Trying To Run Spark In Android: Methodhandle.invoke And Methodhandle.invokeexact Are Only Supported Starting With Android O

I need to generate a webhook url in android. Initially I tried Spring Framework, but it seems quite difficult to implement and I'm just looking to expose a single webhook url so I

Solution 1:

I've been able to run a Spark server on Android. Here is my build.gradle.

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "com.mycom.appname"
        minSdkVersion 27
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility = 1.8
        targetCompatibility = 1.8
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

    implementation 'com.sparkjava:spark-core:2.9.2'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

We are both using Spark 2.9.2. I'm not too familiar with gradle but I notice that the way we indicate the dependency on it is different (compile "com.sparkjava:spark-core:2.9.2" vs. implementation 'com.sparkjava:spark-core:2.9.2').