Android webview, File upload, crashes when setting result in onActivityResult

Question

In Android webview, when file upload option is clicked, onShowFileChooser is called where intent for user to select file to upload from image gallery is invoked. after selecting file, inside onActivityResult it crashes due to following reason

java.lang.IllegalStateException: Duplicate showFileChooser result
        at org.chromium.android_webview.AwWebContentsDelegateAdapter$2.onReceiveValue(AwWebContentsDelegateAdapter.java:225)
        at org.chromium.android_webview.AwWebContentsDelegateAdapter$2.onReceiveValue(AwWebContentsDelegateAdapter.java:220)
        at com.android.webview.chromium.WebViewContentsClientAdapter$4.onReceiveValue(WebViewContentsClientAdapter.java:1063)
        at com.android.webview.chromium.WebViewContentsClientAdapter$4.onReceiveValue(WebViewContentsClientAdapter.java:1047)

Answer 1

If you override onShowFileChooser and plan on calling filePathCallback to pass results, you must return true from onShowFileChooser which tells the underlying code not to pass a value to filePathCallback.

the true is basically saying "I will handle it"

Documentation: @return true if filePathCallback will be invoked, false to use default handling.

Answer 2

@Override
public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
    mActivity.setValueCallback(filePathCallback);
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.setType("*/*");
    mActivity.startActivityForResult(Intent.createChooser(intent, ""), Final.REQUEST_CODE_ALBUM);
    return true;
}

return true