Unity/多言語化のソースを表示

==ダウンロード==
https://learn.unity.com/tutorial/recorded-video-session-localization-tools/?tab=detail#5c7f8528edbc2a002053b671
<pre>
LocalizationData.cs
LocalizationManager.cs
StartupManager.cs
LocalizedText.cs
LocalizedTextEditor.cs
</pre>

==翻訳ファイルサンプル==
AndroidでStreamingAssetsが取得できなかったので、Resourcesに入れた。

Assets/Resources/Localization/ja.json
<pre>
{
  "items":[
    {"key":"title","value":"タイトル1"},
    {"key":"edit","value":"編集1"}
  ]
}
</pre>
Assets/Resources/Localization/en.json
<pre>
{
  "items":[
    {"key":"title","value":"title1"},
    {"key":"edit","value":"edit1"}
   ]
}
</pre>

==上記DLしたファイル設定==
端末言語を自動で判定し翻訳するようにカスタマイズしてあります。
指定することもできます。（下の項目でやり方記載）

LocalizationData.cs
<pre>
[System.Serializable]
public class LocalizationData
{
    public LocalizationItem[] items;
}

[System.Serializable]
public class LocalizationItem
{
    public string key;
    public string value;
}
</pre>
LocalizationManager.cs
<pre>
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;

public class LocalizationManager : MonoBehaviour {

    public static LocalizationManager instance;

    private Dictionary<string, string> localizedText;
    private bool isReady = false;
    private string missingTextString = "Localized text not found";

    // Use this for initialization
    void Awake () 
    {
        if (instance == null) {
            instance = this;
        } else if (instance != this)
        {
            Destroy (gameObject);
        }
        DontDestroyOnLoad (gameObject);
    }
    public void LoadLocalizedText(string fileName)
    {
        LoadAsset(fileName);
    }

    public void LoadAsset(string fileName)
    {
        string filePath = Path.Combine("Localization", fileName);
        filePath = filePath.Replace(".json", "");
        string dataAsJson = Resources.Load<TextAsset>(filePath).text;
        LoadJson(dataAsJson);
    }
    private void LoadJson(string dataAsJson)
    {
        localizedText = new Dictionary<string, string>();
        LocalizationData loadedData = JsonUtility.FromJson<LocalizationData>(dataAsJson);

        for (int i = 0; i < loadedData.items.Length; i++)
        {
            localizedText.Add(loadedData.items[i].key, loadedData.items[i].value);
        }

        Debug.Log("Data loaded, dictionary contains: " + localizedText.Count + " entries");
        isReady = true;
    }

    public string GetLocalizedValue(string key)
    {
        string result = missingTextString;
        if (localizedText.ContainsKey (key)) 
        {
            result = localizedText [key];
        }
        return result;
    }

    public bool GetIsReady()
    {
        return isReady;
    }
    public void LoadLanguageTerminal()
    {
        var lang = Application.systemLanguage;
        string filename = "";
        if (lang == SystemLanguage.Japanese)
        {
            filename = "ja.json";
        }
        else if (lang == SystemLanguage.ChineseSimplified)
        {
            // 簡体字
            filename = "zh-CN.json";
        }
        else if (lang == SystemLanguage.ChineseTraditional)
        {
            // 繁体字
            filename = "zh-TW.json";
        }
        else if (lang == SystemLanguage.Vietnamese)
        {
            filename = "vi.json";
        }
        else if (lang == SystemLanguage.Dutch)
        {
            filename = "de.json";
        }
        else if (lang == SystemLanguage.Korean)
        {
            filename = "ko.json";
        }
        else if (lang == SystemLanguage.Spanish)
        {
            filename = "es.json";
        }
        else
        {
            filename = "en.json";
        }
        LoadLocalizedText(filename);
    }
    public void LoadLanguage(string lang)
    {
        if (!lang.Equals("terminal"))
        {
            LoadLocalizedText(lang + ".json");
        }
    }
}
</pre>
LocalizedText.cs
<pre>
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class LocalizedText : MonoBehaviour {

    public string key;

    void Start () 
    {
        Text text = GetComponent<Text> ();
        LocalizationManager manager = LocalizationManager.instance;
        if (manager == null)
        {
            return;
        }
        string str = manager.GetLocalizedValue(key);
        if (str == null)
        {
            return;
        }
        Debug.Log("LocalizedText key=" + key);
        text.text = str;
    }

}
</pre>
LocalizedTextEditor.cs
<pre>
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using System.IO;

public class LocalizedTextEditor : EditorWindow
{
    public LocalizationData localizationData;

    [MenuItem ("Window/Localized Text Editor")]
    static void Init()
    {
        EditorWindow.GetWindow (typeof(LocalizedTextEditor)).Show ();
    }

    private void OnGUI()
    {
        if (localizationData != null) 
        {
            SerializedObject serializedObject = new SerializedObject (this);
            SerializedProperty serializedProperty = serializedObject.FindProperty ("localizationData");
            EditorGUILayout.PropertyField (serializedProperty, true);
            serializedObject.ApplyModifiedProperties ();

            if (GUILayout.Button ("Save data")) 
            {
                SaveGameData ();
            }
        }

        if (GUILayout.Button ("Load data")) 
        {
            LoadGameData ();
        }

        if (GUILayout.Button ("Create new data")) 
        {
            CreateNewData ();
        }
    }

    private void LoadGameData()
    {
        string filePath = EditorUtility.OpenFilePanel ("Select localization data file", Application.streamingAssetsPath, "json");

        if (!string.IsNullOrEmpty (filePath)) 
        {
            string dataAsJson = File.ReadAllText (filePath);
            localizationData = JsonUtility.FromJson<LocalizationData> (dataAsJson);
        }
    }

    private void SaveGameData()
    {
        string filePath = EditorUtility.SaveFilePanel ("Save localization data file", Application.streamingAssetsPath, "", "json");

        if (!string.IsNullOrEmpty(filePath))
            {
                string dataAsJson = JsonUtility.ToJson(localizationData);
                File.WriteAllText (filePath, dataAsJson);
            }
    }

    private void CreateNewData()
    {
        localizationData = new LocalizationData ();
    }
}
</pre>

StartupManager.cs
<pre>
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

[DefaultExecutionOrder(-1)]
public class StartupManager : MonoBehaviour {

    // Use this for initialization
    private IEnumerator Start () 
    {
        LocalizationManager.instance.LoadLanguageTerminal();
        while (!LocalizationManager.instance.GetIsReady ()) 
        {
            yield return null;
        }
    }

}
</pre>


==設置方法==
#起動sceneに適当に空のGameObjectを作る
#そこにLocalizationManagerとStartupManagerを貼り付ける
#翻訳したいTextオブジェクトにAddComponentsでLocalizedTextを選択しKeyにjsonのkeyに指定したtitle1などと入れる。

無事翻訳できた。

==初回sceneで翻訳されない場合==
StartupManagerのクラスの上に[DefaultExecutionOrder(-1)]を記述して実行順をどのsceneよりも早くロードするように

 [DefaultExecutionOrder(-1)]
 public class StartupManager : MonoBehaviour {

==手動で切り替え==
手動でやりたい場合は以下のようにすると良い。
 LocalizationManager.instance.LoadLanguage("ja");

==Androidのアプリタイトルの多言語化==
Assets/Plugins/Android/res/values-ja/strings.xml
<pre>
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">タイトル1</string>
</resources>
</pre>

==Androidの場合は読み込めない==
StreamingAssetsではAndroidの場合は読み込めないのでResourcesに移動してある

参考：https://teratail.com/questions/169361

==参考==
https://www.growthsoftware.jp/unity-multilang/

https://qiita.com/chocho/items/c32e75bf498d8beec08f