[Activity(Theme = "@style/MyStyleBottom")]    public class SelectPicPopupWindow : Activity, IOnClickListener    {        private const int Display_RequestCode = 0xa1;        private const int Camera_RequestCode = 0xa2;        private const int PhotoGallery_RequestCode = 0xa3;        private Java.IO.File finalFile;        private Java.IO.File originalFile;        protected override void OnCreate(Bundle savedInstanceState)        {            //竖屏显示            RequestedOrientation = Android.Content.PM.ScreenOrientation.Portrait;            base.OnCreate(savedInstanceState);            SetContentView(Resource.Layout.SelectPicPopupWindow);            originalFile = new Java.IO.File(Android.OS.Environment.GetExternalStoragePublicDirectory(                Android.OS.Environment.DirectoryPictures                ), "zcb_pic_" + SystemClock.CurrentThreadTimeMillis() + ".png");            finalFile = new Java.IO.File(Android.OS.Environment.GetExternalStoragePublicDirectory(                Android.OS.Environment.DirectoryPictures                ), "zcb_pic_" + SystemClock.CurrentThreadTimeMillis() + ".png");            var btn_take_photo = this.FindViewById(Resource.Id.btn_take_photo);            var btn_pick_photo = this.FindViewById(Resource.Id.btn_pick_photo);            var btn_cancel = this.FindViewById(Resource.Id.btn_cancel);            btn_take_photo.SetOnClickListener(this);            btn_pick_photo.SetOnClickListener(this);            btn_cancel.SetOnClickListener(this);            var windowManager = WindowManager;            var windowManagerLayoutParams = Window.Attributes;            var displayMetrics = new Android.Util.DisplayMetrics();            windowManager.DefaultDisplay.GetMetrics(displayMetrics);            windowManagerLayoutParams.Width = (int)(displayMetrics.WidthPixels * 1); // 宽度设置            Window.Attributes = windowManagerLayoutParams;        }                public void OnClick(View v)        {            switch (v.Id)            {                case Resource.Id.btn_take_photo:                    try                    {                        // 摄像头拍摄                        CutImageByCamera();                    }                    catch (Exception ex)                    {                        Toast.MakeText(this, "App Camera Error:" + ex.InnerException, ToastLength.Short).Show();                    }                    break;                case Resource.Id.btn_pick_photo:                    try                    {                        // 相册选择                        CutImageByImgStore();                    }                    catch (Exception ex)                    {                        Toast.MakeText(this, "App Select Photo Gallery Error:" + ex.InnerException, ToastLength.Short).Show();                    }                    break;                case Resource.Id.btn_cancel:                default: Finish(); break;            }        }        public override bool OnTouchEvent(MotionEvent e)        {            Finish();            return base.OnTouchEvent(e);        }        protected override void OnActivityResult(int requestCode, [GeneratedEnum] Result ResultStatus, Intent data)        {            if (ResultStatus == Result.Ok)            {                if (requestCode == Display_RequestCode)// 显示结果                {                    Intent intent = new Intent();                    intent.SetData(Android.Net.Uri.FromFile(finalFile));                    SetResult(Result.Ok, intent);                    Finish();                }                if (requestCode == Camera_RequestCode) //摄像头 剪裁                  {                    CropRawPhoto(Android.Net.Uri.FromFile(originalFile));                }                if (requestCode == PhotoGallery_RequestCode)// 选择图片 剪裁                {                    /*                    * 若系统版本低于4.4，返回原uri                    * 若高于4.4，解析uri后返回                    * */                    if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat)                    {                        var url= Android.Net.Uri.Parse("file://" + GetPath(BaseContext, data.Data));                        data.SetData(url);                    }                    CropRawPhoto(data.Data);                }            }        }        /// 
        /// 调用摄像头拍摄        /// 
        private void CutImageByCamera()        {            Intent getImageByCamera = new Intent("android.media.action.IMAGE_CAPTURE");            getImageByCamera.PutExtra(MediaStore.ExtraOutput, Android.Net.Uri.FromFile(originalFile));            getImageByCamera.PutExtra(MediaStore.ExtraVideoQuality, 1);            StartActivityForResult(getImageByCamera, Camera_RequestCode);        }        /// 
        /// 调用相册选择        /// 
        private void CutImageByImgStore()        {            Intent _intentCut =new Intent(Intent.ActionGetContent, null);            _intentCut.SetType("image/*");// 设置文件类型            _intentCut.PutExtra(MediaStore.ExtraOutput, Android.Net.Uri.FromFile(originalFile));            _intentCut.PutExtra(MediaStore.ExtraVideoQuality, 1);                        StartActivityForResult(_intentCut, PhotoGallery_RequestCode);        }        /// 
        /// 剪裁图片        /// 
        ///         public void CropRawPhoto(Android.Net.Uri uri)        {            if (!HasSdcard)            {                Toast.MakeText(this, "无法存储截取后的图片", ToastLength.Short).Show();                return;            }            Intent _intentCut = new Intent("com.android.camera.action.CROP");            _intentCut.SetDataAndType(uri, "image/*");            _intentCut.PutExtra("crop", "true");            // aspectX , aspectY :宽高的比例            _intentCut.PutExtra("aspectX", 1);            _intentCut.PutExtra("aspectY", 1);            // outputX , outputY : 裁剪图片宽高            _intentCut.PutExtra("outputX", "500");            _intentCut.PutExtra("outputY", "500");            _intentCut.PutExtra(MediaStore.ExtraVideoQuality, 1);            _intentCut.PutExtra(MediaStore.ExtraOutput, Android.Net.Uri.FromFile(finalFile));            StartActivityForResult(_intentCut, Display_RequestCode);        }        /// 
        /// 检查设备是否存在SDCard的工具方法        /// 
        /// 
              public static bool HasSdcard        {            get            {                String state = Android.OS.Environment.ExternalStorageState;                if (state.Equals(Android.OS.Environment.MediaMounted))                    return true;                else                    return false;            }        }        #region 高于 v4.4 版本 解析真实路径        public static String GetPath(Context context,Android.Net.Uri uri)        {            bool isKitKat = Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat;            // DocumentProvider              if (isKitKat && DocumentsContract.IsDocumentUri(context, uri))            {                // ExternalStorageProvider                  if (isExternalStorageDocument(uri))                {                    String docId = DocumentsContract.GetDocumentId(uri);                    String[] split = docId.Split(':');                    String type = split[0];                    if ("primary".Equals(type.ToLower()))                    {                        return Android.OS.Environment.ExternalStorageDirectory + "/" + split[1];                    }                    // TODO handle non-primary volumes                  }                // DownloadsProvider                  else if (isDownloadsDocument(uri))                {                    String id = DocumentsContract.GetDocumentId(uri);                    Android.Net.Uri contentUri = ContentUris.WithAppendedId(                            Android.Net.Uri.Parse("content://downloads/public_downloads"),long.Parse(id));                    return getDataColumn(context, contentUri, null, null);                }                // MediaProvider                  else if (isMediaDocument(uri))                {                    String docId = DocumentsContract.GetDocumentId(uri);                    String[] split = docId.Split(':');                    String type = split[0];                    Android.Net.Uri contentUri = null;                    if ("image".Equals(type))                    {                        contentUri = MediaStore.Images.Media.ExternalContentUri;                    }                    else if ("video".Equals(type))                    {                        contentUri = MediaStore.Video.Media.ExternalContentUri;                    }                    else if ("audio".Equals(type))                    {                        contentUri = MediaStore.Audio.Media.ExternalContentUri;                    }                    String selection = "_id=?";                    String[] selectionArgs = new String[] {                    split[1]            };                    return getDataColumn(context, contentUri, selection, selectionArgs);                }            }            // MediaStore (and general)              else if ("content".Equals(uri.Scheme.ToLower()))            {                // Return the remote address                  if (isGooglePhotosUri(uri))                    return uri.LastPathSegment;                return getDataColumn(context, uri, null, null);            }            // File              else if ("file".Equals(uri.Scheme.ToLower()))            {                return uri.Path;            }            return null;        }        /**          * Get the value of the data column for this Uri. This is useful for          * MediaStore Uris, and other file-based ContentProviders.          *          * @param context The context.          * @param uri The Uri to query.          * @param selection (Optional) Filter used in the query.          * @param selectionArgs (Optional) Selection arguments used in the query.          * @return The value of the _data column, which is typically a file path.          */        public static String getDataColumn(Context context,Android.Net.Uri uri, String selection,                String[] selectionArgs)        {            ICursor cursor = null;            String column = "_data";            String[] projection = {                column            };            try            {                cursor = context.ContentResolver.Query(uri, projection, selection, selectionArgs,                        null);                if (cursor != null && cursor.MoveToFirst())                {                    int index = cursor.GetColumnIndexOrThrow(column);                    return cursor.GetString(index);                }            }            finally            {                if (cursor != null)                    cursor.Close();            }            return null;        }        /**          * @param uri The Uri to check.          * @return Whether the Uri authority is ExternalStorageProvider.          */        public static bool isExternalStorageDocument(Android.Net.Uri uri)        {            return "com.android.externalstorage.documents".Equals(uri.Authority);        }        /**          * @param uri The Uri to check.          * @return Whether the Uri authority is DownloadsProvider.          */        public static bool isDownloadsDocument(Android.Net.Uri uri)        {            return "com.android.providers.downloads.documents".Equals(uri.Authority);        }        /**          * @param uri The Uri to check.          * @return Whether the Uri authority is MediaProvider.          */        public static bool isMediaDocument(Android.Net.Uri uri)        {            return "com.android.providers.media.documents".Equals(uri.Authority);        }        /**          * @param uri The Uri to check.          * @return Whether the Uri authority is Google Photos.          */        public static bool isGooglePhotosUri(Android.Net.Uri uri)        {            return "com.google.android.apps.photos.content".Equals(uri.Authority);        }        #endregion    }