【導讀】設計學習、實踐和努力工作所取得的成果。據(jù)本人查證，除了文中特別加。我承諾，設計作品和論文中的所有內容均真實、可信。手機是現(xiàn)代生活非常普遍的隨身通訊工具。尤其是智能手機的出現(xiàn)和普及使移動。計算成為一件十分簡單的事情。移動記賬的優(yōu)勢在于人們對發(fā)生中的經(jīng)濟活動即時進。行記錄，保證了消費記錄的精確性。人們可以實時的監(jiān)控自己的資產(chǎn)數(shù)量和消費狀況。通過這樣系統(tǒng)的記賬，從而進一步實現(xiàn)生活目標。方便、可靠性高、存儲量大、保密性好、壽命長、成本低等。這些優(yōu)點能夠極大地提。存儲，實現(xiàn)選擇式的操作減少用戶手動輸入的時間，具有初步的智能提醒記賬功能，收入和支出管理模塊：實現(xiàn)收支數(shù)據(jù)的增刪改查。餅圖報表顯示模塊：實現(xiàn)按類別對數(shù)據(jù)進行餅圖的顯示。桌面快捷記賬模塊：實現(xiàn)添加桌面快捷鍵與快捷記賬界面。[6]伯內特著，田俊靜等，Android基礎教材(第3版)（美），人民郵電出版社，

　　

【正文】 t five years ago. Smallfootprint operating systems such as Linux, or even an embedded version of Microsoft Windows, have bee more prevalent on many embedded devices. Around this time in device evolution, cell phones branched from other embedded devices onto their own path. This branching is evident when you examine their architecture. Nearly since their inception, cell phones have been fringe devices insofar as they run on proprietary software—software that is owned and controlled by the manufacturer, and is almost always considered to be a “closed” system. The practice of manufacturers using proprietary operating systems began more out of necessity than any other reason. That is, cell phone manufacturers typically used hardware that was pletely developed inhouse, or at least hardware that was specifically developed for the purposes of running cell phone equipment. As a result, there were no openly available, offtheshelf software packages or solutions that would reliably interact with their hardware. Since the manufacturers also wanted to guard very closely their hardware trade secrets, some of which could be revealed by allowing access to the software level of the device, the mon practice was, and in most cases still is, to use pletely proprietary and closed software to run their devices. The downside to this is that anyone who wanted to develop applications for cell phones needed to have intimate knowledge of the proprietary 浙江萬里學院 畢業(yè)論文（設計）報告紙 .21. ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┆┆ ┆ environment within which it was to run. The solution was to purchase expensive development tools directly from the manufacturer. This isolated many of the “homebrew” developers. NOTE A growing culture of homebrew developers has embraced cell phone application development. The term “homebrew” refers to the fact that these developers typically do not work for a cell phone development pany and generally produce small, oneoff products on their own time. Another, more pelling “necessity” that kept cell phone development out of the hands of the everyday developer was the hardware manufacturers’ solution to the “memory versus need” dilemma. Until recently, cell phones did little more than execute and receive phone calls, track your contacts, and possibly send and receive short text messages。 not really the “Swiss army knives” of technology they are today. Even as late as 2020, cell phones with cameras were not monly found in the hands of consumers. By 1997, small applications such as calculators and games (Tetris, for example) crept their way onto cell phones, but the overwhelming function was still that of a phone dialer itself. Cell phones had not yet bee the multiuse, multifunction personal tools they are today. No one yet saw the need for Inter browsing, MP3 playing, or any of the multitudes of functions we are accustomed to using today. It is possible that the cell phone manufacturers of 1997 did not fully perceive the need consumers would have for an allinone device. However, even if the need was present, a lack of device memory and storage capacity was an even bigger obstacle to overe. More people may have wanted their devices to be allinone tools, but manufacturers still had to climb the memory hurdle. To put the problem simply, it takes memory to store and run applications on any device, cell phones included. Cell phones, as a device, until recently did not have the amount of memory available to them that would facilitate the inclusion of “extra” programs. Within the last two years, the price of memory has reached very low levels. Device manufacturers now have the ability to include more memory at lower prices. Many cell phones now have more standard memory than the average PC had in the mid1990s. So, now that we have the need, and the memory, we can all jump in and develop cool applications for cell phones around the world, right? Not exactly. Device manufacturers still closely guard the operating systems that run on their devices. While a few have opened up to the point where they will allow some Javabased applications to run within a small environment on the phone, many do not allow this. Even the systems that do allow some Java apps to run do not allow the kind of access to the “core” system that standard desktop developers are accustomed to having. Open Handset Alliance and Android This barrier to application development began to crumble in November of 2020 when Google, under the Open Handset Alliance, released Android. The Open Handset Alliance is a group of hardware and software developers, including Google, NTT DoCoMo, Sprint Nextel, and HTC, whose goal is to create a more open cell phone environment. 浙江萬里學院 畢業(yè)論文（設計）報告紙 .22. ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 裝 ┊ ┊ ┊ ┊ ┊ 訂 ┊ ┊ ┊ ┊ ┊ 線 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┆┆ ┆ The first product to be released under the alliance is the mobile device operating system, Android. (For more information about the Open Handset Alliance, see .) With the release of Android, Google made available a host of development tools and tutorials to aid wouldbe developers onto the new system. Help files, the platform software development kit (SDK), and even a developers’ munity can be found at Google’s Android website, This site should be your starting point, and I highly encourage you to visit the site. NOTE Google, in promoting the new Android operating system, even went as far as to create a $10 million contest looking for new an