2023學年完整公開課版自定義服務(wù)

《通信業(yè)務(wù)開發(fā)》課程自定義服務(wù)自定義服務(wù)使用方法屬性方法Start啟動PART26-3Bind啟動使用方法示例定義Service服務(wù)：新建服務(wù)類，并繼承Service覆寫onCreate、onStart、onDestroy編碼實現(xiàn)服務(wù)功能注冊Service服務(wù)：在AppManifest中注冊在應用程序中使用服務(wù)本地服務(wù)：startService啟動，stopService或stopSelf終止遠程服務(wù)：bindService啟動unbindService終止服務(wù)步驟publicclassMusicServiceextendsService{…………..}<serviceandroid:name=".MusicService"><intent-filter><actionandroid:name="com.musicplayer.START_AUDIO_SERVICE"/><categoryandroid:name="ent.category.default"/></intent-filter></service>startService(newIntent("com.musicplayer.START_AUDIO_SERVICE"));……stopService(newIntent("com.musicplayer.START_AUDIO_SERVICE"));No.方法及常量類型描述1publicstaticfinalintSTART_CONTINUATION_MASK常量繼續(xù)執(zhí)行Service2publicstaticfinalintSTART_STICKY常量用于顯式啟動和停Service3publicabstractIBinderonBind(Intentintent)普通設(shè)置Activity和Service之間的綁定4publicvoidonCreate()普通當一個Service創(chuàng)建時調(diào)用5publicintonStartCommand(Intentintent,intflags,intstartId)普通啟動Service，由startService()方法觸發(fā)6publicvoidonDestroy()普通Service銷毀時調(diào)用，由stopService()方法觸發(fā)屬性方法Service方法1No.方法類型描述1publicComponentNamestartService(Intentservice)普通啟動Service2publicbooleanstopService(Intentname)普通停止Service3publicbooleanbindService(Intentservice,ServiceConnectionconn,intflags)普通與Service綁定4publicvoidunbindService(ServiceConnectionconn)普通取消與Service綁定Activity中Service接口2Start啟動Start啟動定義Service1publicclassMusicextendsService{

privateMediaPlayerplayer=null;@OverridepublicIBinderonBind(Intentintent){returnnull;}publicvoidonStart(Intentintent,intstartId){

super.onStart(intent,startId);player=MediaPlayer.create(this,R.raw.because);player.start();

}

publicvoidonDestroy(){

super.onDestroy();player.stop();

}}Music服務(wù)Start啟動注冊服務(wù)2<manifestxmlns:android="/apk/res/android"package="com.musicplayer“android:versionCode="1"android:versionName="1.0“><uses-sdkandroid:minSdkVersion="4"/><applicationandroid:icon="@drawable/music"android:label="@string/app_name"><activityandroid:name=".MainAc"android:label="@string/app_name"android:theme="@android:style/Theme.Dialog"><intent-filter><actionandroid:name="ent.action.MAIN"/><categoryandroid:name="ent.category.LAUNCHER"/></intent-filter></activity>

<serviceandroid:name=".Music"><intent-filter><actionandroid:name="com.musicplayer.START_AUDIO_SERVICE"/><categoryandroid:name="ent.category.default"/></intent-filter></service></application></manifest>AndroidManifestStart啟動使用-StartService3publicclassMainAcextendsActivity{ButtonbtnStart,btnStop;TextViewtxtView;@Override

publicvoidonCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);setContentView(R.layout.main);

btnStart=(Button)findViewById(R.id.btnStart);btnStop=(Button)findViewById(R.id.btnStop);

txtView=(TextView)findViewById(R.id.textInfo);

}

publicvoidOnbtnStart(Viewview){startService(newIntent("com.musicplayer.START_AUDIO_SERVICE"));txtView.setText("因為愛情.mp3");}publicvoidOnbtnStop(Viewview){

stopService(newIntent("com.lily.MusicPlayer.START_AUDIO_SERVICE"));finish();}}MainAc啟動服務(wù)Bind啟動Bind啟動定義Service1publicclassMusicextendsService{

privateMediaPlayerplayer=null;@OverridepublicIBinderonBind(Intentintent){player=MediaPlayer.create(this,R.raw.because);player.start();returnnull;}@OverridepublicbooleanonUnbind(Intentintent){player.stop();returnsuper.onUnbind(intent);}publicvoidonStart(Intentintent,intstartId){

super.onStart(intent,startId);

}

publicvoidonDestroy(){

super.onDestroy();

}}Music服務(wù)Bind啟動注冊服務(wù)2<manifestxmlns:android="/apk/res/android"package="com.musicplayer“android:versionCode="1"android:versionName="1.0“><uses-sdkandroid:minSdkVersion="4"/><applicationandroid:icon="@drawable/music"android:label="@string/app_name"><activityandroid:name=".MainAc"android:label="@string/app_name"android:theme="@android:style/Theme.Dialog"><intent-filter><actionandroid:name="ent.action.MAIN"/><categoryandroid:name="ent.category.LAUNCHER"/></intent-filter></activity>

<serviceandroid:name=".Music"><intent-filter><actionandroid:name="com.musicplayer.START_AUDIO_SERVICE"/><categoryandroid:name="ent.category.default"/></intent-filter></service></application></manifest>AndroidManifestBind啟動使用-BindService3publicclassMainAcextendsActivity{ButtonbtnStart,btnStop;TextViewtxtView;

ServiceConnectionserviceConnection=newServiceConnection(){@OverridepublicvoidonServiceCo