GHZMRSpaceXR/Assets/Studio/MediaSoup/Scripts/Demo/AndroidVolume.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AndroidVolume : MonoBehaviour {

    const string AUDIO_SERVICE = "audio";
    const int STREAM_VOICE_CALL = 0;
    const int STREAM_SYSTEM = 1;
    const int STREAM_RING = 2;
    const int STREAM_MUSIC = 3;
    const int STREAM_ALARM = 4;
    const int STREAM_NOTIFICATION = 5;
    const int STREAM_DTMF = 8;
    public TextMesh text;
    int max = 0;
    int current = 0;

    private void Start()
    {
    }
    /// <summary>
    /// 获取Android系统音量值
    /// </summary>
    /// <returns></returns>
    public int GetMusicVolume()
    {
        AndroidJavaObject context = new AndroidJavaClass("com.unity3d.player.UnityPlayer").
        GetStatic<AndroidJavaObject>("currentActivity");
        using (AndroidJavaObject audioManager = context.Call<AndroidJavaObject>("getSystemService", AUDIO_SERVICE))
        {
            max = audioManager.Call<int>("getStreamMaxVolume", STREAM_MUSIC);
            current = audioManager.Call<int>("getStreamVolume", STREAM_MUSIC);
            Debug.Log("当前音量：" + current);
        }
        return current;
    }

    private void Update()
    {
    //   text.text = GetMusicVolume().ToString();
    }

    /// <summary>
    /// 设置Android系统音量值
    /// </summary>
    /// <param name="volume"></param>
    public void SetMusicVolume(int volume)
    {
        current -= volume;
        AndroidJavaObject context = new AndroidJavaClass("com.unity3d.player.UnityPlayer").
                GetStatic<AndroidJavaObject>("currentActivity");
        using (AndroidJavaObject audioManager = context.Call<AndroidJavaObject>("getSystemService", AUDIO_SERVICE))
        {
            audioManager.Call("setStreamVolume", STREAM_MUSIC, (int)current, 0);
        }
    }

    /// <summary>
    /// 设置Android系统音量值
    /// </summary>
    /// <param name="volume"></param>
    public void SetMusicVolumeAdd(int volume)
    {
        current += volume;
        AndroidJavaObject context = new AndroidJavaClass("com.unity3d.player.UnityPlayer").
                GetStatic<AndroidJavaObject>("currentActivity");
        using (AndroidJavaObject audioManager = context.Call<AndroidJavaObject>("getSystemService", AUDIO_SERVICE))
        {
            audioManager.Call("setStreamVolume", STREAM_MUSIC, (int)current, 0);
        }
    }
}