38389b6cf7
This takes the easy way around notifying the correct users about GPS state transitions by notifying ALL the users(!). I've also laid groundwork for proper multiuser support in LocationManager and did a tiny bit of cleanup in GpsNetInitiatedHandler while I was looking at notifications. Bug: 7213552 Change-Id: I2d6dc65c459e55d110ac0f5f79ae7a87ad638ede
426 lines
15 KiB
Java
Executable File
426 lines
15 KiB
Java
Executable File
/*
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* Copyright (C) 2008 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 com.android.internal.location;
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import java.io.UnsupportedEncodingException;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.Context;
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import android.content.Intent;
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import android.location.LocationManager;
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import android.os.Bundle;
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import android.os.RemoteException;
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import android.os.UserHandle;
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import android.util.Log;
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import com.android.internal.R;
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import com.android.internal.telephony.GsmAlphabet;
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/**
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* A GPS Network-initiated Handler class used by LocationManager.
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*
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* {@hide}
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*/
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public class GpsNetInitiatedHandler {
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private static final String TAG = "GpsNetInitiatedHandler";
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private static final boolean DEBUG = true;
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private static final boolean VERBOSE = false;
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// NI verify activity for bringing up UI (not used yet)
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public static final String ACTION_NI_VERIFY = "android.intent.action.NETWORK_INITIATED_VERIFY";
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// string constants for defining data fields in NI Intent
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public static final String NI_INTENT_KEY_NOTIF_ID = "notif_id";
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public static final String NI_INTENT_KEY_TITLE = "title";
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public static final String NI_INTENT_KEY_MESSAGE = "message";
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public static final String NI_INTENT_KEY_TIMEOUT = "timeout";
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public static final String NI_INTENT_KEY_DEFAULT_RESPONSE = "default_resp";
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// the extra command to send NI response to GpsLocationProvider
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public static final String NI_RESPONSE_EXTRA_CMD = "send_ni_response";
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// the extra command parameter names in the Bundle
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public static final String NI_EXTRA_CMD_NOTIF_ID = "notif_id";
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public static final String NI_EXTRA_CMD_RESPONSE = "response";
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// these need to match GpsNiType constants in gps_ni.h
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public static final int GPS_NI_TYPE_VOICE = 1;
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public static final int GPS_NI_TYPE_UMTS_SUPL = 2;
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public static final int GPS_NI_TYPE_UMTS_CTRL_PLANE = 3;
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// these need to match GpsUserResponseType constants in gps_ni.h
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public static final int GPS_NI_RESPONSE_ACCEPT = 1;
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public static final int GPS_NI_RESPONSE_DENY = 2;
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public static final int GPS_NI_RESPONSE_NORESP = 3;
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// these need to match GpsNiNotifyFlags constants in gps_ni.h
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public static final int GPS_NI_NEED_NOTIFY = 0x0001;
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public static final int GPS_NI_NEED_VERIFY = 0x0002;
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public static final int GPS_NI_PRIVACY_OVERRIDE = 0x0004;
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// these need to match GpsNiEncodingType in gps_ni.h
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public static final int GPS_ENC_NONE = 0;
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public static final int GPS_ENC_SUPL_GSM_DEFAULT = 1;
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public static final int GPS_ENC_SUPL_UTF8 = 2;
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public static final int GPS_ENC_SUPL_UCS2 = 3;
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public static final int GPS_ENC_UNKNOWN = -1;
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private final Context mContext;
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// parent gps location provider
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private final LocationManager mLocationManager;
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// configuration of notificaiton behavior
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private boolean mPlaySounds = false;
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private boolean mPopupImmediately = true;
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// Set to true if string from HAL is encoded as Hex, e.g., "3F0039"
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static private boolean mIsHexInput = true;
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public static class GpsNiNotification
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{
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public int notificationId;
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public int niType;
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public boolean needNotify;
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public boolean needVerify;
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public boolean privacyOverride;
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public int timeout;
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public int defaultResponse;
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public String requestorId;
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public String text;
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public int requestorIdEncoding;
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public int textEncoding;
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public Bundle extras;
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};
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public static class GpsNiResponse {
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/* User reponse, one of the values in GpsUserResponseType */
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int userResponse;
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/* Optional extra data to pass with the user response */
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Bundle extras;
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};
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/**
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* The notification that is shown when a network-initiated notification
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* (and verification) event is received.
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* <p>
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* This is lazily created, so use {@link #setNINotification()}.
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*/
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private Notification mNiNotification;
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public GpsNetInitiatedHandler(Context context) {
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mContext = context;
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mLocationManager = (LocationManager)context.getSystemService(Context.LOCATION_SERVICE);
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}
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// Handles NI events from HAL
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public void handleNiNotification(GpsNiNotification notif)
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{
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if (DEBUG) Log.d(TAG, "handleNiNotification" + " notificationId: " + notif.notificationId
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+ " requestorId: " + notif.requestorId + " text: " + notif.text);
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// Notify and verify with immediate pop-up
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if (notif.needNotify && notif.needVerify && mPopupImmediately)
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{
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// Popup the dialog box now
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openNiDialog(notif);
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}
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// Notify only, or delayed pop-up (change mPopupImmediately to FALSE)
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if (notif.needNotify && !notif.needVerify ||
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notif.needNotify && notif.needVerify && !mPopupImmediately)
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{
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// Show the notification
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// if mPopupImmediately == FALSE and needVerify == TRUE, a dialog will be opened
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// when the user opens the notification message
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setNiNotification(notif);
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}
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// ACCEPT cases: 1. Notify, no verify; 2. no notify, no verify; 3. privacy override.
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if ( notif.needNotify && !notif.needVerify ||
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!notif.needNotify && !notif.needVerify ||
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notif.privacyOverride)
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{
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mLocationManager.sendNiResponse(notif.notificationId, GPS_NI_RESPONSE_ACCEPT);
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}
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//////////////////////////////////////////////////////////////////////////
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// A note about timeout
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// According to the protocol, in the need_notify and need_verify case,
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// a default response should be sent when time out.
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//
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// In some GPS hardware, the GPS driver (under HAL) can handle the timeout case
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// and this class GpsNetInitiatedHandler does not need to do anything.
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//
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// However, the UI should at least close the dialog when timeout. Further,
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// for more general handling, timeout response should be added to the Handler here.
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//
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}
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// Sets the NI notification.
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private synchronized void setNiNotification(GpsNiNotification notif) {
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NotificationManager notificationManager = (NotificationManager) mContext
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.getSystemService(Context.NOTIFICATION_SERVICE);
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if (notificationManager == null) {
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return;
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}
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String title = getNotifTitle(notif, mContext);
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String message = getNotifMessage(notif, mContext);
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if (DEBUG) Log.d(TAG, "setNiNotification, notifyId: " + notif.notificationId +
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", title: " + title +
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", message: " + message);
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// Construct Notification
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if (mNiNotification == null) {
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mNiNotification = new Notification();
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mNiNotification.icon = com.android.internal.R.drawable.stat_sys_gps_on; /* Change notification icon here */
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mNiNotification.when = 0;
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}
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if (mPlaySounds) {
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mNiNotification.defaults |= Notification.DEFAULT_SOUND;
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} else {
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mNiNotification.defaults &= ~Notification.DEFAULT_SOUND;
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}
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mNiNotification.flags = Notification.FLAG_ONGOING_EVENT | Notification.FLAG_AUTO_CANCEL;
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mNiNotification.tickerText = getNotifTicker(notif, mContext);
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// if not to popup dialog immediately, pending intent will open the dialog
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Intent intent = !mPopupImmediately ? getDlgIntent(notif) : new Intent();
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PendingIntent pi = PendingIntent.getBroadcast(mContext, 0, intent, 0);
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mNiNotification.setLatestEventInfo(mContext, title, message, pi);
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notificationManager.notifyAsUser(null, notif.notificationId, mNiNotification,
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UserHandle.ALL);
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}
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// Opens the notification dialog and waits for user input
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private void openNiDialog(GpsNiNotification notif)
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{
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Intent intent = getDlgIntent(notif);
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if (DEBUG) Log.d(TAG, "openNiDialog, notifyId: " + notif.notificationId +
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", requestorId: " + notif.requestorId +
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", text: " + notif.text);
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mContext.startActivity(intent);
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}
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// Construct the intent for bringing up the dialog activity, which shows the
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// notification and takes user input
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private Intent getDlgIntent(GpsNiNotification notif)
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{
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Intent intent = new Intent();
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String title = getDialogTitle(notif, mContext);
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String message = getDialogMessage(notif, mContext);
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// directly bring up the NI activity
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intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
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intent.setClass(mContext, com.android.internal.app.NetInitiatedActivity.class);
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// put data in the intent
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intent.putExtra(NI_INTENT_KEY_NOTIF_ID, notif.notificationId);
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intent.putExtra(NI_INTENT_KEY_TITLE, title);
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intent.putExtra(NI_INTENT_KEY_MESSAGE, message);
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intent.putExtra(NI_INTENT_KEY_TIMEOUT, notif.timeout);
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intent.putExtra(NI_INTENT_KEY_DEFAULT_RESPONSE, notif.defaultResponse);
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if (DEBUG) Log.d(TAG, "generateIntent, title: " + title + ", message: " + message +
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", timeout: " + notif.timeout);
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return intent;
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}
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// Converts a string (or Hex string) to a char array
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static byte[] stringToByteArray(String original, boolean isHex)
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{
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int length = isHex ? original.length() / 2 : original.length();
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byte[] output = new byte[length];
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int i;
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if (isHex)
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{
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for (i = 0; i < length; i++)
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{
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output[i] = (byte) Integer.parseInt(original.substring(i*2, i*2+2), 16);
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}
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}
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else {
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for (i = 0; i < length; i++)
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{
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output[i] = (byte) original.charAt(i);
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}
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}
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return output;
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}
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/**
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* Unpacks an byte array containing 7-bit packed characters into a String.
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*
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* @param input a 7-bit packed char array
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* @return the unpacked String
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*/
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static String decodeGSMPackedString(byte[] input)
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{
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final char PADDING_CHAR = 0x00;
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int lengthBytes = input.length;
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int lengthSeptets = (lengthBytes * 8) / 7;
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String decoded;
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/* Special case where the last 7 bits in the last byte could hold a valid
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* 7-bit character or a padding character. Drop the last 7-bit character
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* if it is a padding character.
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*/
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if (lengthBytes % 7 == 0) {
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if (lengthBytes > 0) {
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if ((input[lengthBytes - 1] >> 1) == PADDING_CHAR) {
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lengthSeptets = lengthSeptets - 1;
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}
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}
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}
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decoded = GsmAlphabet.gsm7BitPackedToString(input, 0, lengthSeptets);
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// Return "" if decoding of GSM packed string fails
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if (null == decoded) {
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Log.e(TAG, "Decoding of GSM packed string failed");
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decoded = "";
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}
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return decoded;
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}
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static String decodeUTF8String(byte[] input)
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{
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String decoded = "";
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try {
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decoded = new String(input, "UTF-8");
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}
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catch (UnsupportedEncodingException e)
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{
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throw new AssertionError();
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}
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return decoded;
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}
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static String decodeUCS2String(byte[] input)
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{
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String decoded = "";
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try {
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decoded = new String(input, "UTF-16");
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}
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catch (UnsupportedEncodingException e)
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{
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throw new AssertionError();
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}
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return decoded;
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}
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/** Decode NI string
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*
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* @param original The text string to be decoded
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* @param isHex Specifies whether the content of the string has been encoded as a Hex string. Encoding
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* a string as Hex can allow zeros inside the coded text.
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* @param coding Specifies the coding scheme of the string, such as GSM, UTF8, UCS2, etc. This coding scheme
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* needs to match those used passed to HAL from the native GPS driver. Decoding is done according
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* to the <code> coding </code>, after a Hex string is decoded. Generally, if the
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* notification strings don't need further decoding, <code> coding </code> encoding can be
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* set to -1, and <code> isHex </code> can be false.
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* @return the decoded string
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*/
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static private String decodeString(String original, boolean isHex, int coding)
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{
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String decoded = original;
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byte[] input = stringToByteArray(original, isHex);
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switch (coding) {
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case GPS_ENC_NONE:
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decoded = original;
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break;
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case GPS_ENC_SUPL_GSM_DEFAULT:
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decoded = decodeGSMPackedString(input);
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break;
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case GPS_ENC_SUPL_UTF8:
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decoded = decodeUTF8String(input);
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break;
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case GPS_ENC_SUPL_UCS2:
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decoded = decodeUCS2String(input);
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break;
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case GPS_ENC_UNKNOWN:
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decoded = original;
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break;
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default:
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Log.e(TAG, "Unknown encoding " + coding + " for NI text " + original);
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break;
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}
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return decoded;
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}
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// change this to configure notification display
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static private String getNotifTicker(GpsNiNotification notif, Context context)
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{
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String ticker = String.format(context.getString(R.string.gpsNotifTicker),
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decodeString(notif.requestorId, mIsHexInput, notif.requestorIdEncoding),
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decodeString(notif.text, mIsHexInput, notif.textEncoding));
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return ticker;
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}
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// change this to configure notification display
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static private String getNotifTitle(GpsNiNotification notif, Context context)
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{
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String title = String.format(context.getString(R.string.gpsNotifTitle));
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return title;
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}
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// change this to configure notification display
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static private String getNotifMessage(GpsNiNotification notif, Context context)
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{
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String message = String.format(context.getString(R.string.gpsNotifMessage),
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decodeString(notif.requestorId, mIsHexInput, notif.requestorIdEncoding),
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decodeString(notif.text, mIsHexInput, notif.textEncoding));
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return message;
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}
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// change this to configure dialog display (for verification)
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static public String getDialogTitle(GpsNiNotification notif, Context context)
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{
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return getNotifTitle(notif, context);
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}
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// change this to configure dialog display (for verification)
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static private String getDialogMessage(GpsNiNotification notif, Context context)
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{
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return getNotifMessage(notif, context);
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}
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}
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