Gradle sync failed: Cause: compileSdkVersion is not specified

问题

I am trying to test my ionic app in android studio. It is throwing the below error.

Gradle sync failed: Cause: compileSdkVersion is not specified.

Any solution for this ? What am I doing wrong.

Here is my build.gradle file

apply plugin: 'com.android.application'

buildscript {
    repositories {
        mavenCentral()
        jcenter()
        maven {
            url "https://maven.google.com"
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
    }
}

// Allow plugins to declare Maven dependencies via build-extras.gradle.

allprojects {
    repositories {
        mavenCentral();
        jcenter()
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '4.1.0'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:+'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:+'
    implementation 'com.android.support:appcompat-v7:27.+'
}

回答1:

You are using android support library of 27.+ so you will have to give sdk version 27 as compileSdkVersion and targetSdkVersion otherwise your project does not know for which platform your project should be built. These parameter should be given in android directory like this in build.gradle(app):

android {
    compileSdkVersion 27
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId "com.example.abc.test"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

Just paste this code below apply plugin: 'com.android.application' this line

回答2:

Please Add Below Line in your gradle file

  compileSdkVersion 26

please check below code for reference

android {
        compileSdkVersion 26
        buildToolsVersion '27.0.3'

        defaultConfig {
            applicationId ""
            minSdkVersion 15
            targetSdkVersion 26
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled true
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }

    }

回答3:

Note: There was an error in my app/build.gradle, hence it was not reading compileSDKVersion property. When I commented such a line, the error went away:

//def enableHermes = project.ext.react.get("enableHermes", false);

Firstly I got to follow this link:

ReactNative: Building from source

Then this:

ReactNative: android-development-environment

Then you can have this added in your settings.gradle file:

//
include ':ReactAndroid'
//
project(':ReactAndroid').projectDir = new File(
    rootProject.projectDir, '../node_modules/react-native/ReactAndroid')

For my ReactViro Sample project I also had to add dependencies from react-native node_modules directory:

    implementation project(':arcore_client') // remove this if AR not required
    implementation project(':gvr_common')
    implementation project(path: ':viro_renderer')
    implementation project(path: ':react_viro')

and

in my settings.gradle:

//
include ':react_viro', ':arcore_client', ':gvr_common', ':viro_renderer'
project(':arcore_client').projectDir = new File('../node_modules/react-viro/android/arcore_client')
project(':gvr_common').projectDir = new File('../node_modules/react-viro/android/gvr_common')
project(':viro_renderer').projectDir = new File('../node_modules/react-viro/android/viro_renderer')
project(':react_viro').projectDir = new File('../node_modules/react-viro/android/react_viro')
//

回答4:

if you are using hermes make sure you use react native version 0.60+

来源：https://stackoverflow.com/questions/50530889/gradle-sync-failed-cause-compilesdkversion-is-not-specified

标签

android

cordova

ionic-framework