Use custom Manifest file and permission in Unity?

Question

Im currently trying to program a little game for android with Unity3D. Because I want a visible status bar, I modified the AndroidManifest in the Project Folder (C:\Users\Public\Documents\Unity Projects\ProjectName\Temp\StagingArea) like this :

<application android:theme="Theme.Light.NoTitleBar" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner">

But everytime i generate the APK, unity changes the Android Manifest to this :

<application android:theme="@style/UnityThemeSelector" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner">

Unity3D does change my modified Manifests everytime?

Answer 1

You are modifying the wrong AndroidManifest file. That AndroidManifest from <ProjectName>\Temp\StagingArea you are modifying is generated by unity each time you build your project.

To use a custom AndroidManifest file, you have to put your custom AndroidManifest file at <ProjectName>Assets\Plugins\Android.

1.Go to <UnityInstallationDirecory>\Editor\Data\PlaybackEngines\AndroidPlayer\Apk, Copy the AndroidManifest.xml file to your <ProjectName>Assets\Plugins\Android

2.Open the copied Manifest file from <ProjectName>Assets\Plugins\Android and add your manifest.

In your particular case, add <application android:theme="Theme.Light.NoTitleBar" android:icon="@drawable/app_icon" android:label="@string/app_name" android:debuggable="false" android:isGame="true" android:banner="@drawable/app_banner"> to it. Save, Build and Run.

Unity will now use that AndroidManifest file. If you get crash or any other problem, then Unity does not want you to change that.

Answer 2

Starting with Unity 2018 you should implement the IPostGenerateGradleAndroidProject interface which will allow you to edit the android manifest after Unity produces it. In the code below I have added methods to set the microphone permission, set hardware acceleration, and set your application theme ( replace SetMicrophonePermission() to your preferred method, which is called when Unity calls OnPostGenerateGradleAndroidProject()).

Add the following code to Assets/Editor/ModifyUnityAndroidAppManifestSample.cs

using System.IO;
using System.Text;
using System.Xml;
using UnityEditor.Android;

public class ModifyUnityAndroidAppManifestSample : IPostGenerateGradleAndroidProject
{

    public void OnPostGenerateGradleAndroidProject(string basePath)
    {
        // If needed, add condition checks on whether you need to run the modification routine.
        // For example, specific configuration/app options enabled

        var androidManifest = new AndroidManifest(GetManifestPath(basePath));

        androidManifest.SetMicrophonePermission();

        // Add your XML manipulation routines

        androidManifest.Save();
    }

    public int callbackOrder { get { return 1; } }

    private string _manifestFilePath;

    private string GetManifestPath(string basePath)
    {
        if (string.IsNullOrEmpty(_manifestFilePath))
        {
            var pathBuilder = new StringBuilder(basePath);
            pathBuilder.Append(Path.DirectorySeparatorChar).Append("src");
            pathBuilder.Append(Path.DirectorySeparatorChar).Append("main");
            pathBuilder.Append(Path.DirectorySeparatorChar).Append("AndroidManifest.xml");
            _manifestFilePath = pathBuilder.ToString();
        }
        return _manifestFilePath;
    }
}


internal class AndroidXmlDocument : XmlDocument
{
    private string m_Path;
    protected XmlNamespaceManager nsMgr;
    public readonly string AndroidXmlNamespace = "http://schemas.android.com/apk/res/android";
    public AndroidXmlDocument(string path)
    {
        m_Path = path;
        using (var reader = new XmlTextReader(m_Path))
        {
            reader.Read();
            Load(reader);
        }
        nsMgr = new XmlNamespaceManager(NameTable);
        nsMgr.AddNamespace("android", AndroidXmlNamespace);
    }

    public string Save()
    {
        return SaveAs(m_Path);
    }

    public string SaveAs(string path)
    {
        using (var writer = new XmlTextWriter(path, new UTF8Encoding(false)))
        {
            writer.Formatting = Formatting.Indented;
            Save(writer);
        }
        return path;
    }
}


internal class AndroidManifest : AndroidXmlDocument
{
    private readonly XmlElement ApplicationElement;

    public AndroidManifest(string path) : base(path)
    {
        ApplicationElement = SelectSingleNode("/manifest/application") as XmlElement;
    }

    private XmlAttribute CreateAndroidAttribute(string key, string value)
    {
        XmlAttribute attr = CreateAttribute("android", key, AndroidXmlNamespace);
        attr.Value = value;
        return attr;
    }

    internal XmlNode GetActivityWithLaunchIntent()
    {
        return SelectSingleNode("/manifest/application/activity[intent-filter/action/@android:name='android.intent.action.MAIN' and " +
                "intent-filter/category/@android:name='android.intent.category.LAUNCHER']", nsMgr);
    }

    internal void SetApplicationTheme(string appTheme)
    {
        ApplicationElement.Attributes.Append(CreateAndroidAttribute("theme", appTheme));
    }

    internal void SetStartingActivityName(string activityName)
    {
        GetActivityWithLaunchIntent().Attributes.Append(CreateAndroidAttribute("name", activityName));
    }


    internal void SetHardwareAcceleration()
    {
        GetActivityWithLaunchIntent().Attributes.Append(CreateAndroidAttribute("hardwareAccelerated", "true"));
    }

    internal void SetMicrophonePermission()
    {
        var manifest = SelectSingleNode("/manifest");
        XmlElement child = CreateElement("uses-permission");
        manifest.AppendChild(child);
        XmlAttribute newAttribute = CreateAndroidAttribute("name", "android.permission.RECORD_AUDIO");
        child.Attributes.Append(newAttribute);
    }
}