Question

我已经研究了如何触发电子邮件并用数据库查询中的信息填充它，但我想将其写入CSV文件，以便我可以使用excel进行格式化（可能附加到电子邮件中）邮件，如果这是可能的话）。

下面是我的代码，它创建要发送到电子邮件的文本：

private void exportRedRiskItemsToEmail(){

    recipient = email; 

    subject.append(inspectionRef).append(" - Locators Rack Inspection Report (Red Risk Items)");

    message.append("Dear ").append(contactFirstName).append(",\r\n");
    message.append("\r\n");
    message.append("Following todays inspection, below is a list of locations which are noted as Red Risk:\r\n");

    final Cursor areasCursor = (Cursor) rmDbHelper.fetchAllAreasForInspection(inspectionId);
    if(areasCursor.moveToFirst()){
        do{
            areaId = areasCursor.getLong(areasCursor.getColumnIndex(RMDbAdapter.AREA_ID));
            areaNumber = RMUtilities.notEmpty(areasCursor.getString(areasCursor.getColumnIndex(RMDbAdapter.AREA_NUMBER)), "number unknown"); 
            areaRef = RMUtilities.notEmpty(areasCursor.getString(areasCursor.getColumnIndex(RMDbAdapter.AREA_REF)), ""); 

            if (areaRef != ""){
                areaRef = " (" + areaRef + ")";
            }
            message.append("______________________________________________________").append("\r\n");
            message.append("\r\n");
            message.append("Area ").append(areaNumber).append(areaRef).append("\r\n");
            message.append("\r\n");

        } 
        while (areasCursor.moveToNext());
    }
    areasCursor.close();
    message.append("______________________________________________________").append("\r\n");
    message.append("\r\n");
    message.append("Please fully off-load above locations (for uprights, please off-load bays either side). \r\n");
    message.append("\r\n");
    message.append("We will follow up with our full report and quotation for repairs shortly. \r\n");
    message.append("\r\n");
    message.append("In the meantime, if you have any queries, please give me a call on 07970 088845. \r\n");
    message.append("\r\n");
    message.append("Kind regards, \r\n");
    message.append("\r\n");
    message.append(inspector).append("\r\n");

    sendEmail(recipient, subject.toString(), message.toString());
}

以下是触发电子邮件的代码：

private void sendEmail(String recipient, String subject, String message) { 
    try { 
        final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
        emailIntent.setType("plain/text");
        emailIntent.setType("message/rfc822");
//      emailIntent.setType("high/priority"); //This didn't work - any way to do this though!?
        if (recipient != null)      emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{recipient}); 
        if (subject != null)        emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject); 
        if (message != null)            emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, message); 

        startActivity(Intent.createChooser(emailIntent, "Send mail...")); 

    } catch (ActivityNotFoundException e) { 
        // cannot send email for some reason 
    } 
}

任何指针都非常赞赏。

Answer 1

您可能需要查看OpenCSV库。它是免费的，开源的，易于使用。它不支持直接从SQLite DB转储，但是编写实现它的必要代码应该非常简单。 OpenCSV确实支持将对象列表写入CSV，因此如果您可以将数据从sqlite数据库中取出到List中，那么您将很高兴。

此主题也是here is a post。

OpenCSV也会写入文件。然后可以将此文件附加到电子邮件中，或者按照您的意愿使用（上传到谷歌驱动器，通过USB等转移到计算机）。

 CSVWriter writer = new CSVWriter(new FileWriter("yourfile.csv"));
 // feed in your array (or convert your data to an array)
 writer.write(entries);
 writer.close();

这只是一个片段，我现在从内存写入工作，所以它可能有点偏。您也可以在android中查找编写文件。您可以将其存储在外部存储器或应用程序存储器中。如果要从应用程序外部访问该文件，则需要将其放在外部存储器中。

Intent sendIntent = new Intent(Intent.ACTION_SEND); 
sendIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
sendIntent.putExtra(Intent.EXTRA_SUBJECT,"subject line"); 
sendIntent.putExtra(Intent.EXTRA_TEXT,"Body of email"); 
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(new File("yourfile.csv"))); 
sendIntent.setType("vnd.android.cursor.dir/email"); 

startActivity(Intent.createChooser(sendIntent,"Email:"));

如何将数据库写入CSV（Android）

1 个答案: