SignalListener.java 文件源码

@Override
public void onSignalStrengthsChanged(SignalStrength signalStrength) {
    super.onSignalStrengthsChanged(signalStrength);

    int percent = 0;
    if(signalStrength != null && signalStrength.getGsmSignalStrength() != UNKNOWN_CODE) {
        percent = calculateSignalStrengthInPercent(signalStrength.getGsmSignalStrength());
    } else {
        Log.e(TAG, "Unable to get phone signal strength!");
    }

    onPercentKnown(percent);
}