Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.telephony; import android.annotation.Nullable; import android.annotation.UnsupportedAppUsage; import android.os.Parcel; import android.telephony.gsm.GsmCellLocation; import android.text.TextUtils; import java.util.Objects; /** * CellIdentity to represent a unique GSM cell */ public final class CellIdentityGsm extends CellIdentity { private static final String TAG = CellIdentityGsm.class.getSimpleName(); private static final boolean DBG = false; private static final int MAX_LAC = 65535; private static final int MAX_CID = 65535; private static final int MAX_ARFCN = 65535; private static final int MAX_BSIC = 63; // 16-bit Location Area Code, 0..65535 private final int mLac; // 16-bit GSM Cell Identity described in TS 27.007, 0..65535 private final int mCid; // 16-bit GSM Absolute RF Channel Number private final int mArfcn; // 6-bit Base Station Identity Code private final int mBsic; /** * @hide */ @UnsupportedAppUsage public CellIdentityGsm() { super(TAG, CellInfo.TYPE_GSM, null, null, null, null); mLac = CellInfo.UNAVAILABLE; mCid = CellInfo.UNAVAILABLE; mArfcn = CellInfo.UNAVAILABLE; mBsic = CellInfo.UNAVAILABLE; } /** * public constructor * @param lac 16-bit Location Area Code, 0..65535 * @param cid 16-bit GSM Cell Identity or 28-bit UMTS Cell Identity * @param arfcn 16-bit GSM Absolute RF Channel Number * @param bsic 6-bit Base Station Identity Code * @param mccStr 3-digit Mobile Country Code in string format * @param mncStr 2 or 3-digit Mobile Network Code in string format * @param alphal long alpha Operator Name String or Enhanced Operator Name String * @param alphas short alpha Operator Name String or Enhanced Operator Name String * * @hide */ public CellIdentityGsm(int lac, int cid, int arfcn, int bsic, String mccStr, String mncStr, String alphal, String alphas) { super(TAG, CellInfo.TYPE_GSM, mccStr, mncStr, alphal, alphas); mLac = inRangeOrUnavailable(lac, 0, MAX_LAC); mCid = inRangeOrUnavailable(cid, 0, MAX_CID); mArfcn = inRangeOrUnavailable(arfcn, 0, MAX_ARFCN); mBsic = inRangeOrUnavailable(bsic, 0, MAX_BSIC); } /** @hide */ public CellIdentityGsm(android.hardware.radio.V1_0.CellIdentityGsm cid) { this(cid.lac, cid.cid, cid.arfcn, cid.bsic == (byte) 0xFF ? CellInfo.UNAVAILABLE : cid.bsic, cid.mcc, cid.mnc, "", ""); } /** @hide */ public CellIdentityGsm(android.hardware.radio.V1_2.CellIdentityGsm cid) { this(cid.base.lac, cid.base.cid, cid.base.arfcn, cid.base.bsic == (byte) 0xFF ? CellInfo.UNAVAILABLE : cid.base.bsic, cid.base.mcc, cid.base.mnc, cid.operatorNames.alphaLong, cid.operatorNames.alphaShort); } private CellIdentityGsm(CellIdentityGsm cid) { this(cid.mLac, cid.mCid, cid.mArfcn, cid.mBsic, cid.mMccStr, cid.mMncStr, cid.mAlphaLong, cid.mAlphaShort); } CellIdentityGsm copy() { return new CellIdentityGsm(this); } /** @hide */ public CellIdentityGsm sanitizeLocationInfo() { return new CellIdentityGsm(CellInfo.UNAVAILABLE, CellInfo.UNAVAILABLE, CellInfo.UNAVAILABLE, CellInfo.UNAVAILABLE, mMccStr, mMncStr, mAlphaLong, mAlphaShort); } /** * @return 3-digit Mobile Country Code, 0..999, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. * @deprecated Use {@link #getMccString} instead. */ @Deprecated public int getMcc() { return (mMccStr != null) ? Integer.valueOf(mMccStr) : CellInfo.UNAVAILABLE; } /** * @return 2 or 3-digit Mobile Network Code, 0..999, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. * @deprecated Use {@link #getMncString} instead. */ @Deprecated public int getMnc() { return (mMncStr != null) ? Integer.valueOf(mMncStr) : CellInfo.UNAVAILABLE; } /** * @return 16-bit Location Area Code, 0..65535, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getLac() { return mLac; } /** * @return 16-bit GSM Cell Identity described in TS 27.007, 0..65535, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getCid() { return mCid; } /** * @return 16-bit GSM Absolute RF Channel Number, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getArfcn() { return mArfcn; } /** * @return 6-bit Base Station Identity Code, * {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} if unavailable. */ public int getBsic() { return mBsic; } /** * @return a 5 or 6 character string (MCC+MNC), null if any field is unknown. */ @Nullable public String getMobileNetworkOperator() { return (mMccStr == null || mMncStr == null) ? null : mMccStr + mMncStr; } /** * @return Mobile Country Code in string format, null if unavailable. */ @Nullable public String getMccString() { return mMccStr; } /** * @return Mobile Network Code in string format, null if unavailable. */ @Nullable public String getMncString() { return mMncStr; } /** @hide */ @Override public int getChannelNumber() { return mArfcn; } /** * @deprecated Primary Scrambling Code is not applicable to GSM. * @return {@link android.telephony.CellInfo#UNAVAILABLE UNAVAILABLE} - undefined for GSM */ @Deprecated public int getPsc() { return CellInfo.UNAVAILABLE; } /** @hide */ @Override public GsmCellLocation asCellLocation() { GsmCellLocation cl = new GsmCellLocation(); int lac = mLac != CellInfo.UNAVAILABLE ? mLac : -1; int cid = mCid != CellInfo.UNAVAILABLE ? mCid : -1; cl.setLacAndCid(lac, cid); cl.setPsc(-1); return cl; } @Override public int hashCode() { return Objects.hash(mLac, mCid, super.hashCode()); } @Override public boolean equals(Object other) { if (this == other) { return true; } if (!(other instanceof CellIdentityGsm)) { return false; } CellIdentityGsm o = (CellIdentityGsm) other; return mLac == o.mLac && mCid == o.mCid && mArfcn == o.mArfcn && mBsic == o.mBsic && TextUtils.equals(mMccStr, o.mMccStr) && TextUtils.equals(mMncStr, o.mMncStr) && super.equals(other); } @Override public String toString() { return new StringBuilder(TAG).append(":{ mLac=").append(mLac).append(" mCid=").append(mCid) .append(" mArfcn=").append(mArfcn).append(" mBsic=").append("0x").append(Integer.toHexString(mBsic)) .append(" mMcc=").append(mMccStr).append(" mMnc=").append(mMncStr).append(" mAlphaLong=") .append(mAlphaLong).append(" mAlphaShort=").append(mAlphaShort).append("}").toString(); } /** Implement the Parcelable interface */ @Override public void writeToParcel(Parcel dest, int flags) { if (DBG) log("writeToParcel(Parcel, int): " + toString()); super.writeToParcel(dest, CellInfo.TYPE_GSM); dest.writeInt(mLac); dest.writeInt(mCid); dest.writeInt(mArfcn); dest.writeInt(mBsic); } /** Construct from Parcel, type has already been processed */ private CellIdentityGsm(Parcel in) { super(TAG, CellInfo.TYPE_GSM, in); mLac = in.readInt(); mCid = in.readInt(); mArfcn = in.readInt(); mBsic = in.readInt(); if (DBG) log(toString()); } /** Implement the Parcelable interface */ @SuppressWarnings("hiding") public static final Creator<CellIdentityGsm> CREATOR = new Creator<CellIdentityGsm>() { @Override public CellIdentityGsm createFromParcel(Parcel in) { in.readInt(); // skip return createFromParcelBody(in); } @Override public CellIdentityGsm[] newArray(int size) { return new CellIdentityGsm[size]; } }; /** @hide */ protected static CellIdentityGsm createFromParcelBody(Parcel in) { return new CellIdentityGsm(in); } }