我的drwables文件夹的图像

我在我的manifest.xml文件中有以下错误。由于通知图标错误，我无法获得通知。以下列出了我的错误。

1. URI未注册（设置|语言和框架|模式和DTD）
2. URI未注册（设置|语言和框架|模式和DTD）
   1.未解析的类“{applicationName}”
   1.无法解析符号“@mipmap/ic_launcher”
3. MainActivity必须扩展android.app.Activity
   1.无法解析符号“@style/LaunchTheme”
   1.无法解析符号“@style/NormalTheme”，这一切都显示为红色。
   如果有人能解决这个问题，真的很感激。

以下是我的manifest文件代码：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.aleyia_azadari_schedule"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://schemas.android.com/apk/res/android ">

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission
        android:name="com.google.android.gms.permission.AD_ID"
        tools:node="remove" />

    <queries>
        <intent>
            <action android:name="android.intent.action.SENDTO" />
            <data android:scheme="mailto" />
        </intent>
    </queries>

    <application
        android:label="Azadari Schedule"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            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:usesCleartextTraffic="true">
            <!-- 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" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <!-- 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" />
        <meta-data
            android:name="google_analytics_adid_collection_enabled"
            android:value="false" />
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_channel_id"
            android:value="high_importance_channel" />

    </application>
</manifest>