Create nomedia file in download location

app/src/main/java/com/hippo/ehviewer/EhApplication.java

@@ -39,6 +39,7 @@ import com.hippo.ehviewer.client.data.GalleryDetail;
 import com.hippo.ehviewer.client.data.LargePreviewSet;
 import com.hippo.ehviewer.download.DownloadManager;
 import com.hippo.ehviewer.spider.SpiderDen;
+import com.hippo.ehviewer.ui.CommonOperations;
 import com.hippo.network.StatusCodeException;
 import com.hippo.okhttp.CookieDB;
 import com.hippo.scene.SceneApplication;
@@ -108,6 +109,8 @@ public class EhApplication extends SceneApplication implements Thread.UncaughtEx
             Analytics.start(this);
         }
 
+        CommonOperations.ensureNoMediaFile(Settings.getDownloadLocation());
+
         // Update version code
         try {
             PackageInfo pi= getPackageManager().getPackageInfo(getPackageName(), 0);