android 检查service 是否还存在

http://cncoke.iteye.com/blog/1812481

private boolean isServiceRunning() {  
    ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);  
    for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {  
        if ("com.baixun.os".equals(service.service.getClassName())) {  
            return true;  
        }  
    }  
    return false;  
}