How to get cell service signal strength in Android?

user_234933 0
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I am trying to write a very simple Android application that checks the signal strength of the current cell. So far, I have only found something called getNeighboringCellInfo(), but I'm not really sure if that includes the current cell.

How do I get the CURRENT cell signal strength in Android?

Does getNeighborCellInfo() get the current cell? It doesn't seem like it based on the results that I have been able to get with it. Here's my current code:

List<NeighboringCellInfo> n = tm.getNeighboringCellInfo();

//Construct the string
String s = "";
int rss = 0;
int cid = 0;
for (NeighboringCellInfo nci : n)
{
    cid = nci.getCid();
    rss = -113 + 2*nci.getRssi();
    s += "Cell ID: " + Integer.toString(cid) + "     Signal Power (dBm): " + 
            Integer.toString(rss) + "\n";
}

mainText.setText(s);
rssi signals android
3 Answers

create a PhoneStateListener and handle the onSignalStrengthChanged callback. When your app is initialized, it should give you an initial notification. This is in 1.x. in 2.x, there's an open issue about this.

user_2353540

enter image description hereBelow code will create effect like picture (Android system Cell Info)

Inside your running activity/fragment, create a sub class like this

TextView txtSignalMobile1 = findViewById...;
    class myPhoneStateListener extends PhoneStateListener {
        public int signalStrengthValue;
        public int signalLevel;

        @RequiresApi(api = Build.VERSION_CODES.Q)
        public void onSignalStrengthsChanged(SignalStrength signalStrength) {
            super.onSignalStrengthsChanged(signalStrength);
            if (signalStrength.isGsm()) {
                if (signalStrength.getGsmSignalStrength() != 99)
                    signalStrengthValue = signalStrength.getGsmSignalStrength() * 2 - 113;
                else{
                    signalStrengthValue = signalStrength.getCellSignalStrengths().get(0).getDbm();
                    signalLevel =signalStrength.getCellSignalStrengths().get(0).getAsuLevel();
                }


            } else {
                signalStrengthValue = signalStrength.getCdmaDbm();
            }
            txtSignalMobile1.setText(signalStrengthValue + "dbm, " + signalLevel + "asu");
        }
    }

Call somewhere else maybe onCreate or after a button... (used thread to update continnously value changed)

Thread splashThread2 = new Thread() {
            @Override
            public void run() {
                try {
                    while (!isInterrupted()) {
                        Thread.sleep(1000);

                        requireActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                // update TextView here!
                                int signal2 = NetworkUtils.GetWifiSignal(requireContext());
                                txtSignalWifi.setText(signal2 + "/100");
                            }
                        });
                    }
                } catch (Exception ignore) {
                    // when user exit suddenly
                }
            }
        };
        splashThread2.start();
user_162617240
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