[Perfect solution]Could not determine the dependencies of task ':app:compileDebugJavaWithJavac'.

After creating a new Flutter project Android project, click Run and an error will appear!

error.png

This is caused by the inaccessibility of the mirror site! It only needs to be modified to a domestically accessible site.

Step 1: Modify build.gradle in the Android directory of the project

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
//        google() 无法访问，使用阿里镜像
//        jcenter()
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven { url 'https://maven.aliyun.com/repository/jcenter' }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
        maven { url 'http://download.flutter.io'}

    }

allprojects {
    repositories {
//        google()
//        jcenter()
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven { url 'https://maven.aliyun.com/repository/jcenter' }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
    }
}

Step 2: Modify flutter.gradle in flutter SDK

path: flutter\packages\flutter_tools\gradle\flutter.gradle

buildscript {
    repositories {
        maven { url 'https://maven.aliyun.com/repository/google' }
        maven { url 'https://maven.aliyun.com/repository/jcenter' }
        maven { url 'http://maven.aliyun.com/nexus/content/groups/public' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
    }
}