Android Studio Fails to Detect the Emulator After Successful Creation

Description

Solution

1. Open the File menu in the upper-left corner and choose Project Structure.

   

2. Under Project SDK, select Android SDK.

   

3. Click Apply and then OK in the lower-right corner to save the configuration.

   

4. Android Studio should now detect the emulator automatically.

   

flutter doctor Reports NO_PROXY Is Not Set

Description

Solution

Add the following key-value pair to your environment variables:

NO_PROXY=localhost,127.0.0.1,LOCALHOST

Running the Project Hangs at “Running Gradle task 'assembleDebug'”

Here are several approaches you can try:

1. Switch to Mirror Repositories

   • In the Flutter SDK directory, open packages/flutter_tools/gradle/flutter.gradle and adjust the repository list as follows:

     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' }
     }

   • Inside your Flutter project, open android/build.gradle and update the repository blocks:

     buildscript {
        ext.kotlin_version = '1.3.50'
        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' }
        }
     }
     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' }
        }
     }

2. Set Your Proxy/VPN to Global Mode and choose an overseas node (avoid Hong Kong, Taiwan, etc.).

3. Adjust the Gradle Wrapper Version

   • In android/gradle/wrapper/gradle-wrapper.properties, replace distributionUrl=https\://services.gradle.org/distributions/gradle-*.*.*-all.zip with distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-all.zip.

4. Clear Caches Before Retrying

   After applying the changes above, clean up the following before you rerun the project:

   • Delete the .gradle directory under C:\Users\<username>
   • Delete android/gradle/wrapper/gradle-wrapper.jar inside the project
   • Run flutter clean at the project root