深入解读Android的内部进程通信接口AIDL

reply->writeInt32(getCardReaderSize());
int mid = data.readInt32();

package com.zlc.provider;
 
import android.os.Parcel;
import android.os.Parcelable;
 
public class Students implements Parcelable{
  private int stu_id;
  private String stu_name;
  public Students(Parcel source){
    stu_id = source.readInt();
    stu_name = source.readString();
  }
  public int getStu_id() {
    return stu_id;
  }
  public void setStu_id(int stu_id) {
    this.stu_id = stu_id;
  }
  public String getStu_name() {
    return stu_name;
  }
  public void setStu_name(String stu_name) {
    this.stu_name = stu_name;
  }
  @Override
  public int describeContents() {
    // TODO Auto-generated method stub
    return 0;
  }
  @Override
  public void writeToParcel(Parcel dest, int flags) {
    // TODO Auto-generated method stub
    dest.writeInt(stu_id);
    dest.writeString(stu_name);
  }
  //Interface that must be implemented and provided as a public CREATOR field that generates instances of your Parcelable class from a Parcel. 
  public final static Parcelable.Creator CREATOR = new Parcelable.Creator() {
 
    @Override
    public Students createFromParcel(Parcel source) {
      // TODO Auto-generated method stub
      return new Students(source);
    }
 
    @Override
    public Students[] newArray(int size) {
      // TODO Auto-generated method stub
      return new Students[size];
    }
  };
}

package com.zlc.aidl;
import com.zlc.aidl.DemoParcelable;
import com.zlc.aidl.AIDLCallback;
interface IMyAidlService{
  void registerClient(AIDLCallback cb);//注册回调
  void saveDemoInfo(in DemoParcelable demo);//实际调用方法
}

package com.zlc.aidl;
import com.zlc.aidl.DemoParcelable;
import java.util.List;
interface AIDLCallback {
  int returnResult(out List list,int a);//回调给客户端
  void testMethod(out Bundle params);//用来测试参数in/out的使用
}

package com.zlc.aidl;
parcelable DemoParcelable;

mRemote.transact(Stub.TRANSACTION_testMethod, _data, _reply, 0);
_reply.readException();
if ((0!=_reply.readInt())) {
params.readFromParcel(_reply);
}

if ((params!=null)) {
_data.writeInt(1);
params.writeToParcel(_data, 0);
}
else {
_data.writeInt(0);
}
mRemote.transact(Stub.TRANSACTION_testMethod, _data, _reply, 0);
_reply.readException();

@Override
  public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    Log.d(TAG, "MyAidlService onBind");
    return mBinder;
  }
 
  private final IMyAidlService.Stub mBinder = new IMyAidlService.Stub() {
    private AIDLCallback cb;
 
    @Override
    public void saveDemoInfo(DemoParcelable demo) throws RemoteException {
      if (demo != null) {
        if ("meinv1".equals(demo.getDemo_name())) {
          demo.setDemo_name("meinv2");
        }
        list.add(demo);
        Log.d(TAG, "saveDemoInfo list.size = " + list.size() + " list = " + list);
        cb.returnResult(list, 5);
        Bundle params = new Bundle();
        cb.testMethod(params);
        int width = params.getInt("width", 0);
        int height = params.getInt("height", 0);
        Log.d(TAG, "width = " + width + " height = "+height);
      }
    }
 
    @Override
    public void registerClient(AIDLCallback cb) throws RemoteException {
      cb.asBinder().linkToDeath(new DeathRecipient() {
        @Override
        public void binderDied() {
          try {
            Log.i(TAG, "[ServiceAIDLImpl]binderDied.");
          } catch (Throwable e) {
          }
        }
      }, 0);
    }
  };

private ServiceConnection mRemoteCOnnection= new ServiceConnection() {
 
    @Override
    public void onServiceDisconnected(ComponentName name) {
      // TODO Auto-generated method stub
      Log.d(TAG, "onServiceDisconnected");
    }
 
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      // TODO Auto-generated method stub
      Log.d(TAG, "onServiceConnected");
      mRemoteService = (IMyAidlService) IMyAidlService.Stub
          .asInterface(service);
      if(mRemoteService != null)
        Log.d(TAG, "onServiceConnected success");
    }
  };
……
btn.setOnClickListener(new OnClickListener() {
 
      @Override
      public void onClick(View v) {
        // TODO Auto-generated method stub
        String actiOnName= "com.zlc.aidl.server.MyAidlService";
        Intent intent = new Intent(actionName);
        boolean ret = bindService(intent, mRemoteConnection,
            Context.BIND_AUTO_CREATE);
        Log.d(TAG, " ret &＃63;=" + ret);
        if (ret) {
          new Thread(new Runnable() {
 
            @Override
            public void run() {
              // TODO Auto-generated method stub
              try {
                DemoParcelable demo = new DemoParcelable();
                List list = new ArrayList();
                list.add("like dance");
                demo.setDemo_id((Integer) img.getTag());
                demo.setDemo_name("meinv1");
                demo.setDemo_list(list);
                mRemoteService.registerClient(callback);
                mRemoteService.saveDemoInfo(demo);
              } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
              }
            }
          }).start();
 
        }
      }
    });
  }
……
private final AIDLCallback callback = new AIDLCallback.Stub() {
     
 
    @Override
    public int returnResult(List list, int a)
        throws RemoteException {
      if (list != null)
        Log.d(TAG, "list.size = " + list.size()+"  a="+a);
      for (DemoParcelable demoParcelable : list) {
        doFresh(demoParcelable);
      }
      return 0;
    }
 
    @Override
    public void testMethod(Bundle outParams) throws RemoteException {
      // TODO Auto-generated method stub
      if (outParams != null) {
        outParams.putInt("width", 11);
        outParams.putInt("height", 12);
      }
 
    }
  };