Android WebView почему не работает камера?

private ValueCallback<Uri[]> uploadMessageAboveL;
private Uri uri;
...
 zwv.setWebChromeClient(new WebChromeClient() {

            @Override
            public boolean onShowFileChooser(WebView view, ValueCallback<Uri[]> filePath, WebChromeClient.FileChooserParams fileChooserParams) {
                uploadMessageAboveL = filePath;
                uri = generateFileUri();
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                startActivityForResult(intent, FILE_CHOOSER_RESULT_CODE);
                return true;
            }
        });
...
 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
...
 Uri[] results = null;
        if (resultCode == Activity.RESULT_OK) {
            results = new Uri[1];
            results[0] = uri;
        }
        uploadMessageAboveL.onReceiveValue(results);
}