绑定本地Service并与之通信

绑定Service需要调用

public boolean bindService (Intent service, ServiceConnection conn, int flags)；

传入一个ServiceConnection 对象，该对象是一个接口，实例化时需要实现该接口，它的作用就是获得Service的IBinder对象，通过IBinder对象可以实现与Service的通信。

Service的的代码：

 1 package com.example.servicetest;
 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 BindServiceTest extends Service {
10     private int count = 0;
11     private boolean quit = false;
12     private MyBinder mBinder = new MyBinder();
13 
14     public class MyBinder extends Binder {
15         public int count() {
16             return count;
17         }
18     }
19 
20     @Override
21     public IBinder onBind(Intent arg0) {
22         Log.i("csx", "onBind");
23         return mBinder;
24     }
25 
26     @Override
27     public void onCreate() {
28 
29         super.onCreate();
30         Log.i("csx", "onCreate");
31         new Thread() {
32 
33             @Override
34             public void run() {
35                 while (!quit) {
36                     try {
37                         Thread.sleep(1000);
38                     } catch (InterruptedException e) {
39 
40                         e.printStackTrace();
41                     }
42                     count++;
43 
44                 }
45 
46             }
47 
48         }.start();
49     }
50 
51     @Override
52     public int onStartCommand(Intent intent, int flags, int startId) {
53         Log.i("csx", "onStartCommand");
54         return START_STICKY;
55     }
56 
57     @Override
58     public boolean onUnbind(Intent intent) {
59         Log.i("csx", "onUnbind");
60         return true;
61     }
62 
63     @Override
64     public void onDestroy() {
65         super.onDestroy();
66         this.quit = true;
67         Log.i("csx", "onDestroy");
68     }
69 
70 }

组件的代码：

 1 package com.example.servicetest;
 2 
 3 import com.example.servicetest.BindServiceTest.MyBinder;
 4 
 5 import android.content.ComponentName;
 6 import android.content.Intent;
 7 import android.content.ServiceConnection;
 8 import android.os.Bundle;
 9 import android.os.IBinder;
10 import android.support.v7.app.ActionBarActivity;
11 import android.util.Log;
12 import android.view.View;
13 import android.view.View.OnClickListener;
14 import android.widget.Button;
15 import android.widget.Toast;
16 
17 public class MainActivity extends ActionBarActivity {
18     public static final String SERVICE_ACTION = "com.example.servicetest.BindServiceTest";
19     Button bindButton, unbindButton, stateButton;
20     ServiceConnection conn;
21     BindServiceTest.MyBinder mBinder;
22     boolean isBind = false;
23 
24     @Override
25     protected void onCreate(Bundle savedInstanceState) {
26         super.onCreate(savedInstanceState);
27         setContentView(R.layout.activity_main);
28         bindButton = (Button) findViewById(R.id.button_bind);
29         unbindButton = (Button) findViewById(R.id.button_unbind);
30         stateButton = (Button) findViewById(R.id.button_get_state);
31 
32         conn = new ServiceConnection() {
33 
34             @Override
35             public void onServiceConnected(ComponentName name, IBinder service) {
36                 Log.i("csx", "onServiceConnected");
37                 mBinder = (MyBinder) service; // 连接service之后将service中实现的Binder返回给本地声明的Binder
38 
39             }
40 
41             @Override
42             public void onServiceDisconnected(ComponentName name) {
43                 Log.i("csx", "onServiceDisconnected");// 意外断开连接会调用该函数
44 
45             }
46 
47         };
48 
49         bindButton.setOnClickListener(new OnClickListener() {
50 
51             @Override
52             public void onClick(View v) {
53                 Intent service = new Intent();
54                 service.setAction(SERVICE_ACTION);
55                 bindService(service, conn, BIND_AUTO_CREATE);// 绑定服务
56                 isBind = true;
57 
58             }
59         });
60 
61         unbindButton.setOnClickListener(new OnClickListener() {
62 
63             @Override
64             public void onClick(View v) {
65                 if (!isBind) {
66                     Toast.makeText(MainActivity.this, "请先绑定服务", Toast.LENGTH_SHORT).show();
67                     return;
68 
69                 }
70 
71                 unbindService(conn);// 解除绑定服务
72                 isBind = false;
73 
74             }
75         });
76 
77         stateButton.setOnClickListener(new OnClickListener() {
78 
79             @Override
80             public void onClick(View v) {
81                 if (!isBind) {
82                     Toast.makeText(MainActivity.this, "请先绑定服务", Toast.LENGTH_SHORT).show();
83                     return;
84 
85                 }
86                 Toast.makeText(MainActivity.this, "" + mBinder.count(), Toast.LENGTH_SHORT).show();// 通过mBinder获取service内部的数据
87 
88             }
89         });
90 
91     }
92 }