廢話不多直接上代碼

 public static List<string> GetAllApk()
    {
        List<string> apks = new List<string> ();
#if UNITY_ANDROID
        try
        {
            AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject currentActivity = up.GetStatic<AndroidJavaObject>("currentActivity");
            AndroidJavaObject packageManager = currentActivity.Call<AndroidJavaObject>("getPackageManager");
            AndroidJavaObject packageInfos = packageManager.Call<AndroidJavaObject>("getInstalledPackages", 0);
            AndroidJavaObject[] packages = packageInfos.Call<AndroidJavaObject[]>("toArray");
            for (int i = 0; i < packages.Length;i++ )
            {
                AndroidJavaObject applicationInfo = packages[i].Get<AndroidJavaObject>("applicationInfo");
                if ((applicationInfo.Get<int>("flags") & applicationInfo.GetStatic<int>("FLAG_SYSTEM")) == 0)// 判斷是不是系統(tǒng)應用
                {
                    string packageName = applicationInfo.Get<string>("packageName");
                    AndroidJavaObject applicationLabel = packageManager.Call<AndroidJavaObject>("getApplicationLabel", applicationInfo);
                    string packageLable = applicationLabel.Call<string>("toString");
                    apks.Add(packageLable + "|" + packageName);
                }
            }
        }
        catch (System.Exception e)
        {
        }
#endif
        return apks;
    }