673 lines
24 KiB
Java
673 lines
24 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.location;
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import android.annotation.SystemApi;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.os.SystemClock;
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import android.os.WorkSource;
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import android.util.TimeUtils;
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/**
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* A data object that contains quality of service parameters for requests
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* to the {@link LocationManager}.
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*
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* <p>LocationRequest objects are used to request a quality of service
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* for location updates from the Location Manager.
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*
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* <p>For example, if your application wants high accuracy location
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* it should create a location request with {@link #setQuality} set to
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* {@link #ACCURACY_FINE} or {@link #POWER_HIGH}, and it should set
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* {@link #setInterval} to less than one second. This would be
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* appropriate for mapping applications that are showing your location
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* in real-time.
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*
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* <p>At the other extreme, if you want negligible power
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* impact, but to still receive location updates when available, then use
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* {@link #setQuality} with {@link #POWER_NONE}. With this request your
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* application will not trigger (and therefore will not receive any
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* power blame) any location updates, but will receive locations
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* triggered by other applications. This would be appropriate for
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* applications that have no firm requirement for location, but can
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* take advantage when available.
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*
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* <p>In between these two extremes is a very common use-case, where
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* applications definitely want to receive
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* updates at a specified interval, and can receive them faster when
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* available, but still want a low power impact. These applications
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* should consider {@link #POWER_LOW} combined with a faster
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* {@link #setFastestInterval} (such as 1 minute) and a slower
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* {@link #setInterval} (such as 60 minutes). They will only be assigned
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* power blame for the interval set by {@link #setInterval}, but can
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* still receive locations triggered by other applications at a rate up
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* to {@link #setFastestInterval}. This style of request is appropriate for
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* many location aware applications, including background usage. Do be
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* careful to also throttle {@link #setFastestInterval} if you perform
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* heavy-weight work after receiving an update - such as using the network.
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*
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* <p>Activities should strongly consider removing all location
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* request when entering the background
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* (for example at {@link android.app.Activity#onPause}), or
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* at least swap the request to a larger interval and lower quality.
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* Future version of the location manager may automatically perform background
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* throttling on behalf of applications.
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*
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* <p>Applications cannot specify the exact location sources that are
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* used by Android's <em>Fusion Engine</em>. In fact, the system
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* may have multiple location sources (providers) running and may
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* fuse the results from several sources into a single Location object.
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*
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* <p>Location requests from applications with
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* {@link android.Manifest.permission#ACCESS_COARSE_LOCATION} and not
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* {@link android.Manifest.permission#ACCESS_FINE_LOCATION} will
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* be automatically throttled to a slower interval, and the location
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* object will be obfuscated to only show a coarse level of accuracy.
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*
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* <p>All location requests are considered hints, and you may receive
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* locations that are more accurate, less accurate, and slower
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* than requested.
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*
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* @hide
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*/
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@SystemApi
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public final class LocationRequest implements Parcelable {
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/**
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* Used with {@link #setQuality} to request the most accurate locations available.
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*
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* <p>This may be up to 1 meter accuracy, although this is implementation dependent.
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*/
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public static final int ACCURACY_FINE = 100;
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/**
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* Used with {@link #setQuality} to request "block" level accuracy.
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*
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* <p>Block level accuracy is considered to be about 100 meter accuracy,
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* although this is implementation dependent. Using a coarse accuracy
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* such as this often consumes less power.
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*/
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public static final int ACCURACY_BLOCK = 102;
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/**
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* Used with {@link #setQuality} to request "city" level accuracy.
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*
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* <p>City level accuracy is considered to be about 10km accuracy,
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* although this is implementation dependent. Using a coarse accuracy
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* such as this often consumes less power.
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*/
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public static final int ACCURACY_CITY = 104;
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/**
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* Used with {@link #setQuality} to require no direct power impact (passive locations).
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*
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* <p>This location request will not trigger any active location requests,
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* but will receive locations triggered by other applications. Your application
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* will not receive any direct power blame for location work.
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*/
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public static final int POWER_NONE = 200;
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/**
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* Used with {@link #setQuality} to request low power impact.
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*
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* <p>This location request will avoid high power location work where
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* possible.
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*/
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public static final int POWER_LOW = 201;
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/**
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* Used with {@link #setQuality} to allow high power consumption for location.
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*
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* <p>This location request will allow high power location work.
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*/
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public static final int POWER_HIGH = 203;
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/**
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* By default, mFastestInterval = FASTEST_INTERVAL_MULTIPLE * mInterval
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*/
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private static final double FASTEST_INTERVAL_FACTOR = 6.0; // 6x
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private int mQuality = POWER_LOW;
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private long mInterval = 60 * 60 * 1000; // 60 minutes
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private long mFastestInterval = (long)(mInterval / FASTEST_INTERVAL_FACTOR); // 10 minutes
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private boolean mExplicitFastestInterval = false;
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private long mExpireAt = Long.MAX_VALUE; // no expiry
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private int mNumUpdates = Integer.MAX_VALUE; // no expiry
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private float mSmallestDisplacement = 0.0f; // meters
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private WorkSource mWorkSource = null;
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private boolean mHideFromAppOps = false; // True if this request shouldn't be counted by AppOps
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private String mProvider = LocationManager.FUSED_PROVIDER; // for deprecated APIs that explicitly request a provider
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/**
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* Create a location request with default parameters.
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*
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* <p>Default parameters are for a low power, slowly updated location.
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* It can then be adjusted as required by the applications before passing
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* to the {@link LocationManager}
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*
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* @return a new location request
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*/
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public static LocationRequest create() {
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LocationRequest request = new LocationRequest();
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return request;
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}
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/** @hide */
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@SystemApi
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public static LocationRequest createFromDeprecatedProvider(String provider, long minTime,
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float minDistance, boolean singleShot) {
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if (minTime < 0) minTime = 0;
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if (minDistance < 0) minDistance = 0;
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int quality;
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if (LocationManager.PASSIVE_PROVIDER.equals(provider)) {
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quality = POWER_NONE;
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} else if (LocationManager.GPS_PROVIDER.equals(provider)) {
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quality = ACCURACY_FINE;
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} else {
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quality = POWER_LOW;
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}
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LocationRequest request = new LocationRequest()
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.setProvider(provider)
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.setQuality(quality)
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.setInterval(minTime)
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.setFastestInterval(minTime)
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.setSmallestDisplacement(minDistance);
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if (singleShot) request.setNumUpdates(1);
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return request;
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}
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/** @hide */
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@SystemApi
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public static LocationRequest createFromDeprecatedCriteria(Criteria criteria, long minTime,
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float minDistance, boolean singleShot) {
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if (minTime < 0) minTime = 0;
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if (minDistance < 0) minDistance = 0;
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int quality;
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switch (criteria.getAccuracy()) {
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case Criteria.ACCURACY_COARSE:
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quality = ACCURACY_BLOCK;
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break;
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case Criteria.ACCURACY_FINE:
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quality = ACCURACY_FINE;
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break;
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default: {
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switch (criteria.getPowerRequirement()) {
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case Criteria.POWER_HIGH:
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quality = POWER_HIGH;
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break;
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default:
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quality = POWER_LOW;
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}
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}
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}
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LocationRequest request = new LocationRequest()
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.setQuality(quality)
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.setInterval(minTime)
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.setFastestInterval(minTime)
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.setSmallestDisplacement(minDistance);
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if (singleShot) request.setNumUpdates(1);
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return request;
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}
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/** @hide */
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public LocationRequest() { }
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/** @hide */
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public LocationRequest(LocationRequest src) {
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mQuality = src.mQuality;
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mInterval = src.mInterval;
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mFastestInterval = src.mFastestInterval;
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mExplicitFastestInterval = src.mExplicitFastestInterval;
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mExpireAt = src.mExpireAt;
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mNumUpdates = src.mNumUpdates;
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mSmallestDisplacement = src.mSmallestDisplacement;
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mProvider = src.mProvider;
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mWorkSource = src.mWorkSource;
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mHideFromAppOps = src.mHideFromAppOps;
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}
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/**
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* Set the quality of the request.
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*
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* <p>Use with a accuracy constant such as {@link #ACCURACY_FINE}, or a power
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* constant such as {@link #POWER_LOW}. You cannot request both and accuracy and
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* power, only one or the other can be specified. The system will then
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* maximize accuracy or minimize power as appropriate.
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*
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* <p>The quality of the request is a strong hint to the system for which
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* location sources to use. For example, {@link #ACCURACY_FINE} is more likely
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* to use GPS, and {@link #POWER_LOW} is more likely to use WIFI & Cell tower
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* positioning, but it also depends on many other factors (such as which sources
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* are available) and is implementation dependent.
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*
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* <p>{@link #setQuality} and {@link #setInterval} are the most important parameters
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* on a location request.
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*
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* @param quality an accuracy or power constant
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* @throws InvalidArgumentException if the quality constant is not valid
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setQuality(int quality) {
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checkQuality(quality);
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mQuality = quality;
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return this;
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}
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/**
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* Get the quality of the request.
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*
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* @return an accuracy or power constant
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*/
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public int getQuality() {
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return mQuality;
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}
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/**
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* Set the desired interval for active location updates, in milliseconds.
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*
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* <p>The location manager will actively try to obtain location updates
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* for your application at this interval, so it has a
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* direct influence on the amount of power used by your application.
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* Choose your interval wisely.
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*
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* <p>This interval is inexact. You may not receive updates at all (if
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* no location sources are available), or you may receive them
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* slower than requested. You may also receive them faster than
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* requested (if other applications are requesting location at a
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* faster interval). The fastest rate that you will receive
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* updates can be controlled with {@link #setFastestInterval}.
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*
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* <p>Applications with only the coarse location permission may have their
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* interval silently throttled.
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*
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* <p>An interval of 0 is allowed, but not recommended, since
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* location updates may be extremely fast on future implementations.
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*
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* <p>{@link #setQuality} and {@link #setInterval} are the most important parameters
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* on a location request.
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*
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* @param millis desired interval in millisecond, inexact
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* @throws InvalidArgumentException if the interval is less than zero
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setInterval(long millis) {
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checkInterval(millis);
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mInterval = millis;
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if (!mExplicitFastestInterval) {
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mFastestInterval = (long)(mInterval / FASTEST_INTERVAL_FACTOR);
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}
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return this;
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}
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/**
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* Get the desired interval of this request, in milliseconds.
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*
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* @return desired interval in milliseconds, inexact
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*/
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public long getInterval() {
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return mInterval;
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}
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/**
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* Explicitly set the fastest interval for location updates, in
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* milliseconds.
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*
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* <p>This controls the fastest rate at which your application will
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* receive location updates, which might be faster than
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* {@link #setInterval} in some situations (for example, if other
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* applications are triggering location updates).
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*
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* <p>This allows your application to passively acquire locations
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* at a rate faster than it actively acquires locations, saving power.
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*
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* <p>Unlike {@link #setInterval}, this parameter is exact. Your
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* application will never receive updates faster than this value.
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*
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* <p>If you don't call this method, a fastest interval
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* will be selected for you. It will be a value faster than your
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* active interval ({@link #setInterval}).
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*
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* <p>An interval of 0 is allowed, but not recommended, since
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* location updates may be extremely fast on future implementations.
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*
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* <p>If {@link #setFastestInterval} is set slower than {@link #setInterval},
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* then your effective fastest interval is {@link #setInterval}.
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*
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* @param millis fastest interval for updates in milliseconds, exact
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* @throws InvalidArgumentException if the interval is less than zero
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setFastestInterval(long millis) {
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checkInterval(millis);
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mExplicitFastestInterval = true;
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mFastestInterval = millis;
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return this;
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}
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/**
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* Get the fastest interval of this request, in milliseconds.
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*
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* <p>The system will never provide location updates faster
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* than the minimum of {@link #getFastestInterval} and
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* {@link #getInterval}.
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*
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* @return fastest interval in milliseconds, exact
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*/
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public long getFastestInterval() {
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return mFastestInterval;
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}
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/**
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* Set the duration of this request, in milliseconds.
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*
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* <p>The duration begins immediately (and not when the request
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* is passed to the location manager), so call this method again
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* if the request is re-used at a later time.
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*
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* <p>The location manager will automatically stop updates after
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* the request expires.
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*
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* <p>The duration includes suspend time. Values less than 0
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* are allowed, but indicate that the request has already expired.
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*
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* @param millis duration of request in milliseconds
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setExpireIn(long millis) {
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long elapsedRealtime = SystemClock.elapsedRealtime();
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// Check for > Long.MAX_VALUE overflow (elapsedRealtime > 0):
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if (millis > Long.MAX_VALUE - elapsedRealtime) {
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mExpireAt = Long.MAX_VALUE;
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} else {
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mExpireAt = millis + elapsedRealtime;
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}
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if (mExpireAt < 0) mExpireAt = 0;
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return this;
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}
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/**
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* Set the request expiration time, in millisecond since boot.
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*
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* <p>This expiration time uses the same time base as {@link SystemClock#elapsedRealtime}.
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*
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* <p>The location manager will automatically stop updates after
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* the request expires.
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*
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* <p>The duration includes suspend time. Values before {@link SystemClock#elapsedRealtime}
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* are allowed, but indicate that the request has already expired.
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*
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* @param millis expiration time of request, in milliseconds since boot including suspend
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setExpireAt(long millis) {
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mExpireAt = millis;
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if (mExpireAt < 0) mExpireAt = 0;
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return this;
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}
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/**
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* Get the request expiration time, in milliseconds since boot.
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*
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* <p>This value can be compared to {@link SystemClock#elapsedRealtime} to determine
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* the time until expiration.
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*
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* @return expiration time of request, in milliseconds since boot including suspend
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*/
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public long getExpireAt() {
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return mExpireAt;
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}
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/**
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* Set the number of location updates.
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*
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* <p>By default locations are continuously updated until the request is explicitly
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* removed, however you can optionally request a set number of updates.
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* For example, if your application only needs a single fresh location,
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* then call this method with a value of 1 before passing the request
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* to the location manager.
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*
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* @param numUpdates the number of location updates requested
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* @throws InvalidArgumentException if numUpdates is 0 or less
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* @return the same object, so that setters can be chained
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*/
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public LocationRequest setNumUpdates(int numUpdates) {
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if (numUpdates <= 0) throw new IllegalArgumentException("invalid numUpdates: " + numUpdates);
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mNumUpdates = numUpdates;
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return this;
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}
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/**
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* Get the number of updates requested.
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*
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* <p>By default this is {@link Integer#MAX_VALUE}, which indicates that
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* locations are updated until the request is explicitly removed.
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* @return number of updates
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*/
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public int getNumUpdates() {
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return mNumUpdates;
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}
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/** @hide */
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public void decrementNumUpdates() {
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if (mNumUpdates != Integer.MAX_VALUE) {
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mNumUpdates--;
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}
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if (mNumUpdates < 0) {
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mNumUpdates = 0;
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}
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}
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/** @hide */
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@SystemApi
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public LocationRequest setProvider(String provider) {
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checkProvider(provider);
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mProvider = provider;
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return this;
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}
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/** @hide */
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@SystemApi
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public String getProvider() {
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return mProvider;
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}
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/** @hide */
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@SystemApi
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public LocationRequest setSmallestDisplacement(float meters) {
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checkDisplacement(meters);
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mSmallestDisplacement = meters;
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return this;
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}
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/** @hide */
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@SystemApi
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public float getSmallestDisplacement() {
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return mSmallestDisplacement;
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}
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/**
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* Sets the WorkSource to use for power blaming of this location request.
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*
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* <p>No permissions are required to make this call, however the LocationManager
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* will throw a SecurityException when requesting location updates if the caller
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* doesn't have the {@link android.Manifest.permission#UPDATE_DEVICE_STATS} permission.
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*
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* @param workSource WorkSource defining power blame for this location request.
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* @hide
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*/
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@SystemApi
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public void setWorkSource(WorkSource workSource) {
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mWorkSource = workSource;
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}
|
|
|
|
/** @hide */
|
|
@SystemApi
|
|
public WorkSource getWorkSource() {
|
|
return mWorkSource;
|
|
}
|
|
|
|
/**
|
|
* Sets whether or not this location request should be hidden from AppOps.
|
|
*
|
|
* <p>Hiding a location request from AppOps will remove user visibility in the UI as to this
|
|
* request's existence. It does not affect power blaming in the Battery page.
|
|
*
|
|
* <p>No permissions are required to make this call, however the LocationManager
|
|
* will throw a SecurityException when requesting location updates if the caller
|
|
* doesn't have the {@link android.Manifest.permission#UPDATE_APP_OPS_STATS} permission.
|
|
*
|
|
* @param hideFromAppOps If true AppOps won't keep track of this location request.
|
|
* @see android.app.AppOpsManager
|
|
* @hide
|
|
*/
|
|
@SystemApi
|
|
public void setHideFromAppOps(boolean hideFromAppOps) {
|
|
mHideFromAppOps = hideFromAppOps;
|
|
}
|
|
|
|
/** @hide */
|
|
@SystemApi
|
|
public boolean getHideFromAppOps() {
|
|
return mHideFromAppOps;
|
|
}
|
|
|
|
private static void checkInterval(long millis) {
|
|
if (millis < 0) {
|
|
throw new IllegalArgumentException("invalid interval: " + millis);
|
|
}
|
|
}
|
|
|
|
private static void checkQuality(int quality) {
|
|
switch (quality) {
|
|
case ACCURACY_FINE:
|
|
case ACCURACY_BLOCK:
|
|
case ACCURACY_CITY:
|
|
case POWER_NONE:
|
|
case POWER_LOW:
|
|
case POWER_HIGH:
|
|
break;
|
|
default:
|
|
throw new IllegalArgumentException("invalid quality: " + quality);
|
|
}
|
|
}
|
|
|
|
private static void checkDisplacement(float meters) {
|
|
if (meters < 0.0f) {
|
|
throw new IllegalArgumentException("invalid displacement: " + meters);
|
|
}
|
|
}
|
|
|
|
private static void checkProvider(String name) {
|
|
if (name == null) {
|
|
throw new IllegalArgumentException("invalid provider: " + name);
|
|
}
|
|
}
|
|
|
|
public static final Parcelable.Creator<LocationRequest> CREATOR =
|
|
new Parcelable.Creator<LocationRequest>() {
|
|
@Override
|
|
public LocationRequest createFromParcel(Parcel in) {
|
|
LocationRequest request = new LocationRequest();
|
|
request.setQuality(in.readInt());
|
|
request.setFastestInterval(in.readLong());
|
|
request.setInterval(in.readLong());
|
|
request.setExpireAt(in.readLong());
|
|
request.setNumUpdates(in.readInt());
|
|
request.setSmallestDisplacement(in.readFloat());
|
|
request.setHideFromAppOps(in.readInt() != 0);
|
|
String provider = in.readString();
|
|
if (provider != null) request.setProvider(provider);
|
|
WorkSource workSource = in.readParcelable(null);
|
|
if (workSource != null) request.setWorkSource(workSource);
|
|
return request;
|
|
}
|
|
@Override
|
|
public LocationRequest[] newArray(int size) {
|
|
return new LocationRequest[size];
|
|
}
|
|
};
|
|
|
|
@Override
|
|
public int describeContents() {
|
|
return 0;
|
|
}
|
|
|
|
@Override
|
|
public void writeToParcel(Parcel parcel, int flags) {
|
|
parcel.writeInt(mQuality);
|
|
parcel.writeLong(mFastestInterval);
|
|
parcel.writeLong(mInterval);
|
|
parcel.writeLong(mExpireAt);
|
|
parcel.writeInt(mNumUpdates);
|
|
parcel.writeFloat(mSmallestDisplacement);
|
|
parcel.writeInt(mHideFromAppOps ? 1 : 0);
|
|
parcel.writeString(mProvider);
|
|
parcel.writeParcelable(mWorkSource, 0);
|
|
}
|
|
|
|
/** @hide */
|
|
public static String qualityToString(int quality) {
|
|
switch (quality) {
|
|
case ACCURACY_FINE:
|
|
return "ACCURACY_FINE";
|
|
case ACCURACY_BLOCK:
|
|
return "ACCURACY_BLOCK";
|
|
case ACCURACY_CITY:
|
|
return "ACCURACY_CITY";
|
|
case POWER_NONE:
|
|
return "POWER_NONE";
|
|
case POWER_LOW:
|
|
return "POWER_LOW";
|
|
case POWER_HIGH:
|
|
return "POWER_HIGH";
|
|
default:
|
|
return "???";
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
StringBuilder s = new StringBuilder();
|
|
s.append("Request[").append(qualityToString(mQuality));
|
|
if (mProvider != null) s.append(' ').append(mProvider);
|
|
if (mQuality != POWER_NONE) {
|
|
s.append(" requested=");
|
|
TimeUtils.formatDuration(mInterval, s);
|
|
}
|
|
s.append(" fastest=");
|
|
TimeUtils.formatDuration(mFastestInterval, s);
|
|
if (mExpireAt != Long.MAX_VALUE) {
|
|
long expireIn = mExpireAt - SystemClock.elapsedRealtime();
|
|
s.append(" expireIn=");
|
|
TimeUtils.formatDuration(expireIn, s);
|
|
}
|
|
if (mNumUpdates != Integer.MAX_VALUE){
|
|
s.append(" num=").append(mNumUpdates);
|
|
}
|
|
s.append(']');
|
|
return s.toString();
|
|
}
|
|
}
|