实验7 BindService 模拟通信

实验报告

课程名称		基于Android平台移动互联网开发		实验日期	2015.4.23
实验项目名称		实验7 BindService模拟通信		实验地点	S30010
实验类型		□验证型    √设计型    □综合型		学  时	2
一、实验目的及要求（本实验所涉及并要求掌握的知识点）
1）         实现从启动端传递一个数据至BindService端； 2）         实现使用BindService服务播放项目源文件中的音乐； 3）         实现在启动端通过“增加”和“降低”两个按钮控制音频音量大小。 4）         实现在启动端通过“暂停”按钮控制音频暂停播放。
二、实验环境（本实验所使用的硬件设备和相关软件）
(1)PC机 (2)操作系统：Windows XP (3)软件： Eclipse, JDK1.6，Android SDK，ADT
三、实验内容及步骤
1）新建工程  2）修改布局文件main.xml 3）完善Activity类
四、实验结果（本实验源程序清单及运行结果或实验结论、实验设计图）
代码：     Main public class MainActivity extends Activity {     private BService.MyBinder binder;             private ServiceConnection conn=new ServiceConnection() {         @Override         public void onServiceDisconnected(ComponentName arg0) {             // TODO Auto-generated method stub             System.out.println("Service is disconnected");         }           public void onServiceConnected(ComponentName arg0, IBinder service) {             // TODO Auto-generated method stub             System.out.println("Service Connected");             binder = (MyBinder)service;             BService bs = binder.getService();             int volum=bs.getvolum();           }     };         @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.music);          Bundle bundle = getIntent().getExtras();             Intent itmusic=new Intent();             itmusic.setClass(MainActivity.this, BService.class);             bindService(itmusic, conn, Context.BIND_AUTO_CREATE);                                   music public class Music extends Activity{     private BService binder;     private SeekBar seekBar;     double setting;     private Bundle bundle;     private CheckBox btnsilent;      AudioManager audioManager;      private MediaPlayer player=new MediaPlayer();     @SuppressLint("NewApi")     @Override     protected void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         setContentView(R.layout.music);         bundle =getIntent().getExtras();         btnsilent=(CheckBox)findViewById(R.id.checkBox1);         int current =bundle.getInt("current");         seekBar=(SeekBar) findViewById(R.id.seekBar1);          Button btn=(Button)findViewById(R.id.button1);                         int music=(int) (((double)current/14)*100);          seekBar.setProgress(music);           binder=((MyBinder)bundle.getBinder("backmusic")).getService();                         Toast.makeText(Music.this, "current volum:"+String.valueOf(music), Toast.LENGTH_LONG).show();             seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {                         public void onStopTrackingTouch(SeekBar arg0) {                 // TODO Auto-generated method stub                 Toast.makeText(Music.this, "current volum:"+String.valueOf((int) setting), Toast.LENGTH_LONG).show();             }                         public void onStartTrackingTouch(SeekBar arg0) {                 // TODO Auto-generated method stub               }                         public void onProgressChanged(SeekBar arg0, int progress, boolean arg2) {                 // TODO Auto-generated method stub                                 setting=(progress/100)*14;                 binder.setvolum((int)setting);             }                       });           btnsilent.setOnCheckedChangeListener(new OnCheckedChangeListener() {                         @Override             public void onCheckedChanged(CompoundButton arg0, boolean arg1) {                 boolean isChecked;                 // TODO Auto-generated method stub                 binder.setsilent(arg1);         }         });                                btn.setOnClickListener(new OnClickListener() {                                 @Override                 public void onClick(View arg0) {                     // TODO Auto-generated method stub                                         player=MediaPlayer.create(Music.this, R.raw.nanshannan);                     player.start();                 }             });     }               @Override         public boolean onOptionsItemSelected(MenuItem item) {             // TODO Auto-generated method stub             switch (item.getItemId()){                 case  android.R.id.home:{                     finish();                     break;                 }             }             return super.onOptionsItemSelected(item);         }     }     BService public class BService extends Service{           MediaPlayer player;     AudioManager audioManager;     private int current;     private boolean isquite=false;     private MyBinder binder=new MyBinder();           public class MyBinder extends Binder{         public BService getService()         {             return BService.this;                     }     }               public int getvolum(){         current=audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);          return current;     }      public void setsilent(boolean isquite){          if(isquite){              getvolum();              audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, 0, 0);          }else{              audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, current, 0);          }      }          public void setvolum(int setting){                  audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, setting, 0);              current=setting;                   }                                  @Override     public IBinder onBind(Intent arg0) {         // TODO Auto-generated method stub         System.out.println("Service is Binded");         return binder;     }     public void onCreate() {         // TODO Auto-generated method stub         super.onCreate();         System.out.println("Service is Created");         player =MediaPlayer.create(BService.this, R.raw.nanshannan);         player.start();         audioManager=(AudioManager)getSystemService(Context.AUDIO_SERVICE);         super.onCreate();         player.setOnCompletionListener(new OnCompletionListener() {                         @Override             public void onCompletion(MediaPlayer arg0) {                 // TODO Auto-generated method stub                 player.start();             }         });     }     public int onStartCommand(Intent intent, int flags, int startId) {         // TODO Auto-generated method stub         player.start();         return super.onStartCommand(intent, flags, startId);     }     public void onDestroy() {         // TODO Auto-generated method stub         super.onDestroy();         if(player.isPlaying()){              player.stop();              System.out.println("Service is Destroyed");     }     }       运行截图：
五、实验总结（对本实验结果进行分析，实验心得体会及改进意见）
实验的内容挺好玩的，根据老师讲的步骤跟方法都能成功的完成实验，十分有意义，下次再接再厉,可是还是有点遗憾，网络的播放方法无法播发。
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