PlatformNetworksManager.java 文件源码

@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private static VisibleCell getVisibleCellPostJellyBeanMr1(
        @Nullable CellInfo cellInfo, long elapsedTime, long currentTime) {
    if (cellInfo == null) {
        return VisibleCell.UNKNOWN_VISIBLE_CELL;
    }
    long cellInfoAge = elapsedTime - TimeUnit.NANOSECONDS.toMillis(cellInfo.getTimeStamp());
    long cellTimestamp = currentTime - cellInfoAge;
    if (cellInfo instanceof CellInfoCdma) {
        CellIdentityCdma cellIdentityCdma = ((CellInfoCdma) cellInfo).getCellIdentity();
        return VisibleCell.builder(VisibleCell.CDMA_RADIO_TYPE)
                .setCellId(cellIdentityCdma.getBasestationId())
                .setLocationAreaCode(cellIdentityCdma.getNetworkId())
                .setMobileNetworkCode(cellIdentityCdma.getSystemId())
                .setTimestamp(cellTimestamp)
                .build();
    }
    if (cellInfo instanceof CellInfoGsm) {
        CellIdentityGsm cellIdentityGsm = ((CellInfoGsm) cellInfo).getCellIdentity();
        return VisibleCell.builder(VisibleCell.GSM_RADIO_TYPE)
                .setCellId(cellIdentityGsm.getCid())
                .setLocationAreaCode(cellIdentityGsm.getLac())
                .setMobileCountryCode(cellIdentityGsm.getMcc())
                .setMobileNetworkCode(cellIdentityGsm.getMnc())
                .setTimestamp(cellTimestamp)
                .build();
    }
    if (cellInfo instanceof CellInfoLte) {
        CellIdentityLte cellIdLte = ((CellInfoLte) cellInfo).getCellIdentity();
        return VisibleCell.builder(VisibleCell.LTE_RADIO_TYPE)
                .setCellId(cellIdLte.getCi())
                .setMobileCountryCode(cellIdLte.getMcc())
                .setMobileNetworkCode(cellIdLte.getMnc())
                .setPhysicalCellId(cellIdLte.getPci())
                .setTrackingAreaCode(cellIdLte.getTac())
                .setTimestamp(cellTimestamp)
                .build();
    }
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2
            && cellInfo instanceof CellInfoWcdma) {
        // CellInfoWcdma is only usable JB MR2 upwards.
        CellIdentityWcdma cellIdentityWcdma = ((CellInfoWcdma) cellInfo).getCellIdentity();
        return VisibleCell.builder(VisibleCell.WCDMA_RADIO_TYPE)
                .setCellId(cellIdentityWcdma.getCid())
                .setLocationAreaCode(cellIdentityWcdma.getLac())
                .setMobileCountryCode(cellIdentityWcdma.getMcc())
                .setMobileNetworkCode(cellIdentityWcdma.getMnc())
                .setPrimaryScramblingCode(cellIdentityWcdma.getPsc())
                .setTimestamp(cellTimestamp)
                .build();
    }
    return VisibleCell.UNKNOWN_VISIBLE_CELL;
}