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Google 员工 Damon Horowitz 曾经是多家创业公司的联合创始人。他最近一次创业是 Aardvark 问答网站，然后就被 Google 收购。Damon Horowitz 的有趣之处在于，他拥有一个哲学博士学位，在公司内部大家称他为“哲学家”。

一旦话题涉及到了科技领域的伦理道德，Horowitz 就会问大家是喜欢 iPhone 还是 Android 。当大多数人回答说“喜欢 iPhone ”时，Horowitz 就开玩笑地说你们是“冤大头”，只是因为外表漂亮而选择设备

这个结果很可怕。我们更在乎手机功能的强大，而不在乎这些功能是否在道德框架之内。”

按我理解，layout_gravity 属性是用于设置View 与其容器的对齐关系的，但实际使用中 却发现 似乎不是这样，请看如下代码： <?xml version="1.0" encoding="utf-8"?> <LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:background="#AA009988">     <TextView         android:id="@+id/my_view"         android:layout_width="220dip"         android:layout_height="100dip"         android:text="sdfasdfsdfsdf\nsdfjlwjesd"         android:background="#889900AA"         *android:layout_gravity="center"* /> </LinearLayout> 我为 TextView 设置了 *layout_gravity="center"*- ，本来它应该在父容器中 垂直和水平 居中的，但事实上只是水平居中了，垂直方向并未居中。 我再进一步通过 *layout_gravity="**center_vertical**"* ，但仍然无法垂直居中，请问这是为什么呢？

你可以在最外面的 LinearLayout 加上android:gravity="center". Vertical LinearLayout中， layout_gravity 设置成center无法垂直剧中，是因 为container的排版被限制为从上到下, 试想一下，如果按照你的逻辑，假设第一个child layout_gravity设置成bottom,   第二个childlayout_gravity设置成top,  那么第一个就会跑到第二个下面了。 所以， 当你设置整个linearlayout为垂直， layout_gravity中， 只有 left, right, center_ horizontal 管用的。 tj

Authentication with App Engine, regardless of where you're doing it, is a three-stage process: Obtain an authentication token. This can be done with ClientLogin for installed apps, for example, or with AuthSub for a webapp. When logging in directly to an application, this is the part of the login process where your user sees a Google signin screen. Take that authentication token, and use it to obtain an authentication cookie. Use that authentication cookie in all subsequent requests.

<uses-permission android:name="android.permission.GET_ACCOUNTS"></uses-permission> <uses-permission android:name="android.permission.USE_CREDENTIALS"></uses-permission> <uses-permission android:name="android.permission.INTERNET"></uses-permission>

> Now I just want to update the GUI from this method. > Can I somehow call a method in PushEndpointDemo.java? No, for two reasons: 1. Because C2DMReceiver is a manifest-registered BroadcastReceiver and therefore has no access to any activities 2. There might not be an activity, since you have no control over the timing of when the C2DM message is received (e.g., the user pressed BACK, the user pressed HOME) > Do I need a Broadcast Intent to do this? Possibly. -- If you want to update an activity or else ignore the message, have C2DMReceiver send out a private broadcast, picked up by a receiver registered via registerReceiver() in the activity -- If you want to update an activity or else raise a notification, have C2DMReceiver send out an ordered broadcast, as described here: http://commonsware.com/blog/2010/08/11/activity-notification-ordered-... -- If you want to update a database, call startActivity() on an IntentService, and have it do the database I/O, plus possibly broadcast an Intent to update an activity/raise a notification.

A bunch of sample apps for Android. Simple workarounds and examples for doing things on Android. Custom Progress Bar - A customized Progress Bar for android with your own animation Drag and Drop widgets on Android Ongoing notifications on Android HTML with images in a Text View Custom Expandable List Views on Android Custom List View - Phonebook Example Custom Title Bar Android WebView, Javascrip and CSS Unzip files on Android

我今天说的，无关于功能，也无关于布局，而在于资源命名。 我是这样发现问题的，我的应用《千字文》发布两天内获得了大概600个安装，但是有三个用户说他们无法安装，错误是“安装包没有正确的签名”。用户们的 共同点是他们都是1.5的固件。怎么会出现这样的事情呢？我在发布之前使用我的1.6固件的G2进行测试的，没有在1.5固件上测试过，这是因为我在开 发时功能和布局都是以1.5固件为基准做的，我很有信心不会在1.5上出现异常。于是我尝试在1.5固件的虚拟机上安装我的apk文件，果然遇到了用户 提到的错误。我检查了AndroidManifest.xml文件，miniSDK是3，也没有1.5不支持的配置选项，没问题的。于是Google 之，发现了解决方案。 原来1.5和它之前的固件都有bug，就是对资源文件（asset或者res目录下的文件）的命名解析的不好，具体的错误我也没有仔细看，大概的意思就 是，资源文件的名字和数量的组合和排列有可能会造成某些资源文件无法被解析。我们无法得知哪些名字是无法解析的，也不知道哪些资源文件数量是恰好不能解 析的。我们可以做的，就是在打包之后，发布之前，自己在1.5固件（或之前的固件）上进行安装测试。通过了就好，通不过就尝试改几个资源文件的名字，或 者增加一个或几个dummy文件，再打包，直到测试安装成功。 我的应用就是在我改了一个资源文件的名字之后通过了1.5的安装测试。 希望我说的明白。重点：发布之前，务必在1.5固件上进行测试安装。

On an HTC Hero, this EXTRA_OUTPUT doesn't even work. It doesn't put your picture in the file you specify, but it hands it to you thru a Mediastore uri. Apparently, the only way to get a full size picture is to do all camera handling in your app instead of using the IMAGE_CAPTURE intent.

I think Google have missed a trick on this one. They have defined standard intents for media capture, but not specified standard responses (ie. the "data" parameter in the onActivityResult Activity callback method). Other Android vendors (e.g. HTC Hero) have created their own Camera applications that handle the standard IMAGE_CAPTURE intent, but return different data & have different ways to save/return the image information. All I want is to be able to fire a IMAGE_CAPTURE intent from my own app, and get back a Uri reference to the captured image. Simple. I have no requirement to further manipulate the image .. I just need the Uri to store in my app's database for future reference.

OnScrollListner there is an example in the API demos. On Tue, Oct 13, 2009 at 2:12 PM, wangxueming <m.wongxm...@gmail.com> wrote: > Now I want to make a  ListView,with 20 items, > Then when it scroll to the end, > I get new data and add to the end of ListView dynamic. > Just Like ListView in Android Market.

You can try my EndlessAdapter for that: http://github.com/commonsguy/cwac-endless

Google Chrome to Phone Extension is a project consisting of a Chrome Extension, Android App, and supporting AppEngine server that enables users to send links from their Chrome desktop browser to their Android device using Android's Cloud to Device Messaging service.

If you're managing the cursor yourself the cleanest way to go is probably this: Cursor cursor = getContentResolver().query(...); try {     // read from the cursor and do stuff } finally {     if (cursor != null) cursor.close(); }

Another option if you still want to use Activity.managedQuery() is to get your information and then: stopManaging(cursor); cursor.close(); Cheers, Justin Android Team @ Google

This widget allows users to input their address, and perform validation on this by talking to an address data server. The UI part is Android-specific, but there is potential to re-use the backend and have different UIs (such as GWT) that interface with it. More information will be written here soon on how to integrate this with your android project and our future plans with regards to making the widget available outside the Android environment.

oogle's common Java library for parsing, formatting, storing and validating international phone numbers. Optimized for running on smartphones. A direct port to Javascript is also available.

<!-- Variation on the Light theme that turns off the title --><style name="Theme.IOSched" parent="android:style/Theme.Light">    <item name="android:windowNoTitle">true</item>    <item name="android:windowContentOverlay">@null</item></style>

The android:windowContentOverlay is your shadow, and setting it to @null in your theme will eliminate it. You can see this in action in the Google I|O 2010 conference app, which uses many of the same UI conventions as does the new Twitter app. However, right now, the Twitter app has not yet been open-sourced, which is why I point you to the I|O app. The code fragment above is from that app's styles.xml resource.

The <uses-library> reference is required