【发布时间】:2019-01-03 11:46:41
【问题描述】:
我正在开发一种日志记录功能,其中我将记录文本添加到队列中,然后将日志写入文件。写法如下:
private void writeLogs(File logFile, String logText) {
try {
if (logFile == null || !logFile.exists() || logText == null || logText.isEmpty()) {
return;
}
synchronized (lock) {
BufferedWriter buf = null;
FileOutputStream fos = null;
if (megabytesAvailable(logFile) > 5) {
try {
buf = new BufferedWriter(new FileWriter(logFile, true));
buf.append(logText);
Log.e("writeLogs", logText);
buf.append("\r\n");
//buf.newLine();
} catch (Exception e) {
Log.e("writeLog", "e", e);
} finally {
buf.flush();
buf.close();
}
}
}
} catch (Exception ex) {
Log.e("writeLogs1","E",ex);
}
}
它工作了一段时间,然后突然停止写入文件。 最后打印的日志总是发送原始文本的一半。 SO中的所有问题都指向“冲洗”,但正如您所见,我已经冲洗了作家。我错过了什么?将文本添加到队列的方法和writeLogs 的调用方法是同步的。起初我认为这与线程死锁有关,但系统每次都会打印log.e,这意味着缓冲写入获取文本但无法写入。有什么帮助吗?
这是打印文件内容的方法:
public void printLogFileContent(){ /** Only for testing purpose **/
BufferedReader br = null;
try {
br = new BufferedReader(new FileReader(logFile.getAbsolutePath()));
StringBuilder sb = new StringBuilder();
String line = br.readLine();
while (line != null) {
sb.append(line);
sb.append("\n");
line = br.readLine();
}
Log.e("printLogFileContent",sb.toString());
} catch (FileNotFoundException e) {
Log.e("FileNoF","E",e);
} catch (IOException e) {
Log.e("IOE","E",e);
} finally {
try {
br.close();
} catch (IOException e) {
Log.e("IOE2","E",e);
}
}
}
【问题讨论】:
标签: android thread-safety java-io bufferedwriter