Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams : <p>I'm getting Multiple dex files define error in my project.</p>

<p>I'm using these two tags in <strong>build.gradle</strong> as well</p>

<pre><code>dexOptions {
    preDexLibraries = false
}
defaultConfig {
    multiDexEnabled true

}
</code></pre>

<p>but still getting this error.</p>

<pre><code>   Information:Gradle tasks [:app:assembleDebug]
Error:Error converting bytecode to dex:
Cause: com.android.dex.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;
Error:com.android.dex.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;
Error:  at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:661)
Error:  at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:616)
Error:  at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:598)
Error:  at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:171)
Error:  at com.android.dx.merge.DexMerger.merge(DexMerger.java:198)
Error:  at com.android.builder.dexing.DexArchiveMergerCallable.call(DexArchiveMergerCallable.java:61)
Error:  at com.android.builder.dexing.DexArchiveMergerCallable.call(DexArchiveMergerCallable.java:36)
Error:  at java.util.concurrent.ForkJoinTask$AdaptedCallable.exec(ForkJoinTask.java:1424)
Error:  at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
Error:  at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
Error:  at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
Error:  at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Error:Execution failed for task ':app:transformDexArchiveWithDexMergerForDebug'.
&gt; com.android.build.api.transform.TransformException: com.android.dex.DexException: Multiple dex files define Landroid/support/design/widget/CoordinatorLayout$LayoutParams;
</code></pre>
