【正文】 Button start。 Button jieshu。 String currentplay = /mnt/asec/。 MediaPlayer myMediaPlayer = new MediaPlayer()。 SeekBar sBar。 Handler handler = new Handler()。 public void onCreate(Bundle savedInstanceState) { (savedInstanceState)。 setContentView()。 String musiame = 。 musicinform = (TextView) findViewById()。 bianji = (Button) findViewById()。 start = (Button) findViewById()。 jieshu = (Button) findViewById()。 DBAdapter db = new DBAdapter(getApplicationContext())。 ()。 Cursor c = (musiame)。 String inform = 。 if (()) { inform = (2) + 作者 : + (3) + 出版日期： + (4)。 currentplay = (1)。 } ()。 ()。 ()。 try { (currentplay)。 } catch (IllegalArgumentException e) { // TODO Autogenerated catch block ()。 } catch (IllegalStateException e) { 25 // TODO Autogenerated catch block ()。 } catch (IOException e) { // TODO Autogenerated catch block ()。 } try { ()。 } catch (IllegalStateException e) { // TODO Autogenerated catch block ()。 } catch (IOException e) { // TODO Autogenerated catch block ()。 } (inform)。 sBar = (SeekBar) findViewById()。 (())。 setListener()。 } 程序運行截圖 26 5 總結 與展望 Android 操作系統(tǒng)是目前最火、前景最被看好的手機操作系統(tǒng)，基于 Android 平臺的手機點歌體統(tǒng)具有應用軟件具有功能實用、運行速度快、占用空間小、對硬件設備要求較低等優(yōu)點，具有很好的市場價值。 本 文討論了 Android 平臺上應用程序的設計原則、 點歌系統(tǒng) 的架構設計，功能模塊實現(xiàn)、配置文件的設計。 敘述了 音樂庫模塊的詳細設計及界面實現(xiàn)。論文 涉及 到Android 上應用程序的核心開發(fā)技術，包括 Activity 和 Service 生命周期的管理，組件與組件之的通信 ， Android 消息處理機制， 線程模型，界面切換和 Task 棧等內容。 本文具體實現(xiàn)了以下功能： 1）使用 SQLite 數(shù)據(jù)庫 存儲歌曲及相關信息； 2） 添加、刪除、查看歌曲的相關信息 ； 3） 對歌曲進行點播、編輯等相關操作 ； 4） 設置不同的條件 （ 名稱 、 作曲、出版時間等 ）進行查詢。 由于本人的水平有限，系統(tǒng)還存在很多值得改進的地方： 1） 進一步完善音樂庫模塊的功能。由于時間關系，本軟件只實現(xiàn)了播放列表和全部歌曲列表。根據(jù)用戶需求，可添加專輯列表和藝術家列表，列表可根據(jù)專輯名和藝術家名按字母順序進行排序，同時每個藝術家和專輯包含屬于該專 輯或藝術家的歌曲列表。 2） 添加播放模式。播放模式包括：隨機播放、列表循環(huán)、單曲循環(huán)等模式。該模式的實現(xiàn)可在后臺音樂服務模塊中實現(xiàn)，后臺音樂服務根據(jù)用戶設置的播放模式，從播放隊列里找到下一首播放的歌曲并打開，同時傳遞意圖給播放主界面，顯示播放的新歌曲。 3） 添加設置功能。即用戶可以根據(jù)需要設置自己喜歡的音效，播放模式等內容。 4） 添加與手機上其他應用程序交互的功能 ， 如把歌曲設置為手機鈴聲 。 27 參考文獻 28 致謝 29 為你提供優(yōu)秀的畢業(yè)論文參考資料，請您刪除以下內容， O(∩ _∩ )O 謝謝?。?！ A large group of tea merchants on camels and hors es from Northwes t China39。s S haanxi province pas s through a s top on the ancient S ilk Road, Gans u39。s Zhangye city during their journey to Kazak hs tan, May 5, 2021. Th e caravan, cons is ting of more than 100 camels , three hors e drawn carriages and four s upport vehicles , s tarted the trip from Jingyang county in S haanxi on S ept 19, 2021. It will pass through Gans u province and Xinjiang Uygur autonomous region, and finally a rrive in Almaty, formerly k nown as AlmaAta, the larges t city in Kazak hs tan, and Dungan in Zhambyl province. The trip will cover about 15,000 k ilometers and tak e the caravan more than one year to plete. The caravan is expected to return to Jingyang in March 2021. Then they will e back , carrying s pecialty products from Kazak hs tan A s mall art troupe founded s ix decades ago has grown into a hous ehold name in the Inner Mongolia autonomous region. In the 1950s , Ulan Mu qir Art Troupe was created by nine y oung mus icians , who toured remote villages on hors es and performed traditional Mongolian mus ic and dances for nomadic families . The 54 yearold was born in Tongliao, in eas tern Inner Mongolia and joined the troupe in s ays there are 74 branch troupes acros s Inner Mongolia and actors give around 100 s hows every year to local nomadic people. I can s till recall the days when I toured with the troupe in the early 39。80s. We s at on the back of pick up truck s for hours . The s k y was blue, and we couldn39。t help but s ing the folk s ongs , Nas un s ays . The vas tnes s of Inner Mongolia and the lack of entertainment options for people living there, made their lives lonely. The nomadic people were very excited about our vis its , Nas un recalls. We didn39。t have a formal s tage. The audience jus t s at on the gras s . Us ually, the performances became a big party with local people joining in. For him, the rewarding part about touring is n39。t jus t about s haring art with nomadic families but als o about gaining ins piration for the mus ic and dance. Ulan Muqir literally trans lates as red burgeon, and today39。s performers of the troupe s till tour the region39。s villages and entertain nomadic families , but their fame has s pread around the world. On May 16 and 17, nearly 100 s ingers and danc ers from the troupe performed at Beijing39。s Poly Theater. Their s how, titled Ulan Muqir on the Gras s land, depicted the his tory and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe s howed me where I belonged, Nas un, the art troupe39。s pres ident, who is als o a renowned tenor, tells China Daily. During a tour in 1985, he went to a village and met an elderly local man, wh o tol d him a s tory about his friends hip with a s olide r from S henyang, capital of Northeas t China39。s Liaoning province, decades ago. The s olider gave the old man a handmade s addle when they bid farewell. The s tory ins pired Nas un to write Carved S addle, a s ong that later became one of his mos t popular numbers . Now, every year, Nas un recruits young s ingers and dancers for the troupe. The troupe has als o des igned a new repertoire, which is mos tly bas ed on the daily lives of Mongolian people, es pecially the lives of nomadic families , and has bined contemporary m us ical elements with folk s ongs of the region. Haimu, a 2