实验报告
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课程名称 |
基于Android平台移动互联网开发 |
实验日期 |
2015.4.23 |
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实验项目名称 |
实验7 BindService模拟通信 |
实验地点 |
S30010 |
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实验类型 |
□验证型 √设计型 □综合型 |
学 时 |
2 |
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一、实验目的及要求（本实验所涉及并要求掌握的知识点） |
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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。 |
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二、实验环境（本实验所使用的硬件设备和相关软件） |
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(1)PC机 (2)操作系统：Windows XP (3)软件： Eclipse, JDK1.6，Android SDK，ADT |
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三、实验内容及步骤 |
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1）新建工程 2）修改布局文件main.xml 3）完善Activity类 |
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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） |
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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：
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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） |
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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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实验评语 |
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实验成绩 |
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指导教师签名： 年 月 日 |
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