To enable ProGuard in your project, edit the `project.properties` file and define the `proguard.config` property as described in that file. By default, the flags in this file are appended to flags specified in `${sdk.dir}/tools/proguard/proguard-android.txt`. You can edit the include path and order by changing the ProGuard include property in `project.properties`. For more details, see http://developer.android.com/guide/developing/tools/proguard.html.
If your project uses WebView with JavaScript, uncomment the following and specify the fully qualified class name of the JavaScript interface class:
```markdown
-keepclassmembers class fqcn.of.javascript.interface.for.webview {
public *;
}
```