Android Webview - Upload

Question

I have seen the solution mentioned here, but I can't figure out, how to make it work with my code. Here is the code (displaying simple page with file upload). My app should compatible with Android 2.3-4.1

package com.myapp.test;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.CookieSyncManager;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {
    @Override
    public void onBackPressed() {
    }   
    
    private ValueCallback<Uri> mUploadMessage;
    private final static int FILECHOOSER_RESULTCODE = 1;

    @Override
    protected void onActivityResult(int requestCode, int resultCode,
            Intent intent) {
        if (requestCode == FILECHOOSER_RESULTCODE) {
            if (null == mUploadMessage)
                return;
            Uri result = intent == null || resultCode != RESULT_OK ? null
                    : intent.getData();
            mUploadMessage.onReceiveValue(result);
            mUploadMessage = null;

        }
    }
    
    
    private WebView webView;
    

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);
        CookieSyncManager.createInstance(this);
        CookieSyncManager.getInstance().startSync();
        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setJavaScriptEnabled(true);
        //webView.getSettings().setUserAgentString("Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) version/4.0.4 Mobile/7B367 Safari/531.21.10");
         webView.setWebChromeClient(new WebChromeClient()
          {
                 //The undocumented magic method override
                 //Eclipse will swear at you if you try to put @Override here
                 public void openFileChooser(ValueCallback<Uri> uploadMsg) {
                 
                  mUploadMessage = uploadMsg;
                  Intent i = new Intent(Intent.ACTION_GET_CONTENT);
                  i.addCategory(Intent.CATEGORY_OPENABLE);
                  i.setType("image/*");
                  MainActivity.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FILECHOOSER_RESULTCODE);
           
                 }
          });
        
        webView.loadUrl("http://encodable.com/uploaddemo/");
        webView.setWebViewClient(new MyWebViewClient());
        }
    private class MyWebViewClient extends WebViewClient {
         @Override
         public boolean shouldOverrideUrlLoading(WebView view, String url) {
            return false;
        }

    }
    
    class MyWebChromeClient extends WebChromeClient {
        // The undocumented magic method override
        // Eclipse will swear at you if you try to put @Override here
        public void openFileChooser(ValueCallback<Uri> uploadMsg) {

            mUploadMessage = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("image/*");
            MainActivity.this.startActivityForResult(
                    Intent.createChooser(i, "Image Browser"),
                    FILECHOOSER_RESULTCODE);
        }

}
    
}

I am not able to get the filechooser to open.

Any ideas? I am kind of hopeless, I am doing something wrong...