this script is a OnGUI script to support Android phone and VR Meta Quest 3, very useful!
using System.Collections;
using UnityEngine;
public class AndroidImagePicker : MonoBehaviour
{
[Header("Settings")]
public int maxImageSize = 1024;
public string albumName = "MyApp";
// GUI 相关变量
private string statusMessage = "点击按钮选择图片";
private Texture2D currentTexture;
private Vector2 scrollPosition = Vector2.zero;
// GUI 样式
private GUIStyle buttonStyle;
private GUIStyle labelStyle;
private GUIStyle boxStyle;
private bool stylesInitialized = false;
void Start()
{
// 初始化状态信息
statusMessage = "点击按钮选择图片";
}
void OnGUI()
{
// 初始化GUI样式
if (!stylesInitialized)
{
InitializeGUIStyles();
stylesInitialized = true;
}
// 开始滚动视图
scrollPosition = GUILayout.BeginScrollView(scrollPosition);
// 主容器
GUILayout.BeginVertical(boxStyle);
// 标题
GUILayout.Label("Android 图片选择器", labelStyle);
GUILayout.Space(10);
// 状态显示
GUILayout.BeginHorizontal();
GUILayout.Label("状态: ", GUILayout.Width(50));
GUILayout.Label(statusMessage);
GUILayout.EndHorizontal();
GUILayout.Space(10);
// 选择多张图片按钮
if (GUILayout.Button("选择图片", buttonStyle, GUILayout.Height(50)))
{
PickMultipleImages();
}
GUILayout.Space(10);
// 保存按钮（如果有当前图片的话）
if (currentTexture != null)
{
if (GUILayout.Button("保存图片到相册", buttonStyle, GUILayout.Height(35)))
{
SaveImageToGallery();
}
GUILayout.Space(10);
}
// 图片显示区域
if (currentTexture != null)
{
GUILayout.Label("选择的图片:", labelStyle);
GUILayout.Space(5);
// 计算显示尺寸，保持宽高比
float maxDisplayWidth = Screen.width - 40;
float maxDisplayHeight = Screen.height * 0.4f;
float aspectRatio = (float)currentTexture.width / currentTexture.height;
float displayWidth, displayHeight;
if (aspectRatio > 1) // 横图
{
displayWidth = Mathf.Min(maxDisplayWidth, currentTexture.width);
displayHeight = displayWidth / aspectRatio;
}
else // 竖图或正方形
{
displayHeight = Mathf.Min(maxDisplayHeight, currentTexture.height);
displayWidth = displayHeight * aspectRatio;
}
// 居中显示图片
GUILayout.BeginHorizontal();
GUILayout.FlexibleSpace();
GUILayout.Label(currentTexture, GUILayout.Width(displayWidth), GUILayout.Height(displayHeight));
GUILayout.FlexibleSpace();
GUILayout.EndHorizontal();
GUILayout.Space(10);
// 图片信息
GUILayout.Label($"图片尺寸: {currentTexture.width} x {currentTexture.height}", labelStyle);
}
GUILayout.Space(20);
// 设置区域
GUILayout.Label("设置:", labelStyle);
GUILayout.BeginHorizontal();
GUILayout.Label("最大图片尺寸:", GUILayout.Width(100));
string maxSizeStr = GUILayout.TextField(maxImageSize.ToString(), GUILayout.Width(100));
if (int.TryParse(maxSizeStr, out int newMaxSize))
{
maxImageSize = newMaxSize;
}
GUILayout.EndHorizontal();
GUILayout.BeginHorizontal();
GUILayout.Label("相册名称:", GUILayout.Width(100));
albumName = GUILayout.TextField(albumName, GUILayout.Width(150));
GUILayout.EndHorizontal();
GUILayout.EndVertical();
// 结束滚动视图
GUILayout.EndScrollView();
}
/// <summary>
/// 初始化GUI样式
/// </summary>
private void InitializeGUIStyles()
{
// 按钮样式
buttonStyle = new GUIStyle(GUI.skin.button);
buttonStyle.fontSize = 16;
buttonStyle.fontStyle = FontStyle.Bold;
// 标签样式
labelStyle = new GUIStyle(GUI.skin.label);
labelStyle.fontSize = 14;
labelStyle.fontStyle = FontStyle.Bold;
// 框体样式
boxStyle = new GUIStyle(GUI.skin.box);
boxStyle.padding = new RectOffset(10, 10, 10, 10);
}
/// <summary>
/// 选择多张图片（Android 18+，iOS 14+支持）
/// </summary>
public void PickMultipleImages()
{
// 检查是否已经在选择媒体文件
if (NativeGallery.IsMediaPickerBusy())
{
UpdateStatus("正在选择图片，请稍候...");
return;
}
// 检查设备是否支持多选
if (!NativeGallery.CanSelectMultipleFilesFromGallery())
{
UpdateStatus("当前设备不支持选择多张图片");
return;
}
// 检查权限
CheckPermissionAndPickImages();
}
/// <summary>
/// 检查权限并选择图片
/// </summary>
private void CheckPermissionAndPickImages()
{
bool hasPermission = NativeGallery.CheckPermission(NativeGallery.PermissionType.Read, NativeGallery.MediaType.Image);
if (hasPermission)
{
// 有权限，直接选择图片
PickImages();
}
else
{
// 需要请求权限
UpdateStatus("请求权限中...");
NativeGallery.RequestPermissionAsync(OnPermissionResult, NativeGallery.PermissionType.Read, NativeGallery.MediaType.Image);
}
}
/// <summary>
/// 权限请求结果回调
/// </summary>
/// <param name="permission">权限结果</param>
private void OnPermissionResult(NativeGallery.Permission permission)
{
if (permission == NativeGallery.Permission.Granted)
{
UpdateStatus("权限获取成功！");
PickImages();
}
else
{
UpdateStatus("权限被拒绝，无法访问相册");
if (permission == NativeGallery.Permission.Denied)
{
// 权限被永久拒绝，提示用户去设置中开启
UpdateStatus("权限被永久拒绝，请在设置中手动开启相册权限");
}
}
}
/// <summary>
/// 执行选择图片操作
/// </summary>
private void PickImages()
{
UpdateStatus("正在打开相册选择多张图片...");
NativeGallery.GetImagesFromGallery((paths) =>
{
if (paths != null && paths.Length > 0)
{
UpdateStatus($"选择了 {paths.Length} 张图片");
// 输出选择的多张图片
for (int i = 0; i < paths.Length; i++)
{
Debug.Log($"图片 {i + 1}: {paths[i]}");
}
// 显示第一张图片
if (paths.Length > 0)
{
LoadAndDisplayImage(paths[0]);
}
}
else
{
UpdateStatus("已取消选择图片");
}
}, "选择图片", "image/*");
}
/// <summary>
/// 加载并显示选择的图片
/// </summary>
/// <param name="imagePath">图片路径</param>
private void LoadAndDisplayImage(string imagePath)
{
// 释放之前的纹理以避免内存泄漏
if (currentTexture != null)
{
Destroy(currentTexture);
currentTexture = null;
}
// 从路径加载图片
currentTexture = NativeGallery.LoadImageAtPath(imagePath, maxImageSize, false, true, false);
if (currentTexture != null)
{
UpdateStatus($"图片加载成功！尺寸: {currentTexture.width}x{currentTexture.height}");
// 可选：获取图片属性
GetImageProperties(imagePath);
}
else
{
UpdateStatus("图片加载失败");
Debug.LogError("无法从路径加载纹理: " + imagePath);
}
}
/// <summary>
/// 保存当前图片到相册（可选功能）
/// </summary>
public void SaveImageToGallery()
{
if (currentTexture == null)
{
UpdateStatus("没有图片可保存");
return;
}
UpdateStatus("正在保存图片到相册...");
NativeGallery.SaveImageToGallery(currentTexture, albumName, "SavedImage.png", (success, path) =>
{
if (success)
{
UpdateStatus("图片保存成功！路径: " + path);
Debug.Log("图片保存成功: " + path);
}
else
{
UpdateStatus("图片保存失败");
Debug.LogError("图片保存失败");
}
});
}
/// <summary>
/// 更新状态文本
/// </summary>
/// <param name="message">状态信息</param>
private void UpdateStatus(string message)
{
statusMessage = message;
Debug.Log("状态: " + message);
}
/// <summary>
/// 获取图片属性信息（可选功能）
/// </summary>
/// <param name="imagePath">图片路径</param>
private void GetImageProperties(string imagePath)
{
NativeGallery.ImageProperties properties = NativeGallery.GetImageProperties(imagePath);
if (properties.width > 0 && properties.height > 0)
{
Debug.Log($"图片属性 - 宽度: {properties.width}, 高度: {properties.height}, MIME类型: {properties.mimeType}, 方向: {properties.orientation}");
}
else
{
Debug.Log("无法获取图片属性");
}
}
/// <summary>
/// 清理资源
/// </summary>
void OnDestroy()
{
if (currentTexture != null)
{
Destroy(currentTexture);
}
}
}
this script is a OnGUI script to support Android phone and VR Meta Quest 3, very useful!