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Commit 2552c8c4 authored by dhacker29's avatar dhacker29 Committed by Gerrit Code Review
Browse files

Framework: Fix GSM signal strength 



Certain OEM gsm ril libs send back a bogus value for LTE signal
that causes SignalStrength.java to default to LTE and report
incorrect signal values.
Use prop value ro.telephony.ril.v3=signalstrength to get proper
GSM signal reading on certain devices.

Change-Id: Ibb23d7b3a2d21001ccbbc6ebfbdc3c5248f18cfc
Signed-off-by: default avatardhacker29 <davidhackerdvm@gmail.com>
parent 95a2ec80

telephony/java/android/telephony/SignalStrength.java

+16 −3
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ package android.telephony; 
import android.os.Bundle;

import android.os.Parcel;

import android.os.Parcelable;

import android.os.SystemProperties;

import android.util.Log;



/**
@@ -435,6 +436,15 @@ public class SignalStrength implements Parcelable { 
        return mLteCqi;

    }



    public boolean needsOldRilFeature(String feature) {

        String[] features = SystemProperties.get("ro.telephony.ril.v3", "").split(",");

        for (String found: features) {

            if (found.equals(feature))

                return true;

        }

        return false;

    }



    /**

     * Get signal level as an int from 0..4

     *
@@ -444,8 +454,9 @@ public class SignalStrength implements Parcelable { 
        int level;



        if (isGsm) {

            boolean oldRil = needsOldRilFeature("signalstrength");

            level = getLteLevel();

            if (level == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {

            if (level == SIGNAL_STRENGTH_NONE_OR_UNKNOWN || oldRil) {

                level = getGsmLevel();

            }

        } else {
@@ -474,7 +485,8 @@ public class SignalStrength implements Parcelable { 
    public int getAsuLevel() {

        int asuLevel;

        if (isGsm) {

            if (getLteLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {

            boolean oldRil = needsOldRilFeature("signalstrength");

            if (getLteLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN || oldRil) {

                asuLevel = getGsmAsuLevel();

            } else {

                asuLevel = getLteAsuLevel();
@@ -506,7 +518,8 @@ public class SignalStrength implements Parcelable { 
        int dBm;



        if(isGsm()) {

            if (getLteLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {

            boolean oldRil = needsOldRilFeature("signalstrength");

            if (getLteLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN || oldRil) {

                dBm = getGsmDbm();

            } else {

                dBm = getLteDbm();