Biodam

This happens because the Facebook login through Facebook app on Android needs the correct hash of your Google Play Signing key.

Follow the steps from "B" on this post: https://forum.unity.com/threads/solved-problem-with-login-facebook-sdk-android.257482/#post-1709450
Copy paste here if the link goes offline:
B) The "Key Hash" generated in the Unity Engine was wrong. So, now I am generating the Key Hash through the steps:
1. Unzip .apk file and extract META-INF\CERT.RSA file
2. In the Prompt, run: keytool -printcert -file CERT.RSA
3. notice SHA1 bytes are printed like 29:37:F1:CB:06…
4. copy SHA1 bytes into HEX to BASE64 converter (http://tomeko.net/online_tools/hex_to_base64.php)
5. see your BASE64 key hash in output field

Biodam

using UnityEngine;
using System.Collections;
using UnityEditor;
using UnityEditor.Presets;
using System;

[CreateAssetMenu(fileName = "PreBuild", menuName = "Data/CI/PreBuild")]
public class PreBuild : ScriptableObject
{
    [Serializable]

Biodam

using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEditor;
using UnityEngine;
using UnityEditorInternal;

/// <summary>
/// Class to manipulate the gameview sizes.
/// Based on: https://answers.unity.com/questions/956123/add-and-select-game-view-resolution.html

Biodam

using UnityEngine;
using UnityEngine.UI;

/// A concrete subclass of the Unity UI `Graphic` class that just skips drawing.
/// Useful for providing a raycast target without actually drawing anything.
public class NonDrawingGraphic : Graphic
{
    public override void SetMaterialDirty() { return; }
    public override void SetVerticesDirty() { return; }

Biodam

Unity Doc
https://docs.unity3d.com/Manual/SmartMerge.html

Tutorial
https://www.youtube.com/watch?v=EQB-N-ClO9g

Steps:
Install meld: http://meldmerge.org/

Config SourceTree

Biodam

adb install %1

pause