android40蓝牙
1. 如何实现android蓝牙自动配对连接
之前做一个Android版的蓝牙 与血压计通讯的项目,遇到最大的难题就是自动配对.
上网查资料说是用反射createBond()和setPin(),但测试时进行配对还是会出现提示,但配对是成功了
我就开始查找怎么关闭这个蓝牙配对提示框,后面还是伟大的android源码帮助了我。
在源码 BluetoothDevice 类中还有两个隐藏方法
cancelBondProcess()和cancelPairingUserInput()
这两个方法一个是取消配对进程一个是取消用户输入
下面是自动配对的代码
Mainfest,xml注册
1 <receiver android:name="." >
2 <intent-filter>
3 <action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
4 </intent-filter>
5 </receiver>
自己在收到广播时处理并将预先输入的密码设置进去
01 public class extends BroadcastReceiver
02 {
03
04 String strPsw = "0";
05
06 @Override
07 public void onReceive(Context context, Intent intent)
08 {
09 // TODO Auto-generated method stub
10 if (intent.getAction().equals(
11 "android.bluetooth.device.action.PAIRING_REQUEST"))
12 {
13 BluetoothDevice btDevice = intent
14 .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
15
16 // byte[] pinBytes = BluetoothDevice.convertPinToBytes("1234");
17 // device.setPin(pinBytes);
18 Log.i("tag11111", "ddd");
19 try
20 {
21 ClsUtils.setPin(btDevice.getClass(), btDevice, strPsw); // 手机和蓝牙采集器配对
22 ClsUtils.createBond(btDevice.getClass(), btDevice);
23 ClsUtils.cancelPairingUserInput(btDevice.getClass(), btDevice);
24 }
25 catch (Exception e)
26 {
27 // TODO Auto-generated catch block
28 e.printStackTrace();
29 }
30 }
31
32
33 }
34 }
001 <b>/************************************ 蓝牙配对函数 * **************/
002 import java.lang.reflect.Field;
003 import java.lang.reflect.Method;
004
005 import android.bluetooth.BluetoothDevice;
006 import android.util.Log;
007 public class ClsUtils
008 {
009
010 /**
011 * 与设备配对 参考源码:platform/packages/apps/Settings.git
012 * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
013 */
014 static public boolean createBond(Class btClass, BluetoothDevice btDevice)
015 throws Exception
016 {
017 Method createBondMethod = btClass.getMethod("createBond");
018 Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice);
019 return returnValue.booleanValue();
020 }
021
022 /**
023 * 与设备解除配对 参考源码:platform/packages/apps/Settings.git
024 * /Settings/src/com/android/settings/bluetooth/CachedBluetoothDevice.java
025 */
026 static public boolean removeBond(Class btClass, BluetoothDevice btDevice)
027 throws Exception
028 {
029 Method removeBondMethod = btClass.getMethod("removeBond");
030 Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice);
031 return returnValue.booleanValue();
032 }
033
034 static public boolean setPin(Class btClass, BluetoothDevice btDevice,
035 String str) throws Exception
036 {
037 try
038 {
039 Method removeBondMethod = btClass.getDeclaredMethod("setPin",
040 new Class[]
041 {byte[].class});
042 Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice,
043 new Object[]
044 {str.getBytes()});
045 Log.e("returnValue", "" + returnValue);
046 }
047 catch (SecurityException e)
048 {
049 // throw new RuntimeException(e.getMessage());
050 e.printStackTrace();
051 }
052 catch (IllegalArgumentException e)
053 {
054 // throw new RuntimeException(e.getMessage());
055 e.printStackTrace();
056 }
057 catch (Exception e)
058 {
059 // TODO Auto-generated catch block
060 e.printStackTrace();
061 }
062 return true;
063
064 }
065
066 // 取消用户输入
067 static public boolean cancelPairingUserInput(Class btClass,
068 BluetoothDevice device)
069
070 throws Exception
071 {
072 Method createBondMethod = btClass.getMethod("cancelPairingUserInput");
073 // cancelBondProcess()
074 Boolean returnValue = (Boolean) createBondMethod.invoke(device);
075 return returnValue.booleanValue();
076 }
077
078 // 取消配对
079 static public boolean cancelBondProcess(Class btClass,
080 BluetoothDevice device)
081
082 throws Exception
083 {
084 Method createBondMethod = btClass.getMethod("cancelBondProcess");
085 Boolean returnValue = (Boolean) createBondMethod.invoke(device);
086 return returnValue.booleanValue();
087 }
088
089 /**
090 *
091 * @param clsShow
092 */
093 static public void printAllInform(Class clsShow)
094 {
095 try
096 {
097 // 取得所有方法
098 Method[] hideMethod = clsShow.getMethods();
099 int i = 0;
100 for (; i < hideMethod.length; i++)
101 {
102 Log.e("method name", hideMethod[i].getName() + ";and the i is:"
103 + i);
104 }
105 // 取得所有常量
106 Field[] allFields = clsShow.getFields();
107 for (i = 0; i < allFields.length; i++)
108 {
109 Log.e("Field name", allFields[i].getName());
110 }
111 }
112 catch (SecurityException e)
113 {
114 // throw new RuntimeException(e.getMessage());
115 e.printStackTrace();
116 }
117 catch (IllegalArgumentException e)
118 {
119 // throw new RuntimeException(e.getMessage());
120 e.printStackTrace();
121 }
122 catch (Exception e)
123 {
124 // TODO Auto-generated catch block
125 e.printStackTrace();
126 }
127 }
128 }</b>
执行时直接使用:
view sourceprint?
01 <b>public static boolean pair(String strAddr, String strPsw)
02 {
03 boolean result = false;
04 BluetoothAdapter bluetoothAdapter = BluetoothAdapter
05 .getDefaultAdapter();
06
07 bluetoothAdapter.cancelDiscovery();
08
09 if (!bluetoothAdapter.isEnabled())
10 {
11 bluetoothAdapter.enable();
12 }
13
14 if (!BluetoothAdapter.checkBluetoothAddress(strAddr))
15 { // 检查蓝牙地址是否有效
16
17 Log.d("mylog", "devAdd un effient!");
18 }
19
20 BluetoothDevice device = bluetoothAdapter.getRemoteDevice(strAddr);
21
22 if (device.getBondState() != BluetoothDevice.BOND_BONDED)
23 {
24 try
25 {
26 Log.d("mylog", "NOT BOND_BONDED");
27 ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对
28 ClsUtils.createBond(device.getClass(), device);
29 remoteDevice = device; // 配对完毕就把这个设备对象传给全局的remoteDevice
30 result = true;
31 }
32 catch (Exception e)
33 {
34 // TODO Auto-generated catch block
35
36 Log.d("mylog", "setPiN failed!");
37 e.printStackTrace();
38 } //
39
40 }
41 else
42 {
43 Log.d("mylog", "HAS BOND_BONDED");
44 try
45 {
46 ClsUtils.createBond(device.getClass(), device);
47 ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对
48 ClsUtils.createBond(device.getClass(), device);
49 remoteDevice = device; // 如果绑定成功,就直接把这个设备对象传给全局的remoteDevice
50 result = true;
51 }
52 catch (Exception e)
53 {
54 // TODO Auto-generated catch block
55 Log.d("mylog", "setPiN failed!");
56 e.printStackTrace();
57 }
58 }
59 return result;
60 }</b>
2. [Android P] 蓝牙mac地址的读取与修改
蓝牙设备地址(BD_ADDR)是一个48bit的唯一标识符,由LAP(24位地址低端部分)、UAP(8位地址高端部分)和NAP(16位无意义地址部分)组成,其格式如下所示:
NAP和UAP是蓝牙设备生产厂商的唯一标识码,由SIG分配给各个厂商;LAP则由厂商自行分配。
其中,bit40为组播地址标志位,其值为0:unicast(单播),其值为1:multicast(组播);bit41为地址类型标志位,其值为0:universal addr,其值为1:local addr。
在函数 BluetoothAddress::GetLocalAddress() 中展示了数种方式读取蓝牙BD_ADDR。
首先函数 fetch_vendor_addr(local_addr) 读取存储在vendor下bt_nv.bin文件中的蓝牙地址:
其次是从system property中获取本地蓝牙地址路径:
若以上两种方法均不能获得BD_ADDR,则尝试从factory property中获取:
再者,若从factory property中也无法获取到BD_ADDR,可以从之前保存的BDA中查找:
以上方法均无法获取到固定地址时,则生成随机地址,其形式为 0x22:22:xx:xx:xx:xx ,然后将之保存在property之中,每次重新开关机后会生成新的随机地址:
3. 如何实现android蓝牙开发 自动配对连接,并不弹出提示框
在源码 BluetoothDevice 类中还有两个隐藏方法 cancelBondProcess()和cancelPairingUserInput() 这两个方法一个是取消配对进程一个是取消用户输入 下面是自动配对的代码 Mainfest,xml注册 1 <</code>receiver android:name="." > 2 <</code>intent-filter> 3 <</code>action android:name="android.bluetooth.device.action.PAIRING_REQUEST" /> 4 </</code>intent-filter> 5 </</code>receiver> 自己在收到广播时处理并将预先输入的密码设置进去 01 public class extends BroadcastReceiver 02 { 03 04 String strPsw = "0"; 05 06 @Override 07 public void onReceive(Context context, Intent intent) 08 { 09 // TODO Auto-generated method stub 10 if (intent.getAction().equals( 11 "android.bluetooth.device.action.PAIRING_REQUEST")) 12 { 13 BluetoothDevice btDevice = intent 14 .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 15 16 // byte[] pinBytes = BluetoothDevice.convertPinToBytes("1234"); 17 // device.setPin(pinBytes); 18 Log.i("tag11111", "ddd"); 19 try 20 { 21 ClsUtils.setPin(btDevice.getClass(), btDevice, strPsw); // 手机和蓝牙采集器配对 22 ClsUtils.createBond(btDevice.getClass(), btDevice); 23 ClsUtils.cancelPairingUserInput(btDevice.getClass(), btDevice); 24 } 25 catch (Exception e) 26 { 27 // TODO Auto-generated catch block 28 e.printStackTrace(); 29 } 30 } 31 32 33 } 34 } 001 002 import java.lang.reflect.Field; 003 import java.lang.reflect.Method; 004 005 import android.bluetooth.BluetoothDevice; 006 import android.util.Log; 007 public class ClsUtils 008 { 009 010 014 static public boolean createBond(Class btClass, BluetoothDevice btDevice) 015 throws Exception 016 { 017 Method createBondMethod = btClass.getMethod("createBond"); 018 Boolean returnValue = (Boolean) createBondMethod.invoke(btDevice); 019 return returnValue.booleanValue(); 020 } 021 022 026 static public boolean removeBond(Class btClass, BluetoothDevice btDevice) 027 throws Exception 028 { 029 Method removeBondMethod = btClass.getMethod("removeBond"); 030 Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice); 031 return returnValue.booleanValue(); 032 } 033 034 static public boolean setPin(Class btClass, BluetoothDevice btDevice, 035 String str) throws Exception 036 { 037 try 038 { 039 Method removeBondMethod = btClass.getDeclaredMethod("setPin", 040 new Class[] 041 {byte[].class}); 042 Boolean returnValue = (Boolean) removeBondMethod.invoke(btDevice, 043 new Object[] 044 {str.getBytes()}); 045 Log.e("returnValue", "" + returnValue); 046 } 047 catch (SecurityException e) 048 { 049 // throw new RuntimeException(e.getMessage()); 050 e.printStackTrace(); 051 } 052 catch (IllegalArgumentException e) 053 { 054 // throw new RuntimeException(e.getMessage()); 055 e.printStackTrace(); 056 } 057 catch (Exception e) 058 { 059 // TODO Auto-generated catch block 060 e.printStackTrace(); 061 } 062 return true; 063 064 } 065 066 // 取消用户输入 067 static public boolean cancelPairingUserInput(Class btClass, 068 BluetoothDevice device) 069 070 throws Exception 071 { 072 Method createBondMethod = btClass.getMethod("cancelPairingUserInput"); 073 // cancelBondProcess() 074 Boolean returnValue = (Boolean) createBondMethod.invoke(device); 075 return returnValue.booleanValue(); 076 } 077 078 // 取消配对 079 static public boolean cancelBondProcess(Class btClass, 080 BluetoothDevice device) 081 082 throws Exception 083 { 084 Method createBondMethod = btClass.getMethod("cancelBondProcess"); 085 Boolean returnValue = (Boolean) createBondMethod.invoke(device); 086 return returnValue.booleanValue(); 087 } 088 089 093 static public void printAllInform(Class clsShow) 094 { 095 try 096 { 097 // 取得所有方法 098 Method[] hideMethod = clsShow.getMethods(); 099 int i = 0; 100 for (; i < hideMethod.length; i++) 101 { 102 Log.e("method name", hideMethod[i].getName() + ";and the i is:" 103 + i); 104 } 105 // 取得所有常量 106 Field[] allFields = clsShow.getFields(); 107 for (i = 0; i < allFields.length; i++) 108 { 109 Log.e("Field name", allFields[i].getName()); 110 } 111 } 112 catch (SecurityException e) 113 { 114 // throw new RuntimeException(e.getMessage()); 115 e.printStackTrace(); 116 } 117 catch (IllegalArgumentException e) 118 { 119 // throw new RuntimeException(e.getMessage()); 120 e.printStackTrace(); 121 } 122 catch (Exception e) 123 { 124 // TODO Auto-generated catch block 125 e.printStackTrace(); 126 } 127 } 128 } 执行时直接使用: 01 public static boolean pair(String strAddr, String strPsw) 02 { 03 boolean result = false; 04 BluetoothAdapter bluetoothAdapter = BluetoothAdapter 05 .getDefaultAdapter(); 06 07 bluetoothAdapter.cancelDiscovery(); 08 09 if (!bluetoothAdapter.isEnabled()) 10 { 11 bluetoothAdapter.enable(); 12 } 13 14 if (!BluetoothAdapter.checkBluetoothAddress(strAddr)) 15 { // 检查蓝牙地址是否有效 16 17 Log.d("mylog", "devAdd un effient!"); 18 } 19 20 BluetoothDevice device = bluetoothAdapter.getRemoteDevice(strAddr); 21 22 if (device.getBondState() != BluetoothDevice.BOND_BONDED) 23 { 24 try 25 { 26 Log.d("mylog", "NOT BOND_BONDED"); 27 ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对 28 ClsUtils.createBond(device.getClass(), device); 29 remoteDevice = device; // 配对完毕就把这个设备对象传给全局的remoteDevice 30 result = true; 31 } 32 catch (Exception e) 33 { 34 // TODO Auto-generated catch block 35 36 Log.d("mylog", "setPiN failed!"); 37 e.printStackTrace(); 38 } // 39 40 } 41 else 42 { 43 Log.d("mylog", "HAS BOND_BONDED"); 44 try 45 { 46 ClsUtils.createBond(device.getClass(), device); 47 ClsUtils.setPin(device.getClass(), device, strPsw); // 手机和蓝牙采集器配对 48 ClsUtils.createBond(device.getClass(), device); 49 remoteDevice = device; // 如果绑定成功,就直接把这个设备对象传给全局的remoteDevice 50 result = true; 51 } 52 catch (Exception e) 53 { 54 // TODO Auto-generated catch block 55 Log.d("mylog", "setPiN failed!"); 56 e.printStackTrace(); 57 } 58 } 59 return result; 60 }