Flutter投稿記事

参考文献

1. settings_aar.gradleが存在しないエラー

◆ エラー内容

1. Copy `settings.gradle` as `settings_aar.gradle`
2. Remove the following code from `settings_aar.gradle`:

    def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
    def properties = new Properties()

    assert localPropertiesFile.exists()
    localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }

    def flutterSdkPath = properties.getProperty("flutter.sdk")
    assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
    apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

◆ 解決策

setting_aar.gradle

include ':app'
def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()

def plugins = new Properties()
def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
if (pluginsFile.exists()) {
    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
}

plugins.each { name, path ->
    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
    include ":$name"
    project(":$name").projectDir = pluginDirectory
}

2. amplify add codegen実行エラー

◆ エラー内容

Error: amplify-codegen-appsync-model-plugin not support language target flutter. Supported codegen targets arr java, android, swift, ios, javascript, typescript

◆ 解決策

$ npm install -g @aws-amplify/cli
 $ amplify -v
 $ amplify upgrade
 4.41.0

3. Podfile platformエラー

◆ エラー内容

they required a higher minimum deployment target.

◆ 解決策

platform :ios, '8.0'   // before
platform :ios, '9.0'   // after

4. android:labelエラー

◆ エラー内容

Error: Attribute application@label value=(flutter_bloc_pattern) from AndroidManifest.xml:18:9-45 is also present at [:DynamsoftBarcodeReader] AndroidManifest.xml:13:9-41 value=(@string/app_name).

◆ 解決策

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.sample">   // 追記
    <!-- 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. -->
    <application
        tools:replace="android:name"
        android:name="io.flutter.app.FlutterApplication"
        android:label="sample"
        android:icon="@mipmap/ic_launcher">

5. Android画面固定

◆ 横画面固定

AndroidManifest.xml

<activity
    android:name=".MainActivity"
    android:screenOrientation="landscape"
</activity>

◆ 縦画面固定

AndroidManifest.xml

<activity
    android:name=".MainActivity"
    android:screenOrientation="portrait"
</activity>