Android判断服务是否开启，activity是否在前台运行

import android.app.ActivityManager;
import android.content.ComponentName;
import android.content.Context;
import android.text.TextUtils;
import java.util.ArrayList;
import java.util.List;

public class ServiceUtils {

    /**
     * 判断服务是否已经正在运行
     * @param mContext   上下文对象
     * @param className  Service类的全路径类名 "包名+类名" 如com.demo.test.MyService
     * @return
     */
    public static boolean isServiceRunning(Context mContext, String className) {
        ActivityManager myManager = (ActivityManager) mContext
                .getApplicationContext().getSystemService(
                        Context.ACTIVITY_SERVICE);
        ArrayList<ActivityManager.RunningServiceInfo> runningService = (ArrayList<ActivityManager.RunningServiceInfo>) myManager
                .getRunningServices(30);
        for (int i = 0; i < runningService.size(); i++) {
            if (runningService.get(i).service.getClassName().toString()
                    .equals(className)) {
                return true;
            }
        }
        return false;
    }


    /**
     * 判断某个界面是否在前台
     *
     * @param context
     * @param className   某个界面名称
     *            
     */
    public static boolean isActivityForeground(Context context, String className) {
        if (context == null || TextUtils.isEmpty(className)) {
            return false;
        }

        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(1);
        if (list != null && list.size() > 0) {
            ComponentName cpn = list.get(0).topActivity;
            if (className.equals(cpn.getClassName())) {
                return true;
            }
        }

        return false;
    }

}