【发布时间】：2012-01-04 21:39:14
【问题描述】：
我正在尝试使用 Intent 服务在后台运行以发送带有相当大 (1-2mb) 图像附件的电子邮件。我是一个初学者，到目前为止，通过在网络上研究已经学到了所有东西（所以你可能会看到一些类似的代码）。
发生的情况是，当我发送第一封电子邮件时，一切正常。但是，当我尝试在第一个仍在处理时发送另一个时，第一个被丢弃，第二个通过正常。它将始终发送最新的排队意图并跳过之前的意图。
根据我所做的研究，IntentService 应该将传递给它的意图排队，并按顺序依次执行它们。这个问题：IntentService : How to enqueue correctly? 类似，但我认为它并不完全适用于我的情况。
我确定我错过了一些愚蠢的东西 =(
这是我启动服务的 onActivityResult：
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.i(TAG, "Entered onActivityResult");
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_CANCELED) {
Log.i(TAG, "onActivityResult Canceled");
Toast toast = Toast.makeText(this,"Camera Canceled", 10000);
toast.show();
return;
}
if ((requestCode == CAMERA_PIC_REQUEST) && (resultCode == Activity.RESULT_OK)) {
Log.i(TAG, "onActivityResult Result OK");
String filePath = getOutputPath();
String order = getOrder();
Log.i(TAG, "Sending From: " + filePath);
Intent sendIntent = new Intent(this, MailIntentService.class);
sendIntent.putExtra(MailIntentService.IN_SUBJECT, order);
sendIntent.putExtra(MailIntentService.IN_PATH, filePath);
startService(sendIntent);
Toast.makeText(this, "Image Upload Started. Check Notification Bar for Status.", Toast.LENGTH_LONG).show();
}
}
这是整个 IntentService：
public class MailIntentService extends IntentService {
//These set the parameters for the Email
public static final String destEmail = "hidden";
public static final String sendEmail = "hidden";
public static final String sendPass = "hidden";
public static final String body = "GrowerLive image upload request.";
public static final String IN_SUBJECT = "insub";
public static final String IN_PATH = "inpath";
//This is the standard tag for class name
private static final String TAG = MailIntentService.class.getSimpleName();
//These set up the parameters for notifications
private NotificationManager mNotificationManager;
private Notification notifyDetails;
private int NOTIFICATION_ID;
private CharSequence contentTitle = "Bethel Upload";
private CharSequence contentText = "Image Uploading...";
private String contentTicker = "Upload Started...";
public void onCreate() {
super.onCreate();
Log.i(TAG, "MailIntentService Created");
mNotificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
notifyDetails = new Notification(R.drawable.ic_launcher, contentTicker, System.currentTimeMillis());
}
public void onDestroy() {
super.onDestroy();
File dir = new File(Environment.getExternalStorageDirectory() + "/BethelUpload");
if (dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
new File(dir, children[i]).delete();
}
}
Log.i(TAG, "MailIntentService Destroyed");
}
public MailIntentService() {
super(TAG);
}
@Override
protected void onHandleIntent(Intent intent) {
Context context = getApplicationContext();
Intent notifyIntent = new Intent(BethelUploadActivity.class.getSimpleName());
PendingIntent intentP = PendingIntent.getActivity(MailIntentService.this, 0, notifyIntent, android.content.Intent.FLAG_ACTIVITY_NEW_TASK);
notifyDetails.setLatestEventInfo(context, contentTitle, contentText, intentP);
try {
String subject = intent.getStringExtra(IN_SUBJECT);
String path = intent.getStringExtra(IN_PATH);
Log.i(TAG, "Sending Mail...");
Log.i(TAG, "Subject: " + subject);
Log.i(TAG, "Attachment Path: " + path);
mNotificationManager.notify(NOTIFICATION_ID, notifyDetails);
GMailSender sender = new GMailSender(sendEmail, sendPass);
sender.sendMail(subject, body, sendEmail, destEmail, path);
Log.i(TAG, "Mail Sent!");
contentText = "Image Uploaded Successfully";
contentTicker = "Upload Successful";
notifyDetails.setLatestEventInfo(context, contentTitle, contentText, intentP);
mNotificationManager.notify(NOTIFICATION_ID, notifyDetails);
}
catch (Exception e) {
Log.e(TAG, e.getMessage(), e);
}
}
}
这是我在另一个示例中使用的 GMailSender：Sending Email in Android using JavaMail API without using the default/built-in app
public class GMailSender extends javax.mail.Authenticator {
private String mailhost = "smtp.gmail.com";
private String user;
private String password;
private Session session;
static {
Security.addProvider(new com.provider.JSSEProvider());
}
public GMailSender(String user, String password) {
this.user = user;
this.password = password;
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", mailhost);
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");
props.setProperty("mail.smtp.quitwait", "false");
session = Session.getDefaultInstance(props, this);
}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
public synchronized void sendMail(String subject, String body, String sender, String recipients, String fileAttachment) throws Exception {
try{
MimeMessage message = new MimeMessage(session);
message.setSender(new InternetAddress(sender));
message.setSubject(subject);
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(body);
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(fileAttachment);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName("SodPhoto.jpg");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
if (recipients.indexOf(',') > 0)
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
else
message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
Transport.send(message);
}catch(Exception e){
}
}
public class ByteArrayDataSource implements DataSource {
private byte[] data;
private String type;
public ByteArrayDataSource(byte[] data, String type) {
super();
this.data = data;
this.type = type;
}
public ByteArrayDataSource(byte[] data) {
super();
this.data = data;
}
public void setType(String type) {
this.type = type;
}
public String getContentType() {
if (type == null)
return "application/octet-stream";
else
return type;
}
public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(data);
}
public String getName() {
return "ByteArrayDataSource";
}
public OutputStream getOutputStream() throws IOException {
throw new IOException("Not Supported");
}
}
}
我知道这是大量的代码/文字墙，但我想我宁愿给你太多信息也不愿太少。非常感谢您的宝贵时间！
【问题讨论】：
-
您的
GMailSender#sendMail方法正在捕获所有异常并且不打印任何内容...您可以删除 try/catch 块并查看是否发生任何异常吗？ -
你有什么异常吗？
-
@EricKraft：删除 GmailSender sendMail 方法中的 try/catch 块后，如果我没有数据信号，则会出现异常。否则（假设我确实有数据信号）我没有得到任何信号。
标签： android queue android-intent android-service intentservice