Experimental seven Bindservice analog communication

Lab Report

Course Name		Mobile Internet development based on Android platform		Date of experiment	April 22, 2016
Name of the experimental project		Bindservice Analog Communication		Location of the experiment	S30010
Type of experiment		-Verification Type √ design type-comprehensive type		Hours	2
The purpose and requirements of the experiment (the knowledge points which are involved in this experiment and are required to be mastered)
1. Achieve two-way communication between the start-up and Bindservice; 2. Implement a data transfer from the start-up to the bindservice end; 3. Realize the use of Bindservice service to play the music in the project source file; 4. The implementation of the "increase" and "reduce" two buttons to control the audio volume at the start-up side; 5. Implement the "Pause" button on the boot side to control the audio pause playback.
second, the experimental environment (the hardware equipment and related software used in this experiment)
(1) PC Machine (2) Operating system: Windows XP (3) Software: Eclipse, jdk1.6,android Sdk,adt
Third, the contents and steps of the experiment
1. Create a new project called Musicvolumecontrol; 2. Create a new two Java file named Bservicemusic and musicsetting, and write the relevant code in it; 3. Create a new XML file named Musicsetting and associate it with the Musicsetting.java file to refine the code; 4. Add a pair of tags to the androidmanifest.xml.
Four, the experimental results (the experimental source program list and operating results or experimental conclusions, experimental design drawings)
Code: In Mainactivity.java: Public class Mainactivity extends Activity { Private MediaPlayer mediaplayer=New MediaPlayer (); Private TextView TView; Private Bservicemusic.mybinder Binder; Private int Musicvolume; Private Button startbtn,pausebtn,exitbtn; Private Serviceconnection connection=New serviceconnection () { @Override Public void onservicedisconnected (componentname arg0) { TODO auto-generated Method stub } @Override Public void onserviceconnected (componentname arg0, IBinder arg1) { TODO auto-generated Method stub Binder= (Bservicemusic.mybinder) arg1; } }; @Override protected void onCreate (Bundle savedinstancestate) { Super. OnCreate (savedinstancestate); Setcontentview (r.layout. Activity_main); tview= (TextView) Findviewbyid (r.id. TextView1); Startbtn= (Button) Findviewbyid (r.id. Startbtn); Pausebtn= (Button) Findviewbyid (r.id. Pausebtn); Exitbtn= (Button) Findviewbyid (r.id. Exitbtn); Intent intent1=New Intent (mainactivity. this, bservicemusic. class); Bindservice (Intent1, Connection, Service. Bind_auto_create); Final Intent Intent=getintent (); Startbtn.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub Mediaplayer=mediaplayer. Create (Mainactivity. this, R.raw. nan); Mediaplayer.start (); } }); Pausebtn.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub if (Mediaplayer.isplaying ()) { Mediaplayer.pause (); }Else{ Mediaplayer.start (); } } }); Exitbtn.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub if (Mediaplayer.isplaying ()) { Mediaplayer.release (); } } }); } @Override protected void OnDestroy () { TODO auto-generated Method stub if (Mediaplayer.isplaying ()) { Mediaplayer.stop (); } Mediaplayer.release (); Super. OnDestroy (); } @Override Public boolean oncreateoptionsmenu (Menu menu) { Inflate the menu; This adds items to the action bar if it is present. Getmenuinflater (). Inflate (R.menu. Main, menu); return true; } @Override Public boolean onoptionsitemselected (MenuItem item) { TODO auto-generated Method stub Switch (Item.getitemid ()) { Case R.id. item1: Musicvolume=binder.getvolume (); Intent intent=New Intent (mainactivity. this, musicsetting. class); Bundle bundle=New bundle (); Bundle.putint ("Musicvolume", Musicvolume); Intent.putextras (bundle); StartActivity (Intent); Finish (); break; default: break; } return Super. onoptionsitemselected (item); } } In Bservicemusic.java: Public class Bservicemusic extends service{ Private MediaPlayer MediaPlayer; Private Audiomanager Audiomanager; Private Mybinder Binder=new mybinder (); Public class Mybinder extends binder{ Public int Getvolume () { return audiomanager.getstreamvolume (Audiomanager. Stream_music); } } @Override Public IBinder Onbind (Intent arg0) { TODO auto-generated Method stub return null; } @Override Public void onCreate () { TODO auto-generated Method stub Super. OnCreate (); Audiomanager= (Audiomanager) Getsystemservice (Context. Audio_service); Mediaplayer=mediaplayer. Create (this, R.raw. nan); Mediaplayer.start (); } } In Musicsetting.java: Public class Musicsetting extends activity{ Private ProgressBar Musicbar; @Override protected void onCreate (Bundle savedinstancestate) { TODO auto-generated Method stub Super. OnCreate (savedinstancestate); Setcontentview (r.layout. Musicsetting); Musicbar= (ProgressBar) Findviewbyid (r.id. ProgressBar1); Bundle bundle=New bundle (); Bundle=getintent (). Getextras (); Musicbar.setprogress (Bundle.getint ("Musicvolume")); } } Run Result: () Initial interface: To decrease the volume: To increase the volume:
Five, Experimental summary (analysis of the results of the experiment, experience and improvement of experimental ideas)
This experiment is not done on the basis of Sudoku games, but instead of re-creating a project and adding code in it to control the volume changes. The experimental process is difficult, refer to the teacher code to complete.
Experimental reviews
Experimental results			Guide Teacher Signature: Date

Experimental seven Bindservice analog communication