Question

我试过这个link通过Android 3.2发送电子邮件，但是我收到了这个错误：

01-11 13:48:59.818: E/MailApp(29958): Could not send email
01-11 13:48:59.818: E/MailApp(29958): android.os.NetworkOnMainThreadException
01-11 13:48:59.818: E/MailApp(29958): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1084)
01-11 13:48:59.818: E/MailApp(29958): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
01-11 13:48:59.818: E/MailApp(29958): at java.net.InetAddress.getLocalHost(InetAddress.java:371)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.internet.InternetAddress.getLocalAddress(InternetAddress.java:517)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.internet.UniqueValue.getUniqueMessageIDValue(UniqueValue.java:99)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.internet.MimeMessage.updateMessageID(MimeMessage.java:2054)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2076)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2042)
01-11 13:48:59.818: E/MailApp(29958): at javax.mail.Transport.send(Transport.java:117)
01-11 13:48:59.818: E/MailApp(29958): at com.fahadalawam.kwtresturant.Mail.send(Mail.java:125)
01-11 13:48:59.818: E/MailApp(29958): at com.fahadalawam.kwtresturant.Add$1.onClick(Add.java:58)
01-11 13:48:59.818: E/MailApp(29958): at android.view.View.performClick(View.java:3480)
01-11 13:48:59.818: E/MailApp(29958): at android.view.View$PerformClick.run(View.java:13983)
01-11 13:48:59.818: E/MailApp(29958): at android.os.Handler.handleCallback(Handler.java:605)
01-11 13:48:59.818: E/MailApp(29958): at android.os.Handler.dispatchMessage(Handler.java:92)
01-11 13:48:59.818: E/MailApp(29958): at android.os.Looper.loop(Looper.java:137)
01-11 13:48:59.818: E/MailApp(29958): at android.app.ActivityThread.main(ActivityThread.java:4340)
01-11 13:48:59.818: E/MailApp(29958): at java.lang.reflect.Method.invokeNative(Native Method)
01-11 13:48:59.818: E/MailApp(29958): at java.lang.reflect.Method.invoke(Method.java:511)
01-11 13:48:59.818: E/MailApp(29958): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-11 13:48:59.818: E/MailApp(29958): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-11 13:48:59.818: E/MailApp(29958): at dalvik.system.NativeStart.main(Native Method)

Answer 1

 android.os.NetworkOnMainThreadException

那里有你的答案。您正尝试在主UI线程中访问网络。这是不好的！有关如何避免此问题的指导，请参阅this article。

您链接到的文章是通过在单击处理程序中调用send()方法设置错误示例。您可能需要联系该页面的作者以指出问题。

Answer 2

您正尝试在主线程上执行与网络相关的操作!! Android 3.0以上版本根本不允许这样做，作为制作更好的行为和响应式应用程序的一步（旧版本只是发出了警告）。请参阅stackTrace中的这一行

android.os.NetworkOnMainThreadException

因此，您需要将电子邮件发送部分从主线程推出。在您所遵循的示例中，不需要AsyncTask，只需要一个简单的线程。

Runnable r = new Runnable() {

        @Override
        public void run() {
              // send email 
                    Transport.send(msg); 

        }
    };
        Thread t = new Thread(r);
        t.start();

无法在Android 3.2上发送电子邮件

2 个答案: