错误：
您上传了一个APK或Android App Bundle，其中包含带有Intent过滤器的Activity、Activity别名、服务或广播接收器，但未设置“android：exported”属性。此文件无法安装在Android 12或更高版本上。请参阅：developer.android.com/about/versions/12/behavior-changes-12#exported
AndroidManifest.xml文件：

<?xml version="1.0" encoding="utf-8" standalone="no"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" android:compileSdkVersion="23" android:compileSdkVersionCodename="6.0-2438415" android:hardwareAccelerated="true" package="com.easternit.ec" platformBuildVersionCode="23" platformBuildVersionName="6.0-2438415">
<supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:resizeable="true" android:smallScreens="true" android:xlargeScreens="true"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE"/>
<permission android:name="com.easternit.ec.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
<uses-permission android:name="com.easternit.ec.permission.C2D_MESSAGE"/>
<application android:hardwareAccelerated="true" android:icon="@mipmap/icon" android:label="@string/app_name" android:networkSecurityConfig="@xml/network_security_config" android:supportsRtl="true">
    <activity android:configChanges="keyboard|keyboardHidden|locale|orientation|screenSize" android:label="@string/activity_name" android:launchMode="singleTop" android:name="com.easternit.ec.MainActivity" android:theme="@android:style/Theme.DeviceDefault.NoActionBar" android:windowSoftInputMode="adjustResize">
        <intent-filter android:label="@string/launcher_name">
            <action android:name="android.intent.action.MAIN"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>
    <provider android:authorities="com.easternit.ec.DocumentViewerPlugin.fileprovider" android:exported="false" android:grantUriPermissions="true" android:name="de.sitewaerts.cordova.documentviewer.FileProvider">
        <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/documentviewer_file_paths"/>
    </provider>
    <activity android:exported="true" android:launchMode="singleTop" android:name="com.gae.scaffolder.plugin.FCMPluginActivity">
        <intent-filter>
            <action android:name="FCM_PLUGIN_ACTIVITY"/>
            <category android:name="android.intent.category.DEFAULT"/>
        </intent-filter>
    </activity>
    <service android:name="com.gae.scaffolder.plugin.MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>
    <service android:name="com.gae.scaffolder.plugin.MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>
    <provider android:authorities="com.easternit.ec.opener.provider" android:exported="false" android:grantUriPermissions="true" android:name="io.github.pwlin.cordova.plugins.fileopener2.FileProvider">
        <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/opener_paths"/>
    </provider>
    <service android:exported="true" android:name="com.google.firebase.messaging.FirebaseMessagingService">
        <intent-filter android:priority="-500">
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>
    <receiver android:enabled="true" android:exported="false" android:name="com.google.android.gms.measurement.AppMeasurementReceiver"/>
    <receiver android:enabled="true" android:name="com.google.android.gms.measurement.AppMeasurementInstallReferrerReceiver" android:permission="android.permission.INSTALL_PACKAGES">
        <intent-filter>
            <action android:name="com.android.vending.INSTALL_REFERRER"/>
        </intent-filter>
    </receiver>
    <service android:enabled="true" android:exported="false" android:name="com.google.android.gms.measurement.AppMeasurementService"/>
    <receiver android:exported="true" android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver" android:permission="com.google.android.c2dm.permission.SEND">
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
            <category android:name="com.easternit.ec"/>
        </intent-filter>
    </receiver>
    <receiver android:exported="false" android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver"/>
    <service android:exported="true" android:name="com.google.firebase.iid.FirebaseInstanceIdService">
        <intent-filter android:priority="-500">
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>
    <provider android:authorities="com.easternit.ec.firebaseinitprovider" android:exported="false" android:initOrder="100" android:name="com.google.firebase.provider.FirebaseInitProvider"/>
    <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version"/>
</application>