android 判断service是否开启

package com.tutor.runningservice; import java.util.List; import android.app.Activity; import android.app.ActivityManager; import android.os.Bundle; import android.widget.TextView; public class RunningService extends Activity {/** Called when the activity is first created. */@Override public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//setContentView(R.layout.main); TextView mTextView = new TextView(this);ActivityManager mActivityManager = (ActivityManager)getSystemService(ACTIVITY_SERVICE); List<ActivityManager.RunningServiceInfo> mServiceList = mActivityManager.getRunningServices(30);//我要判断的服务名字，我在launcher2里加了一个音乐服务 final String musicClassName = "com.android.launcher2.MusicService"; boolean b = MusicServiceIsStart(mServiceList, musicClassName); mTextView.setText("你要判断的服务状态为: " +b+"\n" + getServiceClassName(mServiceList));setContentView(mTextView);}//通过Service的类名来判断是否启动某个服务 private boolean MusicServiceIsStart(List<ActivityManager.RunningServiceInfo> mServiceList,String className){ for(int i = 0; i < mServiceList.size(); i ++){ if(className.equals(mServiceList.get(i).service.getClassName())){ return true; }}return false;}//获取所有启动的服务的类名 private String getServiceClassName(List<ActivityManager.RunningServiceInfo> mServiceList){ String res = "";for(int i = 0; i < mServiceList.size(); i ++){res+=mServiceList.get(i).service.getClassName()+ " \n"; } return res;} }
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