将Target SDK从30升级到33时遇android:exported接收器错误求助

将项目Target SDK版本从30升级到33后出现编译错误，提示需为receiver明确设置android:exported="true"，但项目的AndroidManifest.xml中并未声明任何receiver。

错误截图：

项目的AndroidManifest.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <uses-feature
        android:name="android.hardware.camera"
        android:required="true" />
    <uses-feature
        android:name="android.hardware.camera.autofocus"
        android:required="false" />


    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

    <uses-permission android:name="com.android.vending.BILLING" />

    <application
        android:name="com.Coading.freecode.MyApp"
        android:allowBackup="true"
        android:hardwareAccelerated="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:networkSecurityConfig="@xml/network_security_config"
        android:requestLegacyExternalStorage="true"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.CamScanner"
        android:usesCleartextTraffic="true">


        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true"
            tools:replace="android:authorities">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths"
                tools:replace="android:resource" />
        </provider>

        <activity android:name="com.Coading.freecode.activity.BaseActivity" />
        <activity
            android:name="com.Coading.freecode.activity.SplashActivity"
            android:screenOrientation="portrait"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.Coading.freecode.activity.MainActivity"
            android:screenOrientation="portrait"
            android:windowSoftInputMode="adjustPan" />
        <activity
            android:name="com.Coading.freecode.activity.ScannerActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.yalantis.ucrop.UCropActivity"
            android:theme="@style/uCropStyle"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.IDCardPreviewActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.CropDocumentActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.CurrentFilterActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.SavedDocumentActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.DocumentEditorActivity"
            android:screenOrientation="portrait"
            android:windowSoftInputMode="adjustNothing" />
        <activity
            android:name="com.Coading.freecode.activity.SavedEditDocumentActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.SavedDocumentPreviewActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.NoteActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.ImageToTextActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.GroupDocumentActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.PDFViewerActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.QRGenerateActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.QRReaderActivity"
            android:screenOrientation="portrait" />
        <activity
            android:name="com.Coading.freecode.activity.PrivacyPolicyActivity"
            android:screenOrientation="portrait" />

        <meta-data
            android:name="com.google.android.gms.vision.DEPENDENCIES"
            android:value="ocr" />
        <meta-data
            android:name="com.google.android.gms.ads.APPLICATION_ID"
            android:value="@string/admob_app_id" />

    </application>

</manifest>

问题核心是引入的第三方依赖库中声明了BroadcastReceiver，但未添加android:exported属性。Android 12（API 31）及以上要求所有组件（Activity、Service、Receiver）若带有intent-filter或需被外部调用，必须明确设置该属性。

解决步骤：

1. 定位未设置exported的receiver
   打开Android Studio，通过Build > Analyze APK选择编译生成的APK，在弹出窗口中查看合并后的AndroidManifest.xml；或者直接访问项目目录下app/build/intermediates/merged_manifests/debug/AndroidManifest.xml，找到缺失android:exported属性的BroadcastReceiver。

2. 手动补全属性
   在自身的AndroidManifest.xml中添加对应receiver声明，用tools:replace覆盖属性。例如找到第三方库的com.example.library.SomeReceiver，可添加：

   <receiver
       android:name="com.example.library.SomeReceiver"
       android:exported="true" <!-- 需接收系统广播设true，仅内部使用设false -->
       tools:replace="android:exported" />
   

3. 升级第三方依赖版本
   主流开源库基本已适配Android 12+，升级AdMob、UCrop等依赖到最新版本，新版本通常会自动给组件添加android:exported属性。

内容的提问来源于stack exchange，提问作者tfih313