移植Flutter项目

Question

当我创建一个现有项目时，出现了以下消息：

Warning: Your Flutter application is created using an older version of the Android
embedding. It's being deprecated in favor of Android embedding v2.

Answer 1

在您的项目中，在appication标记内的activity标记之后的AndroidManifest.xml中添加以下行：

<meta-data
            android:name="flutterEmbedding"
            android:value="2" />

以my AndroidManifest.xml为例：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example_app">
    <uses-permission android:name="android.permission.INTERNET" />
   <application
        android:label="Example App"
        android:icon="@mipmap/ic_launcher"
        android:usesCleartextTraffic="true"
        android:allowBackup="false"> 
        <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">
            <!-- 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"
              />
            <!-- 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:resource="@drawable/launch_background"
              />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
<!-- HERE HERE HERE HERE -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>