Javamail getContent() 致命错误 java.lang.NoClassDefFoundError
Javamail getContent() fatal error java.lang.NoClassDefFoundError
我正在尝试制作一个应用程序来 "simply" 阅读纯文本电子邮件(而且只有纯文本。我发送了电子邮件,所以我知道它只是纯文本)。
我在这里和那里拿起代码来做。
我终于成功地阅读了 "from" "subject" "sentDate" 和其他,但没有 "content"。这是我想阅读的内容...
一切正常,但是当我调用 getContent() 时,我遇到了一个致命错误。
我在 app\libs.
中使用 javax.mail.jar = javamail 1.6.2
我试过 mail.jar 和 activation.jar,但没有用。
我试图将所有阅读代码放入 "void" 中,但没有用。
即使打字
Object content = message.getContent();
没用...
在清单中,我有
<uses-permission android:name="android.permission.INTERNET" />
在 build.graddle(模块应用程序)中我有
compile files('libs/javax.mail.jar')
mainActivity.java:
package myName.myAPP;
import android.os.StrictMode;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String msg = "";
String from;
String subject;
String sentDate;
String contentType
// -----------------------------------------------StricMode ERROR--------------------------------------
// Ces deux lignes sont à ajouter si l'on veut éviter une erreur:
// at android.os.strictmode$androidblockguardpolicy.onnetwork
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
// -----------------------------------------------StricMode ERROR--------------------------------------
Properties connectionProperties = new Properties();
Session session = Session.getDefaultInstance(connectionProperties,null);
try {
Store store = session.getStore("pop3");
store.connect("pop.free.fr", "user", "password");
Folder folderInbox = store.getFolder("Inbox");
folderInbox.open(Folder.READ_ONLY);
Message messages[] = folderInbox.getMessages();
for (int i = 0; i < messages.length; i++) {
Message message = messages[i];
Address[] fromAddress = message.getFrom();
from = fromAddress[0].toString();
subject = message.getSubject();
sentDate = message.getSentDate().toString();
contentType = message.getContentType();
String content = message.getContent().toString();
msg = msg + from + subject + sentDate + contentType + " %%%%% ";
}
folderInbox.close(false);
store.close();
((TextView)findViewById(R.id.MsgContent)).setText(msg);
}catch (Exception e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String trace = sw.toString();
((TextView)findViewById(R.id.MsgContent)).setText(trace);
}
}
}
运行 时,应用程序崩溃。
logcat 如下(当 GenyMotion 上的 运行 时):
07-02 00:08:29.031 2419-2419/myName.myAPP E/AndroidRuntime: FATAL EXCEPTION: main
Process: myName.myAPP, PID: 2419
java.lang.NoClassDefFoundError: javax.mail.internet.MimeBodyPart$MimePartDataHandler
at javax.mail.internet.MimeMessage.getDataHandler(MimeMessage.java:1475)
at javax.mail.internet.MimeMessage.getContent(MimeMessage.java:1508)
at myName.myAPP.MainActivity.onCreate(MainActivity.java:69)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
07-02 00:08:35.380 2419-2431/myName.myAPP E/System: Uncaught exception thrown by finalizer
07-02 00:08:35.381 2419-2431/myName.myAPP E/System: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.net.Socket.close()' on a null object reference
at com.sun.mail.pop3.Protocol.close(Protocol.java:382)
at com.sun.mail.pop3.POP3Folder.close(POP3Folder.java:296)
at com.sun.mail.pop3.POP3Folder.finalize(POP3Folder.java:576)
at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:191)
at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:174)
at java.lang.Thread.run(Thread.java:818)
[ 07-02 00:08:36.272 81: 81 D/ ]
Socket deconnection
[ 07-02 00:08:38.284 81: 81 D/ ]
Socket deconnection
[ 07-02 00:08:40.297 81: 81 D/ ]
Socket deconnection
我查过了。 javax.mail.internet.MimeBodyPart$MimePartDataHandler
在 javax.mail.jar
我迷路了。
需要帮助才能继续。
希望我的英语比 java 好。
天堂存在。
为了解决问题,"javax.mail.jar"不能编译,但是PROVIDED.
Build.gradle(module:app) 如图:
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
packagingOptions {
pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
}
defaultConfig {
applicationId "myNam.myAPP"
minSdkVersion 18
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
repositories {
jcenter()
maven {
url "https://maven.java.net/content/groups/public/"
}
}
dependencies {
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.1'
compile 'com.sun.mail:android-mail:1.6.2'
compile 'com.sun.mail:android-activation:1.6.2'
provided files('libs/javax.mail.jar')
}
重要的几行是:
packagingOptions {
pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
}
repositories {
jcenter()
maven {
url "https://maven.java.net/content/groups/public/"
}
dependencies {
compile 'com.sun.mail:android-mail:1.6.2'
compile 'com.sun.mail:android-activation:1.6.2'
provided files('libs/javax.mail.jar')
}
这样就完美了。
绝望哭泣的一周
非常感谢。
我正在尝试制作一个应用程序来 "simply" 阅读纯文本电子邮件(而且只有纯文本。我发送了电子邮件,所以我知道它只是纯文本)。
我在这里和那里拿起代码来做。
我终于成功地阅读了 "from" "subject" "sentDate" 和其他,但没有 "content"。这是我想阅读的内容...
一切正常,但是当我调用 getContent() 时,我遇到了一个致命错误。
我在 app\libs.
中使用 javax.mail.jar = javamail 1.6.2
我试过 mail.jar 和 activation.jar,但没有用。
我试图将所有阅读代码放入 "void" 中,但没有用。
即使打字
Object content = message.getContent();
没用...
在清单中,我有
<uses-permission android:name="android.permission.INTERNET" />
在 build.graddle(模块应用程序)中我有
compile files('libs/javax.mail.jar')
mainActivity.java:
package myName.myAPP;
import android.os.StrictMode;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Store;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String msg = "";
String from;
String subject;
String sentDate;
String contentType
// -----------------------------------------------StricMode ERROR--------------------------------------
// Ces deux lignes sont à ajouter si l'on veut éviter une erreur:
// at android.os.strictmode$androidblockguardpolicy.onnetwork
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
// -----------------------------------------------StricMode ERROR--------------------------------------
Properties connectionProperties = new Properties();
Session session = Session.getDefaultInstance(connectionProperties,null);
try {
Store store = session.getStore("pop3");
store.connect("pop.free.fr", "user", "password");
Folder folderInbox = store.getFolder("Inbox");
folderInbox.open(Folder.READ_ONLY);
Message messages[] = folderInbox.getMessages();
for (int i = 0; i < messages.length; i++) {
Message message = messages[i];
Address[] fromAddress = message.getFrom();
from = fromAddress[0].toString();
subject = message.getSubject();
sentDate = message.getSentDate().toString();
contentType = message.getContentType();
String content = message.getContent().toString();
msg = msg + from + subject + sentDate + contentType + " %%%%% ";
}
folderInbox.close(false);
store.close();
((TextView)findViewById(R.id.MsgContent)).setText(msg);
}catch (Exception e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String trace = sw.toString();
((TextView)findViewById(R.id.MsgContent)).setText(trace);
}
}
}
运行 时,应用程序崩溃。 logcat 如下(当 GenyMotion 上的 运行 时):
07-02 00:08:29.031 2419-2419/myName.myAPP E/AndroidRuntime: FATAL EXCEPTION: main
Process: myName.myAPP, PID: 2419
java.lang.NoClassDefFoundError: javax.mail.internet.MimeBodyPart$MimePartDataHandler
at javax.mail.internet.MimeMessage.getDataHandler(MimeMessage.java:1475)
at javax.mail.internet.MimeMessage.getContent(MimeMessage.java:1508)
at myName.myAPP.MainActivity.onCreate(MainActivity.java:69)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
07-02 00:08:35.380 2419-2431/myName.myAPP E/System: Uncaught exception thrown by finalizer
07-02 00:08:35.381 2419-2431/myName.myAPP E/System: java.lang.NullPointerException: Attempt to invoke virtual method 'void java.net.Socket.close()' on a null object reference
at com.sun.mail.pop3.Protocol.close(Protocol.java:382)
at com.sun.mail.pop3.POP3Folder.close(POP3Folder.java:296)
at com.sun.mail.pop3.POP3Folder.finalize(POP3Folder.java:576)
at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:191)
at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:174)
at java.lang.Thread.run(Thread.java:818)
[ 07-02 00:08:36.272 81: 81 D/ ]
Socket deconnection
[ 07-02 00:08:38.284 81: 81 D/ ]
Socket deconnection
[ 07-02 00:08:40.297 81: 81 D/ ]
Socket deconnection
我查过了。 javax.mail.internet.MimeBodyPart$MimePartDataHandler
在 javax.mail.jar
我迷路了。 需要帮助才能继续。
希望我的英语比 java 好。
天堂存在。
为了解决问题,"javax.mail.jar"不能编译,但是PROVIDED.
Build.gradle(module:app) 如图:
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
packagingOptions {
pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
}
defaultConfig {
applicationId "myNam.myAPP"
minSdkVersion 18
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
repositories {
jcenter()
maven {
url "https://maven.java.net/content/groups/public/"
}
}
dependencies {
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.1'
compile 'com.sun.mail:android-mail:1.6.2'
compile 'com.sun.mail:android-activation:1.6.2'
provided files('libs/javax.mail.jar')
}
重要的几行是:
packagingOptions {
pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
}
repositories {
jcenter()
maven {
url "https://maven.java.net/content/groups/public/"
}
dependencies {
compile 'com.sun.mail:android-mail:1.6.2'
compile 'com.sun.mail:android-activation:1.6.2'
provided files('libs/javax.mail.jar')
}
这样就完美了。
绝望哭泣的一周
非常感谢。