来自R.raw的java Android文件阅读器。文件

Question

真正的新手问题：

我有一本书。我需要读取的csv文件。我把它放在原始文件夹里了。为了方便起见，我正在使用http://opencsv.sourceforge.net/库读取文件。该库提供此方法来创建CSVReader对象：

CSVReader reader = new CSVReader(new FileReader("yourfile.csv"));

但是我不知道如何将这个构造函数指向我的文件，因为Android中的文件通常像R.raw一样被引用。文件，而不是文件的字符串地址

任何帮助都将不胜感激

Answer 1

你想做这样的事-

public void readCSVFromRawResource(Context context)
{
    //this requires there to be a dictionary.csv file in the raw directory
    //in this case you can swap in whatever you want
    InputStream inputStream = getResources().openRawResource(R.raw.dictionary);
    BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

    try
    {
       String word;//word
       int primaryKey = 0;//primary key
       Map dictionaryHash = new HashMap();

       while ((word = reader.readLine()) != null)
       {
           if(word.length() < 7)
           {
               dictionaryHash.put(primaryKey,word );
               primaryKey++;



               if(primaryKey % 1000 == 0)
                   Log.v("Percent load completed ", " " + primaryKey);
           }
       }

        //write the dictionary to a file
        File file = new File(DICTIONARY_FILE_NAME);
        BufferedOutputStream fos = new BufferedOutputStream(new FileOutputStream(DICTIONARY_FILE_NAME));
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(dictionaryHash);
        oos.flush();
        oos.close();
                 Log.v("alldone","done");

   }
   catch (Exception ex) {
       // handle exception
       Log.v(ex.getMessage(), "message");
   }
   finally
    {
       try
       {
           inputStream.close();

       }
       catch (IOException e) {
           // handle exception
          Log.v(e.getMessage(), "message");
       }
   }
}

Answer 2

您可以使用此解决方案从原始资源获取字符串： Android read text raw resource file

然后在CSVReader构造函数中使用StringReader而不是FileReader