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我正在檢查CDMA設備的信號強度。任何人都可以指定範圍signalStrength.getCdmaDbm()
返回?最低值是-120,但對於全信號強度,該值是多少?我得到的最高是-52。CDMA設備的dbm信號強度範圍
我正在檢查CDMA設備的信號強度。任何人都可以指定範圍signalStrength.getCdmaDbm()
返回?最低值是-120,但對於全信號強度,該值是多少?我得到的最高是-52。CDMA設備的dbm信號強度範圍
嗯,我不確定這是你在找什麼,但看了一下SignalStrength.java文件在android源代碼後,我注意到一些代碼有一堆cdma dbm和ecio級別的代碼。
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
和水平是最低的兩個
actualLevel = (levelDbm < levelEcio) ? levelDbm : levelEcio;
但我注意到,這並不關聯於該通知中顯示的實際吧。如果在3G中,則忽略該等級並使用信噪比。
signalStrength.getEvdoSnr() // value is 0 to 8 so divide by two to get the bars
如果數據從3G下降到1x,則使用actualLevel。
這是我的代碼來查找顯示酒吧的數量。
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);
}
}
在創建方法中使用下面的方法,並確保清單使用READ_PHONE_STATE。
TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
AndroidPhoneStateListener phoneStateListener = new AndroidPhoneStateListener(text);
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS);
如果手機是GSM,該怎麼辦?變量「signalStrengthValue」是dBm值。如何計算ECIO值? – MCGBra 2015-07-10 06:41:17