unity3d 保存（截图、拍照）图片到Android(安卓)IPhone手机相册

亲测可行：

http://www.taidous.com/bbs/forum.php?mod=viewthread&tid=24476

总结：

第一步：新建Android工程，导入unity class.jar包（Unity下找classes.jar, 具体路径为：Unity\Editor\Data\PlaybackEngines\androidplayer\release\bin\classes.jar），写一个保存函数：

package com.zz.cutimage;import java.io.File;import java.io.FileNotFoundException;import java.lang.reflect.Field; import android.app.Activity;import android.content.Context;import android.content.Intent;import android.net.Uri;import android.provider.MediaStore;import android.util.Log;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import com.unity3d.player.UnityPlayerActivity;public class MainActivity extends UnityPlayerActivity {         //        Button btn ;//        @Override//        protected void onCreate(Bundle savedInstanceState) {//                super.onCreate(savedInstanceState);//                setContentView(R.layout.main);//                btn = (Button)findViewById(R.id.btn);//                btn.setOnClickListener(new OnClickListener() {//                        //                        @Override//                        public void onClick(View arg0) {//                                //                                saveImageToGallery(MainActivity.this, "Environment.getExternalStorageDirectory().getPath() + File.separator + taidous/a.jpg");//                        }//                });//        }                 public static void SaveImageToGallery(String path)         {            try{                Class<?> m_ClassUnityPlayer = Class.forName("com.unity3d.player.UnityPlayer");                Field m_CurrentActivityFieldUnityPlayer = m_ClassUnityPlayer.getField("currentActivity");                Activity currentActivity = (Activity) m_CurrentActivityFieldUnityPlayer.get(m_ClassUnityPlayer);                Context context = currentActivity;                File file = new File(path);                Log.i("SaveImageToGallery", file.getPath() + "--" + file.length());                String url = "";                // 其次把文件插入到系统图库                try {                        url = MediaStore.Images.Media.insertImage(context.getContentResolver(),                                            file.getAbsolutePath(), file.getName(), null);                } catch (FileNotFoundException e) {                    e.printStackTrace();                }                Log.i("SaveImageToGallery", file.getPath() + "--" + file.length());                // 最后通知图库更新                context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + file.getPath())));            }catch(Exception e)            {                     Log.e("SaveImageToGallery", e.getMessage());            }        }}

第二部：导出jar包到unity，unity在Androidadminfest中包含包：

第三部：unity脚本中调用：

public void OnClickSavePhoto(){var bytes = photoTex2d.EncodeToPNG();string path = Application.persistentDataPath + "/" + System.DateTime.Now.ToLongTimeString() + ".png";#if UNITY_EDITORFile.WriteAllBytes(Application.dataPath + "/SavedScreen.png", bytes);#elif UNITY_ANDROID || UNITY_IPHONEFile.WriteAllBytes(path, bytes);#endifsharePhotoPanel.SetActive(false);#if UNITY_ANDROIDtry{AndroidJavaClass testActivityClass = new AndroidJavaClass("com.zz.cutimage.MainActivity");Debug.LogWarning("screenShot in android");if (testActivityClass != null){Debug.LogWarning("testActivityClass note null");object[] objs = new object[] { path };testActivityClass.CallStatic("SaveImageToGallery", objs);}}catch (System.Exception e){Debug.LogError(e);}#endif}

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