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/*
* Copyright (C) 2017 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.bluetooth.le;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.os.Parcel;
import android.os.Parcelable;
/**
* The {@link AdvertisingSetParameters} provide a way to adjust advertising
* preferences for each
* Bluetooth LE advertising set. Use {@link AdvertisingSetParameters.Builder} to
* create an
* instance of this class.
*/
public final class AdvertisingSetParameters implements Parcelable {
/**
* Advertise on low frequency, around every 1000ms. This is the default and
* preferred advertising mode as it consumes the least power.
*/
public static final int INTERVAL_HIGH = 1600;
/**
* Advertise on medium frequency, around every 250ms. This is balanced
* between advertising frequency and power consumption.
*/
public static final int INTERVAL_MEDIUM = 400;
/**
* Perform high frequency, low latency advertising, around every 100ms. This
* has the highest power consumption and should not be used for continuous
* background advertising.
*/
public static final int INTERVAL_LOW = 160;
/**
* Minimum value for advertising interval.
*/
public static final int INTERVAL_MIN = 160;
/**
* Maximum value for advertising interval.
*/
public static final int INTERVAL_MAX = 16777215;
/**
* Advertise using the lowest transmission (TX) power level. Low transmission
* power can be used to restrict the visibility range of advertising packets.
*/
public static final int TX_POWER_ULTRA_LOW = -21;
/**
* Advertise using low TX power level.
*/
public static final int TX_POWER_LOW = -15;
/**
* Advertise using medium TX power level.
*/
public static final int TX_POWER_MEDIUM = -7;
/**
* Advertise using high TX power level. This corresponds to largest visibility
* range of the advertising packet.
*/
public static final int TX_POWER_HIGH = 1;
/**
* Minimum value for TX power.
*/
public static final int TX_POWER_MIN = -127;
/**
* Maximum value for TX power.
*/
public static final int TX_POWER_MAX = 1;
/**
* The maximum limited advertisement duration as specified by the Bluetooth
* SIG
*/
private static final int LIMITED_ADVERTISING_MAX_MILLIS = 180 * 1000;
private final boolean mIsLegacy;
private final boolean mIsAnonymous;
private final boolean mIncludeTxPower;
private final int mPrimaryPhy;
private final int mSecondaryPhy;
private final boolean mConnectable;
private final boolean mScannable;
private final int mInterval;
private final int mTxPowerLevel;
private AdvertisingSetParameters(boolean connectable, boolean scannable, boolean isLegacy,
boolean isAnonymous, boolean includeTxPower,
int primaryPhy, int secondaryPhy,
int interval, int txPowerLevel) {
mConnectable = connectable;
mScannable = scannable;
mIsLegacy = isLegacy;
mIsAnonymous = isAnonymous;
mIncludeTxPower = includeTxPower;
mPrimaryPhy = primaryPhy;
mSecondaryPhy = secondaryPhy;
mInterval = interval;
mTxPowerLevel = txPowerLevel;
}
private AdvertisingSetParameters(Parcel in) {
mConnectable = in.readInt() != 0;
mScannable = in.readInt() != 0;
mIsLegacy = in.readInt() != 0;
mIsAnonymous = in.readInt() != 0;
mIncludeTxPower = in.readInt() != 0;
mPrimaryPhy = in.readInt();
mSecondaryPhy = in.readInt();
mInterval = in.readInt();
mTxPowerLevel = in.readInt();
}
/**
* Returns whether the advertisement will be connectable.
*/
public boolean isConnectable() {
return mConnectable;
}
/**
* Returns whether the advertisement will be scannable.
*/
public boolean isScannable() {
return mScannable;
}
/**
* Returns whether the legacy advertisement will be used.
*/
public boolean isLegacy() {
return mIsLegacy;
}
/**
* Returns whether the advertisement will be anonymous.
*/
public boolean isAnonymous() {
return mIsAnonymous;
}
/**
* Returns whether the TX Power will be included.
*/
public boolean includeTxPower() {
return mIncludeTxPower;
}
/**
* Returns the primary advertising phy.
*/
public int getPrimaryPhy() {
return mPrimaryPhy;
}
/**
* Returns the secondary advertising phy.
*/
public int getSecondaryPhy() {
return mSecondaryPhy;
}
/**
* Returns the advertising interval.
*/
public int getInterval() {
return mInterval;
}
/**
* Returns the TX power level for advertising.
*/
public int getTxPowerLevel() {
return mTxPowerLevel;
}
@Override
public String toString() {
return "AdvertisingSetParameters [connectable=" + mConnectable
+ ", isLegacy=" + mIsLegacy
+ ", isAnonymous=" + mIsAnonymous
+ ", includeTxPower=" + mIncludeTxPower
+ ", primaryPhy=" + mPrimaryPhy
+ ", secondaryPhy=" + mSecondaryPhy
+ ", interval=" + mInterval
+ ", txPowerLevel=" + mTxPowerLevel + "]";
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(mConnectable ? 1 : 0);
dest.writeInt(mScannable ? 1 : 0);
dest.writeInt(mIsLegacy ? 1 : 0);
dest.writeInt(mIsAnonymous ? 1 : 0);
dest.writeInt(mIncludeTxPower ? 1 : 0);
dest.writeInt(mPrimaryPhy);
dest.writeInt(mSecondaryPhy);
dest.writeInt(mInterval);
dest.writeInt(mTxPowerLevel);
}
public static final @android.annotation.NonNull Parcelable.Creator<AdvertisingSetParameters> CREATOR =
new Creator<AdvertisingSetParameters>() {
@Override
public AdvertisingSetParameters[] newArray(int size) {
return new AdvertisingSetParameters[size];
}
@Override
public AdvertisingSetParameters createFromParcel(Parcel in) {
return new AdvertisingSetParameters(in);
}
};
/**
* Builder class for {@link AdvertisingSetParameters}.
*/
public static final class Builder {
private boolean mConnectable = false;
private boolean mScannable = false;
private boolean mIsLegacy = false;
private boolean mIsAnonymous = false;
private boolean mIncludeTxPower = false;
private int mPrimaryPhy = BluetoothDevice.PHY_LE_1M;
private int mSecondaryPhy = BluetoothDevice.PHY_LE_1M;
private int mInterval = INTERVAL_LOW;
private int mTxPowerLevel = TX_POWER_MEDIUM;
/**
* Set whether the advertisement type should be connectable or
* non-connectable.
* Legacy advertisements can be both connectable and scannable. Non-legacy
* advertisements can be only scannable or only connectable.
*
* @param connectable Controls whether the advertisement type will be connectable (true) or
* non-connectable (false).
*/
public Builder setConnectable(boolean connectable) {
mConnectable = connectable;
return this;
}
/**
* Set whether the advertisement type should be scannable.
* Legacy advertisements can be both connectable and scannable. Non-legacy
* advertisements can be only scannable or only connectable.
*
* @param scannable Controls whether the advertisement type will be scannable (true) or
* non-scannable (false).
*/
public Builder setScannable(boolean scannable) {
mScannable = scannable;
return this;
}
/**
* When set to true, advertising set will advertise 4.x Spec compliant
* advertisements.
*
* @param isLegacy whether legacy advertising mode should be used.
*/
public Builder setLegacyMode(boolean isLegacy) {
mIsLegacy = isLegacy;
return this;
}
/**
* Set whether advertiser address should be ommited from all packets. If this
* mode is used, periodic advertising can't be enabled for this set.
*
* This is used only if legacy mode is not used.
*
* @param isAnonymous whether anonymous advertising should be used.
*/
public Builder setAnonymous(boolean isAnonymous) {
mIsAnonymous = isAnonymous;
return this;
}
/**
* Set whether TX power should be included in the extended header.
*
* This is used only if legacy mode is not used.
*
* @param includeTxPower whether TX power should be included in extended header
*/
public Builder setIncludeTxPower(boolean includeTxPower) {
mIncludeTxPower = includeTxPower;
return this;
}
/**
* Set the primary physical channel used for this advertising set.
*
* This is used only if legacy mode is not used.
*
* Use {@link BluetoothAdapter#isLeCodedPhySupported} to determine if LE Coded PHY is
* supported on this device.
*
* @param primaryPhy Primary advertising physical channel, can only be {@link
* BluetoothDevice#PHY_LE_1M} or {@link BluetoothDevice#PHY_LE_CODED}.
* @throws IllegalArgumentException If the primaryPhy is invalid.
*/
public Builder setPrimaryPhy(int primaryPhy) {
if (primaryPhy != BluetoothDevice.PHY_LE_1M
&& primaryPhy != BluetoothDevice.PHY_LE_CODED) {
throw new IllegalArgumentException("bad primaryPhy " + primaryPhy);
}
mPrimaryPhy = primaryPhy;
return this;
}
/**
* Set the secondary physical channel used for this advertising set.
*
* This is used only if legacy mode is not used.
*
* Use {@link BluetoothAdapter#isLeCodedPhySupported} and
* {@link BluetoothAdapter#isLe2MPhySupported} to determine if LE Coded PHY or 2M PHY is
* supported on this device.
*
* @param secondaryPhy Secondary advertising physical channel, can only be one of {@link
* BluetoothDevice#PHY_LE_1M}, {@link BluetoothDevice#PHY_LE_2M} or {@link
* BluetoothDevice#PHY_LE_CODED}.
* @throws IllegalArgumentException If the secondaryPhy is invalid.
*/
public Builder setSecondaryPhy(int secondaryPhy) {
if (secondaryPhy != BluetoothDevice.PHY_LE_1M
&& secondaryPhy != BluetoothDevice.PHY_LE_2M
&& secondaryPhy != BluetoothDevice.PHY_LE_CODED) {
throw new IllegalArgumentException("bad secondaryPhy " + secondaryPhy);
}
mSecondaryPhy = secondaryPhy;
return this;
}
/**
* Set advertising interval.
*
* @param interval Bluetooth LE Advertising interval, in 0.625ms unit. Valid range is from
* 160 (100ms) to 16777215 (10,485.759375 s). Recommended values are: {@link
* AdvertisingSetParameters#INTERVAL_LOW}, {@link AdvertisingSetParameters#INTERVAL_MEDIUM},
* or {@link AdvertisingSetParameters#INTERVAL_HIGH}.
* @throws IllegalArgumentException If the interval is invalid.
*/
public Builder setInterval(int interval) {
if (interval < INTERVAL_MIN || interval > INTERVAL_MAX) {
throw new IllegalArgumentException("unknown interval " + interval);
}
mInterval = interval;
return this;
}
/**
* Set the transmission power level for the advertising.
*
* @param txPowerLevel Transmission power of Bluetooth LE Advertising, in dBm. The valid
* range is [-127, 1] Recommended values are:
* {@link AdvertisingSetParameters#TX_POWER_ULTRA_LOW},
* {@link AdvertisingSetParameters#TX_POWER_LOW},
* {@link AdvertisingSetParameters#TX_POWER_MEDIUM},
* or {@link AdvertisingSetParameters#TX_POWER_HIGH}.
* @throws IllegalArgumentException If the {@code txPowerLevel} is invalid.
*/
public Builder setTxPowerLevel(int txPowerLevel) {
if (txPowerLevel < TX_POWER_MIN || txPowerLevel > TX_POWER_MAX) {
throw new IllegalArgumentException("unknown txPowerLevel " + txPowerLevel);
}
mTxPowerLevel = txPowerLevel;
return this;
}
/**
* Build the {@link AdvertisingSetParameters} object.
*
* @throws IllegalStateException if invalid combination of parameters is used.
*/
public AdvertisingSetParameters build() {
if (mIsLegacy) {
if (mIsAnonymous) {
throw new IllegalArgumentException("Legacy advertising can't be anonymous");
}
if (mConnectable && !mScannable) {
throw new IllegalStateException(
"Legacy advertisement can't be connectable and non-scannable");
}
if (mIncludeTxPower) {
throw new IllegalStateException(
"Legacy advertising can't include TX power level in header");
}
} else {
if (mConnectable && mScannable) {
throw new IllegalStateException(
"Advertising can't be both connectable and scannable");
}
if (mIsAnonymous && mConnectable) {
throw new IllegalStateException(
"Advertising can't be both connectable and anonymous");
}
}
return new AdvertisingSetParameters(mConnectable, mScannable, mIsLegacy, mIsAnonymous,
mIncludeTxPower, mPrimaryPhy, mSecondaryPhy, mInterval, mTxPowerLevel);
}
}
}