化石原创文章，转载请注明来源并保留原文链接

	string path;

	void Start () {
		path = "/storage/emulated/0/Android/data/test.apk";
		Debug.Log (path);

		GameObject.Find ("Canvas/Button").GetComponent<Button> ().onClick.AddListener (OnClick);
	}
	
	// Update is called once per frame
	void OnClick () {
		installApp (path);
	}

	public bool installApp(string apkPath)
	{
		try
		{
			AndroidJavaClass intentObj = new AndroidJavaClass("android.content.Intent");
			string ACTION_VIEW = intentObj.GetStatic<string>("ACTION_VIEW");
			int FLAG_ACTIVITY_NEW_TASK = intentObj.GetStatic<int>("FLAG_ACTIVITY_NEW_TASK");
			AndroidJavaObject intent = new AndroidJavaObject("android.content.Intent", ACTION_VIEW);

			AndroidJavaObject fileObj = new AndroidJavaObject("java.io.File", apkPath);
			AndroidJavaClass uriObj = new AndroidJavaClass("android.net.Uri");
			AndroidJavaObject uri = uriObj.CallStatic<AndroidJavaObject>("fromFile", fileObj);

			intent.Call<AndroidJavaObject>("setDataAndType", uri, "application/vnd.android.package-archive");
			intent.Call<AndroidJavaObject>("addFlags", FLAG_ACTIVITY_NEW_TASK);
			intent.Call<AndroidJavaObject>("setClassName", "com.android.packageinstaller", "com.android.packageinstaller.PackageInstallerActivity");

			AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
			AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
			currentActivity.Call("startActivity", intent);

			GameObject.Find("TextDebug").GetComponent<Text>().text = "Success";
			return true;
		}
		catch (System.Exception e)
		{
			GameObject.Find("TextDebug").GetComponent<Text>().text = "Error: " + e.Message;
			return false;
		}
	}

方法installApp能通过android安装指定路径下的apk。跑起来后，如果apk存在，会弹出对话框，让用户确认安装；安装完毕，会弹出对话框让用户选择“完成”还是“打开”。

API 24以上：

//For API 24 and above
private bool installApp(string apkPath)
{
    bool success = true;
    GameObject.Find("TextDebug").GetComponent<Text>().text = "Installing App";

    try
    {
        //Get Activity then Context
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        AndroidJavaObject unityContext = currentActivity.Call<AndroidJavaObject>("getApplicationContext");

        //Get the package Name
        string packageName = unityContext.Call<string>("getPackageName");
        string authority = packageName + ".fileprovider";

        AndroidJavaClass intentObj = new AndroidJavaClass("android.content.Intent");
        string ACTION_VIEW = intentObj.GetStatic<string>("ACTION_VIEW");
        AndroidJavaObject intent = new AndroidJavaObject("android.content.Intent", ACTION_VIEW);


        int FLAG_ACTIVITY_NEW_TASK = intentObj.GetStatic<int>("FLAG_ACTIVITY_NEW_TASK");
        int FLAG_GRANT_READ_URI_PERMISSION = intentObj.GetStatic<int>("FLAG_GRANT_READ_URI_PERMISSION");

        //File fileObj = new File(String pathname);
        AndroidJavaObject fileObj = new AndroidJavaObject("java.io.File", apkPath);
        //FileProvider object that will be used to call it static function
        AndroidJavaClass fileProvider = new AndroidJavaClass("android.support.v4.content.FileProvider");
        //getUriForFile(Context context, String authority, File file)
        AndroidJavaObject uri = fileProvider.CallStatic<AndroidJavaObject>("getUriForFile", unityContext, authority, fileObj);

        intent.Call<AndroidJavaObject>("setDataAndType", uri, "application/vnd.android.package-archive");
        intent.Call<AndroidJavaObject>("addFlags", FLAG_ACTIVITY_NEW_TASK);
        intent.Call<AndroidJavaObject>("addFlags", FLAG_GRANT_READ_URI_PERMISSION);
        currentActivity.Call("startActivity", intent);

        GameObject.Find("TextDebug").GetComponent<Text>().text = "Success";
    }
    catch (System.Exception e)
    {
        GameObject.Find("TextDebug").GetComponent<Text>().text = "Error: " + e.Message;
        success = false;
    }

    return success;
}

化石原创文章，转载请注明来源并保留原文链接

化石原创文章，转载请注明来源并保留原文链接

在Unity中显示网页，无论是在线的、本地的（需要放置在persistentPath或者streamingAssets中），UniWebView的确是个很好的东西。

测试下来，如果是本地的网页，即使图片数量很大，进入速度也非常快（android，iOS未测）。在显示时候的拖拽也非常顺利。

支持在屏幕指定的矩形范围内绘制（设置intents的top、bottom、left、right）。

图片会原图大小显示，如果超出可显示范围，能左右拖动也只能这样支持。

化石原创文章，转载请注明来源并保留原文链接