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| == Overview ==
| | {{Migrating|https://smartpossdk.gitbook.io/cloudpossdk/faq/other-development/obtain-signal-strength}} |
| This guide demonstrates how to use the ''''PhoneStateListener'''' class in Android to monitor and retrieve the signal strength of a mobile device. This is particularly useful for applications that need to track network quality or adjust functionalities based on signal strength.
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| == Code Snippet ==
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| <syntaxhighlight lang="java">
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| public TelephonyManager telephoneManager;
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| public PhoneStateListener phoneStateListener;
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| public void listenerSignal(Context context) {
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| telephoneManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
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| telephoneManager.listen(phoneStateListener,
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| phoneStateListener = new PhoneStateListener() {
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| @Override
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| public void onServiceStateChanged(ServiceState serviceState) {
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| Logger.debug("onServiceStateChanged++++");
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| super.onServiceStateChanged(serviceState);
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| int voiceRegState = serviceState.getVoiceRegState();
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| int dataRegState = serviceState.getDataRegState();
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| }
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| @Override
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| public void onSignalStrengthsChanged(SignalStrength signalStrength) {
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| Logger.debug("onSignalStrengthsChanged++++");
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| super.onSignalStrengthsChanged(signalStrength);
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| int level = signalStrength.getLevel();//Call requires API level 23
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| int asu = getMethod(signalStrength, "getAsuLevel");//Hide
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| int dbm = getMethod(signalStrength, "getDbm");//Hide
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| }
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| };
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| telephoneManager.listen(phoneStateListener,
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| PhoneStateListener.LISTEN_SERVICE_STATE
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| | PhoneStateListener.LISTEN_SIGNAL_STRENGTHS
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| | PhoneStateListener.LISTEN_CALL_STATE
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| | PhoneStateListener.LISTEN_DATA_CONNECTION_STATE
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| | PhoneStateListener.LISTEN_DATA_ACTIVITY);
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| }
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| int getMethod(SignalStrength signalStrength, String name) {
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| Class<?> clazz = signalStrength.getClass();
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| Method method = null;
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| int i = 0;
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| try {
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| method = clazz.getMethod(name);//getDbm
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| Object result = method.invoke(signalStrength);
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| i = Integer.parseInt(String.valueOf(result));
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| } catch (Exception e) {
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| e.printStackTrace();
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| }
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| return i;
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| }
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| </syntaxhighlight >
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