Android从文件中读取大字符串

Question

In my application, when it loads up, it makes a web call which retrieves a JSON string. I want to store this JSON string to the phone so the application won't crash if the user loses connection. JSON string is required to set the text of the application. So I am doing this

    File myDir = new File(getFilesDir().getAbsolutePath());

                FileWriter fw = new FileWriter(myDir + "/jsonMain.txt");
                fw.write(sJsonMain);
                fw.close();

And then to retrieve it I am doing this

    BufferedReader br = new BufferedReader(new FileReader(
                            myDir + "/jsonMain.txt"));
                    sStoredJSON = br.readLine();

It works fine with other JSON strings, however it is not with the Large JSON string. I checked the log and it says this

04-26 10:00:44.511: I/global(893): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.

Could someone please tell me how else I can read in a large string like this?

Thanks in advance!!

Answer 1

try this:

BufferedReader br = new BufferedReader(new FileReader(
                        myDir + "/jsonMain.txt"), 8); // or a higher value than 8
sStoredJSON = br.readLine();

Answer 2

您可以在BufferedReader 构造函数上添加缓冲区大小，因此可以使用先前的File对象来确定文件长度并相应地创建缓冲区大小。