cant run the flutter apps on android studio - flutter

Question

i'm going to learn flutter.
so i installed the latest version of flutter(Flutter 3.3.8) and make the path of that on windows.
then i installed the latest version of android studio(Android Studio Dolphin | 2021.3.1 Patch 1) and installed the flutter plugin and sdk and emulator of api 32 and 29 on it.
also i installed the java jdk and jre v8.
but when i try to run the defult app on emulator in recevied this error on terminal :
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all files for configuration ':classpath'.
> Could not find com.android.tools.build:gradle:7.1.2.
Searched in the following locations:
- https://dl.google.com/dl/android/maven2/com/android/tools/build/gradle/7.1.2/gradle-7.1.2.pom
- https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/7.1.2/gradle-7.1.2.pom
Required by:
project :
and here it is the result of doctor command of flutter :
C:\Users\new>flutter doctor -v
[√] Flutter (Channel stable, 3.3.8, on Microsoft Windows [Version 10.0.18363.535], locale en-US)
• Flutter version 3.3.8 on channel stable at E:\src\flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 52b3dc25f6 (9 days ago), 2022-11-09 12:09:26 +0800
• Engine revision 857bd6b74c
• Dart version 2.18.4
• DevTools version 2.15.0
[√] Android toolchain - develop for Android devices (Android SDK version 33.0.0)
• Android SDK at C:\Users\new\AppData\Local\Android\sdk
• Platform android-33, build-tools 33.0.0
• Java binary at: E:\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
• All Android licenses accepted.
[√] Chrome - develop for the web
• Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
[X] Visual Studio - develop for Windows
X Visual Studio not installed; this is necessary for Windows development.
Download at https://visualstudio.microsoft.com/downloads/.
Please install the "Desktop development with C++" workload, including all of its default components
[√] Android Studio (version 2021.3)
• Android Studio at E:\Android\Android Studio
• Flutter plugin can be installed from:
https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.13+0-b1751.21-8125866)
[√] VS Code, 64-bit edition (version 1.71.2)
• VS Code at C:\Program Files\Microsoft VS Code
• Flutter extension can be installed from:
https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[√] Connected device (3 available)
• sdk gphone64 x86 64 (mobile) • emulator-5554 • android-x64 • Android 12 (API 32) (emulator)
• Windows (desktop) • windows • windows-x64 • Microsoft Windows [Version 10.0.18363.535]
• Chrome (web) • chrome • web-javascript • Google Chrome 107.0.5304.107
[√] HTTP Host Availability
• All required HTTP hosts are available
I would be grateful if you could guide me in solving this problem.
thx to all!
build.gradle codes

Answer 1

Add google() to your repositories(buildscript and allprojects sections) of app level build.gradle file. The Android Gradle plugin is located there: your_project_folder/android/build.gradle
buildscript {
...
repositories {
google()
mavenCentral()
}
}
allprojects {
repositories {
google()
mavenCentral()
}
}

Answer 2

after some days and try many ways to solve this problem!
found the right solution :
proxy setting was my problem and config that with new proxy settings solve that problem!
thanks everyone.
solved!