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  • C#

AndroidApplication.InvokeOnUnityMainThread

Declaration

public static void InvokeOnUnityMainThread(Unity.Android.Gradle.Manifest.Action action);

Description

Invokes delegate on Android application's main thread.

This is useful if you receive a Java callback on the UI thread, but want to process result on Unity's main thread.

Additional resources: Threads

using System.Threading;
using UnityEngine;
using UnityEngine.Android;

public class JavaThreads : MonoBehaviour { public class MyButtonListener : AndroidJavaProxy { public MyButtonListener() : base("android.view.View$OnClickListener") { }

public void onClick(AndroidJavaObject view) { Debug.Log($"onClick called on UI thread ${Thread.CurrentThread.ManagedThreadId}");

AndroidApplication.InvokeOnUnityMainThread(() => { Debug.Log($"Delegating to main thread ${Thread.CurrentThread.ManagedThreadId}"); });

view.Dispose(); } } public void Start() { AndroidApplication.InvokeOnUIThread(() => { // Button can only be added on UI thread using var button = new AndroidJavaObject("android.widget.Button", AndroidApplication.currentActivity); button.Call("setText", "Hello World"); using var layoutParams = new AndroidJavaObject("android.widget.LinearLayout$LayoutParams", 500, 100); button.Call("setLayoutParams", layoutParams); button.Call("setOnClickListener", new MyButtonListener());

AndroidApplication.unityPlayer .Call<AndroidJavaObject>("getFrameLayout") .Call("addView", button); }); } }

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