android exporting to csv and sending as email attachment-ThrowExceptions

Exception or error:

I have seen multiple threads in this site discussing about sending email with attachments in android. I tried every methods discussed here, here and here.

I am creating a csv file via code and saving this file to android internal storage. Then I want to send this file as attachment in an email. Well, the email is being sent, I am getting it without attachment. This is what I have done.

String columnString         =   "\"Person\",\"Gender\",\"Street1\",\"PostOfice\",\"Age\"";
String dataString           =   "\"" + currentUser.userName +"\",\"" + currentUser.gender + "\",\"" + currentUser.street1 + "\",\"" + currentUser.poNumber.toString() + "\",\"" + currentUser.age.toString() + "\"";
String combinedString       =   columnString + "\n" + dataString;
File file                   =   new File(this.getCacheDir()+ File.separator + "Data.csv");
try {
    FileOutputStream out    =   new FileOutputStream(file);
    out.write(combinedString.getBytes());
    out.close();
} catch (IOException e) {
    Log.e("BROKEN", "Could not write file " + e.getMessage());
}   
Uri u1                      =   Uri.fromFile(file);

Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_SUBJECT, "Person Details");
sendIntent.putExtra(Intent.EXTRA_STREAM, u1);
sendIntent.setType("text/richtext");
startActivity(sendIntent);

I tried changing mime settings to “text/html” and “text/richtext” etc. But no luck yet. Can anyone tell me what I am doing wrong?

How to solve:

Thanks for everyone who tried to help..After taking a full day I have send an email from my app with attachment..This is the working code..

String columnString =   "\"PersonName\",\"Gender\",\"Street1\",\"postOffice\",\"Age\"";
String dataString   =   "\"" + currentUser.userName +"\",\"" + currentUser.gender + "\",\"" + currentUser.street1 + "\",\"" + currentUser.postOFfice.toString()+ "\",\"" + currentUser.age.toString() + "\"";
String combinedString = columnString + "\n" + dataString;

File file   = null;
File root   = Environment.getExternalStorageDirectory();
if (root.canWrite()){
    File dir    =   new File (root.getAbsolutePath() + "/PersonData");
     dir.mkdirs();
     file   =   new File(dir, "Data.csv");
     FileOutputStream out   =   null;
    try {
        out = new FileOutputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        try {
            out.write(combinedString.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
Uri u1  =   null;
u1  =   Uri.fromFile(file);

Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_SUBJECT, "Person Details");
sendIntent.putExtra(Intent.EXTRA_STREAM, u1);
sendIntent.setType("text/html");
startActivity(sendIntent);

Also If you have mounted your phone SDCard in the machine , this code wont work. Only one can access SDCard at one time. So in that case unmount your SDCard from computer and try..Thanks to the guy who answered here..Also make sure you have bought permission to write to external Storage in your manifest file…

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

Hope it helps someone…Thanks for everyone who tried to help..

###

This Code will help you out

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    buttonSend = (Button) findViewById(R.id.buttonSend);

    textTo = (EditText) findViewById(R.id.editTextTo);
    textSubject = (EditText) findViewById(R.id.editTextSubject);
    textMessage = (EditText) findViewById(R.id.editTextMessage);

    buttonSend.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {

            String to = textTo.getText().toString();
            String subject = textSubject.getText().toString();
            String message = textMessage.getText().toString();

            Intent i = new Intent(Intent.ACTION_SEND);
            i.setType("plain/text");
            File data = null;
            try {
                Date dateVal = new Date();
                String filename = dateVal.toString();
                data = File.createTempFile("Report", ".csv");
                FileWriter out = (FileWriter) GenerateCsv.generateCsvFile(
                        data, "Name,Data1");
                i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(data));
                i.putExtra(Intent.EXTRA_EMAIL, new String[] { to });
                i.putExtra(Intent.EXTRA_SUBJECT, subject);
                i.putExtra(Intent.EXTRA_TEXT, message);
                startActivity(Intent.createChooser(i, "E-mail"));

            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    });
}

public class GenerateCsv {
    public static FileWriter generateCsvFile(File sFileName,String fileContent) {
        FileWriter writer = null;

        try {
            writer = new FileWriter(sFileName);
            writer.append(fileContent);
                         writer.flush();

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally
        {
            try {
                writer.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return writer;
    }
}

Add this line in AndroidManifest.xml file:

  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission

###

Try

sendIntent.setType("message/rfc822");

###

For internal storage files, you need to make the file readable:

shareFile.setReadable(true, false);

###

Here is the code for attachment of csv file in mail (Its working code):
MyCsvFile.csv” should be present in your Internal/External memory of phone.

For More Look into this :https://stackoverflow.com/a/48643905/8448886

Below is the code for attachment of csv file into mail :

String csv = (Environment.getExternalStorageDirectory().getAbsolutePath() + "/MyCsvFile.csv"); // Here csv file name is MyCsvFile.csv


button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent emailIntent = new Intent(Intent.ACTION_SEND);
                emailIntent.setType("text/plain");
                emailIntent.putExtra(Intent.EXTRA_EMAIL, new String[]{"email@example.com"});
                emailIntent.putExtra(Intent.EXTRA_SUBJECT, "subject here");
                emailIntent.putExtra(Intent.EXTRA_TEXT, "body text");

                File file = new File(csv);
                Uri uri = Uri.fromFile(file);
                emailIntent.putExtra(Intent.EXTRA_STREAM, uri);
                startActivity(Intent.createChooser(emailIntent, "Pick an Email provider"));
            }
        });

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