[Unity]应用内打开第三方应用

权限声明： 确保你的 AndroidManifest.xml 中声明了必要的权限：

<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"/>

比如我的：因为我应用需要的权限比较多

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.unity3d.player"
          xmlns:tools="http://schemas.android.com/tools">

	<!-- 添加权限声明 -->
	<uses-permission android:name="android.permission.CAMERA" /><!--允许应用访问设备的摄像头-->>
	<uses-permission android:name="android.permission.RECORD_AUDIO" /><!--允许应用访问设备的麦克风进行音频录制-->
	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><!--允许应用写入设备的外部存储（如SD卡）-->
	<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><!--允许应用读取设备的外部存储（如SD卡-->
	<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" /><!--允许应用管理设备的外部存储，包括访问所有文件-->
	<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" /><!--允许应用查询所有已安装的应用的包名-->

	<application>
		<activity android:name="com.unity3d.player.UnityPlayerActivity"
                  android:theme="@style/UnityThemeSelector">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
			<meta-data android:name="unityplayer.UnityActivity" android:value="true" />
		</activity>
	</application>

</manifest>

unity 代码：代码里面有一个示例打开微信LaunchWeChat

using System.Collections.Generic;
using UnityEngine;

public class LaunchOtherAPK :MonoBehaviour
{
    // 替换为目标APK的包名
    private string targetPackage = "com.tencent.mm";

    public Dictionary<string, string> parametersDic = new Dictionary<string, string>
    {
        {"my_parameter", "传递的参数"}
    };

    /// <summary>
    /// 打开外部应用
    /// </summary>
    /// <param name="targetPackage">目标APK的包名</param>
    public void LaunchTargetAPK(string targetPackage)
    {
        this.targetPackage = targetPackage;
        LaunchTargetAPK(parametersDic);
    }
    #region 示例
    /// <summary>
    /// 打开微信应用
    /// </summary>
    public void LaunchWeChat()
    {
        GetInstalledApps();
        if(APKIsExist(targetPackage))
        {
        LaunchTargetAPK(targetPackage);
        }else
        {
            Debug.LogError("微信应用未安装，请先安装微信！");
        }
    }
    #endregion
    private void LaunchTargetAPK(Dictionary<string, string> parameters)
    {
        try
        {
            AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");

            AndroidJavaObject intent = unityActivity.Call<AndroidJavaObject>("getPackageManager").Call<AndroidJavaObject>("getLaunchIntentForPackage", targetPackage);

            if (intent != null)
            {
                // 传递参数
                //intent.Call<AndroidJavaObject>("putExtra", parameterKey, parameterValue);
                foreach (var key in parameters.Keys)
                {
                    intent.Call<AndroidJavaObject>("putExtra", key, parameters[key]);
                }

                unityActivity.Call("startActivity", intent);
            }
            else
            {
                Debug.LogError("Intent is null. Target package may not be installed.");
            }
        }
        catch (AndroidJavaException e)
        {
            Debug.LogError("Error launching APK: " + e.ToString());
        }
    }

    public bool APKIsExist(string packageName)
    {
        try
        {
            AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");

            AndroidJavaObject intent = unityActivity.Call<AndroidJavaObject>("getPackageManager").Call<AndroidJavaObject>("getLaunchIntentForPackage", packageName);

            if (intent != null)
            {
                return true;
            }
            else
            {
                Debug.LogError("Intent is null. Target package may not be installed.");
                return false;
            }
        }
        catch (AndroidJavaException e)
        {
            Debug.LogError("Error launching APK: " + e.ToString());
            return false;

        }
    }
    /// <summary>
    /// 获取接收到的参数
    /// </summary>
    /// <param name="parameterKey"></param>
    public string GetStringExtra(string parameterKey)
    {
        // 获取 Unity 的当前活动
        AndroidJavaClass unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject unityActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity");

        // 获取启动时传递的 Intent
        AndroidJavaObject intent = unityActivity.Call<AndroidJavaObject>("getIntent");

        // 检查 Intent 是否包含指定的参数
        if (intent != null && intent.Call<bool>("hasExtra", parameterKey))
        {
            // 从 Intent 中获取参数值
            string parameterValue = intent.Call<string>("getStringExtra", parameterKey);

            // 处理接收到的参数
            Debug.Log("Received parameter: " + parameterValue);

            // 在这里，你可以使用 parameterValue 进行进一步的逻辑处理
            return parameterValue;
        }
        return "";
    }

    /// <summary>
    /// 打印设备已安装应用的信息
    /// </summary>
    public List<PackageInfo> GetInstalledApps()
    {
        List<PackageInfo> res = new List<PackageInfo>();
        try
        {
            // 获取PackageManager
            AndroidJavaClass packageManagerClass = new AndroidJavaClass("android.content.pm.PackageManager");
            AndroidJavaObject packageManager = new AndroidJavaObject("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity").Call<AndroidJavaObject>("getPackageManager");

            // 获取已安装应用的信息
            const int GET_META_DATA = 0x00000080;
            AndroidJavaObject appsList = packageManager.Call<AndroidJavaObject>("getInstalledApplications", GET_META_DATA);
            int size = appsList.Call<int>("size");

            // 遍历应用列表并打印应用信息
            for (int i = 0; i < size; i++)
            {
                AndroidJavaObject appInfo = appsList.Call<AndroidJavaObject>("get", i);
                string appName = packageManager.Call<string>("getApplicationLabel", appInfo);
                string packageName = appInfo.Get<string>("packageName");

                Debug.Log($"App Name: {appName}, Package Name: {packageName}");

                res.Add(new PackageInfo { appName = appName, packageName = packageName });
            }
        }
        catch (System.Exception e)
        {
            Debug.LogError("Error getting installed apps: " + e.ToString());
        }
        return res;
    }


    public struct PackageInfo
    {
        public string appName;
        public string packageName;
    }
}