[Android蓝牙]搜索周围蓝牙设备

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">搜索周围蓝牙设备，在我看来，有三个重要的地方，1.定义mReceiver，在这里面编写显示未匹配的蓝牙设备的代码</span>

package com.example.bluetoothtest;

import java.util.Set;

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.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

	private Button mBtn;
	private TextView mTv;
	private BluetoothAdapter mBtAdapter;
	
	private BroadcastReceiver mReceiver = new BroadcastReceiver(){

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			String action = intent.getAction();
			if(action.equals(BluetoothDevice.ACTION_FOUND)){
				
				BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
					if(device.getBondState() != BluetoothDevice.BOND_BONDED)
						mTv.append(device.getName() + "\n\n");
			}else if(action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){
				mBtAdapter.cancelDiscovery();
			}
		}
		
	};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		mTv = (TextView)findViewById(R.id.tv_show);
		mBtAdapter = BluetoothAdapter.getDefaultAdapter();
		mBtn = (Button)findViewById(R.id.button_search);
		mBtn.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				if(mBtAdapter.isDiscovering())
					mBtAdapter.cancelDiscovery();
				mBtAdapter.startDiscovery();
			}
		});
		
		Set<BluetoothDevice> devices = mBtAdapter.getBondedDevices();
		if(devices.size() > 0){
			for(BluetoothDevice device : devices){
				mTv.append(device.getName() + "\n\n");
			}
		}
		
		IntentFilter mFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
		registerReceiver(mReceiver,mFilter);
		
		mFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
		registerReceiver(mReceiver, mFilter);
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		unregisterReceiver(mReceiver);
	}
}