对flutter有兴趣的小伙伴可以一起学习呀～

好用的命令行

flutter pub pub cache repair ：清理缓存

错误一：

flutter project插入图片异常

xjdMacBook-Pro:flutter_app_layout xj.d$ flutter run -d all
Running "flutter packages get" in flutter_app_layout...
Error on line 40, column 2 of pubspec.yaml: Expected a key while parsing a block mapping.assets:^
pub get failed (65)

flutter插入图片

1.根项目创建文件名为【图像】文件夹

2.将文件复制到文件夹下面

3.pubspec.yaml文件下面配置该图片

注意图的名字都正确，配置和使用都保持一致（楼主该图随便百度下的），否则无法找到资源

错误二：

错误提示：请在android / folde中查看您的Gradle项目设置

 +818 ms] ------------------------------------------------------------Gradle 4.1------------------------------------------------------------Build time:   2017-08-07 14:38:48 UTCRevision:     941559e020f6c357ebb08d5c67acdb858a3defc2Groovy:       2.4.11Ant:          Apache Ant(TM) version 1.9.6 compiled on June 29 2015JVM:          1.8.0_152-release (JetBrains s.r.o 25.152-b06)OS:           Mac OS X 10.14.1 x86_64
[{"event":"app.progress","params":{"appId":"d7911b72-32cb-4f2c-b548-e7b8e073da36","id":"0","progressId":null,"finished":true}}]
Resolving dependencies...
[{"event":"app.progress","params":{"appId":"d7911b72-32cb-4f2c-b548-e7b8e073da36","id":"1","progressId":null,"message":"Resolving dependencies..."}}]FAILURE: Build failed with an exception.* Where:Build file '/Users/xj.deng/Ali/widgets/hybrid_stack_manager/example/android/app/build.gradle' line: 15* What went wrong:A problem occurred evaluating project ':app'.> Could not resolve all files for configuration 'classpath'.> Could not find lint-gradle-api.jar (com.android.tools.lint:lint-gradle-api:26.1.2).Searched in the following locations:https://jcenter.bintray.com/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar* Try:Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output......* Error running Gradle:Exit code 1 from: /Users/xj.deng/ali/widgets/hybrid_stack_manager/example/android/gradlew app:properties:Failed to notify ProjectEvaluationListener.afterEvaluate(), but primary configuration failure takes precedence.java.lang.IllegalStateException: compileSdkVersion is not specified.at com.google.common.base.Preconditions.checkState(Preconditions.java:456)at com.android.build.gradle.BasePlugin.createAndroidTasks(BasePlugin.java:590)at com.android.build.gradle.BasePlugin.lambda$null$3(BasePlugin.java:555)at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:81)

flutter - >在android stuido错误中打开android模块

Could not find lint-gradle-api.jar (com.android.tools.lint:lint-gradle-api:26.1.2).
Searched in the following locations:https://jcenter.bintray.com/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar
Open File

解决办法：

因为是GitHub的上拉下来的代码，gradle4.1，查看自己配置环境的gradle这个版本，是否一致，需改版本。
我解决办法直接删了项目gralde，粘贴自己没有问题的flutter gralde文件，上图。就是这么暴力~~

错误三：

异常：Android dependency ‘com.android.support:support-core-utils’ has different version for the compile (25.3.0) and runtime (27.1.1) classpath. You should manually set the same version via DependencyResolution
原因：创建一个lib【common】，app：依赖【common】出现该原因。
解决办法：

subprojects {
//    project.evaluationDependsOn(':app')project.configurations.all {resolutionStrategy.eachDependency { details ->if (details.requested.group == 'com.android.support'&& !details.requested.name.contains('multidex') ) {details.useVersion "27.1.1"}}}
}

如图：

错误:

日志： Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.

修改：
MainActivity主题配置：

<activityandroid:name=".MainActivity"android:launchMode="singleTop"android:theme="@style/Theme.AppCompat"android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"android:hardwareAccelerated="true"android:windowSoftInputMode="adjustResize"><!-- This keeps the window background of the activity showinguntil Flutter renders its first frame. It can be removed ifthere is no splash screen (such as the default splash screendefined in @style/LaunchTheme). --><meta-dataandroid:name="io.flutter.app.android.SplashScreenUntilFirstFrame"android:value="true" /><intent-filter><action android:name="android.intent.action.MAIN"/><category android:name="android.intent.category.LAUNCHER"/></intent-filter></activity>

错误

日志：androidstudio 切换到flutter项目Android报错
Flutter SDK not found. Define location with flutter.sdk in the local.properties file.

解决办法：删android/local.properties文件，运行【flutter build apk】
然后重新打开studio到Android channel，如下图，ok～

错误

混合开发，Native+Flutter
错误提示：

/Users/xx/xx/flutter-project/my_flutter/.android/include_flutter.groovy (/Users/xx/alibaba/flutter-project/my_flutter/.android/include_flutter.groovy)

修改：补全路径

提示

Androidstudio打开flutter project 无法切换Android版本：【Open Android module in Android Studio】无法选择
正常情况如图：

解决办法：查看是否有这个.iml文件没有就加进去

错误提示：

编译ios出错：

diff: /Podfile.lock: No such file or directory
diff: /Manifest.lock: No such file or directory
error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.

解决方案：
控制台敲命令行：

flutter build ios --release

关闭xcode重启项目

错误

最近在弄IOS打包，遇到的问题是，debug包都没问题，release包安装在手机上面后，页面一直停留在欢迎页面，无法进入首页。
原因：flutter一部分dart包过时，无法支持release
解决：对应更新一下flutter 项目里面依赖都dart包就好了
具体因为哪一个导致的没有细查，大部分都更新了一下，就好了～

错误提醒

[+3059 ms] FAILURE: Build failed with an exception.
[   +1 ms] * What went wrong:
[        ] Execution failed for task ':app:processDebugResources'.
[        ] > Android resource linking failed
[        ]   /Users/xj.deng/alibaba/xj_fluttergo/flutter-go/android/app/src/main/res/drawable/launch_background.xml:8: AAPT: error: resource mipmap/splash (aka com.alibaba.fluttergo:mipmap/splash) not found.
[        ]   error: failed linking file resources.
[        ] * Try:
[        ] Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
[        ] * Get more help at https://help.gradle.org
[        ] BUILD FAILED in 3s
[ +367 ms] *******************************************************************************************
[        ] The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
[        ] See https://goo.gl/CP92wY for more information on the problem and how to fix it.
[        ] *******************************************************************************************

项目使用了gradle-4.10-all.zip，导致androidX，解决办法下面链接
https://flutter.dev/docs/development/packages-and-plugins/androidx-compatibility

错误提示：

 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.alibaba.fluttergo/com.alibaba.fluttergo.MainActivity}: java.lang.IllegalStateException: ensureInitializationComplete must be called after startInitializationCaused by: java.lang.IllegalStateException: ensureInitializationComplete must be called after startInitializationat io.flutter.view.FlutterMain.ensureInitializationComplete(FlutterMain.java:177)at com.alibaba.fluttergo.MainActivity.onCreate(MainActivity.kt:49)at android.app.Activity.performCreate(Activity.java:7136)at android.app.Activity.performCreate(Activity.java:7127)at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)

解决处理：
添加FlutterMain.startInitialization(this)
如下图所示：ensureInitializationComplete前添加

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