direction | 易学教程

Getting location of a direction of current location in Android

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问题 I want to implement a function that calculates locations' list (longitudes and latitudes) through a direction of my phone. The result can be a rectengular shape which is pointing the corners as locations. First how can i find the device current direction which means which direction the back camera points ? Then how can i obtain a list of location information through this direction ? Thank you 回答1: From the documentation of Google Maps Android API, the location data available to an Android

What is the most effective way to test for combined keyboard arrow direction in ActionScript 3.0?

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问题 I need to monitor the direction a user is indicating using the four directional arrow keys on a keyboard in ActionScript 3.0 and I want to know the most efficient and effective way to do this. I've got several ideas of how to do it, and I'm not sure which would be best. I've found that when tracking Keyboard.KEY_DOWN events, the event repeats as long as the key is down, so the event function is repeated as well. This broke the method I had originally chosen to use, and the methods I've been

How to determine packet direction using libpcap?

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问题 I am working on project using libpcap. Now, I need to know the direction of packet (inbound or outbound) once I got the packet in callback function. I am going to write the methods to compare IP and MAC address between client and these information extract from packet. Am I right? Could you please help me some comments or advices on this problem? Thank you for your time. 回答1: The source or target IP address is sufficient. If the source is local, it's outbound. If the target is local, it's

how to get total distance and duration between two location along with waypoint in google map

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问题 i want to get total duration and distance between two location along with waypoints. the methodwhich i'm using is giving me distance and duration but without waypoints. so can any one help me? my method look like below... public String getDistance(final double lat1, final double lon1, final double lat2, final double lon2){ Thread thread=new Thread(new Runnable() { @Override public void run() { try { URL url = new URL("https://maps.googleapis.com/maps/api/directions/json?origin=" + lat1 + ","

Android OnTouch swipe up/down direction change

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问题 I'm trying to detect when an swipe direction was changed while the user still swipes on the screen. I have something like this (very basic) for detecting the swipe direction: @Override public boolean onTouch(View view, MotionEvent motionEvent) { int action = motionEvent.getActionMasked(); switch (action) { case MotionEvent.ACTION_DOWN: { Log.d(TAG, "onTouch: DOWN _Y = " + motionEvent.getRawY()); mLastTouchY = mPrevTouchY = motionEvent.getRawY(); break; } case MotionEvent.ACTION_MOVE: { Log.d

BX Slider and scrolling the page

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问题 I am using bxslider for a mobile site, horizontally scrolling images. The problem is that page is not scrolling if you touch bxslider. How can I catch the finger direction and scroll the page down ? thanks. 回答1: You can set the option touchEnabled to false. 来源： https://stackoverflow.com/questions/13845799/bx-slider-and-scrolling-the-page

hiding the last direction marker with Google maps api

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问题 I've calculated a route with the same begin and end point with the maps api. Because the begin and end point are the same, the first marker is overlapped by the last marker. Now I want only the last marker removed. I only know how to hide them all with: directionsDisplay.suppressMarkers = true; Is there a way to loop through the markers and remove the last one? this is the code I use for the directions: function calcRoute(waypts) { var start = waypts[0].location; var end = waypts[0].location;

jquery .show('slow') direction?

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问题 Is it possible to change direction of $("selector").show('slow') and hide('slow') effects in jQuery? I can define directions for other effects such as slide and clip, but there's no option for show or hide('slow') 回答1: show() is just an arbitrary function to display an element on a page. Without the argument it wouldn't even have an animation. If you want access to more elaborate animations and control the direction it fades in on you will need to use .animate() Or use an extra library that

Needs use right “text-overflow” when “direction” is set to “rtl”

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问题 I need to put "..." in the front of text and show only last part of it, when it fills div. And do nothing when it is normal C:\fakepath\996571_1398802860346752_2094565473_n.jpg C:\fakepath\1.jpg Here is what i have : http://jsfiddle.net/CBUH4/5/ Here is what i need : Is it possible to do by Css, without using JavaScript or jQuery. 回答1: Maybe something like

爬取链家网上海二手房数据，并进行分析建模

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一.分析网页结构并编写程序 import requests import csv import time import math import random from lxml import etree from multiprocessing . dummy import Pool def getPage ( url ) : time . sleep ( random . choice ( [ 2 , 2.5 , 3 , 3.5 ] ) ) page = requests . get ( url , headers = { "User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.110" } ) return etree . HTML ( page . text ) def csvWrite ( item ) : with open ( "lianjia_sh_ershoufang_data.csv" , "a" , encoding = "utf-8" , newline = "" ) as f : csv . writer ( f ) .