Android - 从表值生成CSV文件

Question

我有一个包含一个表的数据库,我想生成包含该表值的CSV文件.

实际上,我想将此CSV文件作为附件发送电子邮件.我知道在电子邮件中将文件作为附件发送intent(ACTION_SEND),但我不知道创建的过程或我可以创建CSV格式文件的方法.

请给我建议或想法.

Answer 1

你可以用opencsv它

从这里下载库:

http://sourceforge.net/projects/opencsv/

在这里你可以找到jar文件.

在您的活动中使用此:

CSVWriter writer = null;
try 
{
    writer = new CSVWriter(new FileWriter("/sdcard/myfile.csv"), ',');
    String[] entries = "first#second#third".split("#"); // array of your values
    writer.writeNext(entries);  
    writer.close();
} 
catch (IOException e)
{
    //error
}

Answer 2

这可能会有所帮助.我需要';' 作为游戏价值之间的分隔符.因此,请使用','生成CSV.

谢谢,Darshan

private void exportTheDB() throws IOException
{
        File myFile;  
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat("MM-dd-yyyy");
    String TimeStampDB = sdf.format(cal.getTime()); 

    try {

        myFile = new File(extStorageDirectory+"/Export_"+TimeStampDB+".csv");
        myFile.createNewFile();
        FileOutputStream fOut = new FileOutputStream(myFile);
        OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
        myOutWriter.append("Start time;End time;Elapse;Sports type");
        myOutWriter.append("\n");
        sampleDB = this.openOrCreateDatabase(DB_NAME,MODE_PRIVATE, null);

        Cursor c = sampleDB.rawQuery("SELECT * FROM  Sport_Records ", null);

        if (c != null) {
            if (c.moveToFirst()) {
                do {


                    String start_Time = c.getString(c.getColumnIndex("startTimeDate"));
                    String end_Time = c.getString(c.getColumnIndex("endTimeDate"));
                    String elapse_Time = calculateTimeDifferece(end_Time, start_Time);
                    String sport_Name = c.getString(c.getColumnIndex("label"));

                    myOutWriter.append(start_Time+";"+end_Time+";"+elapse_Time+";"+sport_Name);
                    myOutWriter.append("\n");
                }

                while (c.moveToNext());
            }

            c.close();
            myOutWriter.close();
            fOut.close();

        }
    } catch (SQLiteException se) 
    {
        Log.e(getClass().getSimpleName(),"Could not create or Open the database");
    }

    finally {

        sampleDB.close();

    }






}