Experiment six play audio and video in the app

Course Name		Mobile Internet development based on Android platform		Date of experiment	2016-4-21
Name of the experimental project		Play audio and video in the app		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)
1) Realize playback audio, audio playback control; 2) realize playback video, video playback control; 3) Use service services to play music from the project source file.
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. Import Project 2. Add Tmediaplayer, MyService, Video class, and MediaPlayer, video layout files. 3. Improve the activity class.
Four, the experimental results (the experimental source program list and operating results or experimental conclusions, experimental design drawings)
Code: One 1. Play music from the local file system Musicbutton.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub String sdcard=environment. getexternalstoragedirectory (). GetPath (); Try { Mediaplayer.setdatasource (sdcard+file. Separator+ "Music.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 { Mediaplayer.prepare (); } catch (IllegalStateException e) { TODO auto-generated Catch block E.printstacktrace (); } catch (IOException e) { TODO auto-generated Catch block E.printstacktrace (); } Mediaplayer.start (); Toast. Maketext (Tmediaplayer. This, "playing music in the local file system", Toast. length_short). Show (); } }); 2. Play music from the project source file using service services Public class MyService extends Service { Private MediaPlayer MP; @Override Public IBinder Onbind (Intent arg0) { TODO auto-generated Method stub return null; } @Override Public void onCreate () { Super. OnCreate (); Mp=mediaplayer. Create (this, R.raw. AA); Log. I ("Aaaaaaaaa", "Musicservice OnCreate is run"); } Public int Onstartcommand (Intent Intent, int flags, int startid) { TODO auto-generated Method stub Mp.start (); Log. I ("Gggggggggggg", "Musicservice Onstartcommand is run"); Toast. Maketext (MyService. This, "playing music from source file ~", Toast. length_short). Show (); return Super. Onstartcommand (Intent, flags, Startid); } 3. Play Video File file=new file ("/sdcard/movies/shudu.mp4"); Log. I ("VVVVVVVVVVVVV", "33333333333"); mccontroller=New Mediacontroller (Video. this); if (File.exists ()) { Videoview.setvideopath (File.getabsolutepath ()); Videoview.setmediacontroller (Mccontroller); Videoview.requestfocus (); Try { Videoview.start (); }catch(Exception e) { E.printstacktrace (); } Log. I ("Ffffffff", "33333333333"); Videoview.setoncompletionlistener (new Oncompletionlistener () { @Override Public void oncompletion (MediaPlayer arg0) { TODO auto-generated Method stub } }); 4. Stop Music playback Pausebtn.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub StopService (Intent); Mediaplayer.stop (); Toast. Maketext (Tmediaplayer. This, "Stop playing", Toast. length_short). Show (); } }); 5. Exit Exitbtn.setonclicklistener (new Onclicklistener () { @Override Public void OnClick (View arg0) { TODO auto-generated Method stub StopService (Intent); Intent.setclass (Tmediaplayer. this, loginactivity. class); StartActivity (Intent); } }); Run Result: () First, play local file music Second, play the source file music Third, stop playing music Iv. playing video
Five, Experimental summary (analysis of the results of the experiment, experience and improvement of experimental ideas)
Through this experiment, basically understand the way to play audio and video, but the process encountered a lot of problems. For example, creating a class with the same name as the definition object interferes with the recognition of the object and directly errors. Also video playback failed to implement, after clicking the Play Video button, jump to play the video after the page, pop "can ' t play this video" error, has not been able to find the reason.
Experimental reviews
Experimental results			Guide Teacher Signature: Date

Experiment six play audio and video in the app