android 蓝牙通信编程

               

转自：http://blog.youkuaiyun.com/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

[java]  view plain copy

1. package com.hello.project;  
2.   
3. import java.util.ArrayList;  
4. import java.util.Iterator;  
5. import java.util.List;  
6. import java.util.Set;  
7.   
8. import android.app.Activity;  
9. import android.app.AlertDialog;  
10. import android.bluetooth.BluetoothAdapter;  
11. import android.bluetooth.BluetoothDevice;  
12. import android.content.BroadcastReceiver;  
13. import android.content.Context;  
14. import android.content.DialogInterface;  
15. import android.content.Intent;  
16. import android.content.IntentFilter;  
17. import android.os.Bundle;  
18. import android.util.Log;  
19. import android.view.View;  
20. import android.view.View.OnClickListener;  
21. import android.widget.AdapterView;  
22. import android.widget.AdapterView.OnItemClickListener;  
23. import android.widget.ArrayAdapter;  
24. import android.widget.Button;  
25. import android.widget.ListView;  
26.   
27. public class SearchDeviceActivity extends Activity implements OnItemClickListener{  
28.   
29.   
30.     private BluetoothAdapter blueadapter=null;  
31.     private DeviceReceiver mydevice=new DeviceReceiver();  
32.     private List<String> deviceList=new ArrayList<String>();  
33.     private ListView deviceListview;  
34.     private Button btserch;  
35.     private ArrayAdapter<String> adapter;  
36.     private boolean hasregister=false;  
37.       
38.     @Override  
39.     protected void onCreate(Bundle savedInstanceState) {  
40.         super.onCreate(savedInstanceState);  
41.         setContentView(R.layout.finddevice);  
42.         setView();  
43.         setBluetooth();  
44.           
45.     }  
46.       
47.     private void setView(){  
48.       
49.         deviceListview=(ListView)findViewById(R.id.devicelist);  
50.         adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, deviceList);  
51.         deviceListview.setAdapter(adapter);  
52.         deviceListview.setOnItemClickListener(this);  
53.         btserch=(Button)findViewById(R.id.start_seach);  
54.         btserch.setOnClickListener(new ClinckMonitor());  
55.           
56.     }  
57.   
58.     @Override  
59.     protected void onStart() {  
60.         //注册蓝牙接收广播  
61.         if(!hasregister){  
62.             hasregister=true;  
63.             IntentFilter filterStart=new IntentFilter(BluetoothDevice.ACTION_FOUND);      
64.             IntentFilter filterEnd=new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);      
65.             registerReceiver(mydevice, filterStart);  
66.             registerReceiver(mydevice, filterEnd);  
67.         }         
68.         super.onStart();  
69.     }  
70.   
71.     @Override  
72.     protected void onDestroy() {  
73.         if(blueadapter!=null&&blueadapter.isDiscovering()){  
74.             blueadapter.cancelDiscovery();  
75.         }  
76.         if(hasregister){  
77.             hasregister=false;  
78.             unregisterReceiver(mydevice);  
79.         }  
80.         super.onDestroy();  
81.     }  
82.     /** 
83.      * Setting Up Bluetooth 
84.      */  
85.     private void setBluetooth(){  
86.          blueadapter=BluetoothAdapter.getDefaultAdapter();  
87.            
88.             if(blueadapter!=null){  //Device support Bluetooth  
89.                 //确认开启蓝牙  
90.                 if(!blueadapter.isEnabled()){  
91.                     //请求用户开启  
92.                     Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);  
93.                     startActivityForResult(intent, RESULT_FIRST_USER);  
94.                     //使蓝牙设备可见，方便配对  
95.                     Intent in=new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);  
96.                     in.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 200);  
97.                     startActivity(in);  
98.                     //直接开启，不经过提示  
99.                     blueadapter.enable();  
100.                 }  
101.             }  
102.             else{   //Device does not support Bluetooth  
103.                   
104.                 AlertDialog.Builder dialog = new AlertDialog.Builder(this);  
105.                 dialog.setTitle("No bluetooth devices");  
106.                 dialog.setMessage("Your equipment does not support bluetooth, please change device");  
107.                   
108.                 dialog.setNegativeButton("cancel",  
109.                         new DialogInterface.OnClickListener() {  
110.                             @Override  
111.                             public void onClick(DialogInterface dialog, int which) {  
112.                                   
113.                             }  
114.                         });  
115.                 dialog.show();  
116.             }  
117.     }  
118.       
119.     /** 
120.      * Finding Devices 
121.      */  
122.     private void findAvalibleDevice(){  
123.         //获取可配对蓝牙设备  
124.         Set<BluetoothDevice> device=blueadapter.getBondedDevices();  
125.           
126.         if(blueadapter!=null&&blueadapter.isDiscovering()){  
127.             deviceList.clear();  
128.             adapter.notifyDataSetChanged();  
129.         }  
130.         if(device.size()>0){ //存在已经配对过的蓝牙设备  
131.             for(Iterator<BluetoothDevice> it=device.iterator();it.hasNext();){  
132.                 BluetoothDevice btd=it.next();  
133.                 deviceList.add(btd.getName()+'\n'+btd.getAddress());