android - 应用卸载 Flutter 时不会删除应用数据库

Question

在我的应用程序中，我刚刚意识到在 Android 上卸载应用程序时不会删除 Sembast db，在 iOS 上它会被删除。
在这里查看其他答案我看到为了防止 Android 备份有标志 android:allowBackup="false"设置在 AndroidManifest.xml .所以我为 android/main/app 中的 Manifest 做了。没有改变。在应用程序卸载并重新安装后，db 仍然存在。
由于我的手机使用 Android 7.0 API 24，我猜这个标志会影响下次安装，但我必须手动删除 db。这次。
我是否正确添加了此标志？

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.vinny.fixit_cloud_biking">

    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
         calls FlutterMain.startInitialization(this); in its onCreate method.
         In most cases you can leave this as-is, but you if you want to provide
         additional functionality it is fine to subclass or reimplement
         FlutterApplication and put your custom class here. -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

    <application
        android:name="io.flutter.app.FlutterApplication"

        android:label="fixit"
        android:icon="@mipmap/ic_launcher">

        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize"
            android:allowBackup="false">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationReceiver" />
        <receiver android:name="com.dexterous.flutterlocalnotifications.ScheduledNotificationBootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
                <action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
            </intent-filter>
        </receiver>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>

我试图在手机目录 Android/data/com.vinny.fixit_cloud_biking/files 中查找 db 文件夹，但只有一个 Pictures文件夹。我在哪里可以删除旧数据库？这是单例中声明的路径 final dbPath = join(appDocumentDir.path, 'device.db');

Answer 1

尝试添加 android:allowBackup="false"在 <application>级别不是<activity>等级

 <application
        android:name="io.flutter.app.FlutterApplication"
        android:allowBackup="false"