Android 4.4 WebView file chooser not opening?

Question

We are creating an app which uses the webview and will access a page where the user needs to upload a file. We are experiencing problems with Android 4.4 where the file choo

Answer 1

What I have done to fix this problem it is to implement CrossWalk into my project. I know the size of CrossWalk is significant (adds Chromium to your project) but I really needed this to work fine inside a native app. I documented how I implemented this in here: http://maurizionapoleoni.de/blog/implementing-a-file-input-with-camera-support-in-android-with-crosswalk/

Answer 2

You need to implement a WebviewClient class. You can check these example .

webview.setWebViewClient(new myWebClient());

The web.setWebChromeClient(new WebChromeClient() {
//
}

Create class called mywebClient and add the following code to implement onPageStarted() function, shouldOvverideLoading() function and onActivityresult() function as shown below.

public class myWebClient extends WebViewClient { 


     @Override
     public void onPageStarted(WebView view, String url, Bitmap favicon) { 
             super.onPageStarted(view, url, favicon);
     }

     @Override

     public boolean shouldOverrideUrlLoading(WebView view, String url) {       

        view.loadUrl(url);
       return true; 
     }

     @Override 
    public void onPageFinished(WebView view, String url) {   
        super.onPageFinished(view, url); 
    } 
 }

 //flipscreen not loading again

 @Override

 public void onConfigurationChanged(Configuration newConfig){  
       super.onConfigurationChanged(newConfig);

 } 

@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; 

  } 

}

Download demo

Answer 3

Found a solution that worked for me. I've added one more rule in proguard-android.txt:

-keepclassmembers class * extends android.webkit.WebChromeClient {
     public void openFileChooser(...);
}