我有以下设置:
Android 设备使用“客户端”套接字连接到远程嵌入式设备,Android 应用程序使用以下代码片段连接到嵌入式设备。
在嵌入式设备上使用MindTree BT堆栈,其中服务器串行套接字是根据Android应用程序熟悉的设备中的一些属性准备的,嵌入式设备上定义的连接是不安全的!
两种应用程序的组合适用于:
- 2 款 LG 手机不同型号(版本代码 < 10使用“普通方法”)
- 2 HTC 的不同型号(版本代码<10使用“解决方法”)
- Pantech 平板电脑(版本代码 < 13使用“解决方法”)
今天,我在三星 S3、摩托罗拉 MB886 和 Nexus 7 上尝试了该应用程序...调用socket.connect()时都导致“权限被拒绝” ...(我在清单中有适当的权限,否则它将无法在其他设备上运行。)
我测试过的所有新设备都是版本代码> 4.0,所以我想知道:
有人知道 API 的任何变化吗?也许 Android 4.0+ 会强制安全?
似乎错误发生在绑定状态,因为我可以在嵌入式程序日志中看到......
有什么见解吗?
编码:
public final synchronized int connectToDevice(int connectingMethod)
throws BluetoohConnectionException {
if (socket != null)
throw new BadImplementationException("Error socket is not null!!");
connecting = true;
logInfo("+---+ Connecting to device...");
try {
lastException = null;
lastPacket = null;
if (connectingMethod == BluetoothModule.BT_StandardConnection
|| connectingMethod == BluetoothModule.BT_ConnectionTBD)
try {
socket = fetchBT_Socket_Normal();
connectToSocket(socket);
listenForIncomingSPP_Packets();
onConnetionEstablished();
return BluetoothModule.BT_StandardConnection;
} catch (BluetoohConnectionException e) {
socket = null;
if (connectingMethod == BluetoothModule.BT_StandardConnection) {
throw e;
}
logWarning("Error creating socket!", e);
}
if (connectingMethod == BluetoothModule.BT_ReflectiveConnection
|| connectingMethod == BluetoothModule.BT_ConnectionTBD)
try {
socket = fetchBT_Socket_Reflection(1);
connectToSocket(socket);
listenForIncomingSPP_Packets();
onConnetionEstablished();
return BluetoothModule.BT_ReflectiveConnection;
} catch (BluetoohConnectionException e) {
socket = null;
if (connectingMethod == BluetoothModule.BT_ReflectiveConnection) {
throw e;
}
logWarning("Error creating socket!", e);
}
throw new BluetoohConnectionException("Error creating RFcomm socket for BT Device:" + this
+ "\n BAD connectingMethod==" + connectingMethod);
} finally {
connecting = false;
}
}
protected void onConnetionEstablished() {
logInfo("+---+ Connection established");
}
private synchronized void listenForIncomingSPP_Packets() {
if (socketListeningThread != null)
throw new BadImplementationException("Already lisening on Socket for BT Device" + this);
logInfo("+---+ Listening for incoming packets");
socketListeningThread = new Thread(socketListener, "Packet Listener - " + bluetoothDevice.getName());
socketListeningThread.start();
}
private BluetoothSocket fetchBT_Socket_Normal()
throws BluetoohConnectionException {
try {
logInfo("+---+ Fetching BT RFcomm Socket standard for UUID: " + uuid + "...");
return bluetoothDevice.createRfcommSocketToServiceRecord(UUID.fromString(uuid));
} catch (Exception e) {
throw new BluetoohConnectionException("Error Fetching BT RFcomm Socket!", e);
}
}
private BluetoothSocket fetchBT_Socket_Reflection(int connectionIndex)
throws BluetoohConnectionException {
Method m;
try {
logInfo("+---+ Fetching BT RFcomm Socket workaround index " + connectionIndex + "...");
m = bluetoothDevice.getClass().getMethod("createRfcommSocket", new Class[]{int.class});
return (BluetoothSocket) m.invoke(bluetoothDevice, connectionIndex);
} catch (Exception e) {
throw new BluetoohConnectionException("Error Fetching BT RFcomm Socket!", e);
}
}
private void connectToSocket(BluetoothSocket socket)
throws BluetoohConnectionException {
try {
logInfo("+---+ Connecting to socket...");
socket.connect();
logInfo("+---+ Connected to socket");
} catch (IOException e) {
try {
socket.close();
} catch (IOException e1) {
logError("Error while closing socket", e1);
} finally {
socket = null;
}
throw new BluetoohConnectionException("Error connecting to socket with Device" + this, e);
}
}