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androidsignal-strength

How is telephony signal strength updated to UI in android

i went though the following post to get the signal strength in android:

How to get cell service signal strength in Android?

my ques is that: how does the signal strength gets updated to the system UI. what does each bar in the strength meter signify? is there a particular threshold value for each bar?

Solution

  • The getGsmLevel() function in SignalStrength.java does the trick here:

    int level;
int asu = getGsmSignalStrength();
if (asu <= 2 || asu == 99) level = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
else if (asu >= 12) level = SIGNAL_STRENGTH_GREAT;
else if (asu >= 8)  level = SIGNAL_STRENGTH_GOOD;
else if (asu >= 5)  level = SIGNAL_STRENGTH_MODERATE;
else level = SIGNAL_STRENGTH_POOR;

    this function returns the level