我在通过蓝牙套接字发送大文件时遇到问题.较小的文件正确传输.我相信正确传输高达161280字节.
编辑：我做了一些测试并缩小了原因.看起来
outStream.write(mybytearray, 0, mybytearray.length);
在发送代码部分不写超过161280字节.我通过不关闭套接字连接看到了这种行为,从而导致接收部分中的读取在161280字节上“阻塞”.这里的蓝牙输出流有什么问题？我究竟做错了什么？
编辑2：
这样做可以让它通过.
for(int i = 0 ; i < mybytearray.length ; i++){
outStream.write(mybytearray[i]);
}
发送代码：
try {
outStream = mBluetoothSocket.getOutputStream();
Log.d(TAG,"outStream created success!");
} catch (IOException e) {
Log.d(TAG,
"ON RESUME: Output stream creation failed.",
e);
}
File myFile = new File(file_name);
Log.d(TAG,"file /source.pdf created success!");
byte[] mybytearray = new byte[(int)myFile.length()];
Log.d(TAG,"file length() =" + (int)myFile.length());
FileInputStream fis = new FileInputStream(myFile);
Log.d(TAG,"fis created");
BufferedInputStream bis = new BufferedInputStream(fis,1272254 );
Log.d(TAG,"bis created success");
bis.read(mybytearray,0,mybytearray.length);
Log.d(TAG,"ALL Bytes read from bis");
outStream.write(mybytearray, 0, mybytearray.length);
Log.d(TAG,"BYTES WRITTEN to OUTSTREAM of socket");
outStream.flush();
Log.d(TAG,"bytes flushed");
outStream.close();
收货代码：
// Attach the i/p stream to the socket
try {
InputStream in = socket.getInputStream();
mIn = in;
Log.d(TAG, "input stream acquired");
} catch (IOException e1) {
e1.printStackTrace();
}
// Create output streams & write to file
FileOutputStream fos = new FileOutputStream(
Environment.getExternalStorageDirectory()
+ "/copy.pdf");
try {
bytesRead = mIn.read(buffer, 0, buffer.length);
Log.d(TAG, "bytesRead first time =" + bytesRead);
current = bytesRead;
do {
Log.d(TAG, "do-while -- current: " + current);
bytesRead = mIn.read(buffer, current,
buffer.length - current);
Log.d(TAG, "bytesRead: =" + bytesRead);
if (bytesRead >= 0)
current += bytesRead;
} while (bytesRead > -1);
} catch (IOException e) {
e.printStackTrace();
Log.d(TAG, "do while end:-- buffer len= "
+ buffer.length + " current: " + current);
fos.write(buffer);
Log.d(TAG, "fos.write success! buffer: "
+ buffer.length + " current: " + current);
fos.flush();
fos.close();
}
}
socket.close();
logcat的：
D/ReceiveService( 5761): do-while -- current: 155232
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 156240
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 157248
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 158256
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 159264
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 160272
D/ReceiveService( 5761): bytesRead: =1008
D/ReceiveService( 5761): do-while -- current: 161280
W/System.err( 5761): java.io.IOException: Software caused connection abort
W/System.err( 5761): at android.bluetooth.BluetoothSocket.readNative(Native Method)
W/System.err( 5761): at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:307)
W/System.err( 5761): at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
W/System.err( 5761): at com.bt.server.ReceiveService$AcceptThread.run(ReceiveService.java:141)
我正在使用摩托罗拉里程碑. Android 2.1
