android 蓝牙通信编程

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转自：http://blog.csdn.net/yudajun/article/details/8362916

公司项目涉及蓝牙通信，所以就简单的学了学，下面是自己参考了一些资料后的总结，希望对大家有帮助。

以下是开发中的几个关键步骤：

1，首先开启蓝牙

2，搜索可用设备

3，创建蓝牙socket，获取输入输出流

4，读取和写入数据

5，断开连接关闭蓝牙

下面是一个demo

效果图：

SearchDeviceActivity.java

package com.hello.project;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class SearchDeviceActivity extends Activity implements OnItemClickListener{


    private BluetoothAdapter blueadapter=null;
    private DeviceReceiver mydevice=new DeviceReceiver();
    private List deviceList=new ArrayList();
    private ListView deviceListview;
    private Button btserch;
    private ArrayAdapter adapter;
    private boolean hasregister=false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.finddevice);
        setView();
        setBluetooth();

    }

    private void setView(){

        deviceListview=(ListView)findViewById(R.id.devicelist);
        adapter=new ArrayAdapter(this, android.R.layout.simple_list_item_1, deviceList);
        deviceListview.setAdapter(adapter);
        deviceListview.setOnItemClickListener(this);
        btserch=(Button)findViewById(R.id.start_seach);
        btserch.setOnClickListener(new ClinckMonitor());

    }

    @Override
    protected void onStart() {
        //注册蓝牙接收广播
        if(!hasregister){
            hasregister=true;
            IntentFilter filterStart=new IntentFilter(BluetoothDevice.ACTION_FOUND);