Deepin v20 Flutter from zero configuration (Ubuntu theory applies)

The most detailed Flutter configuration instructions on the entire network, Ubuntu theory applies

Resource preparation
- Android Studio
  Download Android Studio and unzip
  
  Configure init.gradleand configure domestic sources to avoid slow running of Android Studio
  Create a .gradle directory under the HOME directory
```
mkdir .gradle
```
  Click to downloadinit.gradle file
  
  Placed in the .gradle directory
  Double-click studio.sh under /android-studio/bin (just select run in the pop-up window)
  
  Press the default setting and click all the way. When you encounter a proxy window with a red exclamation mark, click cancel, and then wait for the download of all necessary components to complete.
  - Configure Android Studio environment to the system
```
sudo deepin-editor ~/.bashrc
```
    注：Ubuntu 应该是以下命令，下文提到的类似操作均是如此，不再重复说明，Deepin用户请忽略这一说明。
    sudo nano /etc/profile
    Add :( note at the end of the following file .bashrc usernamechanged their deepin用户名)
```
# For Android Studio
export ANDROID_HOME=/home/username/Android/Sdk
export PATH=$PATH:$ANDROID_HOME/tools
export PATH=$PATH:$ANDROID_HOME/tools/bin
export PATH=$PATH:$ANDROID_HOME/platform-tools
export PATH=$PATH:$ANDROID_HOME/emulator
```
    Close the editor and refresh ~/.bashrc
```
source ~/.bashrc
```
    注：Ubuntu 应该是以下命令，下文提到的类似操作均是如此，不再重复说明。
    source /etc/profile
  - test
```
adb
```
    If output
```
Android Debug Bridge version 1.0.41
Version 30.0.4-6686687
Installed as /home/username/Android/Sdk/platform-tools/adb
...省略大量说明
```
    That is, the configuration is successful
- Visual Studio Code
  Download and install vs code
  
  Install the following plugins in the extension store
  - chinese
  - flutter
- jdk8
  Download jdk8 (requires registration to log in to Oracle) and unzip
  
  Create a jvm folder in the /usr/lib/ directory
```
sudo mkdir /usr/lib/jvm
```
  Enter the directory where the downloaded jdk is located, and move the decompressed directory jdk1.8.0_261 to /usr/lib/jvm/
```
sudo mv jdk1.8.0_261 /usr/lib/jvm/
```
  Configure Java to the system environment
```
sudo deepin-editor ~/.bashrc
```
  Add at the end of the .bashrc file:
```
# For JAVA
export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_261
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
```
  Close the editor and refresh ~/.bashrc
```
source ~/.bashrc
```
  test
```
java -version
```
  If output
```
java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)
```
  That is, the configuration is successful
- Flutter
  Download git
```
sudo apt install git -y
```
  Download Flutter (depending on personal network speed), pay attention to the location of clone, I run this command in the home directory, this will create a flutter directory in the home directory, just together with Android
```
git clone https://github.com/flutter/flutter.git
```
  Configure Flutter to the system environment
```
sudo deepin-editor ~/.bashrc
```
  Add :( note at the end of the following file .bashrc usernamechanged their deepin用户名)
```
# For Flutter
export PATH=/home/username/flutter/bin:$PATH
export PUB_HOSTED_URL=https://mirrors.tuna.tsinghua.edu.cn/dart-pub
export FLUTTER_STORAGE_BASE_URL=https://mirrors.tuna.tsinghua.edu.cn/flutter
```
  Close the editor and refresh ~/.bashrc
```
source ~/.bashrc
```
  Check the Flutter environment, and download the Dart SDK for the first run (depending on personal network speed)
```
flutter doctor
```
  Output (if you want to write a project in AS, just install the Flutter plug-in, here is VS Code as an example, AS will not repeat it)
```
[✓] Flutter (Channel master, 1.22.0-10.0.pre.161, on Linux, locale zh_CN.UTF-8)
 
[!] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    ✗ Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[!] Android Studio (version 4.0)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.49.0)
[!] Connected device
    ! No devices available
```
  Verify the Android certificate (note that if it is not jdk8 here, an error will be reported)
```
flutter doctor --android-licenses
```
  Just go all the way
  
  Modify the default Flutter source
  
  Enter the following directory flutter/packages/flutter_tools/gradle/flutter.gradle file:
  
  amend as below:
```
//...
buildscript {
     repositories {
         //google()
         //jcenter()
         maven { url 'https://maven.aliyun.com/repository/google' }
         maven { url 'https://maven.aliyun.com/repository/jcenter' }
         maven { url 'https://maven.aliyun.com/repository/public' }
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.5.0'
     }
 }
//...
```
  Save and exit
Experience Flutter
- Create a new application
  1. Start VS Code
  2. Call View>Command Palette… (or Ctrl + Shift + P ,F1)
  3. Type in'flutter', then select the'Flutter: New Project' action
  4. Enter the name of the Project (eg myapp), then press Enter
  5. Specify where to place the item and press the blue OK button
  6. Wait for the project creation to continue, and display the main.dart file
    
    …
  …Experience Flutter content from the Flutter Chinese website to view by yourself

At this point, the Flutter environment has been fully configured, and enjoy it!

Deepin v20 Flutter from zero configuration (Ubuntu theory applies)

Deepin v20 Flutter from zero configuration (Ubuntu theory applies)

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