Android发送图片到指定邮箱（仅客户端简单实现，不需服务端配合）

概述

private static QRCodeUntil QR_CODE_UNTIL = null;

public static QRCodeUntil getInstance() {
if (QR_CODE_UNTIL == null) {
synchronized (BitmapUnit.class) {
QR_CODE_UNTIL = new QRCodeUntil();
}
}
return QR_CODE_UNTIL;
}

private static final int BLACK = 0xff000000;
/**
* 生成一个二维码图像
* 传入的字符串，通常是一个URL
* @param widthAndHeight 图像的宽高
*/
public Bitmap createQRCode(String str, int widthAndHeight) throws WriterException {
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix matrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);
int width = matrix.getWidth();
int height = matrix.getHeight();
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (matrix.get(x, y)) {
pixels[y * width + x] = BLACK;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}

/**
* 向图片添加文字
*
*/
public Bitmap addTextToBitmap(Bitmap bmpSrc, String text) {
int srcWidth = bmpSrc.getWidth();//图片宽度
int srcHeight = bmpSrc.getHeight();//图片高度

// 先计算text所需要的height
int textSize = 50;//字体大小
int padding = 3;//字间间距
int textLinePadding = 1;//行间距
int perLineWords = (srcWidth - 2 * padding) / textSize;// 每行的文字数目
int lineNum = text.length() / perLineWords;//行数
lineNum = text.length() % perLineWords == 0 ? lineNum : lineNum + 1;
int textTotalHeight = lineNum * (textSize + textLinePadding) + 2 * padding;//完整的文字的高度

Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight + textTotalHeight,
Bitmap.Config.ARGB_8888);
try {
Canvas canvas = new Canvas(bitmap);
canvas.drawColor(Color.WHITE);
canvas.drawBitmap(bmpSrc, 0, textTotalHeight, null);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setColor(Color.BLACK);
paint.setTextSize(textSize);
//            canvas.drawText(text, bitmap.getWidth()/2-textSize*text.length()/2, textTotalHeight + padding, paint);
canvas.drawText(text, (bitmap.getWidth() - ((text.length() - 2) * textSize - 25)) / 2, textTotalHeight + padding, paint);

canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
} catch (Exception e) {
bitmap = null;
e.getStackTrace();
}
return bitmap;
}

public static void saveFile(Bitmap bm, String fileName) throws IOException {
File appDir = new File(Environment.getExternalStorageDirectory(),"这边是你想要保存的本地地址");
if (!appDir.exists()) {
appDir.mkdirs();
}
String name = fileName + ".jpg";
File file = new File(appDir, name);
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String path = "/sdcard/这边加上你保存的地址";
appDir = new File(path);
if (!appDir.exists()) {
appDir.mkdirs();
}else{
Log.i("###", "saveImageToGallery: "+"该文件夹已经存在了");
}
FileOutputStream fos = new FileOutputStream(file);//开流
bm.compress(Bitmap.CompressFormat.JPEG, 20, fos);//使用compress方法压缩图片
fos.write(BitmapUnit.getInstance().getBitmaptoByte(bm));
fos.close();
}
}

public class Send2EmailUtil {

public static String username = "xxxx.com";   // 服务邮箱(from邮箱)
public static String password = "xxxxx";       // 邮箱密码
public static String senderNick = "xxxxxxx";               // 发件人昵称

private Properties props;     // 系统属性
private Session session;      // 邮件会话对象
private MimeMessage mimeMsg;   // MIME邮件对象
private Multipart mp;         // Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象

private static Send2EmailUtil instance = null;

public Send2EmailUtil() {
props = System.getProperties();
props.put("mail.smtp.auth", "true");
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.host", "smtp.mxhichina.com");// 注意，如果你是阿里的服务邮箱才用这个

props.put("mail.smtp.port", "25");
props.put("username", username);
props.put("password", password);
// 建立会话
session = Session.getDefaultInstance(props);
session.setDebug(false);
}

public static Send2EmailUtil getInstance() {
if (instance == null) {
instance = new Send2EmailUtil();
}
return instance;
}

/**
* 发送邮件
* @param from 发件人
* @param to 收件人
* @param copyto 抄送
* @param subject 主题
* @param content 内容
* @param fileList 附件列表
* @return
*/
public boolean sendMail(String from, String[] to, String[] copyto, String subject, String content, String[] fileList) {
boolean success = true;
try {
mimeMsg = new MimeMessage(session);
mp = new MimeMultipart();

// 自定义发件人昵称
String nick = "";
try {
nick = javax.mail.internet.MimeUtility.encodeText(senderNick);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
// 设置发件人
//          mimeMsg.setFrom(new InternetAddress(from));
mimeMsg.setFrom(new InternetAddress(from, nick));
// 设置收件人
if (to != null && to.length > 0) {
String toListStr = getMailList(to);
mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toListStr));
}
// 设置抄送人
if (copyto != null && copyto.length > 0) {
String ccListStr = getMailList(copyto);
mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(ccListStr));
}
// 设置主题
mimeMsg.setSubject(subject);
// 设置正文
BodyPart bp = new MimeBodyPart();
bp.setContent(content, "text/html;charset=utf-8");
mp.addBodyPart(bp);
// 设置附件
if (fileList != null && fileList.length > 0) {
for (int i = 0; i < fileList.length; i++) {
bp = new MimeBodyPart();
FileDataSource fds = new FileDataSource(fileList[i]);
bp.setDataHandler(new DataHandler(fds));
bp.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));
mp.addBodyPart(bp);
}
}
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
// 发送邮件
if (props.get("mail.smtp.auth").equals("true")) {
Transport transport = session.getTransport("smtp");
transport.connect((String)props.get("mail.smtp.host"), (String)props.get("username"), (String)props.get("password"));
//              transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.TO));
//              transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.CC));
transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients());
transport.close();
} else {
Transport.send(mimeMsg);
}
Log.e("邮件发送成功","邮件发送成功");
} catch (MessagingException e) {
e.printStackTrace();
success = false;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
success = false;
}
return success;
}

/**
* 发送邮件
* @param from 发件人
* @param to 收件人, 多个Email以英文逗号分隔
* @param cc 抄送, 多个Email以英文逗号分隔
* @param subject 主题
* @param content 内容
* @param fileList 附件列表
* @return
*/
public boolean sendMail(String from, String to, String cc, String subject, String content, String[] fileList) {
boolean success = true;
try {
mimeMsg = new MimeMessage(session);
mp = new MimeMultipart();

// 自定义发件人昵称
String nick = "";
try {
nick = javax.mail.internet.MimeUtility.encodeText(senderNick);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
// 设置发件人
//          mimeMsg.setFrom(new InternetAddress(from));
mimeMsg.setFrom(new InternetAddress(from, nick));
// 设置收件人
if (to != null && to.length() > 0) {
mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
}
// 设置抄送人
if (cc != null && cc.length() > 0) {
mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));
}
// 设置主题
mimeMsg.setSubject(subject);
// 设置正文
BodyPart bp = new MimeBodyPart();
bp.setContent(content, "application/octet-stream;charset=utf-8");
mp.addBodyPart(bp);
// 设置附件
if (fileList != null && fileList.length > 0) {
for (int i = 0; i < fileList.length; i++) {
bp = new MimeBodyPart();
FileDataSource fds = new FileDataSource(fileList[i]);
bp.setDataHandler(new DataHandler(fds));
bp.setFileName(MimeUtility.encodeText(fds.getName(), "UTF-8", "B"));
mp.addBodyPart(bp);
}
}
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
// 发送邮件
if (props.get("mail.smtp.auth").equals("true")) {
Transport transport = session.getTransport("smtp");

//                这边是服务邮箱以及密码
transport.connect((String)props.get("smtp.mxhichina.com"), (String)props.get("xxx.com"), (String)props.get("xxx"));
transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients());
transport.close();
} else {
Transport.send(mimeMsg);
}

} catch (MessagingException e) {
e.printStackTrace();
success = false;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
success = false;
}
return success;
}

public String getMailList(String[] mailArray) {
StringBuffer toList = new StringBuffer();
int length = mailArray.length;
if (mailArray != null && length < 2) {
toList.append(mailArray[0]);
} else {
for (int i = 0; i < length; i++) {
toList.append(mailArray[i]);
if (i != (length - 1)) {
toList.append(",");
}

}
}
return toList.toString();
}

public static void send(String toAddress) {
String from = username;
String[] to = {toAddress};
String[] copyto = {};
String subject = "标题";
String content = "内容";
File file = new File("你所要发的图片的位置");
File[] files = file.listFiles();
String[] fileList = new String[files.length];
if (files != null) {
int count = files.length;// 文件个数
for (int i = 0; i < count; i++) {
File file1 = files[i];
String path = file1.getPath();
fileList[i] = path;
}
Send2EmailUtil.getInstance().sendMail(from, to, copyto, subject, content, fileList);
//            发送之后删除
for (int i = 0; i < files.length; i++) {
files[i].delete();
}
}

}
}