我正在尝试使用以下来源制作文件传输蓝牙应用程序:
http://developer.android.com/guide/topics/connectivity/bluetooth.html
https://android.googlesource.com/platform/development/+/25b6aed7b2e01ce7bdc0dfa1a79eaf009ad178fe/samples/BluetoothChat/
当我尝试使用inputStream.read()方法以这种方式获取inputStream字节时:
public class ConnectedThread extends Thread {...(some code here)public voID run(){ byte[] buffer = new byte[1024]; int bytes = -1; //Keep Listening to the inputStream while connected while (true){ try { bytes = this.mmInStream.read(buffer); //* this part is not reached if (bytes==-1){ Log.d("NoData:","-1"); } } catch(Exception e){ Log.d("inStream exception:",e.getMessage()); break; } } }...(some code here)}
永远不会到达代码的下一部分(在这种情况下为“if”部分),也不会出现Log.D调试输出或我放入的其他任何内容.我刚从LogCat收到此消息:
BluetoothSocket read in: androID.net.LocalStocketImpl$SocketinputStream@f7e b08 len: 1024
要将数据从客户端传输到服务器,我这样做:
public class MainActivity extends Activity {...(some code here)@OverrIDeprotected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.activity_main); clIEntConnect(); //serverConnect();}...(some code here)public voID clIEntConnect(){ Set<BluetoothDevice> devices; devices = bConfig.getPairedDevices(); if (devices == null){ return; } if (devices.size() > 0) { BluetoothDevice device = devices.iterator().next(); ConnectThread connectTransmit = new ConnectThread(device,bConfig.getBluetoothAdapter(),BluetoothConfig.mUUID); connectTransmit.start(); Toast.makeText(this, "connected", Toast.LENGTH_SHORT).show(); socket = connectTransmit.mmSocket; ConnectedThread connectedThread = new ConnectedThread(socket); //write file bytes to the connected thread, so the thread can receive its own input written bytes later file file_to_transfer = new file(Environment.getExternalStorageDirectory() + "/txtTransfer.txt"); //get bytes from our file int size = (int) file_to_transfer.length(); byte[] bytes = new byte[size]; try { //14b are read succesfully, the whole text file BufferedinputStream buf = new BufferedinputStream(new fileinputStream(file_to_transfer)); buf.read(bytes,0,bytes.length); buf.close(); }catch (fileNotFoundException e){ Log.d("fileNotFoundException:",e.getMessage()); }catch (IOException e){ Log.d("IOException:",e.getMessage()); } //send the data to the server connectedThread.start(); connectedThread.write(bytes); //connectedThread.cancel(); } }...(some code here)}
AcceptThread(实现的服务器部分)工作,因为当我运行客户端部分连接然后传输数据时,在设备中进行调试时,服务器部分上的LogCat激活并到达线程的run方法,我调用ConnectedThread实现,但之后“显然”读取字节但它在LogCat上卡住而没有错误.
请让我知道如何完成读取字节以移动到流程的下一部分.
谢谢
解决方法:
您被阻止等待更多输入.
在流结束测试之后,标记为…的部分(这里的一些代码)应该在读取循环内.注意如果read()返回-1并不表示“没有数据”,则表示流结束,您应该关闭套接字并中断读取循环.否则,您应该继续处理您刚读过的数据.目前你只是读取并忽略所有输入,直到流结束,这是没有意义的.充其量只能处理最后一个部分缓冲区,你不知道它有多长.
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