Activity与Service数据交互：Binder、bindService的用法

 1 package com.lixu.jiaohu;
 2
 3 import com.lixu.jiaohu.MyAppService.Mybind;
 4
 5 import android.app.Activity;
 6 import android.app.Service;
 7 import android.content.ComponentName;
 8 import android.content.Intent;
 9 import android.content.ServiceConnection;
10 import android.os.Bundle;
11 import android.os.IBinder;
12 import android.view.Menu;
13 import android.view.MenuItem;
14 import android.view.View;
15 import android.view.View.OnClickListener;
16 import android.widget.Button;
17 import android.widget.Toast;
18
19 public class MainActivity extends Activity implements OnClickListener {
20     private ServiceConnection sc;
21     private MyAppService mMyAppService;
22
23     @Override
24     protected void onCreate(Bundle savedInstanceState) {
25         super.onCreate(savedInstanceState);
26         setContentView(R.layout.activity_main);
27
28         Button btn1 = (Button) findViewById(R.id.button1);
29         Button btn2 = (Button) findViewById(R.id.button2);
30         Button btn3 = (Button) findViewById(R.id.button3);
31
32         btn1.setOnClickListener(this);
33         btn2.setOnClickListener(this);
34         btn3.setOnClickListener(this);
35         // 建立service连接
36         sc = new ServiceConnection() {
37
38             @Override
39             public void onServiceDisconnected(ComponentName name) {
40
41             }
42
43             @Override
44             public void onServiceConnected(ComponentName name, IBinder service) {
45                 Mybind mMybind = (Mybind) service;
46                 mMyAppService = mMybind.getService();// 获取MyAppService的对象
47             }
48         };
49     }
50
51     @Override
52     public void onClick(View v) {
53         switch (v.getId()) {
54         case R.id.button1:
55             startService();
56             break;
57         case R.id.button2:
58             bindService();
59             break;
60         case R.id.button3:
61             String str = mMyAppService.getServiceValue();
62             Toast.makeText(this, str, 0).show();
63             break;
64         default:
65             break;
66         }
67
68     }
69
70     public void startService() {
71         mMyAppService.setServiceValue("你是：");// 设置MyAppService里面的公共变量的值
72         Intent intent = new Intent(this, MyAppService.class);
73         startService(intent);
74     }
75
76     public void bindService() {
77         Intent it = new Intent(this, MyAppService.class);
78         bindService(it, sc, Service.BIND_AUTO_CREATE);// 建立service的bind连接
79     }
80
81     @Override
82     protected void onDestroy() {
83         super.onDestroy();
84         Intent it = new Intent(this, MyAppService.class);
85         stopService(it);// 关闭服务
86     }
87
88 }

 1 package com.lixu.jiaohu;
 2
 3 import android.app.Service;
 4 import android.content.Intent;
 5 import android.os.Binder;
 6 import android.os.IBinder;
 7 import android.util.Log;
 8
 9 public class MyAppService extends Service {
10     private String str;
11
12     @Override
13     public void onCreate() {
14         Log.e("MyAppService", "onCreate开始了");
15         super.onCreate();
16     }
17
18     @Override
19     public int onStartCommand(Intent intent, int flags, int startId) {
20         str = str + "宝儿";
21         return super.onStartCommand(intent, flags, startId);
22     }
23
24     // Activity bindService()方法开启后进入执行onBind方法
25     @Override
26     public IBinder onBind(Intent intent) {
27
28         return new Mybind();
29     }
30
31     public String getServiceValue() {
32         return str;
33     }
34
35     public void setServiceValue(String str) {
36         this.str = str;
37     }
38
39     public class Mybind extends Binder {
40         public MyAppService getService() {
41             return MyAppService.this;
42
43         }
44     }
45
46     @Override
47     public boolean onUnbind(Intent intent) {
48         // TODO Auto-generated method stub
49         return super.onUnbind(intent);
50     }
51
52 }