1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.phone; 18 19 import android.content.Context; 20 import android.provider.Settings; 21 import android.util.Log; 22 23 import com.android.internal.telephony.Phone; 24 25 /** 26 * TODO: This is intended as a temporary repository for behavior policy 27 * functions that depend upon the type of phone or the carrier. Ultimately 28 * these sorts of questions should be answered by the telephony layer. 29 */ 30 public class TelephonyCapabilities { 31 private static final String LOG_TAG = "TelephonyCapabilities"; 32 33 /** This class is never instantiated. */ 34 private TelephonyCapabilities() { 35 } 36 37 /** 38 * On GSM devices, we never use short tones. 39 * On CDMA devices, it depends upon the settings. 40 * TODO: I don't think this has anything to do with GSM versus CDMA, 41 * should we be looking only at the setting? 42 */ 43 /* package */ static boolean useShortDtmfTones(Phone phone, Context context) { 44 int phoneType = phone.getPhoneType(); 45 if (phoneType == Phone.PHONE_TYPE_GSM) { 46 return false; 47 } else if (phoneType == Phone.PHONE_TYPE_CDMA) { 48 int toneType = android.provider.Settings.System.getInt( 49 context.getContentResolver(), 50 Settings.System.DTMF_TONE_TYPE_WHEN_DIALING, 51 CallFeaturesSetting.DTMF_TONE_TYPE_NORMAL); 52 if (toneType == CallFeaturesSetting.DTMF_TONE_TYPE_NORMAL) { 53 return true; 54 } else { 55 return false; 56 } 57 } else if (phoneType == Phone.PHONE_TYPE_SIP) { 58 return false; 59 } else { 60 throw new IllegalStateException("Unexpected phone type: " + phoneType); 61 } 62 } 63 64 /** 65 * Return true if the current phone supports ECM ("Emergency Callback 66 * Mode"), which is a feature where the device goes into a special 67 * state for a short period of time after making an outgoing emergency 68 * call. 69 * 70 * (On current devices, that state lasts 5 minutes. It prevents data 71 * usage by other apps, to avoid conflicts with any possible incoming 72 * calls. It also puts up a notification in the status bar, showing a 73 * countdown while ECM is active, and allowing the user to exit ECM.) 74 * 75 * Currently this is assumed to be true for CDMA phones, and false 76 * otherwise. 77 * 78 * TODO: This capability should really be exposed by the telephony 79 * layer, since it depends on the underlying telephony technology. 80 * (Or, is this actually carrier-specific? Is it VZW-only?) 81 */ 82 /* package */ static boolean supportsEcm(Phone phone) { 83 return (phone.getPhoneType() == Phone.PHONE_TYPE_CDMA); 84 } 85 86 /** 87 * Return true if the current phone supports Over The Air Service 88 * Provisioning (OTASP) 89 * 90 * Currently this is assumed to be true for CDMA phones, and false 91 * otherwise. 92 * 93 * TODO: This capability should really be exposed by the telephony 94 * layer, since it depends on the underlying telephony technology. 95 * 96 * TODO: Watch out: this is also highly carrier-specific, since the 97 * OTA procedure is different from one carrier to the next, *and* the 98 * different carriers may want very different onscreen UI as well. 99 * The procedure may even be different for different devices with the 100 * same carrier. 101 * 102 * So we eventually will need a much more flexible, pluggable design. 103 * This method here is just a placeholder to reduce hardcoded 104 * "if (CDMA)" checks sprinkled throughout the rest of the phone app. 105 * 106 * TODO: consider using the term "OTASP" rather "OTA" everywhere in the 107 * phone app, since OTA can also mean over-the-air software updates. 108 */ 109 /* package */ static boolean supportsOtasp(Phone phone) { 110 return (phone.getPhoneType() == Phone.PHONE_TYPE_CDMA); 111 } 112 113 /** 114 * Return true if the current phone can retrieve the voice message count. 115 * 116 * Currently this is assumed to be true on CDMA phones and false otherwise. 117 * 118 * TODO: This capability should really be exposed by the telephony 119 * layer, since it depends on the underlying telephony technology. 120 */ 121 /* package */ static boolean supportsVoiceMessageCount(Phone phone) { 122 return (phone.getPhoneType() == Phone.PHONE_TYPE_CDMA); 123 } 124 125 /** 126 * Return true if this phone allows the user to select which 127 * network to use. 128 * 129 * Currently this is assumed to be true only on GSM phones. 130 * 131 * TODO: Should CDMA phones allow this as well? 132 */ 133 /* package */ static boolean supportsNetworkSelection(Phone phone) { 134 return (phone.getPhoneType() == Phone.PHONE_TYPE_GSM); 135 } 136 137 /** 138 * Returns a resource ID for a label to use when displaying the 139 * "device id" of the current device. (This is currently used as the 140 * title of the "device id" dialog.) 141 * 142 * This is specific to the device's telephony technology: the device 143 * id is called "IMEI" on GSM phones and "MEID" on CDMA phones. 144 * TODO: ultimately this name should come directly from the 145 * telephony layer. 146 */ 147 /* package */ static int getDeviceIdLabel(Phone phone) { 148 if (phone.getPhoneType() == Phone.PHONE_TYPE_GSM) { 149 return R.string.imei; 150 } else if (phone.getPhoneType() == Phone.PHONE_TYPE_CDMA) { 151 return R.string.meid; 152 } else { 153 Log.w(LOG_TAG, "getDeviceIdLabel: no known label for phone " 154 + phone.getPhoneName()); 155 return 0; 156 } 157 } 158 159 /** 160 * Return true if the current phone supports the ability to explicitly 161 * manage the state of a conference call (i.e. view the participants, 162 * and hangup or separate individual callers.) 163 * 164 * The in-call screen's "Manage conference" UI is available only on 165 * devices that support this feature. 166 * 167 * Currently this is assumed to be true on GSM phones and false otherwise. 168 * TODO: This capability should really be exposed by the telephony 169 * layer, since it depends on the underlying telephony technology. 170 */ 171 /* package */ static boolean supportsConferenceCallManagement(Phone phone) { 172 return ((phone.getPhoneType() == Phone.PHONE_TYPE_GSM) 173 || (phone.getPhoneType() == Phone.PHONE_TYPE_SIP)); 174 } 175 176 /** 177 * Return true if the current phone supports explicit "Hold" and 178 * "Unhold" actions for an active call. (If so, the in-call UI will 179 * provide onscreen "Hold" / "Unhold" buttons.) 180 * 181 * Currently this is assumed to be true on GSM phones and false 182 * otherwise. (In particular, CDMA has no concept of "putting a call 183 * on hold.") 184 * TODO: This capability should really be exposed by the telephony 185 * layer, since it depends on the underlying telephony technology. 186 */ 187 /* package */ static boolean supportsHoldAndUnhold(Phone phone) { 188 return ((phone.getPhoneType() == Phone.PHONE_TYPE_GSM) 189 || (phone.getPhoneType() == Phone.PHONE_TYPE_SIP)); 190 } 191 192 /** 193 * Return true if the current phone supports distinct "Answer & Hold" 194 * and "Answer & End" behaviors in the call-waiting scenario. If so, 195 * the in-call UI may provide separate buttons or menu items for these 196 * two actions. 197 * 198 * Currently this is assumed to be true on GSM phones and false 199 * otherwise. (In particular, CDMA has no concept of explicitly 200 * managing the background call, or "putting a call on hold.") 201 * 202 * TODO: This capability should really be exposed by the telephony 203 * layer, since it depends on the underlying telephony technology. 204 * 205 * TODO: It might be better to expose this capability in a more 206 * generic form, like maybe "supportsExplicitMultipleLineManagement()" 207 * rather than focusing specifically on call-waiting behavior. 208 */ 209 /* package */ static boolean supportsAnswerAndHold(Phone phone) { 210 return ((phone.getPhoneType() == Phone.PHONE_TYPE_GSM) 211 || (phone.getPhoneType() == Phone.PHONE_TYPE_SIP)); 212 } 213 } 214
