手机上安装的App，在后台运行着很多不同功能的服务，最常见的例如消息推送相关的服务。如何查看这些服务？如何判断某个服务是否正在运行？如何停止某一个服务呢？请看下面的方法：

package com.example.servicelistdemo;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.app.Activity;import android.app.ActivityManager;import android.app.ActivityManager.RunningServiceInfo;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.ListView;public class MainActivity extends Activity {
        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView lv = (ListView) findViewById(R.id.lvService);        List
    
      serviceList = new ArrayList
     
      ();        //获取服务列表        ActivityManager activityManager = (ActivityManager) this.getSystemService(Context.ACTIVITY_SERVICE);        List
      
        runningServicesList = activityManager.getRunningServices(Integer.MAX_VALUE);        for(RunningServiceInfo si: runningServicesList){            serviceList.add(si.service.getClassName());        }        ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, serviceList);        lv.setAdapter(adapter);        adapter.notifyDataSetChanged();    }    /**     * 用来判断服务是否运行.     *     * @param ctx       Context     * @param className 判断的服务的名字 "com.xxx.xx..XXXService"     * @return true 在运行, false 不在运行     */    public static boolean isServiceRunning(Context ctx, String className) {        boolean isRunning = false;        ActivityManager manager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);        List
       
         servicesList = manager.getRunningServices(Integer.MAX_VALUE);        Iterator
        
          iterator = servicesList.iterator();        while (iterator.hasNext()) {            RunningServiceInfo service = (RunningServiceInfo) iterator.next();            if (className.equals(service.service.getClassName())) {                isRunning = true;            }        }        return isRunning;    }    /**     * 停止服务.     *     * @param ctx       Context     * @param className 服务的名字      * @return true 在运行, false 不在运行     */    public static boolean stopRunningService(Context ctx, String className) {        Intent intent_service = null;        boolean ret = false;        try {            intent_service = new Intent(ctx, Class.forName(className));        } catch (Exception e) {            e.printStackTrace();        }        if (intent_service != null) {            ret = ctx.stopService(intent_service);        }        return ret;    }}
        
       
      
     
    

代码很好理解，就不详细分析了，运行效果图如下：