文件存储读写的工具类

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package com.example.lol.util;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import com.example.lol.constant.Constants;

import android.content.Context;

public class FileUtil {
   public static void writeFiles(String content,Context context) {
        try {
            // 打开文件获取输出流，文件不存在则自动创建
            FileOutputStream fos =context.openFileOutput(Constants.FILENAME,
                    Context.MODE_APPEND);
            fos.write(content.getBytes());
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 读取文件内容
    public static String readFiles(Context context) {
        String content = null;
        try {
            FileInputStream fis =context.openFileInput(Constants.FILENAME);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = fis.read(buffer)) != -1) {
                baos.write(buffer, 0, len);
            }
            content = baos.toString();
            fis.close();
            baos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return content;
    }
}

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