gradle 任务组装调试失败答案

【问题标题】：gradle task assemble debug failedgradle 任务组装调试失败
【发布时间】：2019-11-07 09:33:56
【问题描述】：

更新插件和 android studio 后。每次在 android studio 中重新启动后，我都必须手动配置 dart-sdk。当我升级 dart-sdk 时显示此错误=>

Note: C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.12.9+4\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\CloudFirestorePlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\cloud_firestore-0.12.9+4\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\CloudFirestorePlugin.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\shared_preferences-0.5.4\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:137: warning: [unchecked] unchecked cast
      return (List<String>) stream.readObject();
                                             ^
  required: List<String>
  found:    Object
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\shared_preferences-0.5.4\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:182: warning: [unchecked] unchecked method invoca
tion: constructor <init> in class ArrayList is applied to given types
          List<String> listValue = new ArrayList<>((Set) value);
                                   ^
  required: Collection<? extends E>
  found: Set
  where E is a type-variable:
    E extends Object declared in class ArrayList
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\shared_preferences-0.5.4\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:182: warning: [unchecked] unchecked conversion
          List<String> listValue = new ArrayList<>((Set) value);
                                                   ^
  required: Collection<? extends E>
  found:    Set
  where E is a type-variable:
    E extends Object declared in class ArrayList
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\shared_preferences-0.5.4\android\src\main\java\io\flutter\plugins\sharedpreferences\MethodCallHandlerImpl.java:182: warning: [unchecked] unchecked conversion
          List<String> listValue = new ArrayList<>((Set) value);
                                   ^
  required: List<String>
  found:    ArrayList
C:\src\flutter\.pub-cache\hosted\pub.dartlang.org\shared_preferences-0.5.4\android\src\main\java\io\flutter\plugins\sharedpreferences\SharedPreferencesPlugin.java:26: warning: [deprecation] getFlutterEngine() i
n FlutterPluginBinding has been deprecated
    setupChannel(binding.getFlutterEngine().getDartExecutor(), binding.getApplicationContext());
                        ^
5 warnings

它也没有在代码中显示建议。我花了几乎一整天的时间来解决这个错误，请帮忙。在此之后，我再也不会更新任何插件或我的 android studio 了。

【问题讨论】：

标签： flutter dart

【解决方案1】：

只需在 build.gradle 文件中添加 multiDexEnabled true

defaultConfig {

        applicationId "com.test.testapp"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

// add this line
        multiDexEnabled true
    }

在同一个文件里面添加multidex依赖

dependencies {
     // If you're project has androidx support then add this dependency
     implementation 'androidx.multidex:multidex:2.0.1'

     // If you're project doesn't have androidx support then add this dependency
     implementation 'com.android.support:multidex:1.0.3'
}

了解更多关于androidX迁移visit the documentation here

【讨论】：

【解决方案2】：

尝试运行flutter clean 和flutter packages get 命令。在 Android Studio 中使缓存失效并重新启动（文件 -> 使缓存失效/重新启动）。

【讨论】：

【解决方案3】：

迁移到 Android X 并在 gradle 文件中将每个 Android 库覆盖到 AndroidX 应该这样做。

【讨论】：