You uploaded an APK or Android App Bundle which has an activity, activity alias, service or broadcast receiver with intent filter, but without 'android:exported' property set. This file can't be installed on Android 12 or higher. See: developer.android.com/about/versions/12/behavior-changes-12#expor
My manifest code:
<uses-permission android:name="android.permission.INTERNET" android:exported="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" android:exported="true"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" android:exported="true"/>
<application
android:icon="@mipmap/ic_launcher"
android:label="DAAPP "
android:requestLegacyExternalStorage="true"
android:usesCleartextTraffic="true">
<activity
android:name=".MainActivity"
android:exported="true"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:windowSoftInputMode="adjustResize"
>
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
android:exported="true" />
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:exported="true"
android:resource="@drawable/launch_background" />
<intent-filter>
<action android:name="android.intent.action.MAIN" android:exported="true"/>
<category android:name="android.intent.category.LAUNCHER" android:exported="true"/>
</intent-filter>
</activity>
<receiver android:name=".MyBroadcastReceiver" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.INPUT_METHOD_CHANGED" />
</intent-filter>
</receiver>
<service
android:name="com.rmdaapp.RM_DAAPP.backgroundService"
android:exported="true">
<intent-filter>
<action android:name="com.rmdaapp.RM_DAAPP.START_BACKGROUND" />
</intent-filter>
</service>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:exported="true"
android:value="2" />
</application>