我正在编写服务器 - 客户端应用程序,当从服务器向设备传输一首歌作为二进制字节数组时,我遇到了问题。
我使用的代码是下一个:
int bytesRead = 0;
FileOutputStream fos = new FileOutputStream(file);
DataOutputStream dosToFile = new DataOutputStream(fos);
long totalBytesWritten = 0;
byte[] buffer = new byte[5024];
do {
bytesRead = dis.read(buffer, 0, 5024);
if ( bytesRead > 0) {
dosToFile.write(buffer, 0, bytesRead);
dosToFile.flush();
totalBytesWritten += bytesRead;
Log.e("", "Total Bytes written = "+ totalBytesWritten);
} else if ( bytesRead == 0 ) {
Log.e("","Zero bytes readed when downloading song.");
} else if ( bytesRead == -1 ) {
Log.e("","Read returned -1 when downloading song.");
}
} while ( bytesRead > -1 );
问题出现在已下载歌曲时。在上一次读取中,在读完歌曲的最后几个字节(并将它们写入sdcard)后,应用程序在读取时冻结,并且不会返回假定的-1。
代码显示错误了吗?我应该以其他方式进行转移吗?
我用这段代码发送我的二进制数据:
byte [] mybytearray = new byte [(int)myFile.length()];
mybytearray = this.fileToByteArray(myFile);
if ( mybytearray != null ) {
dos.write(mybytearray, 0, mybytearray.length);
dos.flush();
System.out.println("Song send.");
} else {
System.out.println("The song could not be send.");
}
非常感谢。
答案 0 :(得分:0)
试试这个:
int read = nis.read(buffer, 0, 4096); // This is blocking
while (read != -1) {
byte[] tempdata = new byte[read];
System.arraycopy(buffer, 0, tempdata, 0, read);
// Log.i(NTAG, "Got data: " + new String(tempdata));
handler.sendMessage(handler.obtainMessage(MSG_NETWORK_GOT_DATA, tempdata));
read = nis.read(buffer, 0, 4096); // This is blocking
}
处理程序只是我发送要解析(或写入文件)的消息的方式。你可以在这做任何事情。当它完成读取刚刚完成的读取时,无需在循环内进行检查。您可以捕获诸如SocketTimeoutException等异常,以确定问题所在。
答案 1 :(得分:0)
解决方案:
int bytesRead = 0;
FileOutputStream fos = new FileOutputStream(file);
DataOutputStream dosToFile = new DataOutputStream(fos);
long totalBytesWritten = 0;
byte[] buffer = new byte[5024]; // 8Kb
do {
bytesRead = dis.read(buffer, 0, 5024);
if ( bytesRead > 0) {
dosToFile.write(buffer, 0, bytesRead);
dosToFile.flush();
totalBytesWritten += bytesRead; //Se acumula el numero de bytes escritos en el fichero
} else if ( bytesRead == 0 ) {
Log.e("","Zero bytes readed when downloading song.");
} else if ( bytesRead == -1 ) {
Log.e("","Read returned -1 when downloading song.");
}
if ( totalBytesWritten == fileLength ) break;
} while ( bytesRead > -1 );