Android 扫描周围蓝牙设备

package com.zhoucj.bluetooth;

import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

private Button bluetoothBtn;
BluetoothAdapter adapter;//本地蓝牙适配器
//BluetoothDevice device;//远程蓝牙适配器
BluetoothReceiver bluetoothReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bluetoothBtn=(Button)findViewById(R.id.bluetooth);
bluetoothBtn.setOnClickListener(listener);

//创建一个IntentFilter对象，将action指定为 BluetoothDevices.ACTION_FOUND；
IntentFilter intentFilter=new IntentFilter(BluetoothDevice.ACTION_FOUND);
bluetoothReceiver=new BluetoothReceiver();
//注册广播接收器
registerReceiver(bluetoothReceiver, intentFilter);
//获取本地蓝牙适配器
adapter=BluetoothAdapter.getDefaultAdapter();

}

//广播接收器
private class BluetoothReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent) {
String action=intent.getAction();
if(BluetoothDevice.ACTION_FOUND.equals(action))
{
//获取周围蓝牙设备
BluetoothDevice device=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
Log.i("msg", device.getAddress());

}

}

}

private OnClickListener listener=new OnClickListener() {
@Override
public void onClick(View arg0) {
if(adapter!=null)
{
//开始扫描周围的蓝牙设备
//如果扫描到蓝牙设备，通过广播接收器发送广播
adapter.startDiscovery();
}else
{
Log.i("msg", "没有蓝牙设备");
}
}
};

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
//卸载广播接收器
unregisterReceiver(bluetoothReceiver);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

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