Experiment 7 Bindservice Analog communication

Lab Report

Course Name		Mobile Internet development based on Android platform		Date of experiment	April 22
Name of the experimental project		Bindservice Analog Communication		Location of the experiment	S3010
Type of experiment		-Verification Type √ design type-comprehensive type		Hours
The purpose and requirements of the experiment (the knowledge points which are involved in this experiment and are required to be mastered)
Enables two-way communication between the start-up and Bindservice 1) The implementation of a data transfer from the start side to the Bindservice end; 2) realize the use of Bindservice service to play the music in the project source file; 3) enable the audio volume to be controlled by the "add" and "lower" two buttons on the boot side. 4) The implementation of the "Pause" button to control the audio pause playback on the boot side.
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
First, the design of the music settings of the XML layout file Second, the program to play music after login Third, in the music design to control the music volume size
Four, the experimental results (the experimental source program list and operating results or experimental conclusions, experimental design drawings)
Code: mainactivity Key code: Private int Mmusicvolume; Private Musicservice.mybinder Binder; ActionBar ActionBar; 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= (Musicservice.mybinder) arg1; } }; Intent intentser=New Intent (mainactivity. this, Musicservice. class); Bindservice (Intentser, Connection, Service. Bind_auto_create);//Play Music Case R.id. AI2://with value jump Item.setchecked (true); Mmusicvolume=binder.getvolume (); Intent intent=New Intent (); Intent.setclass (mainactivity. this, Music_main. class); Bundle bundle=New bundle (); Bundle.putint ("MUSICB", Mmusicvolume); Intent.putextras (bundle); StartActivity (Intent); break; musicservice Key code: MediaPlayer mp=New MediaPlayer (); Private Mybinder binder=New mybinder (); Public class Mybinder extends binder{ Public int Getvolume () { return am.getstreamvolume (AM. Stream_music); } } Public IBinder Onbind (Intent arg0) { TODO auto-generated Method stub return Binder; } @Override Public void onCreate () { Super. OnCreate ();//Initialize MediaPlayer object, ready to play music, music file in folder/res/raw Am= (Audiomanager) Getsystemservice (Context. Audio_service); String sdcard=environment. getexternalstoragedirectory (). GetPath (); Try { Mp.setdatasource (sdcard+file. Separator+ "Bjmusic.mp3"); } catch (IllegalArgumentException e) { TODO auto-generated Catch block E.printstacktrace (); } catch (SecurityException e) { TODO auto-generated Catch block E.printstacktrace (); } catch (IllegalStateException e) { TODO auto-generated Catch block E.printstacktrace (); } catch (IOException e) { TODO auto-generated Catch block E.printstacktrace (); } Try { Mp.prepare (); } catch (IllegalStateException e) { TODO auto-generated Catch block E.printstacktrace (); } catch (IOException e) { TODO auto-generated Catch block E.printstacktrace (); } Mp.start (); } @Override Public void OnDestroy () { Super. OnDestroy (); Stop playing music Mp.stop (); } music_main Key code: Public class Music_main extends activity{ Private RadioButton openmusic,closemusic; Private Radiogroup Who_group; MediaPlayer mediaplayer=New MediaPlayer (); Private SeekBar Musicseekbar; Private Audiomanager Audiomanager; Private int Currentvol,maxvol; @Override protected void onCreate (Bundle savedinstancestate) { TODO auto-generated Method stub Super. OnCreate (savedinstancestate); Setcontentview (r.layout. Music); Musicseekbar= (SeekBar) Findviewbyid (r.id. SeekBar1); Openmusic= (RadioButton) Findviewbyid (r.id. Opmusic); Closemusic= (RadioButton) Findviewbyid (r.id. Clomusic); who_group= (Radiogroup) Findviewbyid (r.id. Musicradiogroup); Bundle bundle=New bundle (); Bundle=getintent (). Getextras (); Musicseekbar.setprogress (Bundle.getint ("MUSICB")); Audiomanager= (Audiomanager) Getsystemservice (Context. Audio_service); Maxvol=audiomanager.getstreammaxvolume (Audiomanager. Stream_music); Musicseekbar.setmax (Maxvol); Who_group.setoncheckedchangelistener (new Radiogroup.oncheckedchangelistener () { @SuppressLint ("Newapi") @Override Public void oncheckedchanged (radiogroup arg0, int arg1) { TODO auto-generated Method stub Intent Intent=new Intent (Music_main. this, Musicservice. class); if (Arg1==r.id. Opmusic) { }Else if(arg1==r.id. Clomusic) { currentvol=0; Musicseekbar.setprogress (Currentvol); Audiomanager.setstreamvolume (audiomanager.stream_music, 0, 0); } } }); Musicseekbar.setonseekbarchangelistener (new Onseekbarchangelistener () { @Override Public void Onstoptrackingtouch (SeekBar arg0) { TODO auto-generated Method stub } @Override Public void Onstarttrackingtouch (SeekBar arg0) { TODO auto-generated Method stub } @Override Public void onprogresschanged (SeekBar arg0, int aarg1, boolean arg2) { TODO auto-generated Method stub Currentvol=audiomanager.getstreamvolume (Audiomanager. Stream_music); Musicseekbar.setprogress (Currentvol); Audiomanager.setstreamvolume (Audiomanager. Stream_music, AARG1, 0); } }); } } Run Result: ()
Five, Experimental summary (analysis of the results of the experiment, experience and improvement of experimental ideas)
The experiment is difficult, the code is difficult to understand, there are many details of the place want to achieve, but it takes a little time, such as Seekbar only point to open the background music to slide, point off can not slide, and do not know why click to close the background music Seekbar can not jump back to the initial 0 there (the actual is already 0 ), it takes a little bit to jump back.
Experimental reviews
Experimental results			Guide Teacher Signature: Date

Experiment 7 Bindservice Analog communication