Android StageWebView input file problem?

Android StageWebView  input file problem?

I have form in website

<form action="upload.php"  enctype="multipart/form-data" method="post">

    <input type="file" name="file1" accept="image/*" />

    <input type="submit" name="submit" value="submit" />

</form>

In IOS I click input file in StageWebView. It show ImagePicker for upload fine, It's work.

In Android I click input file in StageWebView. It not happen , It's not work!! (Android 4.x.x I try more device...it same not work all)

But I change to test my page in android browser. It work , it show list program  open file for upload.

Question : In Android I cannot upload file from website by StageWebView? or It can do that but use other solution?

Please help me.

Thanks.