1 //A. 怎么才能从资源文件中创建View呢？ 2 //////////////////////////////////////////// 3 //调用LAYOUT_INFLATER_SERVICE，从资源中创建layout. 4 //////////////////////////////////////////// 5 LayoutInflater inflater= (LayoutInflater)context.getSystemService( 6      Context.LAYOUT_INFLATER_SERVICE); 7 View v = inflater.inflate(R.layout.list_item, null); 8  9 //B. 手机底座(Dock)是一种外设，一般分为Car Dock和Desk Dock10 //11 //当插入手机底座时，我们可能需要带给用户不同的体验。12 //如：当插入Car Dock时，用户可能是将手机放在汽车的手机底座上，并很有可能正在开车途中。13 //此时我们应将某些界面转入驾驶模式，如精简用户界面、加大图标及文字的显示等，以方便用户操作。14 //15 //那么，我们应当如何了解手机底座的插入状态呢？16 //17 ////////////////////////////////////////////18 //使用UI_MODE_SERVICE查看当前手机的底座状态19 ////////////////////////////////////////////20 UiModeManager uiModeManager = (UiModeManager)getSystemService(Context.UI_MODE_SERVICE);21 switch(uiModeManager.getCurrentModeType())22 case Configuration.UI_MODE_TYPE_NORMAL:23   dockState.setText("no dock");24   break;25 case Configuration.UI_MODE_TYPE_CAR:26   dockState.setText("car dock mode");27   break;28 case Configuration.UI_MODE_TYPE_DESK:29 {30   dockState.setText("desk dock mode");31   break;32 }

 1 //示例3.3.2 2 //BinderService.java 3 public class BinderService extends Service { 4    5   public interface ICallback{ 6     //在收到Message时被调用 7     public void onMessage(String msg); 8   } 9   private Set<ICallback> mCallbackList = new HashSet<ICallback>();10   11   public class ServiceBinder extends Binder{12     //将收到的Message通知所有的Callback13     public void sendMessage(String msg){14        for (ICallback c : mCallbackList){15          c.onMessage(msg);16        }17     }18     19     //将Callback添加到链表20     public void RegisterCallback(ICallback callback){21        mCallbackList.add(callback);22     }23     24     //将Callback从链表中删除25     public void UnregisterCallback(ICallback callback){26        mCallbackList.remove(callback);27     }28   }29   private ServiceBinder mBinder = new ServiceBinder();30   @Override31   public IBinder onBind(Intent arg0) {32     return mBinder;33   }34 }

 1 //示例3.3.3 2 //ServiceTestActivity.java 3  4 public class ServiceTestActivity extends Activity{ 5   private ServiceBinder mService = null; 6    7   //实现Service的Callback, 当收到Message时, 使用Toast将其显示出来 8   private ICallback    mCallback = new ICallback(){ 9     @Override10     public void onMessage(String msg) {11        Toast.makeText(getApplication(), "Get message: " + msg, Toast.LENGTH_LONG).show();12     }13   };14   15   //在OnCreate时BindService16   //但需注意的时，此时Service还没有被绑定，而需要等到onServiceConnected执行时才能使用。17     @Override18     public void onCreate(Bundle savedInstanceState) {19         super.onCreate(savedInstanceState);20         bindService(new Intent(this, BinderService.class), mConnection, BIND_AUTO_CREATE);21     }22     23     //在onDestroy时unbindService，mService不应再被使用24     @Override25   protected void onDestroy() {26     if (mService != null){27        mService.UnregisterCallback(mCallback);28        unbindService(mConnection);29     }30     31     super.onDestroy();32   }33 34   private ServiceConnection mConnection = new ServiceConnection() {36     //Service绑定完成37         @Override38         public void onServiceConnected(ComponentName className,39                 IBinder service) {40          mService = (ServiceBinder) service;41          mService.RegisterCallback(mCallback);42          mService.sendMessage("Service Connected!");43         }45         //Service已断开46         @Override47         public void onServiceDisconnected(ComponentName className) {48          mService = null;49         }50     };51 }

 1 (2)    //示例3.3.4 2 (3)    //IRemoteService.aidl 4 (5)    package com.demo.service; 6 (7)    /* 7 (8)     * 在AIDL文件中只能使用一下类型的数据： 8 (9)     *  9 (10)     * 基础类型(int, long, boolean等)10 (11)     * String11 (12)     * CharSequence12 (13)     * List13 (14)     * Map14 (15)     */15 (16)    interface IRemoteService {16 (17)        int getVersion();(18)    }

 1 //示例3.3.5 2 //RemoteService.java 3 public class RemoteService extends Service { 4   private static final int VERSION = 1492; 5   public class RemoteBinder extends IRemoteService.Stub{ 6     @Override 7     public int getVersion() throws RemoteException { 8        return VERSION; 9     }   10   }11   private RemoteBinder mBinder = new RemoteBinder();12   @Override13   public IBinder onBind(Intent intent) {14     return mBinder;15   }16 }

1 //示例3.3.62 <serviceandroid:name="RemoteService">3   <intent-filter>4      <actionandroid:name="com.demo.service.action.REMOTE_SERVICE"/>5   </intent-filter>6 </service>

 1 //示例3.3.7 2 //注意：这里应该使用远程服务的action,而不能再直接用class 3 bindService(newIntent("com.demo.service.action.REMOTE_SERVICE"), mConnection,BIND_AUTO_CREATE); 4 //ServiceConnection 5   private ServiceConnection mConnection = new ServiceConnection() { 6     @Override 7     public void onServiceConnected(ComponentName name, IBinder service) { 8         //注意这里应该使用asInterface方法进行转换 9        mService = IRemoteService.Stub.asInterface(service);//(IRemoteService)service;10        Log.e("Alfred", "onServiceConnected" + mService);11        try {12          Log.e("Alfred", "version: " + mService.getVersion());13        } catch (RemoteException e) {14          e.printStackTrace();15        }16     }17     @Override18     public void onServiceDisconnected(ComponentName name) {19        mService = null;20     }21 };