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1.Flutter SDK not found. Define location with flutter.sdk in the local.properties file.
Open File
解決：在.android下面增加local.properties，里面加入flutter.sdk=E:\flutter
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cannot resolve symbol binding 解決：
gradle-wrapper使用4.10.2 （5.1.1以下就可以）
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- C:\Project\teck_note\module_flutter.android\include_flutter.groovy (C:\Project\teck_note\module_flutter.android\include_flutter.groovy)
Open File
解決：把報錯的路徑復制到電腦文件管理器，會報錯。
改到路徑對了為止。
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4.Configuration with name 'default' not found
解決：settings.gradle中的工程下面，沒有build.gradle
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5.重建.android文件夾
解決：刪除.android ，之后flutter packages get
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6.webView選擇
webview_flutter：官方，功能少
flutter_webview_plugin： 不在Flutter Widget Tree內
flutter_inappwebview 最終選用這個，上面兩個要么加載復雜本地html不方便，要么和js交互不方便
flutter_inappwebview加載本地html，需要把html用到的所有層級的js和資源，加到pubspec.yaml里面；和js的交互是異步的
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7.混合開發
原先的混合開發方式已不再適用，現在用
FlutterEngine flutterEngine = new FlutterEngine(this);
// Start executing Dart code in the FlutterEngine.
flutterEngine.getDartExecutor().executeDartEntrypoint(
DartExecutor.DartEntrypoint.createDefault()
);
// Cache the pre-warmed FlutterEngine to be used later by FlutterFragment.
FlutterEngineCache
.getInstance()
.put(MethodChannelPlugin.ENGINE_ID, flutterEngine);
GeneratedPluginRegistrant.registerWith(flutterEngine);
MethodChannelPlugin.registerWith(flutterEngine);
}
FlutterFragment flutterFragment = FlutterFragment.withCachedEngine(MethodChannelPlugin.ENGINE_ID).build();
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8.open for editing in android studio 不見了
復制別的項目的android/[project_name]_android.iml
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9.提示升級embedded v2
https://github.com/flutter/flutter/wiki/Upgrading-pre-1.12-Android-projects
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10.無法運行profile模式
-- 把build.gradle中，debug和release的自定義配置信息（如multiDexEnabled buildConfigField），放到defaultConfig中一份。
-- android/app/src/profile/AndroidManifest.xml 中修改包名等
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11.devTools跑不起來，一直build in progress
嘗試如下也不行
flutter pub global deactivate devtools
flutter pub cache repair
flutter pub global activate devtools
flutter pub global run devtools
進入報錯目錄，用老版本覆蓋
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- as中dart analyze 失敗，但是命令行可以編譯過
解決：as中設置flutter sdk路徑
//flutter 2.0時代
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13.直接run的release包，沒有arm-v7的.so。couldn't find "libflutter.so"啟動崩潰
常見的 無效的 解決辦法：
1:gradle中設置 abiFilters指定v7，這種只在用as打開app目錄build.gradle中有效
release {
ndk {
abiFilters 'armeabi-v7a'
}
}
2:local.properties中設置target-platform=android-arm
3: 其他命令行加參數等方法
解決：在sdk/flutter/packages/flutter_tools/gradle/flutter.gradle中
private List<String> getTargetPlatforms() {
if (!project.hasProperty('target-platform')) {
println("NO!!!!!!!!!!!!!!!!!target-platform")
return DEFAULT_PLATFORMS
}
return project.property('target-platform').split(',').collect {
println("split!!!!!!!!!!!!!!!!!target-platform $it\n")
if (!PLATFORM_ARCH_MAP[it]) {
throw new GradleException("Invalid platform: $it.")
}
return it
}
}
然后編譯看日志結果。
app模塊中apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
把project傳入給SDK的flutter.gradle
所以我們需要給app module中增加property
先在gradle.properties中設置target-platform=android-arm
然后在項目的根目錄的build.gradle
rootProject.setProperty('target-platform', 'android-arm')
subprojects {
project.setProperty('target-platform', 'android-arm')
}
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14.直接run的debug包，couldn't find "libflutter.so"啟動崩潰，即使apk中有對應.so
解決：檢查各個子module中不能有其他格式的abiFilters
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15.ScrollAppBar配合listView滾動異常
滾不到最底
解決：延時100ms執行animateTo，動畫duration要根據list長度大于100ms到1500ms
ListView逐漸邊長，剛把SrollAppBar快頂出屏幕，ScrollAppBar異常跳動
解決：ListView高度不對，沒有算進去ScrollAppBar
ListKey.currentContext.size.height不對
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16.語法小坑：
坑1：
dart的對象是引用傳遞
但是有一種情況不能傳遞。
class A{
Obj? obj;
classB.setValue(obj);//會給obj賦值
onDispose() {
obj?.dispose(); //obj一直是null
}
}
建議在A中初始化好obj
坑2：
static void send(String name, {Map<String, dynamic>? map}) {
if (map == null) map = {};
map.addAll({
"info": 'aaa',
});
send(name, map);
}
會報錯type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'Map<String, Object>' in type cast
建議指明類型
Map<String, String> infoMap = {
"info": 'aaa',
};
map.addAll(infoMap);
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17.flutter compileDebugJavaWithJavac
cd /Applications/Android\ Studio.app/Contents/jre
ln -s ../jre jdk
ln -s "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin" jdk
flutter doctor -v
