2023年安卓Android廣播線程服務(wù)與多媒體開發(fā)實(shí)驗(yàn)報(bào)告

實(shí)驗(yàn)報(bào)告（2023/2023學(xué)年第一學(xué)期）課程名稱軟件技術(shù)系列課程（Andr。id基礎(chǔ)）實(shí)驗(yàn)名稱Android廣播、線程、服務(wù)與多媒體開發(fā)實(shí)驗(yàn)時(shí)間2023年12月9日指導(dǎo)單位計(jì)算機(jī)學(xué)院、誠邁科技（南京）公司指導(dǎo)教師學(xué)生姓名班級(jí)學(xué)號(hào)學(xué)院（系）計(jì)算機(jī)學(xué)院專業(yè)軟件工程（計(jì)算機(jī)軟件與服務(wù)外包）成批閱人王彥日期2023-12-四、實(shí)驗(yàn)小結(jié)（涉及問題和解決方法、心得體會(huì)等）.對(duì)于sendBroadCast的intent對(duì)象，需要設(shè)立其actionname；.推薦使用顯式指明receiver,在配置文獻(xiàn)AndroidManifest.xml指明;.一個(gè)receiver可以接受多個(gè)action;.每次接受廣播都會(huì)重新生成一個(gè)接受廣播的對(duì)象，再次調(diào)用onReceive;.在BroadCast中盡量不要解決太多邏輯問題，建議復(fù)雜的邏輯交給Activity或者Service去解決。通過這次實(shí)驗(yàn)，讓我對(duì)Broadcast、特別是Service有了更進(jìn)一步的結(jié)識(shí)，還讓我意識(shí)到編程方面和知識(shí)體系機(jī)構(gòu)方面存在的局限性?？傊?這次實(shí)驗(yàn)讓我Android編程能力有了一定的提高。運(yùn)用這次實(shí)驗(yàn),也將我們的大作業(yè)更加完善。

績(jī)09實(shí)驗(yàn)報(bào)告實(shí)驗(yàn)名稱Android廣播、線程、服務(wù)與多媒體開發(fā)指導(dǎo)教師實(shí)驗(yàn)類型實(shí)驗(yàn)實(shí)驗(yàn)學(xué)時(shí)4實(shí)驗(yàn)時(shí)間2023-12-9一、實(shí)驗(yàn)?zāi)康暮鸵?guī)定驗(yàn)證Broadcast的發(fā)送與接受驗(yàn)證多線程間的數(shù)據(jù)傳遞驗(yàn)證Service的使用方法驗(yàn)證多媒體開發(fā)中音頻、視頻、或圖像的采集與播放編寫一個(gè)Android小程序規(guī)定：1、使用廣播傳遞數(shù)據(jù)或信息2、使用多線程3＞適當(dāng)應(yīng)用Service4、實(shí)現(xiàn)至少一種多媒體功能二、實(shí)驗(yàn)環(huán)境(實(shí)驗(yàn)設(shè)備)PC(Window7).Eclipse三、實(shí)驗(yàn)原理及內(nèi)容在這個(gè)程序中涉及到了Receiver和BroadcastReceiver的結(jié)合使用,一方面在AndroidManifest.xml中注冊(cè)Receiver,實(shí)現(xiàn)可以在后臺(tái)播放音樂的功能。通過CommandReceiver類實(shí)現(xiàn)接受前臺(tái)Activity發(fā)送的播放命令的Intent。在CommandReceiver類中,有后臺(tái)Service注冊(cè)的接受前臺(tái)控制命令I(lǐng)ntent的Receiver,廣播播放狀態(tài)變化的Intent代碼pub1icclassMusicServiceextendsServiceimp1ementsRunnable{?privateMediaP1ayerp1ayer；privateList<Music>lists;publicstaticint_id=1;//當(dāng)前播放位置。pub1icstaticBooleanisRun=true;。publicLrcProcessmLrcProcess;。pub1icLrcViewmLrcView；publiestaticintpLaying_id=0;publicstaticBocleanpLaying=false;@0verride。publicIBinderonBind(Intentarg0){。//TODOAuto-generatedmethodstubooreturnnull；。}@0verride?pub1icvoidonCreate(){//TODOAuto—generatedmethodstub。。lists=MusicList,getMusicDa?a(getApp1icationContext());。oSeekBarBroadcastReceiverreceiver=newSeekBarBroadcastReceiver()；。IntentFi1terfi1ter=newIntentFiIter(".kar1.seekBar")；。this.registerReceiver(receiver,filter)；?newThread(this),start();。。super.onCreate();)@0verridepub1icvoidonStart(Intentintent,intstartId){TODOAuto—generatedmethodstubStringplay=intent.getStringExtra("play");—id=intent.getIntExtra("id",1)；。。訐(play,equals("play")){(nul1!=p1ayer){ooooplayer.release()；。…player=null;03。}。。。p1ayMusic(_id);?}elseif(play.equa1s("pause")){(null!=player){…p1ayer.pause();000}。。}e1seif(play.equals("playing")){°。。if(player!=null){。o。叩1ayer.start();。。}e1se{p1ayMusic(_id)；}e1seif(play.equals("replaying")){??}elseif(play.equals("first")){。ointid=intent,getintExtra("id",0);。。p1ayMusic(id);。}elseif(play.equals("rewind**)){。ointid=intent.getIntExtra("id",0);oooplayMusic(id);so}elseif(play.equals("forward")){oeointid=intent.getlntExtra("id'1,0)；。playMusic(id);。。}elseif(play.equals("last")){。bintid=intent.getIntExtra("id",0)；。splayMusic(id);。｝。privatevoidplayMusic(intid){。/////////////////////////初始化歌詞配置〃〃〃///unu1111////iiomLrcProcess=newLrcProcess();。//讀取歌詞文獻(xiàn)。mLrcProcess.readLRC(lists.get(_id).getUri());。//傳回解決后的歌詞文獻(xiàn)o1rcList=mLrcProcess.getLrcContent();。。MusicActivity.Lrc_view,setSentenceEntities(1rcList);°°切換帶動(dòng)網(wǎng)顯示歌詞MusicActivity.Lr(?_kiew.setAnimation(AnimationUtils.LoadAnimation(。。。MusicService.this,R.anim.a/pha_z));，〃啟動(dòng)線程?mHandler.post(mRunnab1e);。?！?/〃/////〃//〃〃////〃初始化歌詞配置〃///〃///〃〃〃〃//III//if(null!=player){。。叩layer,release()；??player=nu11;°}。if(id>=lists.size()-1){s。5_id=lists.size()—1;a0}elseif(id<=0){，_id=0;00}。Musicm=lists.get(_id);oostringurl=m.getUr1();o?UrimyUri=Uri.pc?rse(url);oplayer=newMediaPlayer()；。。player.reset();?p1ayer.setAudioStreamType(AudioManager.STREAM_MUSIC)；。atry(。。。player,setDataSource(getApplicationContext(),myUri);。player,prepare();。。}catch(11lega1ArgumentExceptione){。。//TODOAuto-generatedcatchb1ocks。e.printStackTrace();。。}catch(SecurityExceptione){。?！═ODOAuto—generatedcatchb1ock。e.printStackTrace();}catch(I1legalStateExceptione){。。。//TODOAuto—generatedcatchblock。a。e.printStackTrace();}catch(IOExceptione){。。?！═ODOAuto-generatedcatchbiock。。。0.printStackTrace()；eo}player.start();叩1ayer.setOnCompletionListener(newOnComp1etionListener(){。@Overrideao&publicvoidonCompletion(MediaPlayermp){。。。。//TODOAuto—generatedmethodstub。。//下一首，。。if(MusicActivity.isLoop==true){。。。叩1ayer.reset()；o??Intentintent=newIntent(".karp1etion")；ooooosendBroadcast(intent);s。。_id=_id+1;ooooplayMusic(_i(/);。。。}else{//單曲播放。。。。player.re$et();。a?aIntentintent=newIntent(".p1etion");…3。sendBroadcast(intent);°b°°叩］ayMusic(_/d)；oooo)0Q。}。。});。player.setOnErrorListener(new0nErrorListener(){ooo@0verride。。。publicboo1eanonError(MediaP1ayermp,intwhat,intextra){。。?！═ODOAuto-generatedmethodstubcooif(nu11!=player){?！璸1ayer.release()；。。p1ayer=null;006}oMusicm=lists.get(_id);oooStringur1=m.getUrl();ooosUrimyllri=Uri.parse(url);。。。。player=newMediaP1ayer();?！璸layer.reset();ooooplayer.setAudioStreamType(AudioManager.STREAM_MUSIC)：。。。，。player.setDataSource(getApplicationContext(),myllri)；。a。。player.prepare();。。。。}catch(IliegalArgumeritExceptione){3//TODOAuto-generatedcatchblock。。。3。e.printStackTrace();°。。，}catch(SecurityExceptione){。。?！═ODOAuto-generatedcatchblocke.printstackTrace();。。。。}catch(IllegalStateExceptione){。。。//TODOAuto-generatedcatchb1ock—oe.printStackTrace();。s}catch(lOExceptione){。。。。//TODOAuto-generatedcatchblock。。。oe.printStackTrace();OQ0}。。。。player.start();。。。，returnfaIse;，)00})；°}。privatec1assSeekBarBroadcastReceiverextendsBroadcastReceiver(。。@0verride。。publicvoidonReceive(Contextcontext,Intentintent){。a//ToDoAuto—generatedmethodstub。ointseekBarPosition=intent.getlntExtra("seekBarPosition”,0)；。。。//System.out.println("-"+seekBarPosition);。。?player.seekTo(seekBarPosition*player.getDuration()/100);。?player.start()；。}o@0verridepublicvoidrun(){o//TODOAuto-generatedmethodstub。while(isRun){。atry{°。。3Thread.sLeep(200)；。}catch(InterruptedExceptione){。。。//TODOAuto—generatedcatchblockooooe.printStackTrace()；00}oif(nu11!=p1ayer){。。intposition=player,getCurrentPosition();totai=p1ayer.getDuration();。。。Intentintent=newIntent("gress")；。。。。intent.putExtra("position",position);intent.putExtra("total",totai)；。sendBroadcast(intent)；。)。。。訐(nu11!=player){(player.isPlaying()){0oc,opLaying=true;°°0°}else{。。。。。pLaying=false；d0d}eoo},}。}HandlermHandler=newHandler();。//歌詞滾動(dòng)線程。RunnablemRunnab1e=newRunnable(){。。@Override。。publicvoidrun(){。。?！═ODOAuto—generatedmethodstub。。MusicActivity.trc_v/ew.SetIndex(Lrclndex());o???MusicActivity.Lrc_view.invalidate();?mHand1er.postDe1ayed(mRunnable,100);d0}};。//創(chuàng)建對(duì)象privateList<LrcContent>IrcList=newArrayList<LrcContent