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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* 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.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SystemApi;
import android.os.Parcel;
import android.os.Parcelable;
import com.android.internal.telephony.uicc.IccUtils;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.time.DateTimeException;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.Arrays;
/**
* Contains information elements for a GSM or UMTS ETWS (Earthquake and Tsunami Warning
* System) warning notification. Supported values for each element are defined in 3GPP TS 23.041.
*
* {@hide}
*/
@SystemApi
public final class SmsCbEtwsInfo implements Parcelable {
/** ETWS warning type for earthquake. */
public static final int ETWS_WARNING_TYPE_EARTHQUAKE = 0x00;
/** ETWS warning type for tsunami. */
public static final int ETWS_WARNING_TYPE_TSUNAMI = 0x01;
/** ETWS warning type for earthquake and tsunami. */
public static final int ETWS_WARNING_TYPE_EARTHQUAKE_AND_TSUNAMI = 0x02;
/** ETWS warning type for test messages. */
public static final int ETWS_WARNING_TYPE_TEST_MESSAGE = 0x03;
/** ETWS warning type for other emergency types. */
public static final int ETWS_WARNING_TYPE_OTHER_EMERGENCY = 0x04;
/** Unknown ETWS warning type. */
public static final int ETWS_WARNING_TYPE_UNKNOWN = -1;
/** @hide */
@Retention(RetentionPolicy.SOURCE)
@IntDef(prefix = {"ETWS_WARNING_TYPE_"},
value = {
ETWS_WARNING_TYPE_EARTHQUAKE,
ETWS_WARNING_TYPE_TSUNAMI,
ETWS_WARNING_TYPE_EARTHQUAKE_AND_TSUNAMI,
ETWS_WARNING_TYPE_TEST_MESSAGE,
ETWS_WARNING_TYPE_OTHER_EMERGENCY,
ETWS_WARNING_TYPE_UNKNOWN,
})
public @interface WarningType {}
/** One of the ETWS warning type constants defined in this class. */
private final @WarningType int mWarningType;
/** Whether or not to activate the emergency user alert tone and vibration. */
private final boolean mIsEmergencyUserAlert;
/** Whether or not to activate a popup alert. */
private final boolean mIsPopupAlert;
/** Whether ETWS primary message or not/ */
private final boolean mIsPrimary;
/**
* 50-byte security information (ETWS primary notification for GSM only). As of Release 10,
* 3GPP TS 23.041 states that the UE shall ignore the ETWS primary notification timestamp
* and digital signature if received. Therefore it is treated as a raw byte array and
* parceled with the broadcast intent if present, but the timestamp is only computed if an
* application asks for the individual components.
*/
@Nullable
private final byte[] mWarningSecurityInformation;
/**
* Create a new SmsCbEtwsInfo object with the specified values.
* @param warningType the type of ETWS warning
* @param isEmergencyUserAlert whether the warning is an emergency alert, which will activate
* the user alert tone and vibration
* @param isPopupAlert whether the warning will activate a popup alert
* @param isPrimary whether this is an ETWS primary message
* @param warningSecurityInformation 50-byte security information (for primary notifications
* on GSM only).
*/
public SmsCbEtwsInfo(@WarningType int warningType, boolean isEmergencyUserAlert,
boolean isPopupAlert,
boolean isPrimary, @Nullable byte[] warningSecurityInformation) {
mWarningType = warningType;
mIsEmergencyUserAlert = isEmergencyUserAlert;
mIsPopupAlert = isPopupAlert;
mIsPrimary = isPrimary;
mWarningSecurityInformation = warningSecurityInformation;
}
/** Create a new SmsCbEtwsInfo object from a Parcel. */
SmsCbEtwsInfo(Parcel in) {
mWarningType = in.readInt();
mIsEmergencyUserAlert = (in.readInt() != 0);
mIsPopupAlert = (in.readInt() != 0);
mIsPrimary = (in.readInt() != 0);
mWarningSecurityInformation = in.createByteArray();
}
/**
* Flatten this object into a Parcel.
*
* @param dest The Parcel in which the object should be written.
* @param flags Additional flags about how the object should be written (ignored).
*/
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mWarningType);
dest.writeInt(mIsEmergencyUserAlert ? 1 : 0);
dest.writeInt(mIsPopupAlert ? 1 : 0);
dest.writeInt(mIsPrimary ? 1 : 0);
dest.writeByteArray(mWarningSecurityInformation);
}
/**
* Returns the ETWS warning type.
* @return a warning type such as {@link #ETWS_WARNING_TYPE_EARTHQUAKE}
*/
public @WarningType int getWarningType() {
return mWarningType;
}
/**
* Returns the ETWS emergency user alert flag. If the ETWS message is an emergency alert, it
* will activate an alert tone and vibration.
* @return true to notify terminal to activate emergency user alert; false otherwise
*/
public boolean isEmergencyUserAlert() {
return mIsEmergencyUserAlert;
}
/**
* Returns the ETWS activate popup flag.
* @return true to notify terminal to activate display popup; false otherwise
*/
public boolean isPopupAlert() {
return mIsPopupAlert;
}
/**
* Returns the ETWS format flag.
* @return true if the message is primary message, otherwise secondary message
*/
public boolean isPrimary() {
return mIsPrimary;
}
/**
* Returns the Warning-Security-Information timestamp (GSM primary notifications only).
* As of Release 10, 3GPP TS 23.041 states that the UE shall ignore this value if received.
* @return a UTC timestamp in System.currentTimeMillis() format, or 0 if not present or invalid.
*/
public long getPrimaryNotificationTimestamp() {
if (mWarningSecurityInformation == null || mWarningSecurityInformation.length < 7) {
return 0;
}
int year = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[0]);
int month = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[1]);
int day = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[2]);
int hour = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[3]);
int minute = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[4]);
int second = IccUtils.gsmBcdByteToInt(mWarningSecurityInformation[5]);
// For the timezone, the most significant bit of the
// least significant nibble is the sign byte
// (meaning the max range of this field is 79 quarter-hours,
// which is more than enough)
byte tzByte = mWarningSecurityInformation[6];
// Mask out sign bit.
int timezoneOffset = IccUtils.gsmBcdByteToInt((byte) (tzByte & (~0x08)));
timezoneOffset = ((tzByte & 0x08) == 0) ? timezoneOffset : -timezoneOffset;
// timezoneOffset is in quarter hours.
int timeZoneOffsetSeconds = timezoneOffset * 15 * 60;
try {
LocalDateTime localDateTime = LocalDateTime.of(
// We only need to support years above 2000.
year + 2000,
month /* 1-12 */,
day,
hour,
minute,
second);
long epochSeconds = localDateTime.toEpochSecond(ZoneOffset.UTC) - timeZoneOffsetSeconds;
// Convert to milliseconds, ignore overflow.
return epochSeconds * 1000;
} catch (DateTimeException ex) {
// No-op
}
return 0;
}
/**
* Returns the digital signature (GSM primary notifications only). As of Release 10,
* 3GPP TS 23.041 states that the UE shall ignore this value if received.
* @return a byte array containing a copy of the primary notification digital signature
*/
@Nullable
public byte[] getPrimaryNotificationSignature() {
if (mWarningSecurityInformation == null || mWarningSecurityInformation.length < 50) {
return null;
}
return Arrays.copyOfRange(mWarningSecurityInformation, 7, 50);
}
@Override
public String toString() {
return "SmsCbEtwsInfo{warningType=" + mWarningType + ", emergencyUserAlert="
+ mIsEmergencyUserAlert + ", activatePopup=" + mIsPopupAlert + '}';
}
/**
* Describe the kinds of special objects contained in the marshalled representation.
* @return a bitmask indicating this Parcelable contains no special objects
*/
@Override
public int describeContents() {
return 0;
}
/** Creator for unparcelling objects. */
@NonNull
public static final Creator CREATOR = new Creator() {
@Override
public SmsCbEtwsInfo createFromParcel(Parcel in) {
return new SmsCbEtwsInfo(in);
}
@Override
public SmsCbEtwsInfo[] newArray(int size) {
return new SmsCbEtwsInfo[size];
}
};
}
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