/*
* Copyright (C) 2007 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.location;
import android.os.Parcel;
import android.os.Parcelable;
/**
* A class indicating the application criteria for selecting a
* location provider. Providers maybe ordered according to accuracy,
* power usage, ability to report altitude, speed,
* and bearing, and monetary cost.
*/
public class Criteria implements Parcelable {
/**
* A constant indicating that the application does not choose to
* place requirement on a particular feature.
*/
public static final int NO_REQUIREMENT = 0;
/**
* A constant indicating a low power requirement.
*/
public static final int POWER_LOW = 1;
/**
* A constant indicating a medium power requirement.
*/
public static final int POWER_MEDIUM = 2;
/**
* A constant indicating a high power requirement.
*/
public static final int POWER_HIGH = 3;
/**
* A constant indicating a finer location accuracy requirement
*/
public static final int ACCURACY_FINE = 1;
/**
* A constant indicating an approximate accuracy requirement
*/
public static final int ACCURACY_COARSE = 2;
/**
* A constant indicating a low location accuracy requirement
* - may be used for horizontal, altitude, speed or bearing accuracy.
* For horizontal and vertical position this corresponds roughly to
* an accuracy of greater than 500 meters.
*/
public static final int ACCURACY_LOW = 1;
/**
* A constant indicating a medium accuracy requirement
* - currently used only for horizontal accuracy.
* For horizontal position this corresponds roughly to to an accuracy
* of between 100 and 500 meters.
*/
public static final int ACCURACY_MEDIUM = 2;
/**
* a constant indicating a high accuracy requirement
* - may be used for horizontal, altitude, speed or bearing accuracy.
* For horizontal and vertical position this corresponds roughly to
* an accuracy of less than 100 meters.
*/
public static final int ACCURACY_HIGH = 3;
private int mHorizontalAccuracy = NO_REQUIREMENT;
private int mVerticalAccuracy = NO_REQUIREMENT;
private int mSpeedAccuracy = NO_REQUIREMENT;
private int mBearingAccuracy = NO_REQUIREMENT;
private int mPowerRequirement = NO_REQUIREMENT;
private boolean mAltitudeRequired = false;
private boolean mBearingRequired = false;
private boolean mSpeedRequired = false;
private boolean mCostAllowed = false;
/**
* Constructs a new Criteria object. The new object will have no
* requirements on accuracy, power, or response time; will not
* require altitude, speed, or bearing; and will not allow monetary
* cost.
*/
public Criteria() {}
/**
* Constructs a new Criteria object that is a copy of the given criteria.
*/
public Criteria(Criteria criteria) {
mHorizontalAccuracy = criteria.mHorizontalAccuracy;
mVerticalAccuracy = criteria.mVerticalAccuracy;
mSpeedAccuracy = criteria.mSpeedAccuracy;
mBearingAccuracy = criteria.mBearingAccuracy;
mPowerRequirement = criteria.mPowerRequirement;
mAltitudeRequired = criteria.mAltitudeRequired;
mBearingRequired = criteria.mBearingRequired;
mSpeedRequired = criteria.mSpeedRequired;
mCostAllowed = criteria.mCostAllowed;
}
/**
* Indicates the desired horizontal accuracy (latitude and longitude).
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_MEDIUM},
* {@link #ACCURACY_HIGH} or {@link #NO_REQUIREMENT}.
* More accurate location may consume more power and may take longer.
*
* @throws IllegalArgumentException if accuracy is not one of the supported constants
*/
public void setHorizontalAccuracy(int accuracy) {
if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_HIGH) {
throw new IllegalArgumentException("accuracy=" + accuracy);
}
mHorizontalAccuracy = accuracy;
}
/**
* Returns a constant indicating the desired horizontal accuracy (latitude and longitude).
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_MEDIUM},
* {@link #ACCURACY_HIGH} or {@link #NO_REQUIREMENT}.
*/
public int getHorizontalAccuracy() {
return mHorizontalAccuracy;
}
/**
* Indicates the desired vertical accuracy (altitude).
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_MEDIUM},
* {@link #ACCURACY_HIGH} or {@link #NO_REQUIREMENT}.
* More accurate location may consume more power and may take longer.
*
* @throws IllegalArgumentException if accuracy is not one of the supported constants
*/
public void setVerticalAccuracy(int accuracy) {
if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_HIGH) {
throw new IllegalArgumentException("accuracy=" + accuracy);
}
mVerticalAccuracy = accuracy;
}
/**
* Returns a constant indicating the desired vertical accuracy (altitude).
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_HIGH},
* or {@link #NO_REQUIREMENT}.
*/
public int getVerticalAccuracy() {
return mVerticalAccuracy;
}
/**
* Indicates the desired speed accuracy.
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_HIGH},
* or {@link #NO_REQUIREMENT}.
* More accurate location may consume more power and may take longer.
*
* @throws IllegalArgumentException if accuracy is not one of the supported constants
*/
public void setSpeedAccuracy(int accuracy) {
if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_HIGH) {
throw new IllegalArgumentException("accuracy=" + accuracy);
}
mSpeedAccuracy = accuracy;
}
/**
* Returns a constant indicating the desired speed accuracy
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_HIGH},
* or {@link #NO_REQUIREMENT}.
*/
public int getSpeedAccuracy() {
return mSpeedAccuracy;
}
/**
* Indicates the desired bearing accuracy.
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_HIGH},
* or {@link #NO_REQUIREMENT}.
* More accurate location may consume more power and may take longer.
*
* @throws IllegalArgumentException if accuracy is not one of the supported constants
*/
public void setBearingAccuracy(int accuracy) {
if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_HIGH) {
throw new IllegalArgumentException("accuracy=" + accuracy);
}
mBearingAccuracy = accuracy;
}
/**
* Returns a constant indicating the desired bearing accuracy.
* Accuracy may be {@link #ACCURACY_LOW}, {@link #ACCURACY_HIGH},
* or {@link #NO_REQUIREMENT}.
*/
public int getBearingAccuracy() {
return mBearingAccuracy;
}
/**
* Indicates the desired accuracy for latitude and longitude. Accuracy
* may be {@link #ACCURACY_FINE} if desired location
* is fine, else it can be {@link #ACCURACY_COARSE}.
* More accurate location may consume more power and may take longer.
*
* @throws IllegalArgumentException if accuracy is not one of the supported constants
*/
public void setAccuracy(int accuracy) {
if (accuracy < NO_REQUIREMENT || accuracy > ACCURACY_COARSE) {
throw new IllegalArgumentException("accuracy=" + accuracy);
}
if (accuracy == ACCURACY_FINE) {
mHorizontalAccuracy = ACCURACY_HIGH;
} else {
mHorizontalAccuracy = ACCURACY_LOW;
}
}
/**
* Returns a constant indicating desired accuracy of location
* Accuracy may be {@link #ACCURACY_FINE} if desired location
* is fine, else it can be {@link #ACCURACY_COARSE}.
*/
public int getAccuracy() {
if (mHorizontalAccuracy >= ACCURACY_HIGH) {
return ACCURACY_FINE;
} else {
return ACCURACY_COARSE;
}
}
/**
* Indicates the desired maximum power level. The level parameter
* must be one of NO_REQUIREMENT, POWER_LOW, POWER_MEDIUM, or
* POWER_HIGH.
*/
public void setPowerRequirement(int level) {
if (level < NO_REQUIREMENT || level > POWER_HIGH) {
throw new IllegalArgumentException("level=" + level);
}
mPowerRequirement = level;
}
/**
* Returns a constant indicating the desired power requirement. The
* returned
*/
public int getPowerRequirement() {
return mPowerRequirement;
}
/**
* Indicates whether the provider is allowed to incur monetary cost.
*/
public void setCostAllowed(boolean costAllowed) {
mCostAllowed = costAllowed;
}
/**
* Returns whether the provider is allowed to incur monetary cost.
*/
public boolean isCostAllowed() {
return mCostAllowed;
}
/**
* Indicates whether the provider must provide altitude information.
* Not all fixes are guaranteed to contain such information.
*/
public void setAltitudeRequired(boolean altitudeRequired) {
mAltitudeRequired = altitudeRequired;
}
/**
* Returns whether the provider must provide altitude information.
* Not all fixes are guaranteed to contain such information.
*/
public boolean isAltitudeRequired() {
return mAltitudeRequired;
}
/**
* Indicates whether the provider must provide speed information.
* Not all fixes are guaranteed to contain such information.
*/
public void setSpeedRequired(boolean speedRequired) {
mSpeedRequired = speedRequired;
}
/**
* Returns whether the provider must provide speed information.
* Not all fixes are guaranteed to contain such information.
*/
public boolean isSpeedRequired() {
return mSpeedRequired;
}
/**
* Indicates whether the provider must provide bearing information.
* Not all fixes are guaranteed to contain such information.
*/
public void setBearingRequired(boolean bearingRequired) {
mBearingRequired = bearingRequired;
}
/**
* Returns whether the provider must provide bearing information.
* Not all fixes are guaranteed to contain such information.
*/
public boolean isBearingRequired() {
return mBearingRequired;
}
public static final Parcelable.Creator<Criteria> CREATOR =
new Parcelable.Creator<Criteria>() {
@Override
public Criteria createFromParcel(Parcel in) {
Criteria c = new Criteria();
c.mHorizontalAccuracy = in.readInt();
c.mVerticalAccuracy = in.readInt();
c.mSpeedAccuracy = in.readInt();
c.mBearingAccuracy = in.readInt();
c.mPowerRequirement = in.readInt();
c.mAltitudeRequired = in.readInt() != 0;
c.mBearingRequired = in.readInt() != 0;
c.mSpeedRequired = in.readInt() != 0;
c.mCostAllowed = in.readInt() != 0;
return c;
}
@Override
public Criteria[] newArray(int size) {
return new Criteria[size];
}
};
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int flags) {
parcel.writeInt(mHorizontalAccuracy);
parcel.writeInt(mVerticalAccuracy);
parcel.writeInt(mSpeedAccuracy);
parcel.writeInt(mBearingAccuracy);
parcel.writeInt(mPowerRequirement);
parcel.writeInt(mAltitudeRequired ? 1 : 0);
parcel.writeInt(mBearingRequired ? 1 : 0);
parcel.writeInt(mSpeedRequired ? 1 : 0);
parcel.writeInt(mCostAllowed ? 1 : 0);
}
private static String powerToString(int power) {
switch (power) {
case NO_REQUIREMENT:
return "NO_REQ";
case POWER_LOW:
return "LOW";
case POWER_MEDIUM:
return "MEDIUM";
case POWER_HIGH:
return "HIGH";
default:
return "???";
}
}
private static String accuracyToString(int accuracy) {
switch (accuracy) {
case NO_REQUIREMENT:
return "---";
case ACCURACY_HIGH:
return "HIGH";
case ACCURACY_MEDIUM:
return "MEDIUM";
case ACCURACY_LOW:
return "LOW";
default:
return "???";
}
}
@Override
public String toString() {
StringBuilder s = new StringBuilder();
s.append("Criteria[power=").append(powerToString(mPowerRequirement));
s.append(" acc=").append(accuracyToString(mHorizontalAccuracy));
s.append(']');
return s.toString();
}
}
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