/*用来标识请求照相功能的activity*/
private static final int CAMERA_WITH_DATA = 3023;
/*用来标识请求gallery的activity*/
private static final int PHOTO_PICKED_WITH_DATA = 3021;
/*拍照的照片存储位置*/
private static final File PHOTO_DIR = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera");
private File mCurrentPhotoFile;//照相机拍照得到的图片
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