android - 新行写入文件

Question

我正在尝试将我的应用程序日志写入文件。我创建了一个方法，将一行附加到该行的末尾。

    public static void write2Log(String s){
    StringBuilder contents = new StringBuilder();
    File root = Environment.getExternalStorageDirectory();
    File logFile = new File(root, "testWrite2file.log");

    if (root.canWrite()){               
        try {
            BufferedReader input =  new BufferedReader(new FileReader(logFile));
            String line = null;                            
            while (( line = input.readLine()) != null){
              contents.append(line);
             // contents.append(System.getProperty("line.separator"));            
        }
        input.close();
        FileWriter logWriter = new FileWriter(logFile);                  
        BufferedWriter out = new BufferedWriter(logWriter); 
        out.write(contents.toString()+"\r\n"+s);////<---HERE IS MY QUESTION
        out.close();
        }

        catch (IOException e) {
            Log.e("test", "Could not read/write file " + e.getMessage());
        }
    }
}

除新字符行外，一切正常。

我试过使用:

\r\n

System.getProperty("line.separator")

newline()

但我总是在一行中得到所有内容:(

有什么想法吗？

Answer 1

试试这个:

FileWriter logWriter = new FileWriter(logFile);                  
BufferedWriter out = new BufferedWriter(logWriter); 
out.write(contents.toString());////<---HERE IS THE CHANGE
out.newLine();
out.write(s);
out.close();