public class MainActivity extends Activity implements OnClickListener {  
	Button btnBind, btnPlay, btnPause;  
	IMyService mBinder; // 介面的一個引用  
	boolean mIsBind = false; // 繫結值為true,未綁定製為false;  
private ServiceConnection mConn = new ServiceConnection() {  
	@Override  
	public void onServiceDisconnected(ComponentName name) {  
  	}  
	@Override  
	public void onServiceConnected(ComponentName name, IBinder service) {  
            	/* 
             	* 獲得另一個程序中的Service傳遞過來的IBinder物件-service， 
              	* 用IMyService.Stub.asInterface方法轉換該物件，這點與程序內的通訊不同 
             	 */  
            mBinder = IMyService.Stub.asInterface(service);  
  	    mIsBind = true;  
            Log.i("MainActivity", "onServiceConnected....");  
        }  
    };   
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
	 super.onCreate(savedInstanceState);  
         setContentView(R.layout.activity_main);  
	 btnBind = (Button) findViewById(R.id.btn_bind);  
         btnPlay = (Button) findViewById(R.id.btn_play);  
         btnPause = (Button) findViewById(R.id.btn_pause);  
         btnBind.setOnClickListener(this);  
	 btnPlay.setOnClickListener(this);  
         btnPause.setOnClickListener(this);  
    }   
@Override  
public void onClick(View v) {  
 	Intent intent = new Intent();  
	int btn = v.getId();  
        switch (btn) {  
        case R.id.btn_bind:  
            intent.setAction(Constant.ACTION_AIDL);  
            bindService(intent, mConn, BIND_AUTO_CREATE);
	    //繫結服務
            break;  
        case R.id.btn_play:  
            if (mIsBind){  
                try {  
                    mBinder.play(); //呼叫IMyService介面的方法，服務端的邏輯就可以使用
                } catch (RemoteException e) {  
                    e.printStackTrace();  
                }//呼叫service中的play()  
            }  
               break;  
        case R.id.btn_pause:  
            if(mIsBind){  
                try {  
                   mBinder.pause(); //呼叫IMyService介面的方法
                } catch (Exception e) {  
                   e.printStackTrace();  
                }  
            }  
            break;  
        }  
    }  
}