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[英]My Java bluetooth server on raspberry pi running debian wheezy needs bluecove native library - where can I find it?
[英]Bluetooth, BlueCove and Raspberry PI
我在RaspberryPI上使用Java使用BlueJ進行設置,並使用Blueman進行了藍牙設置,並且正在使用BlueCove API。
我從以下示例中獲取了RemoteDeviceDiscovery示例:
http://bluecove.org/bluecove/apidocs/overview-summary.html#DeviceDiscovery
當我從BlueJ中運行示例時,我得到:
“等待設備查詢完成...設備查詢完成!找到0個設備”,當我從終端窗口運行時,使用:
pi @ raspberrypi〜/ java / bluetooth_jar $ / usr / lib / jvm / jdk-8-oracle-arm-vfp-hflt / jre / bin / java -jar bluetooth_jar.jar
我得到:
“ bluez上的BlueCove版本2.1.1-SNAPSHOT BluetoothStateException異常:javax.bluetooth.BluetoothStateException:藍牙設備未准備好。[1]不允許操作BlueCove堆棧關閉已完成”
為什么在使用BlueJ時未引發異常,我不明白,但是在命令行中,由於設備未准備好,它似乎無法檢測附近的設備。 但是,我不明白此錯誤消息,因為我可以使用Blueman Manager將文件發送到附近的Android平板電腦和Win7筆記本電腦。
import java.io.IOException;
導入java.util.ArrayList; 導入javax.bluetooth。*;
/ ** *最小設備發現示例。 * /公共類RemoteDeviceDiscovery {
protected ArrayList<RemoteDevice> devicesDiscovered = new ArrayList();
protected final Object inquiryCompletedEvent = new Object();
public RemoteDeviceDiscovery()
{
DiscoveryListener listener = new MyDiscoveryListener();
synchronized(inquiryCompletedEvent) {
try
{
LocalDevice local = LocalDevice.getLocalDevice();
local.setDiscoverable(DiscoveryAgent.GIAC);
DiscoveryAgent discoveryAgent = local.getDiscoveryAgent();
// note: GIAC: The inquiry access code for General/Unlimited Inquiry Access Code (GIAC).
boolean startedInquiry = discoveryAgent.startInquiry(DiscoveryAgent.GIAC, listener);
if (startedInquiry)
{
System.out.println("wait for device inquiry to complete...");
inquiryCompletedEvent.wait();
System.out.println(devicesDiscovered.size() + " device(s) found");
}
}
catch ( BluetoothStateException e)
{
System.out.println("BluetoothStateException exception: " + e);
}
catch (InterruptedException e)
{
System.out.println("InterruptedException exception: " + e);
}
}
}
public static void main(String[] args)
{
RemoteDeviceDiscovery rmd = new RemoteDeviceDiscovery();
}
class MyDiscoveryListener implements DiscoveryListener
{
public MyDiscoveryListener()
{
}
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
System.out.println("Device " + btDevice.getBluetoothAddress() + " found");
devicesDiscovered.add(btDevice);
try {
System.out.println(" name " + btDevice.getFriendlyName(false));
} catch (IOException cantGetDeviceName) {
}
}
public void inquiryCompleted(int discType) {
System.out.println("Device Inquiry completed!");
synchronized(inquiryCompletedEvent){
inquiryCompletedEvent.notifyAll();
}
}
public void serviceSearchCompleted(int transID, int respCode) {
}
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
}
} // class MyDiscoveryListener
} //類RemoteDeviceDiscovery
發現如果我以超級用戶權限運行jar,則可以按預期工作:
pi @ raspberrypi〜sudo / java / bluetooth_jar $ / usr / lib / jvm / jdk-8-oracle-arm-vfp-hflt / jre / bin / java -jar bluetooth_jar.jar
輸出:
bluez上的BlueCove版本2.1.1-SNAPSHOT等待設備查詢完成...設備C4850852975B發現名稱GMSEED-PC設備查詢已完成! 找到1個設備BlueCove堆棧關閉已完成
如果我以超級用戶身份從命令行而不是通過桌面菜單項Menu | Programming | BlueJ啟動BlueJ; 即:
pi @ raspberrypi〜$須藤bluej
然后示例應用程序將提供相同的輸出。
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