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如何实现程序后台运行 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
编制的程序软件，在手机中运行时，程序放在后台或者手机锁屏，计时软件程序就会停止计时，再次切换到前端才可以继续运行，有没有方法能够使程序软件可以在后台锁屏的情况下持续运行。
创业者：在寻找 不迷茫 - 资讯 - 清泛网 - 专注C/C++及内核技术
...8万，他大呼承受不起。
“现在投资人选项目书都开始用软件选择了。”杨贝明说。据他观察，项目书太多，投资人通过软件设定，直接屏蔽掉他们不喜欢的。另外，来中关村创业大街找项目的真正投资人也已经不多了，大多数...
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...
MongoDB was featured on FLOSS Weekly this week - http://twit.tv/floss105
A database using a similar concept is CouchDB which was featured on another FLOSS Weekly: http://twit.tv/floss36
I think it's worth listening to those in addition to the links provided by @marcgg
...
Android studio: new project vs new module
...ontain code that's specific to a device type, such
as Wear OS or Android TV. Android Studio automatically creates module
directories, such as source and resource directories, and a default
build.gradle file appropriate for the device type. Also, Android
Studio creates device modules with rec...
How to customize a Spinner in Android
...item);
spinner.setAdapter(adapter);
R.layout.simple_spinner_item
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
style="@style/spinnerItemStyle"
android:maxLines="1"
android:layout_width="match_parent"
android:layout_heig...
How to render a PDF file in Android
...ttps://docs.google.com/gview?embedded=true&url="+LinkTo);
setContentView(mWebView);
}
}
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淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...这种设计思路很好地解决了不刷新页面就能请求到服务端最新的动态数据。
基于时间分片削峰
熟悉淘宝秒杀的都知道，第一版的秒杀系统本身并没有答题功能，后面才增加了秒杀答题，当然秒杀答题一个很重要的目的是为了...
Difference between android-support-v7-appcompat and android-support-v4
...rt Library (A Support library which provides important widgets for Android TV)
Relevant links
Support Library Features
Support Library Packages
Support Library Features Guide
What is Multidex and what is the use of Multidex Support Library?
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What is the definition of “interface” in object oriented programming
... outputs (display on the screen, sound, etc.). However, when you look at a TV that is not plugged in, you are projecting your expected semantics into an interface. For all you know, the TV could just explode when you plug it in. However, based on its "interface" you can assume that it won't make any...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
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《App Inventor 2 MQTT拓展入门（保姆级教程）》
最新版拓展下载：
de.ullisroboterseite.ursai2pahomqtt.aix
MQTT（Message Queuing Telemetry Transport：消息队列遥测传输）
MQTT 发明于 1999 年，为物联网设计的轻量级协议，基于TCP协议...