解决kotlin demo编译问题

Author: lunaLLLIU

android/f2native/build.gradle

@@ -64,4 +64,18 @@ android {
 
 dependencies {
     compileOnly rootProject.extensions.dependencies.fastjson
+}
+
+publishing {
+    publications {
+        release(MavenPublication) {
+            groupId = 'com.github.antvis'
+            artifactId = 'F2Native'
+            version = '2.1.18'
+
+            afterEvaluate {
+                artifact bundleReleaseAar
+            }
+        }
+    }
 }

demos/android/demos-kotlin/build.gradle

@@ -5,14 +5,12 @@ plugins {
 
 android {
     compileSdk rootProject.extensions.sdks.CompileSDK
-    ndkVersion rootProject.extensions.sdks.ndkVersion
     defaultConfig {
         namespace "com.antgroup.antv.f2.kotlinsamples"
         minSdkVersion rootProject.extensions.sdks.MinSDK
         targetSdkVersion rootProject.extensions.sdks.TargetSDK
         versionCode 1
         versionName "1.0"
-        multiDexEnabled false
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
@@ -21,6 +19,15 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
 }
 
 dependencies {

demos/android/demos-kotlin/src/main/AndroidManifest.xml

@@ -26,7 +26,8 @@
             android:label="@string/title_activity_bridge"
             android:theme="@style/AppTheme" />
 
-        <activity android:name="com.antgroup.antv.f2.kotlinsamples.MainActivity">
+        <activity android:name="com.antgroup.antv.f2.kotlinsamples.MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

demos/android/demos-kotlin/src/main/java/com/antgroup/antv/f2/kotlinsamples/Utils.kt

@@ -12,6 +12,9 @@ object Utils {
     @JvmStatic
     fun loadAssetFile(context: Context, assetFile: String?): String? {
         try {
+            if (assetFile == null){
+                return null
+            }
             val `is` = context.assets.open(assetFile)
             val buf = ByteArray(1024 * 500)
             val output = ByteArrayOutputStream()