Unity保存图片到相册

Unity保存图片到Android相册

Java] 纯文本查看 复制代码

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package com.xuefei.game;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import com.unity3d.player.UnityPlayerNativeActivity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;
public class MainActivity extends UnityPlayerNativeActivity {
    public static Context context;
    public static MainActivity mainActivity;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mainActivity = this;
    }
    // 保存到相册
    public static void savePng(final String fileName) {
        context = mainActivity.getApplicationContext();
        mainActivity.runOnUiThread(new Runnable() {
            public void run() {
                Bitmap bitmap = BitmapFactory.decodeFile(Environment
                        .getExternalStorageDirectory()
                        + "/Android/data/com.xuefei.game/files/"
                        + fileName
                        + ".png");
                File file = new File(Environment.getExternalStorageDirectory()
                        + "/DCIM/Camera", fileName + ".jpg");
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(file);
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    Log.w("cat", e.toString());
                }
                bitmap.compress(CompressFormat.JPEG, 100, fos);
                try {
                    fos.flush();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    Log.w("cat", e.toString());
                }
                try {
                    fos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    Log.w("cat", e.toString());
                }
                bitmap.recycle();//扫描保存的图片
                context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" +Environment.getExternalStorageDirectory()
                        + "/DCIM/Camera/"+fileName + ".jpg")));

                Toast.makeText(context, "照片已保存到相册", Toast.LENGTH_SHORT).show();

            }
        });
    }
}

Unity中代码：

[C#] 纯文本查看 复制代码

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if (GUI.Button(new Rect(0, 720, 400, 120), "SavePng"))
        {
            StartCoroutine(SavePngToSD(DateTime.Now.ToFileTime().ToString()));
        }
/// <summary>
    /// 截图后先检测图片是否保存成功然后调用保存到相册
    /// </summary>
    /// <param name="name"></param>
    public void SavePng(string name)
    {
#if UNITY_ANDROID
        AndroidJavaClass jc = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject jo = jc.GetStatic<AndroidJavaObject>("currentActivity");
        jo.CallStatic("SavePng", name);
#elif  UNITY_IPHONE
#endif
    }
/// <summary>
    /// 保存截图到相册
    /// </summary>
    /// <param name="pngName"></param>
    /// <returns></returns>
    IEnumerator SavePngToSD(string pngName)
    {
        yield return new WaitForEndOfFrame();
        Application.CaptureScreenshot(pngName + ".png");
        while (!IsFileExistByPath(Application.persistentDataPath + "/" + pngName + ".png"))
        {
            yield return new WaitForSeconds(0.05f);
        }
        SavePng(pngName);
        yield return new WaitForSeconds(0.3f);
        //测试请求文件
        WWW www = new WWW("file:///" + Application.persistentDataPath + "/" + pngName + ".png");
        yield return www;
    }
    /// <summary>
    /// 检测文件是否存在
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>
    public static bool IsFileExistByPath(string path)
    {
        FileInfo info = new FileInfo(path);
        bool b = false;
        if (info == null || info.Exists == false)
        {
            b = false;
        }
        else
        {
            b = true;
        }
        return b;
    }

注意文件路径是否存在，不存在就创建


流程：Unity截屏--调用安卓拷贝到相册--扫描保存的文件

解决的问题：截屏图片在相册不显示。

Unity截屏插入iOS相册 

[C#] 纯文本查看 复制代码

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using System;
using System.IO;

#if UNITY_IOS
using System.Runtime.InteropServices;
#endif

using UnityEngine;

public class UnityPlugins : MonoBehaviour
{

    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

    }

    #if UNITY_IOS
    [DllImport("__Internal")]
    private static extern void _SavePhoto(string readAddr);
    #endif

    string path = "";

    private void OnGUI()
    {

        if (GUILayout.Button("TakePhoto", GUILayout.Height(300), GUILayout.Width(300)))
        {
            CaptureCamera();
            Debug.Log("TakePhoto");
        }
    }


    void CaptureCamera()
    {
        Camera camera = Camera.main;
        string name = DateTime.Now.ToFileTime().ToString();

        Rect rect = new Rect(0, 0, Screen.width, Screen.height);

        RenderTexture rt = new RenderTexture(Screen.width, Screen.height, 0);
        Texture2D frame = new Texture2D(Screen.width, Screen.height, TextureFormat.RGBA32, false);

        camera.targetTexture = rt;
        camera.Render();

        RenderTexture.active = rt;
        frame.ReadPixels(rect, 0, 0);
        frame.Apply();

        camera.targetTexture = null;
        RenderTexture.active = null;

        byte [] bytes = frame.EncodeToJPG();

        File.WriteAllBytes(Application.persistentDataPath + "/" + name + ".jpg",bytes);

        #if UNITY_IOS
        _SavePhoto(Application.persistentDataPath + "/" + name + ".jpg");
        #endif
    }

}

iOS代码

[AppleScript] 纯文本查看 复制代码

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#import <Foundation/Foundation.h>

@interface UnityPlugins : NSObject
- ( void ) imageSaved: ( UIImage *) image didFinishSavingWithError:( NSError *)error
    contextInfo: ( void *) contextInfo;
@end

 

[AppleScript] 纯文本查看 复制代码

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#import "UnityPlugins.h"
@implementation UnityPlugins
- ( void ) imageSaved: ( UIImage *) image didFinishSavingWithError:( NSError *)error
    contextInfo: ( void *) contextInfo
{
    NSLog(@"保存结束");
    if (error != nil) {
        NSLog(@"有错误");
    }
}
void _SavePhoto(char *readAddr)
{
    NSString *strReadAddr = [NSString stringWithUTF8String:readAddr];
    UIImage *img = [UIImage imageWithContentsOfFile:strReadAddr];
    NSLog([NSString stringWithFormat:@"w:%f, h:%f", img.size.width, img.size.height]);
    UnityPlugins *instance = [UnityPlugins alloc];
    UIImageWriteToSavedPhotosAlbum(img, instance,
        @selector(imageSaved:didFinishSavingWithError:contextInfo:), nil);
}
@end

目录结构
 


导出Xcode工程后或者  修改Info.plist  打开 Info.plist，点击 + 号，在 Key 中输入：Privacy - Photo Library Additions Usage Description，Type 选择 String，Value 中输入你的提示语（比如XXX访问相册）再次 Build