1、配置Android签名；

example/android/app/build.gradle

@@ -24,9 +24,9 @@ if (flutterVersionName == null) {
 apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
-//def keystorePropertiesFile = rootProject.file("app/key.properties")
-//def keystoreProperties = new Properties()
-//keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+def keystorePropertiesFile = rootProject.file("app/key.properties")
+def keystoreProperties = new Properties()
+keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
 
 android {
     compileSdkVersion 33
@@ -44,26 +44,25 @@ android {
         versionName flutterVersionName
     }
     signingConfigs {
-//        release {
-//            //keystore中key的别名
-//            keyAlias keystoreProperties['keyAlias']
-//            //keystore中key的密码
-//            keyPassword keystoreProperties['keyPassword']
-//            //keystore的文件路径，可以是绝对路径也可以是相对路径
-//            storeFile file(keystoreProperties['storeFile'])
-//            //keystore的密码l
-//            storePassword keystoreProperties['storePassword']
-//        }
-    }
-   buildTypes {
-        debug {
-//            signingConfig signingConfigs.release
-        }
         release {
-            // flutter build apk
-//            signingConfig signingConfigs.release
+            keyAlias keystoreProperties['keyAlias']
+            keyPassword keystoreProperties['keyPassword']
+            storeFile file(keystoreProperties['storeFile'])
+            storePassword keystoreProperties['storePassword']
         }
     }
+   buildTypes {
+       debug {
+           signingConfig signingConfigs.release
+       }
+       release {
+           signingConfig signingConfigs.release
+           shrinkResources false
+           zipAlignEnabled false
+           minifyEnabled true
+           proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+       }
+    }
     sourceSets {
         main {
             jniLibs.srcDirs = ['libs']

example/android/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
+-keepclasseswithmembernames class ** {
+    native <methods>;
+}
+-keepattributes Signature
+-keep class sun.misc.Unsafe { *; }
+-keep class com.taobao.** {*;}
+-keep class com.alibaba.** {*;}
+-keep class com.alipay.** {*;}
+-keep class com.ut.** {*;}
+-keep class com.ta.** {*;}
+-keep class anet.**{*;}
+-keep class anetwork.**{*;}
+-keep class org.android.spdy.**{*;}
+-keep class org.android.agoo.**{*;}
+-keep class android.os.**{*;}
+-keep class org.json.**{*;}
+-dontwarn com.taobao.**
+-dontwarn com.alibaba.**
+-dontwarn com.alipay.**
+-dontwarn anet.**
+-dontwarn org.android.spdy.**
+-dontwarn org.android.agoo.**
+-dontwarn anetwork.**
+-dontwarn com.ut.**
+-dontwarn com.ta.**
+
+# 小米通道
+-keep class com.xiaomi.** {*;}
+-dontwarn com.xiaomi.**
+
+# 华为通道
+-keep class com.huawei.** {*;}
+-dontwarn com.huawei.**
+
+# 荣耀通道
+-ignorewarnings
+-keepattributes *Annotation*
+-keepattributes Exceptions
+-keepattributes InnerClasses
+-keepattributes Signature
+-keepattributes SourceFile,LineNumberTable
+
+# VIVO通道
+-keep class com.vivo.** {*;}
+-dontwarn com.vivo.**
+
+# OPPO通道
+-keep public class * extends android.app.Service
+
+
+#定位
+-keep class com.amap.api.location.**{*;}
+-keep class com.amap.api.fence.**{*;}
+-keep class com.loc.**{*;}
+-keep class com.autonavi.aps.amapapi.model.**{*;}
+
+#搜索
+-keep class com.amap.api.services.**{*;}
+
+#2D地图
+-keep class com.amap.api.maps2d.**{*;}
+-keep class com.amap.api.mapcore2d.**{*;}
+
+#3D地图 V5.0.0之后： 
+-keep class com.amap.api.maps.**{*;}
+-keep class com.autonavi.**{*;}
+-keep class com.amap.api.trace.**{*;}
+
+#导航 V8.1.0及以后：
+-keep class com.amap.api.navi.**{*;}
+-keep class com.alibaba.idst.nui.* {*;}
+-keep class com.google.**{*;}
+#友盟统计 V8.1.0及以后：
+-keep class com.umeng.** {*;}
+
+-keep class org.repackage.** {*;}
+
+-keepclassmembers class * {
+   public <init> (org.json.JSONObject);
+}
+
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+#人脸识别
+-keep class com.alipay.deviceid.** { *; }
+-keep class net.security.device.api.** {*;}
+-keep class org.json.** { *;}
+-keep class com.alibaba.fastjson.** {*;}
+-keep class com.alibaba.sdk.android.oss.** { *; }
+
+-dontwarn okio.**
+-dontwarn org.apache.commons.codec.binary.**
+
+-keepclassmembers,allowobfuscation class * {
+@com.alibaba.fastjson.annotation.JSONField <fields>;
+}
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