Sharing url to facebook from cross platform mobile app - Random Folder - android

I have a simple cordova app that has a facebook share button that shares a url to facebook. Facebook is putting in a random photo when the mobile facebook page opens. How do I replace this?
EDIT::: It has been suggested i use og:image to show an image. I did this, but it doesn't seem to be carrying through? Any thoughts? Is this due to using Cordova vs Java somehow?

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generate QR code to open facebook app to my business page

I want to generate a QR code to open the Facebook app to show my Facebook page on both android and iPhone
I found the urls it needs to be but is different for android and iPhone so was seeing if anyone knows if there is a url that works on both android and iPhone to open the Facebook app to my Facebook page?
Whats the url you got?
I never heard about facebook having different domains for ios and android.
I found a url that works on both android and ios. I now have fb://profile/pageid and I tested it on android and ios and it opens the app on both platforms after scanning the QR code

Sharing OneLink.to URL to Facebook directs to Android only

On this very moment we are working on an application that has an embedded onelink link. It directs people from the game directly to Facebook through the Facebook SDK Sharelink function in Unity3d.
When we share this link on Facebook it only shows the Android link, while we want it to show the onelink as the crossplatform link it’s supposed to be.
We are using the Unity3d FacebookSDK Plugin.
For more information about Onelink go to: OneLink
Thanks for your help in advance,
Menno
You need to have both an iOS download URL and Android download URL for the fallback to be considered.

Facebook share button on android issue

I have a web page that contains a Facebook share button.
The link it shares is in following format:
www.example.com/index?id=1234&info=56789
This link is shared using Facebook plugin share button. On desktop browsers it works fine but on Android (chrome browser), when clicking the share button , the Facebook app is opened and only "www.example.com/index?id=1234" part of the link is sent to the app for sharing.
I replaced the "&" with "%26" and it fixed it, but it breaks when sharing using on desktop.
Did any one had the same problem and know the solution for this?

How to open native Facebook app and determine the text a user should/could post

I know from here that when I put a fb://... link on my website it opens the native Facebook App (on iPhone and even on Android).
But how is it possible to put some parameters to this link? I want to make a share button, with a text/title/image. The user should be able to review it, but when he is lazy he should also be able just to press "Post it".
EDIT: My App is an webapp, it is just reachable through the browser (PC or mobile) or through an WebView of a native app (iPhone, WindowsPhone, Android).
You should use the native share dialogs with the Facebook SDK.
https://developers.facebook.com/blog/post/2013/07/11/four-reasons-to-upgrade-to-the-new-share-dialog-for-ios/
Here's the iOS documentation: https://developers.facebook.com/docs/ios/share-dialog/
Here's the Android documentation: https://developers.facebook.com/docs/android/share-dialog/

Facebook sdk for android. How to get signed_request?

Is there any way to get signed_request with Facebook sdk for Android. Or the only way is to build it manually?
The signed_request field is POSTed to your server when a user loads your Canvas and Page Tab App on Facebook.com, it's not relevant to native mobile apps

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