Android可以通过Binder的onTrensact方法来完成通信，下面就来简单试下下，还是前面那个根据序号查询名字的例子：

服务端实现：

/** * Created by Jay on 2015/8/18 0018. */public class IPCService extends Service {    private static final String DESCRIPTOR = "IPCService";    private final String[] names = { "B神", "艹神", "基神", "J神", "翔神" };    private MyBinder mBinder = new MyBinder();    private class MyBinder extends Binder {        @Override        protected boolean onTransact(int code, Parcel data, Parcel reply, int flags) throws RemoteException {            switch (code) {            case 0x001: {                data.enforceInterface(DESCRIPTOR);                int num = data.readInt();                reply.writeNoException();                reply.writeString(names[num]);                return true;            }            }            return super.onTransact(code, data, reply, flags);        }    }    @Override    public IBinder onBind(Intent intent) {        return mBinder;    }}

可以看到onTransact有四个参数
code ， data ，replay ， flags

code 是一个整形的唯一标识，用于区分执行哪个方法，客户端会传递此参数，告诉服务端执行哪个方法;
data客户端传递过来的参数;
replay服务器返回回去的值;
flags标明是否有返回值，0为有（双向），1为没有（单向）。

客户端实现：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private EditText edit_num;    private Button btn_query;    private TextView txt_result;    private IBinder mIBinder;    private ServiceConnection PersonConnection = new ServiceConnection() {        @Override        public void onServiceDisconnected(ComponentName name) {            mIBinder = null;        }        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mIBinder = service;        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bindViews();        // 绑定远程Service        Intent service = new Intent("android.intent.action.IPCService");        service.setPackage("com.jay.ipcserver");        bindService(service, PersonConnection, BIND_AUTO_CREATE);        btn_query.setOnClickListener(this);    }    private void bindViews() {        edit_num = (EditText) findViewById(R.id.edit_num);        btn_query = (Button) findViewById(R.id.btn_query);        txt_result = (TextView) findViewById(R.id.txt_result);    }    @Override    public void onClick(View v) {        int num = Integer.parseInt(edit_num.getText().toString());        if (mIBinder == null) {            Toast.makeText(this, "未连接服务端或服务端被异常杀死", Toast.LENGTH_SHORT).show();        } else {            android.os.Parcel _data = android.os.Parcel.obtain();            android.os.Parcel _reply = android.os.Parcel.obtain();            String _result = null;            try {                _data.writeInterfaceToken("IPCService");                _data.writeInt(num);                mIBinder.transact(0x001, _data, _reply, 0);                _reply.readException();                _result = _reply.readString();                txt_result.setText(_result);                edit_num.setText("");            } catch (RemoteException e) {                e.printStackTrace();            } finally {                _reply.recycle();                _data.recycle();            }        }    }}

Android例子—直接通过Binder的onTransact完成跨进程通信

服务端实现：

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