如何使用Flutter发布安卓应用

<manifest xmlns:android="Http://schemas.android.com/apk/res/android"
    package="com.example.gesture_demo">
    <!-- io.Flutter.app.FlutterApplication is an android.app.Application that
         calls FlutterMain.startInitialization(this); in its onCreate method.
         In most cases you can leave this as-is, but you if you want to provide
         additional functionality it is fine to subclass or reimplement
         FlutterApplication and put your custom class here. -->
    <application
        android:name="io.flutter.app.FlutterApplication"
        android:label="gesture_demo"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:confiGChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowsoftInputMode="adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <cateGory android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginReGIStrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>

<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@android:color/white" />

    <!-- You can insert your own image assets here -->
    <!-- <item>
        <bitmap
            android:gravity="center"
            android:src="@mipmap/launch_image" />
    </item> -->
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<!-- Modify this file to customize your launch splash screen -->
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  	<!-- 背景色 -->
    <item android:drawable="@android:color/white" />
		
  	<!-- 启动页图片，也可以添加其他元素 -->
    <item>
        <bitmap
            android:gravity="center"
            android:src="@mipmap/launch_image" />
    </item>
</layer-list>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.animation_demo">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    
    <application
        android:name="io.flutter.app.FlutterApplication"
        android:label="动画演示"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <!-- Don't delete the meta-data below.
             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
        <meta-data
            android:name="flutterEmbedding"
            android:value="2" />
    </application>
</manifest>

android {
    compileSdkVersion 28

    sourceSets {
        main.java.srcDirs += 'src/main/Kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.animation_demo"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

#其中~/key.jks是将keystore文件key.jks存储在~/目录下
keytool -genkey -v -keystore ~/key.jks -keyalg RSA -keysize 2048 -validity 10000 -alias key

输入密钥库口令:  
再次输入新口令: 
您的名字与姓氏是什么?
  [Unknown]:  lag
您的组织单位名称是什么?
  [Unknown]:  island-coder
您的组织名称是什么?
  [Unknown]:  RD
您所在的城市或区域名称是什么?
  [Unknown]:  Coder
您所在的省/市/自治区名称是什么?
  [Unknown]:  Island
该单位的双字母国家/地区代码是什么?
  [Unknown]:  CN
CN=lag, OU=island-coder, O=RD, L=Coder, ST=Island, C=CN是否正确?
  [否]:  Y

正在为以下对象生成 2,048 位RSA密钥对和自签名证书 (SHA256withRSA) (有效期为 10,000 天):
	 CN=lag, OU=island-coder, O=RD, L=Coder, ST=Island, C=CN
[正在存储/Users/lag/key.jks]

storePassWord={密钥库密码} #
keyPassword={证书密码}
keyAlias=key    #对应命令行的-alias后的别名
storeFile=/Users/lag/key.jks  #对应命令生成的key.jks的据对路径

	signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile = file(keystoreProperties['storeFile'])
            storePassword = keystoreProperties['storePassword']
        }
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
            
        }
    }

flutter build apk

flutter clean