4.15 Service笔记

intent=new Intent();
intent.setClass(MainActivity.this, MyService.class);
startService(intent); // Context.startService(intent);

// 在启用Service的组件的onDestroy()方法中停止服务
//stopService(intent);

@Override
protected void onDestroy() {
    super.onDestroy();
    stopService(intent);
}
// 或
@Override
protected void onBackPressed() {
    super.onBackPressed();
    stopService(intent);
}

intent=new Intent(MainActivity.this,MyServiceBinder.class);
bindService(intent, conn, Context.BIND_AUTO_CREATE); // Context.bindService(...);

unbindService(conn); 

 1 package com.anjoyo.startservice;
 2 
 3 import com.anjoyo.startservice.MyServiceBinder.MyBinder;
 4 
 5 import android.os.Bundle;
 6 import android.os.IBinder;
 7 import android.app.Activity;
 8 import android.content.ComponentName;
 9 import android.content.Context;
10 import android.content.Intent;
11 import android.content.ServiceConnection;
12 import android.view.View;
13 import android.view.View.OnClickListener;
14 
15 public class MainActivity extends Activity {
16 
17     private Intent intent;
18     MyBinder binder;
19     ServiceConnection conn= new ServiceConnection(){
20 
21         public void onServiceConnected(ComponentName name, IBinder service) {
22             //当服务
23             System.out.println("onServiceConnected()====>"+name.getPackageName()+name.getClassName());
24             binder=(MyBinder)service;
25             System.out.println(binder.getServiceName());
26         }
27 
28         public void onServiceDisconnected(ComponentName name) {
29             
30         }};
31     public void onCreate(Bundle savedInstanceState) {
32         super.onCreate(savedInstanceState);
33         setContentView(R.layout.activity_main);
34         
35         this.findViewById(R.id.tv_startservice).setOnClickListener(new OnClickListener() {
36             
37             public void onClick(View v) {
38                 /*
39                 //1.使用startService启动服务
40                 intent=new Intent();
41                 intent.setClass(MainActivity.this, MyService.class);
42                 //当服务第一次创建的时候才会执行onCreate(),以后在启动时不会执行
43                 //只要服务不销毁就会一直存在
44                 startService(intent);
45                 */
46                 //2.使用bindService()使用服务
47                 //onCreate(),onBind()
48                 intent=new Intent(MainActivity.this,MyServiceBinder.class);
49                 bindService(intent, conn, Context.BIND_AUTO_CREATE);
50             }
51         });
52     }
53     
54     //停止服务
55     @Override
56     protected void onDestroy() {
57         super.onDestroy();
58         stopService(intent);
59         //调用者销毁,服务立即销毁,它的生命周期和调用者绑定在一起,
60         //如果调用者销毁,必须手动解绑, 每一次运行程序, 服务都会重新开始
61         unbindService(conn);
62     }
63     
64 }

 1 package com.anjoyo.startservice;
 2 
 3 import android.app.Service;
 4 import android.content.Intent;
 5 import android.os.IBinder;
 6 
 7 public class MyService extends Service {
 8 
 9     public void onCreate() {
10         System.out.println("onCreate");
11         super.onCreate();
12     }
13     
14     @Override
15     @Deprecated
16     public void onStart(Intent intent, int startId) {
17         System.out.println("onStart");
18         super.onStart(intent, startId);
19     }
20     
21     @Override
22     public int onStartCommand(Intent intent, int flags, int startId) {
23         long sum=0;
24         for (int i = 0; i < 10000001; i++) {
25             sum+=i;
26             System.out.println(sum);
27         }
28         System.out.println("onStartCommand");
29         return super.onStartCommand(intent, flags, startId);
30     }
31     
32     @Override
33     public void onDestroy() {
34         System.out.println("onDestroy");
35         super.onDestroy();
36     }
37     
38     public IBinder onBind(Intent intent) {
39         System.out.println("onBind");
40         return null;
41     }
42     
43 }

 1 package com.anjoyo.startservice;
 2 
 3 import android.app.Service;
 4 import android.content.Intent;
 5 import android.os.Binder;
 6 import android.os.IBinder;
 7 
 8 public class MyServiceBinder extends Service {
 9 
10     @Override
11     public void onCreate() {
12         System.out.println("MyServiceBind.onCreate()");
13         super.onCreate();
14     }
15     
16     class MyBinder extends Binder{
17         public MyServiceBinder getServiceName(){
18             return MyServiceBinder.this;
19         }
20     }
21     
22     public IBinder onBind(Intent intent) {
23 //        long sum=0;
24 //        for (int i = 0; i < 1000000; i++) {
25 //            sum+=i;
26 //            System.out.println(sum);
27 //        }
28         System.out.println("MyServiceBind.onBind()");
29         return new MyBinder();
30     }
31 
32     @Override
33     public boolean onUnbind(Intent intent) {
34         System.out.println("MyServiceBind.onUnbind()");
35         return super.onUnbind(intent);
36     }
37     
38     @Override
39     public void onDestroy() {
40         System.out.println("MyServiceBind.onDestroy()");
41         super.onDestroy();
42     }
43 }