Uri转换为File地址

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Uri uri = data.getData();String[] proj = { MediaStore.Images.Media.DATA };Cursor actualimagecursor = managedQuery(uri,proj,null,null,null);int actual_image_column_index = actualimagecursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);actualimagecursor.moveToFirst();String img_path = actualimagecursor.getString(actual_image_column_index);File file = new File(img_path);