Android操作蓝牙

        Android操作蓝牙       

        分类：            Android开发2012-10-07 20:24920人阅读评论(0)收藏举报

androidclassapinull

目录(?)[+]

1. 检测一个设备是否有蓝牙设备开启蓝牙设备获取配对的设备
2. 设置蓝牙的可见时间以便被其他设备发现并连接
3. 获取扫描到的设备

1检测一个设备是否有蓝牙设备，开启蓝牙设备，获取配对的设备

这些操作需要权限

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

下面是判断是否有蓝牙设备，是否开启蓝牙，若没有开启则请求开启蓝牙

[java] view plaincopyprint?

1. <span style="font-family: SimSun; font-size: 18px;">BluetoothAdapter ba=BluetoothAdapter.getDefaultAdapter(); 
2.     if(null!=ba) 
3.     { 
4.         System.out.println("本机有蓝牙设备"); 
5.                  
6.         if(!ba.isEnabled()) 
7.               { 
8. </span><span style="font-family: SimSun; font-size: 18px;">          Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
9.               startActivity(intent);//或者ba.enable();  //同样的关闭WIFi为ba.disable(); 
10.               } 
11.         }</span> 

BluetoothAdapter ba=BluetoothAdapter.getDefaultAdapter();if(null!=ba){System.out.println("本机有蓝牙设备");if(!ba.isEnabled())          {     Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);      startActivity(intent);//或者ba.enable();  //同样的关闭WIFi为ba.disable();          }        }

下面的代码是获取已经配对的蓝牙设备

[java] view plaincopyprint?

1. <span style="font-family: SimSun; font-size: 18px;">Set<BluetoothDevice> device=ba.getBondedDevices(); 
2.      if(device.size()>0) 
3.     { 
4.        for(BluetoothDevice bd:device) 
5.         { 
6.             System.out.println(bd.getAddress()+bd.getName()); 
7.         } 
8.     } 
9.                     </span> 

Set<BluetoothDevice> device=ba.getBondedDevices();     if(device.size()>0){   for(BluetoothDevice bd:device){System.out.println(bd.getAddress()+bd.getName());}}

2.设置蓝牙的可见时间，以便被其他设备发现并连接

需要权限

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

设置蓝牙的可见时间

[java] view plaincopyprint?

1. Intent intentvisible=new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); 
2.          
3. intentvisible.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,400); 
4. //这个值么默认120秒，超过300秒将会被设置为300.可是在我的设备上是2400也行。API出错？ 
5. this.startActivity(intentvisible); 

Intent intentvisible=new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);intentvisible.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 400);//这个值么默认120秒，超过300秒将会被设置为300.可是在我的设备上是2400也行。API出错？this.startActivity(intentvisible);

3.获取扫描到的设备

需要权限

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

开始扫描的代码

[java] view plaincopyprint?

1. BluetoothAdapter ba=BluetoothAdapter.getDefaultAdapter(); 
2.             ba.startDiscovery(); 

BluetoothAdapter ba=BluetoothAdapter.getDefaultAdapter();ba.startDiscovery();

消耗12秒的时间，耗电量大

当扫描到广播后，会发送广播消息，注册一个广播来接收

[java] view plaincopyprint?

1. class MyReceiver extends BroadcastReceiver 
2.     { 
3.  
4.         @Override 
5.         public void onReceive(Context context, Intent intent) { 
6.  
7.             BluetoothDevice bd=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
8.             Toast.makeText(BluetoothActivity.this, bd.getName(), Toast.LENGTH_SHORT).show(); 
9.              
10.              
11.              
12.         } 
13.          
14.     } 

class MyReceiver extends BroadcastReceiver    {@Overridepublic void onReceive(Context context, Intent intent) {BluetoothDevice bd=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);Toast.makeText(BluetoothActivity.this, bd.getName(), Toast.LENGTH_SHORT).show();}        }

注册这个广播

[java] view plaincopyprint?

1. IntentFilter intentfilter=new IntentFilter(BluetoothDevice.ACTION_FOUND); 
2.        MyReceiver mr=new MyReceiver(); 
3.        this.registerReceiver(mr, intentfilter); 

 IntentFilter intentfilter=new IntentFilter(BluetoothDevice.ACTION_FOUND);        MyReceiver mr=new MyReceiver();        this.registerReceiver(mr, intentfilter);

注册一个扫描完毕的广播：

[java] view plaincopyprint?

1. class FinishFound extends BroadcastReceiver 
2.    { 
3.  
4.     @Override 
5.     public void onReceive(Context context, Intent intent) { 
6.         BluetoothActivity.this.unregisterReceiver(this); 
7.         BluetoothActivity.this.unregisterReceiver(mr); 
8.     } 
9.      
10.    } 

 class FinishFound extends BroadcastReceiver    {@Overridepublic void onReceive(Context context, Intent intent) {BluetoothActivity.this.unregisterReceiver(this);BluetoothActivity.this.unregisterReceiver(mr);}        }

在这个广播中关闭扫描到蓝牙通知的广播，并且关闭自己

注册这个广播我就不说了

下载工程：点击下载