颤振：Java使用或覆盖不推荐的API

Question

我一直在尝试在Android/IOS颤振应用程序中使用auth、firestore firebase，在测试了几个不同版本后，遇到了许多不同的问题。现在，它向我显示了构建日志中的几条消息。

构建日志

注意：D:\flatter\SDK\flatter。发布缓存\托管\发布。达特朗。org\firebase\u core-0.4。3.1\android\src\main\java\io\flatter\plugins\firebase\core\FirebaseCorePlugin。java使用或覆盖不推荐使用的API。注意：有关详细信息，请使用-Xlint:deprecation重新编译。注意：D:\flatter\SDK\flatter。发布缓存\托管\发布。达特朗。org\cloud\u firestore-0.13。0 1\android\src\main\java\io\flatter\plugins\firebase\cloudfirestore\CloudFirestorePlugin。java使用未经检查或不安全的操作。注意：使用-Xlint重新编译：未选中以获取详细信息。D8:无法在单个dex文件中容纳请求的类（#方法：81454

    at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1$1.create(NoIsolationWorkerFactory.java:61)

    at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:98)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.execute(NoIsolationWorkerFactory.java:61)
    at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
    at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
    at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:56)

    at org.gradle.workers.internal.DefaultWorkerExecutor$3.call(DefaultWorkerExecutor.java:215)
    at org.gradle.workers.internal.DefaultWorkerExecutor$3.call(DefaultWorkerExecutor.java:210)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:215)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)

    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
    at java.lang.Thread.run(Thread.java:748) Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to

在com上完成。Android工具。r8。乌提尔斯。t、 a（：55）在com.Android工具。r8。D8。在com上运行（：11）。Android建设者德兴。D8DEX存档合并。mergeDexArchives（D8DexArchiveMerge.java:116）。。。又有34个原因是：com.Android工具。r8。乌提尔斯。AbortException:错误：null，无法在单个dex文件中容纳请求的类（#方法：81454

失败：构建失败，有一个异常。

>

错误：任务“：app:mergeDexDebug”的执行失败。

执行com.android.build.gradle.internal.tasks.Worker$ActionFacadecom.android.builder.dexing.DexArchiveMergerExc0019时发生故障：合并dex存档时出错：. dex文件中的方法引用数不能超过64K。了解如何在https://developer.android.com/tools/building/multidex.html解决此问题

尝试：使用--stacktrace选项运行以获取堆栈跟踪。使用--info或--debug选项运行以获得更多日志输出。使用--scan运行以获得完整的洞察力。

构建在4m 33s中失败

颤振医生-v

[√]Flutter（通道稳定，v1.12.13热修复补丁.5，在Microsoft Windows[版本10.0.18362.535]，区域设置en-IN）

• • Flutter version 1.12.13+hotfix.5 at D:\Flutter\SDK\flutter

  • Framework revision 27321ebbad (3 weeks ago), 2019-12-10 18:15:01 -0800
  • Engine revision 2994f7e1e6
  • Dart version 2.7.0
  

  [√] Android工具链-为Android设备开发（Android SDK版本29.0.2）

  • • Android SDK at C:\Users\admin\AppData\Local\Android\sdk

    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: D:\Android SDK\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
    • All Android licenses accepted.
    

    [√] Android Studio（3.5版）

    • • Android Studio at D:\Android SDK

      • Flutter plugin version 41.1.2
      • Dart plugin version 191.8593
      • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
      

      公共规格

      dependencies:
        flutter:
          sdk: flutter
        firebase_auth: ^0.15.3
        cloud_firestore: ^0.13.0+1
      

      build.gradle（android）

      dependencies {
              classpath 'com.android.tools.build:gradle:3.5.0'
              classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
              classpath 'com.google.gms:google-services:4.3.0'
          }
      

Answer 1

为了使用minSdkVersion以下21你将不得不配置你的应用程序的Multidex如下：

android {
    defaultConfig {
        ...
        minSdkVersion 15 
        targetSdkVersion 28
        multiDexEnabled true
    }
    ...
}

dependencies {
  implementation "androidx.multidex:multidex:2.0.1"
}

在此之后，请运行

flutter pub upgrade
flutter pub get
flutter clean
flutter run

它仍然会抛出警告后，flutter干净，但至少它将有可能支持早期版本。更多关于官方文档的信息

Answer 2

您需要使用以下插件：

dependencies:
  firebase_auth: ^0.15.3
  cloud_firestore: ^0.13.0+1

别忘了配置firebase：

https://pub.dev/packages/cloud_firestore#setup

https://pub.dev/packages/firebase_auth#usage

也在您的应用程序/构建中。渐变，增加minSdkVersion：

更改此项：

minSdkVersion 16

变成这样：

minSdkVersion 23