND_BONDING:
//正在绑定
break;
case BluetoothDevice.BOND_BONDED:
//绑定完成
break;
case BluetoothDevice.BOND_NONE:
//绑定未成功
break;
}
}
}
};本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
