Android example source code file (GsmCellLocation.java)

This example Android source code file (GsmCellLocation.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, celllocation, classcastexception, gsmcelllocation, object, os, override, string, telephony

The GsmCellLocation.java Android example source code

/*
 * Copyright (C) 2006 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.gsm;

import android.os.Bundle;
import android.telephony.CellLocation;

/**
 * Represents the cell location on a GSM phone.
 */
public class GsmCellLocation extends CellLocation {
    private int mLac;
    private int mCid;

    /**
     * Empty constructor.  Initializes the LAC and CID to -1.
     */
    public GsmCellLocation() {
        mLac = -1;
        mCid = -1;
    }

    /**
     * Initialize the object from a bundle.
     */
    public GsmCellLocation(Bundle bundle) {
        mLac = bundle.getInt("lac", mLac);
        mCid = bundle.getInt("cid", mCid);
    }

    /**
     * @return gsm location area code, -1 if unknown, 0xffff max legal value
     */
    public int getLac() {
        return mLac;
    }

    /**
     * @return gsm cell id, -1 if unknown, 0xffff max legal value
     */
    public int getCid() {
        return mCid;
    }

    /**
     * Invalidate this object.  The location area code and the cell id are set to -1.
     */
    public void setStateInvalid() {
        mLac = -1;
        mCid = -1;
    }

    /**
     * Set the location area code and the cell id.
     */
    public void setLacAndCid(int lac, int cid) {
        mLac = lac;
        mCid = cid;
    }

    @Override
    public int hashCode() {
        return mLac ^ mCid;
    }

    @Override
    public boolean equals(Object o) {
        GsmCellLocation s;

        try {
            s = (GsmCellLocation)o;
        } catch (ClassCastException ex) {
            return false;
        }

        if (o == null) {
            return false;
        }

        return equalsHandlesNulls(mLac, s.mLac) && equalsHandlesNulls(mCid, s.mCid);
    }

    @Override
    public String toString() {
        return "["+ mLac + "," + mCid + "]";
    }

    /**
     * Test whether two objects hold the same data values or both are null
     *
     * @param a first obj
     * @param b second obj
     * @return true if two objects equal or both are null
     */
    private static boolean equalsHandlesNulls(Object a, Object b) {
        return (a == null) ? (b == null) : a.equals (b);
    }

    /**
     * Set intent notifier Bundle based on service state
     *
     * @param m intent notifier Bundle
     */
    public void fillInNotifierBundle(Bundle m) {
        m.putInt("lac", mLac);
        m.putInt("cid", mCid);
    }

    /**
     * @hide
     */
    public boolean isEmpty() {
        return (mLac == -1 && mCid == -1);
    }
}