Error: cannot find symbol variable LOLLIPOP

问题:

I have seen many examples in different android libraries about detecting if device is LOLLIPOP supported or not. But when I use it in my app, it is throwing the following error:

Error:(20, 60) error: cannot find symbol variable LOLLIPOP

For example my source code is:

static boolean isLollipop() {
    return Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP || Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP_MR1;
}

I am using the latest version of Android Studio with all packages updated and installed.

Error is on this statement:

Build.VERSION_CODES.LOLLIPOP

Also when I check options of VERSION_CODES, LOLLIPOP does not exist in that list.

回答1:

it seems to that you're using old build tools or you're missing some libraries.

I pasted your code into my Android Studio and it works.

Please compare your build.gradle with this one:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23           //THIS GUY
    buildToolsVersion "23.0.2"    //THIS GUY

    defaultConfig {
        applicationId "com.example.piotr.myapplication"
        minSdkVersion 15
        targetSdkVersion 23     //THIS GUY
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1' //THIS GUY
    compile 'com.android.support:design:23.1.1'
}

I've already matched parts which might be important to your code.

Hope it help

回答2:

I pasted Your code it works for my. try comparing Your code with my gradle.build. and let me know if you got rid of that problem or not

    apply plugin: 'com.android.application'

 android {
compileSdkVersion 26           //THIS GUY
buildToolsVersion "26.0.2"    //THIS GUY

defaultConfig {
    applicationId "com.example.piotr.myapplication"
    minSdkVersion 15
    targetSdkVersion 23     //THIS GUY
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

 dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:26.0.2' //THIS GUY
compile 'com.android.support:design:26.0.2'
}

回答3:

Add to build.gradle of module.

api 'com.android.support:support-annotations:27.0.0'