Question

怎么用android获取bluetooth的信号强度

Answer 1

android获取蓝牙bluetooth的信号强度步骤如下：

1. 在oncreate方法里面增加 注册扫描广播 
   public void onCreate(Bundle savedInstanceState) { 
                     
                       // 注册开始发现广播。 
                                IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED); 
                                this.registerReceiver(mReceiver, filter); 
                                  
               } 
   2.新建BroadcastReceiver广播对象，并实现里面的onreceive方法,在onreceive得到rssi（信号强度）。 
   private final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
                   @Override 
                   public void onReceive(Context context, Intent intent) { 
                           String action = intent.getAction(); 
     
                           //当设备开始扫描时。 
                           if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
                                   //从Intent得到blueDevice对象 
                                   BluetoothDevice device = intent 
                                                   .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
                                     
                                   if (device.getBondState() != BluetoothDevice.BOND_BONDED) { 
     
                                           //信号强度。 
                                           short rssi = intent.getExtras().getShort( 
                                                           BluetoothDevice.EXTRA_RSSI); 
                                                     
                                   } 
                                     
                           }  
                   } 
           }; 

Answer 2

要拿到蓝牙信号指示值 rssi 分为两个步骤。
1.在oncreate方法里面增加 注册扫描广播
public void onCreate(Bundle savedInstanceState) {

// 注册开始发现广播。
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);
this.registerReceiver(mReceiver, filter);

}
2.新建BroadcastReceiver广播对象，并实现里面的onreceive方法,在onreceive得到rssi（信号强度）。
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();

//当设备开始扫描时。
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
//从Intent得到blueDevice对象
BluetoothDevice device = intent
.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);

if (device.getBondState() != BluetoothDevice.BOND_BONDED) {

//信号强度。
short rssi = intent.getExtras().getShort(
BluetoothDevice.EXTRA_RSSI);

}

}
}
};