java - Android Studio VerifyError 拒绝来自 JavaMail API 的类 text_plain

Question

我正在开发一个应用程序，允许用户通过发送电子邮件与我联系(用户只输入消息，发件人和收件人电子邮件都是我的)。我正在尝试使用 JavaMail API 用 gmail 实现这一点。但是，我在 Transport.send(mimeMessage) 处不断收到此错误。线。
以下是错误消息:

Caused by: java.lang.VerifyError: Rejecting class com.sun.mail.handlers.text_plain that attempts to sub-type erroneous class com.sun.mail.handlers.handler_base (declaration of 'com.sun.mail.handlers.text_plain' appears in /data/app/~~T_TRkO9R_v9j4iEdr4K9Yg==/com.example.compusec-dPeAL8DtGJvU45dJpt8xxA==/base.apk)

Caused by: java.lang.VerifyError: Verifier rejected class com.sun.mail.handlers.handler_base: java.awt.datatransfer.DataFlavor[] com.sun.mail.handlers.handler_base.getTransferDataFlavors() failed to verify: java.awt.datatransfer.DataFlavor[] com.sun.mail.handlers.handler_base.getTransferDataFlavors(): [0x4] can't resolve returned type 'Unresolved Reference: java.awt.datatransfer.DataFlavor[]' or 'Reference: javax.activation.ActivationDataFlavor[]' (declaration of 'com.sun.mail.handlers.handler_base' appears in /data/app/~~T_TRkO9R_v9j4iEdr4K9Yg==/com.example.compusec-dPeAL8DtGJvU45dJpt8xxA==/base.apk)

这是我的代码:

    protected Void doInBackground(Void... voids) {
        Properties properties = new Properties();
        properties.put("mail.smtp.host", "smtp.gmail.com");
        properties.put("mail.smtp.socketFactory.port", "465");
        properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.port", "465");

        session = javax.mail.Session.getInstance(properties, new javax.mail.Authenticator(){
            protected PasswordAuthentication getPasswordAuthentication(){
                return new PasswordAuthentication("sender@gmail.com","senderpass");
            }
        });

        session.setDebug(true);

        MimeMessage mimeMessage = new MimeMessage(session);
        try {
            mimeMessage.setFrom(new InternetAddress("sender@gmail.com"));
            mimeMessage.addRecipients(Message.RecipientType.TO, String.valueOf(new InternetAddress(email)));
            mimeMessage.setSubject(subject);
            mimeMessage.setText(message);
            Transport.send(mimeMessage);
        } catch (MessagingException e) {
            e.printStackTrace();
        }

        return null;
    }

和 gradle 脚本:

plugins {
    id 'com.android.application'
}

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.2"

    packagingOptions {
        pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
    }

    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 23
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

repositories {
    jcenter()
    maven {
        url "https://maven.java.net/content/groups/public/"
    }
}

dependencies {

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'com.google.android.material:material:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    compile 'com.sun.mail:android-mail:1.6.2'
    compile 'com.sun.mail:android-activation:1.6.2'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Answer 1

在 build.gradle 中使用它:

android {
    ...
    packagingOptions {
        exclude 'META-INF/NOTICE.md'
        exclude 'META-INF/LICENSE.md'
    }
}

dependencies {
    implementation 'com.sun.mail:android-mail:1.6.6'
    implementation 'com.sun.mail:android-activation:1.6.6'
    ...
}

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