获取Uri的后缀名和名称

 public static String getEntryName(String picturePath) {if (!TextUtils.isEmpty(picturePath)) {int start = picturePath.lastIndexOf("/");//这样获取的就是名称，如果双引号里面是点的话获取的就是后缀名String format = "";if (start < 0) {format = picturePath;} else {format = picturePath.substring(start + 1);}return format;}return "";}                                        Log.i("MainActivity", getEntryName(uri.toString()));