android service传递并获取参数 之 transact

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原创：kylin_zeng  http://blog.chinaunix.net/uid/23795897.html在此感谢mars 老师的帮助。转载请注明原创出处，尊重他人的劳动成果。

1、在AndroidManifest.xml：   <service android:name="com.example.transact.SecondService"></service>

2、建立两个按钮,绑定和发送：

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1. package com.example.transact;
   
2. 
   
3. import android.os.Binder;
   
4. import android.os.Bundle;
   
5. import android.os.IBinder;
   
6. import android.os.Parcel;
   
7. import android.os.RemoteException;
   
8. import android.app.Activity;
   
9. import android.content.ComponentName;
   
10. import android.content.Intent;
    
11. import android.content.ServiceConnection;
    
12. 
    
13. import android.view.Menu;
    
14. import android.view.View;
    
15. import android.view.View.OnClickListener;
    
16. import android.widget.Button;
    
17. 
    
18. public class MainActivity extends Activity {
    
19.     
    
20.     private Button button1;    
    
21.     private Button button2;
    
22.     
    
23.     private Binder binder;
    
24. 
    
25.     
    
26.     @Override
    
27.     protected void onCreate(Bundle savedInstanceState) {
    
28.         super.onCreate(savedInstanceState);
    
29.         setContentView(R.layout.activity_main);
    
30.         
    
31.         button1=(Button)findViewById(R.id.button1);
    
32.         button2=(Button)findViewById(R.id.button2);
    
33.         
    
34.         button1.setOnClickListener(new OnClickListener() {
    
35.             
    
36.             @Override
    
37.             public void onClick(View v) {
    
38.                 // TODO Auto-generated method stub
    
39.                 Intent intent=new Intent();
    
40.                 intent.setClass(MainActivity.this, SecondService.class);
    
41.                 bindService(intent, conn, BIND_AUTO_CREATE);       //绑定。
    
42.             }
    
43.         });
    
44.         
    
45.     
    
46.     
    
47.         button2.setOnClickListener(new OnClickListener() {
    
48.             
    
49.             @Override
    
50.             public void onClick(View v) {
    
51.                 // TODO Auto-generated method stub
    
52.                 Parcel data =Parcel.obtain();
    
53.                 Parcel reply=Parcel.obtain();
    
54.                 
    
55.                 data.writeString("from activity : data");        
    
56.                 
    
57.                 
    
58.                 try {
    
59.                     ////这些参数就传递到secondservice里面去了，但如果secondservice onTransact 没有执行完，就在这里阻塞。
    
60.                     binder.transact(0, data, reply, 0);
    
61.                     
    
62.                     String s=reply.readString();
    
63.                     System.out.println("reply from SecondService--->"+ s);
    
64.                     
    
65.                 } catch (RemoteException e) {
    
66.                     // TODO Auto-generated catch block
    
67.                     e.printStackTrace();
    
68.                 }
    
69.             }
    
70.         });
    
71.     }
    
72.     
    
73.     @Override
    
74.     public boolean onCreateOptionsMenu(Menu menu) {
    
75.         // Inflate the menu; this adds items to the action bar if it is present.
    
76.         getMenuInflater().inflate(R.menu.activity_main, menu);
    
77.         return true;
    
78.     }
    
79.     
    
80.     ServiceConnection conn = new ServiceConnection() {
    
81.         
    
82.         @Override
    
83.         public void onServiceDisconnected(ComponentName name) {
    
84.             // TODO Auto-generated method stub
    
85.             
    
86.             
    
87.         }
    
88.         
    
89.         @Override
    
90.         public void onServiceConnected(ComponentName name, IBinder service) {
    
91.             // TODO Auto-generated method stub
    
92.             MainActivity.this.binder=(Binder)binder;
    
93.         }
    
94.     };
    
95.     
    
96.     
97. }

4、然后就可以传输到SecondService 里面了

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1. package com.example.transact;
   
2. 
   
3. import android.app.Service;
   
4. import android.content.Intent;
   
5. import android.os.Binder;
   
6. import android.os.IBinder;
   
7. import android.os.Parcel;
   
8. import android.os.RemoteException;
   
9. 
   
10. public class SecondService extends Service {
    
11. 
    
12.     @Override
    
13.     public IBinder onBind(Intent arg0) {
    
14.         // TODO Auto-generated method stub
    
15.         return new MyBinder();
    
16.     }
    
17. 
    
18.     class MyBinder extends Binder{
    
19. 
    
20.         @Override
    
21.         protected boolean onTransact(int code, Parcel data, Parcel reply,
    
22.                 int flags) throws RemoteException {
    
23.             // TODO Auto-generated method stub
    
24.             System.out.println("code--->"+ code);
    
25.             String s=data.readString();
    
26.             System.out.println("data--->"+ data);
    
27.             
    
28.             reply.writeString("from service: relay");
    
29.             
    
30.             return super.onTransact(code, data, reply, flags);
    
31.         }
    
32.         
    
33.         
    
34.     }
    
35.     
    
36. }

编译为通过。
Transact.rar