CDMA设备的dbm信号强度范围

我正在检查CDMA设备的信号强度。 任何人都可以指定范围signalStrength.getCdmaDbm()返回? 最低的是-120,但是对于完整的信号强度,这个值是多less? 我得到的最高是-52。

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那么我不知道这是你在找什么,但看看在Android源SignalStrength.java文件后,我注意到了一些代码,有一堆cdma dbm和ecio级别的级别。

 DBM level 4 >= -75 level 3 >= -85 level 2 >= -95 level 1 >= -100 Ecio level 4 >= -90 level 3 >= -110 level 2 >= -130 level 1 >= -150 

而水平是两者中最低的

 actualLevel = (levelDbm < levelEcio) ? levelDbm : levelEcio; 

但我注意到这与通知中显示的实际栏不相关。 如果在3G中,那么这个级别被忽略,并使用信噪比。

 signalStrength.getEvdoSnr() // value is 0 to 8 so divide by two to get the bars 

如果数据从3G下降到1x,则使用actualLevel。

这是我的代码来查找显示酒吧的数量。

  public void onSignalStrengthsChanged(SignalStrength signalStrength) { super.onSignalStrengthsChanged(signalStrength); if (signalStrength.isGsm()) { if (signalStrength.getGsmSignalStrength() != 99) signalStrengthValue = signalStrength.getGsmSignalStrength() * 2 - 113; else signalStrengthValue = signalStrength.getGsmSignalStrength(); } else { final int snr = signalStrength.getEvdoSnr(); final int cdmaDbm = signalStrength.getCdmaDbm(); final int cdmaEcio = signalStrength.getCdmaEcio(); int levelDbm; int levelEcio; int level = 0; if (snr == -1) { if (cdmaDbm >= -75) levelDbm = 4; else if (cdmaDbm >= -85) levelDbm = 3; else if (cdmaDbm >= -95) levelDbm = 2; else if (cdmaDbm >= -100) levelDbm = 1; else levelDbm = 0; // Ec/Io are in dB*10 if (cdmaEcio >= -90) levelEcio = 4; else if (cdmaEcio >= -110) levelEcio = 3; else if (cdmaEcio >= -130) levelEcio = 2; else if (cdmaEcio >= -150) levelEcio = 1; else levelEcio = 0; level = (levelDbm < levelEcio) ? levelDbm : levelEcio; } else { if (snr == 7 || snr == 8) level =4; else if (snr == 5 || snr == 6 ) level =3; else if (snr == 3 || snr == 4) level = 2; else if (snr ==1 || snr ==2) level =1; } text.setText("Bars= " + level); } } 

在创build方法使用下面,并确保清单使用READ_PHONE_STATE。

  TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE); AndroidPhoneStateListener phoneStateListener = new AndroidPhoneStateListener(text); telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);