问题描述
我找到了Java的代码段.如何在C#Unity中编写这样的代码?
I found snippet for Java. How can I write such a code in C# Unity?
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(Uri.fromFile(new File("link to downloaded file")),"application/vnd.android.package-archive");
startActivity(intent);
推荐答案
您可以构建一个jar/aar插件，然后从C#中调用它.这更容易做到.
You can build a jar/aar plugin and call it from C#. That's more easier to do.
另一种解决方案是使用AndroidJavaObject和AndroidJavaClass直接在没有插件的情况下执行此操作.用AndroidJavaObject和AndroidJavaClass进行此操作需要大量测试才能正确完成.以下是我用来执行此操作的方法.它会先下载一个APK，然后再安装它.
Another solution is to use AndroidJavaObject and AndroidJavaClass to do this directly without a plugin. Doing it with AndroidJavaObject and AndroidJavaClass requires lots of testing to get it right. Below is what I use to do that. It downloads an APK then installs it.
首先创建一个名为"TextDebug" 的UI文本，以便您可以看到在下载/安装过程中发生了什么.如果不这样做，则必须注释掉或删除所有GameObject.Find("TextDebug").GetComponent<Text>().text...代码行.
First of all create a UI text called "TextDebug" so it you will see what's going on during the download/install. If you don't do this you must comment out or remove all the GameObject.Find("TextDebug").GetComponent<Text>().text... line of code.
void Start()
{
StartCoroutine(downLoadFromServer());
}
IEnumerator downLoadFromServer()
{
string url = "http://apkdl.androidapp.baidu.com/public/uploads/store_2/f/f/a/ffaca37aaaa481003d74725273c98122.apk?xcode=854e44a4b7e568a02e713d7b0af430a9136d9c32afca4339&filename=unity-remote-4.apk";
string savePath = Path.Combine(Application.persistentDataPath, "data");
savePath = Path.Combine(savePath, "AntiOvr.apk");
Dictionary<string, string> header = new Dictionary<string, string>();
string userAgent = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36";
header.Add("User-Agent", userAgent);
WWW www = new WWW(url, null, header);
while (!www.isDone)
{
//Must yield below/wait for a frame
GameObject.Find("TextDebug").GetComponent<Text>().text = "Stat: " + www.progress;
yield return null;
}
byte[] yourBytes = www.bytes;
GameObject.Find("TextDebug").GetComponent<Text>().text = "Done downloading. Size: " + yourBytes.Length;
//Create Directory if it does not exist
if (!Directory.Exists(Path.GetDirectoryName(savePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(savePath));
GameObject.Find("TextDebug").GetComponent<Text>().text = "Created Dir";
}
try
{
//Now Save it
System.IO.File.WriteAllBytes(savePath, yourBytes);
Debug.Log("Saved Data to: " + savePath.Replace("/", "\\"));
GameObject.Find("TextDebug").GetComponent<Text>().text = "Saved Data";
}
catch (Exception e)
{
Debug.LogWarning("Failed To Save Data to: " + savePath.Replace("/", "\\"));
Debug.LogWarning("Error: " + e.Message);
GameObject.Find("TextDebug").GetComponent<Text>().text = "Error Saving Data";
}
//Install APK
installApp(savePath);
}
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;
}
}
对于 Android API 24 及更高版本，由于API发生了更改，因此需要使用不同的代码.以下C#代码基于此 Java答案.
For Android API 24 and above, this requires a different code since the API changed. The C# code below is based on the this Java answer.
//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;
}
如果出现异常:
您必须要做的几件事.
1 .从您的"AndroidSDK/extras/android/support/v4/android-support-v4.jar"中复制"android-support-v4.jar" 目录到您的"UnityProject/Assets/Plugins/Android" 目录.
1.Copy "android-support-v4.jar" from your "AndroidSDK/extras/android/support/v4/android-support-v4.jar" directory to your "UnityProject/Assets/Plugins/Android" directory.
2 .在 UnityProject/Assets/Plugins/Android 目录中创建一个名为"AndroidManifest.xml"的文件，并将下面的代码放入其中.
2.Create a file called "AndroidManifest.xml" in your UnityProject/Assets/Plugins/Android directory and put the code below into it.
请确保将"com.company.product" 替换为您自己的程序包名称.出现了 2 个实例.您必须同时替换它们:
Make sure to replace "com.company.product" with your own package name. There are 2 instances where this appeared. You must replace both of them:
可在 package ="com.company.product" 和 android:authorities ="com.company.product.fileprovider" 中找到.不要更改或删除文件提供程序" ，也不要更改其他任何内容.
These are found in package="com.company.product" and android:authorities="com.company.product.fileprovider". Don't change or remove the "fileprovider" and don't change anything else.
这是"AndroidManifest.xml"文件:
Here is the "AndroidManifest.xml" file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.company.product" xmlns:tools="http://schemas.android.com/tools" android:installLocation="preferExternal" android:versionName="1.0" android:versionCode="1">
<supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true" />
<application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="true">
<activity android:name="com.unity3d.player.UnityPlayerActivity" android:label="@string/app_name">
<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>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.company.product.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
</application>
<uses-sdk android:minSdkVersion="16" android:targetSdkVersion="23" />
</manifest>
3 .在"UnityProject/资产/插件/Android/res/xml"中创建一个名为" provider_paths.xml "的新文件 >目录，并将代码放在下面.如您所见，您必须先创建一个 res 文件夹，然后创建一个 xml 文件夹.
3.Create a new file called "provider_paths.xml" in your "UnityProject/Assets/Plugins/Android/res/xml" directory and put the code below in it. As you can see, you have to create a res and then an xml folder.
请确保将"com.company.product" 替换为您自己的程序包名称.它只会一次出现.
Make sure to replace "com.company.product" with your own package name.It only appeared once.
这是您应放入此" provider_paths.xml "文件中的内容:
Here is what you should put into this "provider_paths.xml" file:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<!--<external-path name="external_files" path="."/>-->
<external-path path="Android/data/com.company.product" name="files_root" />
<external-path path="." name="external_storage_root" />
</paths>
这篇关于如何从统一代码安装Android APK的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！