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爲什麼每當我試圖運行它時,崩潰我的android應用程序/將電子郵件數據導入android應用程序的最佳方式是什麼?如何在Android Studio中獲取電子郵件數據?
該應用程序本身只包含一個按鈕點擊 - 我已經得到了下面的代碼在eclipse中工作,我試圖運行它在手機上,而不是一個模擬器,所以我不再收到網絡錯誤。
package com.example.marc.emailtest;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void buttonOnClick(View v){
String host = "pop.gmail.com";// change accordingly
String StoreType = "pop3";
String user = "******@gmail.com";// I purposefully hid these
String password = "********";// I purposefully hid these
try {
//create properties field
Properties properties = new Properties();
properties.put("mail.pop3.host", host);
properties.put("mail.pop3.port", "995");
properties.put("mail.pop3.starttls.enable", "true");
Session emailSession = Session.getDefaultInstance(properties);
//create the POP3 store object and connect with the pop server
Store store = emailSession.getStore("pop3s");
store.connect(host, user, password);
//create the folder object and open it
Folder emailFolder = store.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
// retrieve the messages from the folder in an array and print it
Message[] messages = emailFolder.getMessages();
System.out.println("messages.length---" + messages.length);
for (int i = 0, n = messages.length; i < n; i++) {
Message message = messages[i];
Log.i("MainActivity1", "---------------------------------");
Log.i("MainActivity1", "Email Number " + (i + 1));
Log.i("MainActivity1", "Subject: " + message.getSubject());
Log.i("MainActivity1", "From: " + message.getFrom()[0]);
Log.i("MainActivity1", "Text: " + message.getContent().toString());
}
//close the store and folder objects
emailFolder.close(false);
store.close();
} catch (NoSuchProviderException e) {
e.printStackTrace();
Log.i("MainActivity1", e.getMessage());
} catch (MessagingException e) {
e.printStackTrace();
Log.i("MainActivity1", e.getMessage());
} catch (Exception e) {
e.printStackTrace();
Log.i("MainActivity1", e.getMessage());
}
}
}
添加logcat的。 – Jens
確實會添加LogCat的輸出,這會顯示出錯。我不知道這是否由javax.mail包處理,但我的第一個猜測是,您嘗試在主線程上執行與網絡相關的事情,這在Android上是不允許的。 嘗試將其包裝到一個AsyncTask中,看看是否有效。 – JaapM
已添加logcat –