1 ackage com.example.zhangmeng.servicedemo; 2  3 import android.content.Intent; 4 import android.support.v7.app.AppCompatActivity; 5 import android.os.Bundle; 6 import android.view.View; 7  8 public class MainActivity extends AppCompatActivity { 9     private Intent intent;10 11     @Override12     protected void onCreate(Bundle savedInstanceState) {13         intent=new Intent(MainActivity.this,MyService.class);14         super.onCreate(savedInstanceState);15         setContentView(R.layout.activity_main);16 17         findViewById(R.id.button_StartService).setOnClickListener(new View.OnClickListener() {18             @Override19             public void onClick(View v) {20                 startService(intent);21 22             }23         });24 25         findViewById(R.id.button_StopService).setOnClickListener(new View.OnClickListener() {26             @Override27             public void onClick(View v) {28                 stopService(intent);29             }30         });31 32 33     }34 }

 1 package com.example.zhangmeng.servicedemo; 2  3 import android.app.Service; 4 import android.content.Intent; 5 import android.os.IBinder; 6 import android.provider.Settings; 7  8 public class MyService extends Service { 9     public MyService() {10     }11 12     @Override13     public IBinder onBind(Intent intent) {14         // TODO: Return the communication channel to the service.15         throw new UnsupportedOperationException("Not yet implemented");16     }17 18     @Override19     public int onStartCommand(Intent intent, int flags, int startId) {20        new Thread(){21            @Override22            public void run() {23                super.run();24                while (true)25                {26                    System.out.println("The service is running!");27                    try {28                        sleep(1000);29                    } catch (InterruptedException e) {30                        e.printStackTrace();31                    }32                }33            }34        }.start();35         return super.onStartCommand(intent, flags, startId);36     }37 }

 1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     xmlns:tools="http://schemas.android.com/tools" 4     android:layout_width="match_parent" 5     android:layout_height="match_parent" 6     android:paddingBottom="@dimen/activity_vertical_margin" 7     android:paddingLeft="@dimen/activity_horizontal_margin" 8     android:paddingRight="@dimen/activity_horizontal_margin" 9     android:paddingTop="@dimen/activity_vertical_margin"10     android:orientation="vertical"11     tools:context="com.example.zhangmeng.servicedemo.MainActivity">12 13 14     <Button15         android:layout_width="wrap_content"16         android:layout_height="wrap_content"17         android:text="启动服务"18         android:id="@+id/button_StartService" />19 20     <Button21         android:layout_width="wrap_content"22         android:layout_height="wrap_content"23         android:text="停止服务"24         android:id="@+id/button_StopService" />25 26 </LinearLayout>