Android - Activity uses or overrides a deprecated API <p>I have literally created a brand new Android Project on the latest Android Studio. The first thing I did was to add the `Realm' library to the project by adding the following to the gradle file:</p> <pre><code>compile 'io.realm:realm-android:0.80.3' </code></pre> <p>If I try to compile, I get the following error:</p> <pre><code>Note: C:\....\MainActivity.java uses or overrides a deprecated API. </code></pre> <blockquote> <p>Origin 2: C:\Users\Usmaan.gradle\caches\modules-2\files-2.1\io.realm\realm-android\0.80.3\7979d05ba7b919c53766bf98e31aaf0e9feb0590\realm-android-0.80.3.jar Error:duplicate files during packaging of APK C:...\app\build\outputs\apk\app-debug-unaligned.apk Path in archive: META-INF/services/javax.annotation.processing.Processor Origin 1: C:\Users\Usmaan.gradle\caches\modules-2\files-2.1\com.jakewharton\butterknife\6.1.0\63735f48b82bcd24cdd33821342428252eb1ca5a\butterknife-6.1.0.jar You can ignore those files in your build.gradle: android {<br> packagingOptions { exclude 'META-INF/services/javax.annotation.processing.Processor' } Error:Execution failed for task ':app:packageDebug'.</p> <blockquote> <p>Duplicate files copied in APK META-INF/services/javax.annotation.processing.Processor File 1: C:\Users\Usmaan.gradle\caches\modules-2\files-2.1\com.jakewharton\butterknife\6.1.0\63735f48b82bcd24cdd33821342428252eb1ca5a\butterknife-6.1.0.jar File 2: C:\Users\Usmaan.gradle\caches\modules-2\files-2.1\io.realm\realm-android\0.80.3\7979d05ba7b919c53766bf98e31aaf0e9feb0590\realm-android-0.80.3.jar }</p> </blockquote> </blockquote> <p>Any ideas?</p>