判断android app或者service是否存在

ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);

List<RunningTaskInfo> list = am.getRunningTasks(100);

for (RunningTaskInfo info : list) {

if (info.topActivity.getPackageName().equals(MY_PKG_NAME) &&

info.baseActivity.getPackageName().equals(MY_PKG_NAME))

{ isAppRunning = true; //find it, break break;

}

}

ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);

List<RunningServiceInfo> infos = am.getRunningServices(30); //30是最大值

for(RunningServiceInfo info : infos){

    if(info.service.getClassName().equals("Service的全名")){

        //...

    }

}