سلام و احترام

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ممنون میشم راهنمایی بفرمایید.

FAILURE: Build failed with an exception.

* Where:

Build file '/Users/mehrdadameri/Documents/Codes/Flutter/world_time/android/build.gradle' line: 26

* What went wrong:

A problem occurred evaluating root project 'android'.

> A problem occurred configuring project ':app'.

  > Could not resolve all files for configuration ':app:classpath'.

   > Could not find gradle-4.1.0.jar (com.android.tools.build:gradle:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/4.1.0/gradle-4.1.0.jar

   > Could not find builder-4.1.0.jar (com.android.tools.build:builder:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/builder/4.1.0/builder-4.1.0.jar

   > Could not find bundletool-0.14.0.jar (com.android.tools.build:bundletool:0.14.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/bundletool/0.14.0/bundletool-0.14.0.jar

   > Could not find sdk-common-27.1.0.jar (com.android.tools:sdk-common:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/sdk-common/27.1.0/sdk-common-27.1.0.jar

   > Could not find aapt2-proto-4.1.0-6503028.jar (com.android.tools.build:aapt2-proto:4.1.0-6503028).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/aapt2-proto/4.1.0-6503028/aapt2-proto-4.1.0-6503028.jar

   > Could not find ddmlib-27.1.0.jar (com.android.tools.ddms:ddmlib:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/ddms/ddmlib/27.1.0/ddmlib-27.1.0.jar

   > Could not find sdklib-27.1.0.jar (com.android.tools:sdklib:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/sdklib/27.1.0/sdklib-27.1.0.jar

   > Could not find layoutlib-api-27.1.0.jar (com.android.tools.layoutlib:layoutlib-api:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/layoutlib/layoutlib-api/27.1.0/layoutlib-api-27.1.0.jar

   > Could not find dvlib-27.1.0.jar (com.android.tools:dvlib:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/dvlib/27.1.0/dvlib-27.1.0.jar

   > Could not find repository-27.1.0.jar (com.android.tools:repository:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/repository/27.1.0/repository-27.1.0.jar

   > Could not find shared-27.1.0.jar (com.android.tools.analytics-library:shared:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/analytics-library/shared/27.1.0/shared-27.1.0.jar

   > Could not find common-27.1.0.jar (com.android.tools:common:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/common/27.1.0/common-27.1.0.jar

   > Could not find protos-27.1.0.jar (com.android.tools.analytics-library:protos:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/analytics-library/protos/27.1.0/protos-27.1.0.jar

   > Could not find core-proto-0.0.2-dev.jar (com.google.test.platform:core-proto:0.0.2-dev).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/google/test/platform/core-proto/0.0.2-dev/core-proto-0.0.2-dev.jar

   > Could not find apkzlib-4.1.0.jar (com.android.tools.build:apkzlib:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/apkzlib/4.1.0/apkzlib-4.1.0.jar

   > Could not find apksig-4.1.0.jar (com.android.tools.build:apksig:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/build/apksig/4.1.0/apksig-4.1.0.jar

   > Could not find annotations-27.1.0.jar (com.android.tools:annotations:27.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/tools/annotations/27.1.0/annotations-27.1.0.jar

   > Could not find databinding-common-4.1.0.jar (androidx.databinding:databinding-common:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/androidx/databinding/databinding-common/4.1.0/databinding-common-4.1.0.jar

   > Could not find baseLibrary-4.1.0.jar (com.android.databinding:baseLibrary:4.1.0).

    Searched in the following locations:

      https://dl.google.com/dl/android/maven2/com/android/databinding/baseLibrary/4.1.0/baseLibrary-4.1.0.jar

* 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 26s

Exception: Gradle task assembleDebug failed with exit code 1