Tomson Xu

有时你希望在你的app里对一些创建好的object进行共享，例如httpClient object, login flag variable。你当然可以用static or Singleton pattern来实现共享，但最好的方法就是创建一个custom Application class，然后把你要共享的object放在这个class里。这个class instance存在于你的a

android map app by using google map javascript api(solution: communication between html javascript and android app native code)http://code.google.com/intl/zh-TW/apis/maps/articles/android_v3.h

http://www.cnblogs.com/Gaojiecai/archive/2011/12/10/2283156.html

Android UI操作并不是线程安全的, UI操作必须在UI线程中执行，也就是说你不能在自己另起的一个thread里进行UI操作。举个例子，下列代码是希望在自定义的thread中修改Activity里的button name。ThreadHandlerDemoActivity.javapublic class ThreadHandlerDemoActivity extends Act

Java UDP Socket使用2个class: DatagramSocket and DatagramPacket在DatagramSocket中並不區分ServerSocket和ClientSocket，调用send方法的就相当于socket client，调用receive方法的就相当于socket server。调用DatagramSocket 的receive方法时

httpclient与webview需要进行cookie 共享，因为如果不共享，那么假设你在httpclient进行了登录，然后用webview里打开那些login之后才能看的page，就会叫你再loginDefaultHttpClient httpclient=....;String toUrl="https://cap.cityu.edu.hk/studentlan/deta

I choose "htmlcleaner" parser because its size is smallanother alternative option is "jsoup"

google map direction api只开放3种travel mode (driving, walk, bicycle)，并没有开放travel mode "大眾運輸"。因此无法获取大众运输的route。ref links:http://maps.google.com.hk/intl/zh-TW/landing/transit/text.html#ymdhttp://

基本原理是： send http request to google direction api url (http://maps.google.com/maps/api/directions/json?xxx) parse the response, and then draw it.google direction api user guide: http://code.goo

http://blog.youkuaiyun.com/Android_Tutor/article/details/5772285

从eclipse你的project的bin folder下复制apk file到web site，然后提供一条link给user下载。注意：如果user在device browser点该link显示"404 page not found"，表示web server不认识apk mime type，你需要在你的web server添加一个mime type for apk with fo

GCM是第二代的google message service, 第一代是c2dm。 目前c2dm已经相当于不能用了，因为它不在允许新的android注册和使用c2dm。如何创建一个最简单的app和相关的server side. （ref link)1. 首先要有一个google account，and then access Google APIs Console page

http://support.google.com/googleplay/android-developer/bin/answer.py?hl=en&answer=1078870

* for tablet version, should support both portrait and landscape. * for phone version, consider support landscape。如果支持打横，考虑在弹出keyboard时，要调整text field的位置使其不要被遮挡。假设你的navigation bar的height很高，而text fiel

http://www.slideshare.net/mwillbanks/mobile-push-notifications

open a terminal and navigate to the tools/ directory in the Android SDK, then to open sdk manager, execute "./android" instead of "android"to open avd manager, execute "./android avd"

http://chicagoandroid.com/profiles/blogs/android-screen-capture-in

http://android.blog.51cto.com/268543/323982http://hatsukiakio.blogspot.com/2009/06/startactivitystartactivityforresult.htmlhttp://www.moke.tw/wordpress/computer/advanced/231

最好的solution:https://github.com/jgilfelt/android-mapviewballoons其他的solutions:http://www.anddev.org/map-tutorials-f18/nice-bubble-in-android-maps-t52751.htmlhttps://github.com/commonsguy/cw-ad

当使用webview访问ssl加密的url时，页面显示是空白的，而使用系统自带的浏览器打开时，会弹出确认证书的对话框。忽略这步的方法是： WebView myWebView = (WebView) findViewById(R.id.webview); myWebView.loadUrl("https://cap.cityu.edu.hk/studentlan/");

solution:open "project.properties" file and update "target" version, the sdk version must be already installed to your machine.

在网上查了下，多数使用下列代码： private String getLocalIpAddress() { try { for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) { NetworkInterface intf

有2个方案，一是自己写thead + handler 来实现， 另一种是使用AsyncTask。我选择后者参考文档：http://blog.youkuaiyun.com/mylzc/article/details/6736988http://blog.youkuaiyun.com/mylzc/article/details/6772129下面连接提供了自己写thread + handl

http://yangguangfu.iteye.com/blog/1063732http://blog.youkuaiyun.com/luoshengyang/article/details/6737352

android p2p wifi package (use wifi direct)http://developer.android.com/reference/android/net/wifi/p2p/package-summary.htmlwifi direct demohttp://developer.android.com/resources/samples/WiFiDirec

如何申請Google Map API Key (模擬器用)参考文档: http://wangshifuola.blogspot.com/2010/12/androidgoogle-map-api-key.htmlstep 1: 找到android key store file的path: in eclipse, access "Windows > Preferences > A

修改android project里的AndroidManifest.xml的 tag的"android:name" property

solution 1: use google map javascript api + webview compenent优点：1. 所有对地图的操作都写在html page的javascript代码里，android side的app只是使用webview控件来当成一个web browser来显示。由于android app的java代码可以调用webview里的html page里的j

http://blog.youkuaiyun.com/kesenhoo/article/details/6566388

1. install eclipse2. install ADT plugin http://developer.android.com/sdk/eclipse-adt.html#installing3. Update/install android sdk "eclipse > window > android sdk manager", install android version

notification有3种方案：轮询 （poll）长连接 (socket or http: comet)push notification (c2dm for android, apple notification server foriPhone, 2者的原理是一样的：push server -> apn -> iPhone -> app installed iniP

http://www.vogella.de/articles/AndroidListView/article.htmlhttp://chning2010.iteye.com/blog/605588http://w2davids.wordpress.com/android-listview-with-iconsimages-and-sharks-with-lasers/http:

http://android.blog.51cto.com/268543/333769

http://www.cnblogs.com/hdjjun/archive/2010/06/02/1749864.htmlhttp://ozzysun.blogspot.com/2010/10/android-intent-filter-intent.html

ref links:api document: http://developer.android.com/reference/android/net/wifi/p2p/package-summary.htmldemo: http://developer.android.com/resources/samples/WiFiDirectDemo/index.htmlOverview

http://stackoverflow.com/questions/3549508/prevent-caching-of-css-files-in-uiwebview-loaded-from-disk