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思路转换的失败

针对的用户群体动辄就是全球目标用户，在商业判断和分析上，最基础的一个考量就是用户群体和业务模式的总量的收益是否足够大，对用户群体的研究和商业判断分析完全根据市场分析报告和数据来做判断。因此，不可避免地在程序创意思路上会沿用以前的工作思路和分析方法。 在考虑Android上的创意的同时，不自觉地就考虑和分析了如下几个方面的问题： 1. 是否为用户所必需？ 2. 技术上是否领先？ 3. 程序的粘性是否足够？ 4. 用户群体是否足够大？ 因此，沿用这个思路，不可避免地就会往大的应用和大的服务上去思考和做出判断。

经过反复地反省和对比，初步得出了这样的失败教训： 1. 对于个人开发者和小型团队来说，不适合做过于基础的程序。操作的模式和理念上的创新与用户的接受度有相当的距离。这样的事情只有大公司才有财力和可能进行推广。比如说手机生产商，他们可以通过预置的方式进行推广。而对个人开发者来说，得先证明你的想法是成功的，不能假设一个会成功的需求和应用，然后卖给设备厂商。 2. 个人开发者和小型团队不适合做大的程序，尤其是开发时间不要超过2个月。4个人，3个月的时间，对于一个小团队来说 ，是相当宝贵的。这不仅仅是时间和金钱的问题，更多的是信心问题。 3. 用户能否真正接受你的想法，是一个关键性的问题。设想和推导都很完美，唯独缺了用户是否真正喜欢和接受这一条，又没有方法进行快速地验证和试错，基本上不能成功。

Eclipse 编译 Android工程时，提示该错误 ：Error generating final archive: Debug certificate expired on xxxxxx（日期） 解决办法： linux：Window－－》Preferences－－》Android－－》Build中Default debug keystore显示了地址“/home/jinli/.android/debug.keystore”，删除此路径下的debug.keystore及 ddms.cfgWindow XP：进入：C:Documents and SettingsAdministrator.android 删除：debug.keystore及 ddms.cfg

Then I went ahead and installed 2.2 and now when > I type sqlite3 in the shell it says sqlite3 not found....  Any ideas? Well, it's in the 2.2 emulator image, for what that's worth. -- Mark Murphy (a Commons Guy)

An AppWidgetProvider is a BroadcastReceiver. That gives you two possibilities right off the bat: 1. Have it also handle whatever other Intents you were planning on setting up with a separate BroadcastReceiver, or 2. Send an Intent from whatever component you want to the AppWidgetProvider. In other words, don't worry about trying to talk directly to the app widget (which I suspect is impossible) -- just talk to your code that already talks to the app widget.

I update my widget from within my app, when I delete/add entries to a list. To do this, I have a method (updateWidget) and a static String (UPDATE_ACTION). My updateWidget() method sends a broadcast which is received by the widget class and then calls onUpdate() with the appropriate params: private void updateWidget() {                 Intent i = new Intent(this, TVWidget.class);                 i.setAction(TVWidget.UPDATE_ACTION);                 sendBroadcast(i);         } In TVWidget class: @Override         public void onReceive(Context context, Intent intent) {                 String action = intent.getAction();                 if (action != null && action.equals(UPDATE_ACTION)) {                         final AppWidgetManager manager = AppWidgetManager.getInstance (context);                         onUpdate(context, manager,                                         manager.getAppWidgetIds(new ComponentName(                                                         context, TVWidget.class)                                         )                         );                 }                 else {                         super.onReceive(context, intent);                 }         } This seems to work fine.

施密特说：“按照目前发展趋势，Android手机有望在全球手机市场扮演第一或第二的角色。”除 向手机厂商提供Android软件外，谷歌还发布了自有品牌智能手机Nexus One。 施密特表示：“我们的合作伙伴每天Android手机出货量约为6.5万部。如果你经常访问博客网站，就会发现一些有关Android手机出 货量的估计数字远远低于实际情况。”

美国市场研究公司NPD近日发布的统计数据显示，今年第一季度期间，Android手机在美国市场 的销量已超过iPhone，占据该季度美国智能手机总销量的28%，iPhone相应份额为21%，而加拿大智能手机制造商RIM的黑莓 (BlackBerry)手机相应市场份额仍居第一，为36%。

施密特周四表示：“我们的手机市场战略与其他厂商不同。我 们向各大手机厂商免费提供Android软件，这是具有变革意义的举动。我们希望建立起一个开放环境，这一点与其他手机厂商的市场策略正好相反。” 谷歌联合创始人拉里·佩奇(Larry Page)周四也出席了谷歌股东年度大会。他当天表示，采用Android软件的智能手机型号数量增加后，将有利于谷歌搜索总量的增长，并使谷歌其他业务 也受益，“智能手机产品逐步成熟后，我们将能够制定出相应盈利方案。” 施密特称，自 己同意佩奇的看法，“虽然我们已向各大手机厂商免费提供Android软件，但与Android手机平台相关的应用程序和服务具有巨大增长潜力。今后 5~10年内，手机应用程序和服务将成为业务范围极为广泛的产业，其市场价值不容小视。”

// go full screen WindowManager.LayoutParams attrs = mActivity.getWindow().getAttributes (); attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN; mActivity.getWindow().setAttributes(attrs); // go non-full screen WindowManager.LayoutParams attrs = mActivity.getWindow().getAttributes (); attrs.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN); mActivity.getWindow().setAttributes(attrs);

<!-- 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.

Mark Murphy is the founder of CommonsWare and is the author of _The Busy Coder's Guide to Android Development_, _The Busy Coder's Guide to *Advanced* Android Development_, and _Android Programming Tutorials_.

Removing the window's background can be achieved very easily by using a custom theme. To do so, first create a file called res/values/theme.xml containing the following:

<resources>    <style name="Theme.NoBackground" parent="android:Theme">        <item name="android:windowBackground">@null</item>    </style></resources>

You then need to apply the theme to your activity by adding the attribute android:theme="@style/Theme.NoBackground" to your <activity /> or <application /> tag. This trick comes in very handy for any app that uses a MapView, a WebView or any other full screen opaque view.

These applications use an OnScrollListener to detect when the last item is displayed. When this happens, they load more items and add them to the list adapter.

SizzlingSkizzorsProgrammer wrote: > After the listview is already initialized, is it possible to add items > to it during runtime? Just add the new items to the adapter, or the data source that backs up the adapter (if it's a CursorAdapter).

> 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.

来自AndroidLib.com的最新统计数 据显示，2010年3月，Android应用市场里的应用增加了9331个。通过历史对比，这些数字更加惊人。比如，去年12月，新增 Android应用为3807个，到1月份为止，新增应用为4458个，2月新增5532个。3月新增9331个。如果Android保持这种增长趋势， 其应用数量很有可能在今天达到5位数，从而对苹果形成有力竞争

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

google最后给的判决书： Hi, After further review from our abuse team we have confirmed that your account that was closed was modifying the ad behavior which is strictly prohibited as stated in the AdSense policies. These types of violations pose a significant risk to advertisers and for this reason we can no longer work with you through any partnering AdSense account or product offering. This will be the final communication about this issue. Please do not reply to this email as you will not receive a response. Thank you for your understanding. Google AdSense 我们自始至终都不知道原因。

我Google了下 "modifying the ad behavior " 就是指你修改了 Google提供的 adsense js code 或者 sdk 唯一有可能的就是这里了 GoogleAdView adView = (GoogleAdView) activity.findViewById(R.id.ad<http://r.id.ad/> ); if (adView != null) { View vc = adView.getCurrentView(); if (vc instanceof WebView) { ((WebView) vc).destroy(); } View vn = adView.getNextView(); if (vn instanceof WebView) { ((WebView) vn).destroy(); } } 因为用了adsense之后 我们的程序老是crash 从stack trace看是因为Google adsense sdk 引起的. 资源没有释放. 然后去Adsense的那个mail list AFMA 问了 碰到2个都有同样问题的 然后有人给了个code 因为adsense sdk没有destroy ad view  所以要手动destroy下 我们就在每个有ads的activty的 onDestroy 加上这段 就好了 程序没有crash了 结果就被搞了 连负责我们android adsense sales都事先不知道 adsense team就直接把我们封了 还在beta 测试阶段的东西 还有bug  我们只是加了这个保证他资源正常释放不会影响到我们程序 结果就挂了 而且Google的态度巨NX无比 连个申述的途径都没有  只是给了个link类似事后调查

我刚刚给我的sale发了一封信： Hi Sunil, It has been long that I haven't talked to you. I have a question, when I went to the application register page, I found the page layout was changed and some of my apps were gone. For example UK TV Guide, Australia TV Guide, etc. Also, the published status are all "false". I am confused because I am still seeing my ads are clicked in the daily report. Is there anything wrong? I am nervous because I just knew that an AdSense developer's account was disabled without any warning,  and the developers themselves don't know the reason. I don't want that happened on me so I really appreciate your comment. below is the letter in AFMA group. Looking forward to your reply. Thanks. Cheers, Luke 接下来我引用了superdroid的信。看看他怎么说吧。

PackageInfo pInfo = null; try {         pInfo = getPackageManager().getPackageInfo("com.beanie.test", PackageManager.GET_META_DATA);         } catch (NameNotFoundException e) {                 e.printStackTrace(); } System.out.println(pInfo.versionCode);