【導(dǎo)讀】短信過濾的功能。界面設(shè)計(jì)新穎時(shí)尚。對于用戶的個(gè)性化要求有。一定的適應(yīng)能力。指導(dǎo)教師評語（①基礎(chǔ)理論及基本技能的掌握；②獨(dú)立解決實(shí)際問題的能力；隨著手機(jī)的普及，它的功能也越來越強(qiáng)大?，F(xiàn)代社會，手機(jī)已經(jīng)不是打電話。發(fā)短信那么簡單。隨著移動互聯(lián)網(wǎng)的崛起，人們對手機(jī)的依賴也越來越強(qiáng)。對傳統(tǒng)的互聯(lián)網(wǎng)也有了一定的沖擊。自從谷歌發(fā)布Android開源系統(tǒng)后，它越來?？梢灶A(yù)見，Android手機(jī)定會造就NOKIA的輝煌。言，做Android手機(jī)應(yīng)用會有很大的市場。戶提供更好的基于Android平臺短信管理軟件。包括短信的安全處理與短信的快捷處理。機(jī)號碼過濾；快捷處理，主要是在一些特殊場合，給用戶提供一些人性化的服務(wù)，使你的手機(jī)更加智能，提高生活質(zhì)量。

　　

【正文】 n Handset Alliance (visibly led by Google), Android is a widely anticipated open source operating system for mobile devices that provides a base operating system, an application middleware layer, a Java software development kit (SDK), and a collection of system applications. Although the Android SDK has been available since late 2021, the first publicly available Androidready “G1” phone debuted in late October 2021. Since then, Android?s growth has been phenomenal: TMobile?s G1 manufacturer HTC estimates shipment volumes of more than 1 million phones by the end of 2021, and industry insiders expect public adoption to increase steeply in 2021. Many other cell phone providers have either promised or plan to support it in the near future. A large munity of developers has anized around Android, and many new products and applications are now available for it. One of Android?s chief selling points is that it lets developers seamlessly . extend online services to phones. The most visible example of this feature is—unsurprisingly—the tight integration of Google?s Gmail, Calendar, and Contacts Web applications with system utilities. Android users simply supply a username and password, and their phones automatically synchronize with Google services. Other vendors are rapidly adapting their existing instant messaging, social works, and gaming services to Android, and many enterprises are looking for ways to integrate their own internal operations (such as inventory management, purchasing, receiving, and so forth) into it as desktop and server operating systems have struggled to securely integrate such personal and business applications and services 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì)（論文） 第 34 頁 on a single platform。 although doing so on a mobile platform such as Android remains nontrivial, many researchers hope it provides a clean slate devoid of the plications that legacy software can cause. Android doesn?t official support applications eloped for other platforms: applications execute on top of a Java middleware layer running on an embedded Linux kernel, so developers wishing to port their application to Android must use its custom user interface environment. Additionally, Android restricts application interaction to its special APIs by running each application as its own user identity. Although this controlled interaction has several beneficial security features, our experiences developing Android applications have revealed that designing secure forward. Android uses a simple permission label assignment model to restrict access to resources and other applications, but for reasons of necessity and convenience, its designers have added several potentially confusing refinements as the system has evolved. This article attempts to unmask the plexity of Android security and note some possible development pitfalls that occur when defining an application?s security. We conclude by attempting to draw some lessons and identify opportunities for future enhancements that should aid in clarity and correctness. Android Applications The Android application framework forces a structure on developers. It doesn?t have a main() function or single entry point for execution—instead, developers must design applications in terms of ponents. Example Application. We developed a pair of applications to help describe how Android applications operate. Interested readers can dow nload the source code from our w ebsi Let?s consider a locationsensitive social working application for mobile phones in which users can discover their friends ?locations. We split the functionality into two applications: one for tracking friends and one for viewing them. As Figure 1 shows, the FriendTracker application consists of ponents specific to tracking friend locations (for example, via a Web service), storing geographic coordinates, and sharing those coordinates with other applications. The user then uses the FriendViewer application to retrieve the stored geographic coordinates and view friends on a map. Both applications contain multiple ponents for performing their respective tasks。 the ponents themselves are classified by their ponent types. An Android developer chooses from predefined ponent types depending on the ponent?s purpose (such as interfacing with a user or storing data).Component Types Android defines four ponent types: Activity? ponents define an application?s user interface. Typically, an application developer defines one activity per “screen.” Activities start each other, possibly passing and returning values. Only one activity on the system has keyboard and accessing focus at a time。 all others are suspended. Service ponents perform background processing. When an activity 中國礦業(yè)大學(xué) 2021 屆本科生畢業(yè)設(shè)計(jì)（論文） 第 35 頁 needs to perform some operation that must continue after the user interface disappears (such as download a file or play music), it monly starts a service specifically designed for that action. The developer can also use services as applicationspecific daemons, possibly starting on boot. Services often define an interface for Remote Procedure Call (RPC) that other system ponents can use to send mands and retrieve data, as well as register callbacks. Content provider ponents store and share data using a relational database interface. Each content provider has an associated “authority” describing the content it contains. Other ponents use the authority name as a handle to perform SQL queries (such as SELECT, INSERT, or DELETE) to read and write content. Although content providers typically store values in database records, data retrieval is implementationspecific—for example, flees are also shared through content provider interfaces. Broadcast receiver ponents act as mailboxes for messages from other applications. Commonly, applicatio