Android WebView 不支持 H5 input type="file" 解决方法

最近因为赶项目进度，因此将本来要用原生控件实现的界面，自己做了h5并嵌入webview中。发现点击h5中 input type="file" 标签 不能打开android资源管理器。

通过网络搜索发现是因为 android webview 由于考虑安全原因屏蔽了 input type="file" 这个功能 。

经过不懈的努力，以及google 翻译的帮助 在 * 中找到了解决的方法。

具体可以理解为 重写webview 的webchromeclient ，废话不多说直接贴代码:

private valuecallback<uri> muploadmessage;
public valuecallback<uri[]> uploadmessage;
public static final int request_select_file = 100;
private final static int filechooser_resultcode = 2;
webview.setwebchromeclient(new webchromeclient(){
    // for 3.0+ devices (start)
    // onactivityresult attached before constructor
    protected void openfilechooser(valuecallback uploadmsg, string accepttype)
    {
      muploadmessage = uploadmsg;
      intent i = new intent(intent.action_get_content);
      i.addcategory(intent.category_openable);
      i.settype("image/*");
      startactivityforresult(intent.createchooser(i, "file browser"), filechooser_resultcode);
    }
    // for lollipop 5.0+ devices
    @targetapi(build.version_codes.lollipop)
    public boolean onshowfilechooser(webview mwebview, valuecallback<uri[]> filepathcallback, webchromeclient.filechooserparams filechooserparams)
    {
      if (uploadmessage != null) {
        uploadmessage.onreceivevalue(null);
        uploadmessage = null;
      }
      uploadmessage = filepathcallback;
      intent intent = filechooserparams.createintent();
      try
      {
        startactivityforresult(intent, request_select_file);
      } catch (activitynotfoundexception e)
      {
        uploadmessage = null;
        toast.maketext(getbasecontext(), "cannot open file chooser", toast.length_long).show();
        return false;
      }
      return true;
    }
    //for android 4.1 only
    protected void openfilechooser(valuecallback<uri> uploadmsg, string accepttype, string capture)
    {
      muploadmessage = uploadmsg;
      intent intent = new intent(intent.action_get_content);
      intent.addcategory(intent.category_openable);
      intent.settype("image/*");
      startactivityforresult(intent.createchooser(intent, "file browser"), filechooser_resultcode);
    }
    protected void openfilechooser(valuecallback<uri> uploadmsg)
    {
      muploadmessage = uploadmsg;
      intent i = new intent(intent.action_get_content);
      i.addcategory(intent.category_openable);
      i.settype("image/*");
      startactivityforresult(intent.createchooser(i, "file chooser"), filechooser_resultcode);
    }
  });
}
@override
public void onactivityresult(int requestcode, int resultcode, intent intent)
{
  if(build.version.sdk_int >= build.version_codes.lollipop)
  {
    if (requestcode == request_select_file)
    {
      if (uploadmessage == null)
        return;
      uploadmessage.onreceivevalue(webchromeclient.filechooserparams.parseresult(resultcode, intent));
      uploadmessage = null;
    }
  }
  else if (requestcode == filechooser_resultcode)
  {
    if (null == muploadmessage)
      return;
    // use mainactivity.result_ok if you're implementing webview inside fragment
    // use result_ok only if you're implementing webview inside an activity
    uri result = intent == null || resultcode != mainactivity.result_ok ? null : intent.getdata();
    muploadmessage.onreceivevalue(result);
    muploadmessage = null;
  }
  else
    toast.maketext(getbasecontext(), "failed to upload image", toast.length_long).show();
}

以上所述是小编给大家介绍的android webview 不支持 h5 input type="file" 解决方法，希望对大家有所帮助