How to use

getDbm

method

in

android.telephony.CellSignalStrengthLte

TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
List<CellInfo> cellInfos = telephonyManager.getAllCellInfo();   //This will give info of all sims present inside your mobile 
if(cellInfos!=null){
  for (int i = 0 ; i<cellInfos.size(); i++){
     if (cellInfos.get(i).isRegistered()){
       if(cellInfos.get(i) instanceof CellInfoWcdma){
         CellInfoWcdma cellInfoWcdma = (CellInfoWcdma) telephonyManager.getAllCellInfo().get(0);
         CellSignalStrengthWcdma cellSignalStrengthWcdma = cellInfoWcdma.getCellSignalStrength();
         strength = String.valueOf(cellSignalStrengthWcdma.getDbm());
       }else if(cellInfos.get(i) instanceof CellInfoGsm){
         CellInfoGsm cellInfogsm = (CellInfoGsm) telephonyManager.getAllCellInfo().get(0);
         CellSignalStrengthGsm cellSignalStrengthGsm = cellInfogsm.getCellSignalStrength();
         strength = String.valueOf(cellSignalStrengthGsm.getDbm());
       }else if(cellInfos.get(i) instanceof CellInfoLte){
         CellInfoLte cellInfoLte = (CellInfoLte) telephonyManager.getAllCellInfo().get(0);
         CellSignalStrengthLte cellSignalStrengthLte = cellInfoLte.getCellSignalStrength();
         strength = String.valueOf(cellSignalStrengthLte.getDbm());
       }
     }
   }
   return strength;
 }

TelephonyManager tm = (TelephonyManager) getActivity().getSystemService(Context.TELEPHONY_SERVICE);
    try {
     for (CellInfo info : tm.getAllCellInfo()) {
       if (info instanceof CellInfoGsm) {
         CellSignalStrengthGsm gsm = ((CellInfoGsm) info).getCellSignalStrength();
         // do what you need
         gsmStrength = String.valueOf(gsm.getDbm());
       } else if (info instanceof CellInfoCdma) {
         CellSignalStrengthCdma cdma = ((CellInfoCdma) info).getCellSignalStrength();
         gsmStrength = String.valueOf(cdma.getDbm());
       } else if (info instanceof CellInfoLte) {
         CellSignalStrengthLte lte = ((CellInfoLte) info).getCellSignalStrength();
         gsmStrength = String.valueOf(lte.getDbm());
       } else {
         gsmStrength = String.valueOf("Uknow");
       }
     }
    }catch (Exception e){
      LogUtils.LOG(e.getMessage());
    }

List<CellInfo> cellInfos=tel.getAllCellInfo();
   for (CellInfo varcell:cellInfos){
     if (varcell instanceof CellInfoLte){
       CellInfoLte cellInfoLte=(CellInfoLte)varcell;
       CellSignalStrengthLte cellSignalStrengthLte=(CellSignalStrengthLte)cellInfoLte.getCellSignalStrength();
      int Dbm= cellSignalStrengthLte.getDbm();
      int Asu= cellSignalStrengthLte.getAsuLevel();
       int Level= cellSignalStrengthLte.getLevel();
       int vci=cellInfoLte.getCellIdentity().getCi();

cellObj.put("cellId", identityLte.getCi());
cellObj.put("tac", identityLte.getTac());
cellObj.put("dbm", lte.getDbm());
cellList.put(cellObj);

  CellSignalStrengthLte cellStrengthL = ((CellInfoLte) (cellInfo)).getCellSignalStrength();
  return addOrUpdateCell(g.getOperatorKeyString(), g.getOperatorString(), g.getXfcn(), "LTE",
      cellStrengthL.getDbm(), NetworkType.typeForCode("L"), location);
case "CellInfoWcdma":
  if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) { //WHYYYYYY?

@SuppressWarnings("ChainOfInstanceofChecks")
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
private Cell parceCellInfo18(CellInfo info) {
  if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) return null;
  if (info instanceof CellInfoWcdma) {
    CellIdentityWcdma identity = ((CellInfoWcdma) info).getCellIdentity();
    if (identity.getMcc() == Integer.MAX_VALUE) return null;
    CellSignalStrengthWcdma strength = ((CellInfoWcdma) info).getCellSignalStrength();
    return new Cell(Cell.CellType.UMTS, identity.getMcc(), identity.getMnc(),
        identity.getLac(), identity.getCid(), identity.getPsc(), strength.getDbm());
  } else if (info instanceof CellInfoLte) {
    CellIdentityLte identity = ((CellInfoLte) info).getCellIdentity();
    if (identity.getMcc() == Integer.MAX_VALUE) return null;
    CellSignalStrengthLte strength = ((CellInfoLte) info).getCellSignalStrength();
    return new Cell(Cell.CellType.LTE, identity.getMcc(), identity.getMnc(),
        identity.getTac(), identity.getCi(), identity.getPci(), strength.getDbm());
  }
  return null;
}

result.setPsc(lteIdentity.getPci());
result.setStrengthdBm(((CellInfoLte) cell).getCellSignalStrength().getDbm());
result.setStrengthAsu(((CellInfoLte) cell).getCellSignalStrength().getAsuLevel());
return result;

out.name("dbm").value(lteInfo.getCellSignalStrength().getDbm());
writeIfKnown(out, "level", lteInfo.getCellSignalStrength().getLevel());
writeIfKnown(out, "timing_advance", lteInfo.getCellSignalStrength().getTimingAdvance());