Android复制文件

来源:互联网 发布:32java玩mc很卡 编辑:程序博客网 时间:2024/06/04 19:57

转自:http://blog.csdn.net/etzmico/article/details/7786525

/**       * 复制单个文件       * @param oldPath String 原文件路径 如:c:/fqf.txt       * @param newPath String 复制后路径 如:f:/fqf.txt       * @return boolean       */      public void copyFile(String oldPath, String newPath) {          try {              int bytesum = 0;              int byteread = 0;              File oldfile = new File(oldPath);              if (oldfile.exists()) { //文件存在时                  InputStream inStream = new FileInputStream(oldPath); //读入原文件                  FileOutputStream fs = new FileOutputStream(newPath);                  byte[] buffer = new byte[1444];                  int length;                  while ( (byteread = inStream.read(buffer)) != -1) {                      bytesum += byteread; //字节数 文件大小                      System.out.println(bytesum);                      fs.write(buffer, 0, byteread);                  }                  inStream.close();              }          }          catch (Exception e) {              System.out.println("复制单个文件操作出错");              e.printStackTrace();            }        }        /**       * 复制整个文件夹内容       * @param oldPath String 原文件路径 如:c:/fqf       * @param newPath String 复制后路径 如:f:/fqf/ff       * @return boolean       */      public void copyFolder(String oldPath, String newPath) {            try {              (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹              File a=new File(oldPath);              String[] file=a.list();              File temp=null;              for (int i = 0; i < file.length; i++) {                  if(oldPath.endsWith(File.separator)){                      temp=new File(oldPath+file[i]);                  }                  else{                      temp=new File(oldPath+File.separator+file[i]);                  }                    if(temp.isFile()){                      FileInputStream input = new FileInputStream(temp);                      FileOutputStream output = new FileOutputStream(newPath + "/" +                              (temp.getName()).toString());                      byte[] b = new byte[1024 * 5];                      int len;                      while ( (len = input.read(b)) != -1) {                          output.write(b, 0, len);                      }                      output.flush();                      output.close();                      input.close();                  }                  if(temp.isDirectory()){//如果是子文件夹                      copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);                  }              }          }          catch (Exception e) {              System.out.println("复制整个文件夹内容操作出错");              e.printStackTrace();            }        }  

PS:

拷贝assets目录下文件


InputStream is = ctx.getAssets().open("test.apk");  



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