android 判断是否有sim卡及运营商

判断是否有sim卡的方法：

int absent = TelephonyManager.SIM_STATE_ABSENT;
        if (1 == absent)
        {
         Log.d(TAG,"请确认sim卡是否插入或者sim卡暂时不可用！");
        }
        

判断是哪个运营商的

  TelephonyManager telManager = (TelephonyManager) getSystemService(Activity.TELEPHONY_SERVICE);
        String operator = telManager.getSimOperator();
        Log.d(TAG,"operator："+operator);
        if(operator!=null)
        {
         if(operator.equals("46000") || operator.equals("46002"))
         {
          Log.d(TAG,"中国移动");
         }else if(operator.equals("46001")){
          Log.d(TAG,"中国联通");
         }else if(operator.equals("46003")){
          Log.d(TAG,"中国电信");
         }
        }