Android Target and Compiled SDK version for Android OREO (API26 or API27) : <p>Below is build.gradle </p>

<pre><code>android {
    compileSdkVersion 25
    buildToolsVersion "25.0.0"

    defaultConfig {
        minSdkVersion 18
        targetSdkVersion 21
        versionName "5.3"
..

    }
</code></pre>

<p>But I am able to run the App on Android OREO ( API version 26 or 27 ) 
How this can be possible?
Do I need to change the target SDK version to 26 or 27?</p>
