combine file upload and connection check in webview android studio

Question

i want to combine 2 things in a simple Webview (android studio):

1 file upload: this took me a few days to find it for version 4.., i'm already there, file upload works!

2 - and here is the problem - i want to add a connection check, so that when there is no internet connection a message comes instead of loading default error page. I already tried implementing the solution in this thread: android - how to prevent webview to load when no internet connection and also used https://github.com/iofirag/couponsAndroidApp/tree/master/app/src/main/java/com/oa/couponswebapp as example...

the code i have so far: (for the file upload in my webpage)

package lafs.test;


import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends Activity {

    WebView web;

    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;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        web = (WebView) findViewById(R.id.webview);


        web = new WebView(this);
        web.getSettings().setJavaScriptEnabled(true);
        web.loadUrl("http://www.mywebsiteurl.com");
        web.setWebViewClient(new myWebClient());
        web.setWebChromeClient(new WebChromeClient()
        {




            public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
                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" ),
                        MainActivity.FILECHOOSER_RESULTCODE );

            }

        });


        setContentView(web);


    }

    public class myWebClient extends WebViewClient
    {
        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            // TODO Auto-generated method stub
            super.onPageStarted(view, url, favicon);
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            // TODO Auto-generated method stub

            view.loadUrl(url);
            return true;

        }

        @Override
        public void onPageFinished(WebView view, String url) {
            // TODO Auto-generated method stub
            super.onPageFinished(view, url);


        }
    }

    //flipscreen not loading again
    @Override
    public void onConfigurationChanged(Configuration newConfig){
        super.onConfigurationChanged(newConfig);
    }



}

can anyone help me with this? thanks

Answer 1

add the class from the example to your project, import this class in the top of your Activity. than use the static function that the class you added contain, in onCreate().

like:

Boolean connection = DetectConnection.checkInternetConnection(this);
if (connection){
    //init webView and redirect user to your upload page by the internet.
}