How to Solve ʺandroid.jar or AndroidJar does not existʺ Error on Flutter
Introduction
The “android.jar or AndroidJar does not exist” error is a common issue faced by Flutter developers when building and running their Android applications. This error occurs when the Flutter build process is unable to locate the android.jar file, which is required for building and compiling the Android app. In this article, we will discuss the causes of this error and provide step-by-step solutions to resolve it.
Understanding the Error
The “android.jar or AndroidJar does not exist” error typically occurs when the Flutter build process is unable to find the android.jar file in the expected location. This file is usually located in the Android SDK directory, and its path is configured in the local.properties file of the Android project.
Solution 1: Check Android SDK Installation
To resolve this error, first, ensure that the Android SDK is properly installed on your system. You can check the Android SDK installation by running the following command in your terminal:
“`bash
android –version
“`
If the Android SDK is not installed, you can download and install it from the official Android website.
Solution 2: Update local.properties File
If the Android SDK is installed, the next step is to update the local.properties file to point to the correct location of the android.jar file. You can do this by adding the following line to the local.properties file:
“`properties
sdk.dir=/path/to/android/sdk
“`
Replace /path/to/android/sdk with the actual path to the Android SDK directory on your system.
Solution 3: Check android.jar File Existence
After updating the local.properties file, check if the android.jar file exists in the expected location. You can do this by running the following command in your terminal:
“`bash
ls /path/to/android/sdk/platforms/android-30/android.jar
“`
Replace /path/to/android/sdk with the actual path to the Android SDK directory on your system, and android-30 with the actual platform version.
Solution 4: Clean and Rebuild the Project
If the android.jar file exists, try cleaning and rebuilding the Flutter project to resolve any build issues. You can do this by running the following commands in your terminal:
“`bash
flutter clean
flutter pub get
flutter run
“`
This will clean the project, retrieve dependencies, and rebuild the app.
Conclusion
The “android.jar or AndroidJar does not exist” error can be frustrating, but it can be resolved by following the steps outlined in this article. By ensuring the Android SDK is installed, updating the local.properties file, checking the android.jar file existence, and cleaning and rebuilding the project, you can resolve this error and get back to building and running your Flutter app.
FAQ
1. What is the “android.jar or AndroidJar does not exist” error?
The “android.jar or AndroidJar does not exist” error is a build error that occurs when the Flutter build process is unable to locate the android.jar file.
2. How do I fix the “android.jar or AndroidJar does not exist” error?
To fix the error, ensure the Android SDK is installed, update the local.properties file, check the android.jar file existence, and clean and rebuild the project.
3. Where is the android.jar file located?
The android.jar file is usually located in the Android SDK directory, in the platforms folder of the respective platform version.
4. What is the purpose of the android.jar file?
The android.jar file is required for building and compiling the Android app, and it contains the Android API classes and interfaces.
5. Can I ignore the “android.jar or AndroidJar does not exist” error?
No, you should not ignore the “android.jar or AndroidJar does not exist” error, as it can prevent your app from building and running correctly.
