CellTracker.java 文件源码

/**
 *  Description:  TODO: add more info
 *
 *  Issues:
 *
 *      [ ]     Getting and comparing signal strengths between different RATs can be very
 *              tricky, since they all return different ranges of values. AOS doesn't
 *              specify very clearly what exactly is returned, even though people have
 *              a good idea, by trial and error.
 *
 *              See note in : SignalStrengthTracker.java
 */
public void onSignalStrengthsChanged(SignalStrength signalStrength) {
    // Update Signal Strength
    if (signalStrength.isGsm()) {
        int dbm;
        if (signalStrength.getGsmSignalStrength() <= 2 ||
                signalStrength.getGsmSignalStrength() == NeighboringCellInfo.UNKNOWN_RSSI) {
            // Unknown signal strength, get it another way
            String[] bits = signalStrength.toString().split(" ");
            dbm = Integer.parseInt(bits[9]);
        } else {
            dbm = signalStrength.getGsmSignalStrength();
        }
        device.setSignalDbm(dbm);
    } else {
        int evdoDbm = signalStrength.getEvdoDbm();
        int cdmaDbm = signalStrength.getCdmaDbm();

        // Use lowest signal to be conservative
        device.setSignalDbm((cdmaDbm < evdoDbm) ? cdmaDbm : evdoDbm);
    }
    // Send it to signal tracker
    signalStrengthTracker.registerSignalStrength(device.cell.getCellId(), device.getSignalDBm());
    //signalStrengthTracker.isMysterious(device.cell.getCid(), device.getSignalDBm());
}