从 Unity 中的 Android Studio 读取意图

我有一个 Unity 游戏导出到 Android Studio 中。我有一个已保存游戏的列表，其中存储了玩家玩的每个游戏的最后一个场景。基本上存储玩家的进度。

从 Unity 到 Android Studio 播放的最后一个场景的编写效果非常好。但是，我不知道如何在Unity中从Android Studio读取。我有一个 putExtra 意图，应该将场景索引传递到 Unity，但我不知道如何。我还应该提到这个java脚本是我编写的唯一一个，这意味着我没有这里未提及的其他方法。

我在网上找到了一个代码可以做到这一点，但我不知道如何修改它，以便它可以与我的 Java 脚本一起使用。如果有人可以提供帮助，我将非常感激！

我的 Java 脚本（在 Android Studio 中）：

    public class MainActivity extends AppCompatActivity {
    private int lastscene = 99;
    Button btnstart;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


//gets the PlayerPrefs from Unity
        SharedPreferences sharedPreferences = getSharedPreferences(getPackageName() + ".v2.playerprefs", Context.MODE_PRIVATE);

//Saves the last played scene (which is stores in the PlayerPrefs we got) in "lastscene"
        lastscene = sharedPreferences.getInt("Scene",99);

//The reading from Unity works! Toasts the last played scene when you open the Android Studio app
        Toast.makeText(getApplicationContext(), ""+lastscene,
                Toast.LENGTH_LONG).show();

        btnstart = (Button) findViewById(R.id.btnstart);

//Once you press the button, Unity should open and start playing from the last scene that we saved into Android Studio.
        btnstart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(MainActivity.this, UnityPlayerActivity.class);
                i.putExtra("listScene", lastscene);
                startActivity(i);
            }
        });
       }
    }

我在网上找到的 C#，但不知道如何使其工作（Unity）：

    private void Awake () 
    {
    getIntentData ();
}

private bool getIntentData () {
#if (!UNITY_EDITOR && UNITY_ANDROID)
    return CreatePushClass (new AndroidJavaClass ("com.unity3d.player.UnityPlayer"));
#endif
    return false;
}

public bool CreatePushClass (AndroidJavaClass UnityPlayer) {
#if UNITY_ANDROID
    AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject> ("currentActivity");
    AndroidJavaObject intent = currentActivity.Call<AndroidJavaObject> ("getIntent");
    AndroidJavaObject extras = GetExtras (intent);

    if (extras != null) {
        string ex = GetProperty (extras, "listScene");
        return true;
    }
#endif
    return false;
}

private AndroidJavaObject GetExtras (AndroidJavaObject intent) {
    AndroidJavaObject extras = null;

    try {
        extras = intent.Call<AndroidJavaObject> ("getExtras");
    } catch (Exception e) {
        Debug.Log (e.Message);
    }

    return extras;
}

private string GetProperty (AndroidJavaObject extras, string name) {
    string s = string.Empty;

    try {
        s = extras.Call<string> ("getString", name);
    } catch (Exception e) {
        Debug.Log (e.Message);
    }

    return s;
}

感谢我从哪里获取 Unity 脚本：Credit https://stackoverflow.com/questions/36098400/read-android-intent-extra-data-on-unity-app-launch/65092095#65092095

下面是如何按意图将字符串从 Android 传递到 Unity 并将其显示到文本网格组件中的示例。

using System;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;

public class TextBehaviour : MonoBehaviour {


[SerializeField] TextMeshProUGUI textMesh; // Drag component
private string stringFromAndroid = string.Empty;

private void Awake()
{
    getIntentData();
}

// Start is called before the first frame update
void Start()
{
    textMesh.text = stringFromAndroid;
}

// Update is called once per frame
void Update()
{
}

private bool getIntentData()
{
    return CreatePushClass (new AndroidJavaClass ("com.unity3d.player.UnityPlayer"));
}


public bool CreatePushClass(AndroidJavaClass UnityPlayer)
{
    AndroidJavaObject currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
    AndroidJavaObject intent = currentActivity.Call<AndroidJavaObject>("getIntent");
    AndroidJavaObject extras = GetExtras(intent);

    if (extras != null)
    {
        stringFromAndroid = GetProperty(extras, "Literal"); // Use same as intent extra key
        return true;
    }
    return false;
}

private AndroidJavaObject GetExtras(AndroidJavaObject intent)
{
    AndroidJavaObject extras = null;

    try
    {
        extras = intent.Call<AndroidJavaObject>("getExtras");
    }
    catch (Exception e)
    {
        Debug.Log(e.Message);
    }

    return extras;
}

private string GetProperty(AndroidJavaObject extras, string name)
{
    string s = string.Empty;

    try
    {
        s = extras.Call<string>("getString", name);
    }
    catch (Exception e)
    {
        Debug.Log(e.Message);
    }

    return s;
}
}

这是活动调用

class UnityActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val intent = Intent(this, UnityPlayerActivity::class.java)
    intent.putExtra("Literal", "I am a string from Android")
    startActivity(intent)
}

}