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/*
* Copyright (C) 2014 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 com.android.server.telecom;
import android.content.ContentResolver;
import android.provider.Settings;
/**
* A helper class which serves only to make it easier to lookup timeout values. This class should
* never be instantiated, and only accessed through the {@link #get(String, long)} method.
*
* These methods are safe to call from any thread, including the UI thread.
*/
public final class Timeouts {
/** A prefix to use for all keys so to not clobber the global namespace. */
private static final String PREFIX = "telecom.";
private Timeouts() {}
/**
* Returns the timeout value from Settings or the default value if it hasn't been changed. This
* method is safe to call from any thread, including the UI thread.
*
* @param contentResolver The content resolved.
* @param key Settings key to retrieve.
* @param defaultValue Default value, in milliseconds.
* @return The timeout value from Settings or the default value if it hasn't been changed.
*/
private static long get(ContentResolver contentResolver, String key, long defaultValue) {
return Settings.Secure.getLong(contentResolver, PREFIX + key, defaultValue);
}
/**
* Returns the longest period, in milliseconds, to wait for the query for direct-to-voicemail
* to complete. If the query goes beyond this timeout, the incoming call screen is shown to the
* user.
*/
public static long getDirectToVoicemailMillis(ContentResolver contentResolver) {
return get(contentResolver, "direct_to_voicemail_ms", 500L);
}
/**
* Returns the amount of time to wait before disconnecting a call that was canceled via
* NEW_OUTGOING_CALL broadcast. This timeout allows apps which repost the call using a gateway
* to reuse the existing call, preventing the call from causing a start->end->start jank in the
* in-call UI.
*/
public static long getNewOutgoingCallCancelMillis(ContentResolver contentResolver) {
return get(contentResolver, "new_outgoing_call_cancel_ms", 400L);
}
/**
* Returns the amount of time to play each DTMF tone after post dial continue.
* This timeout allows the current tone to play for a certain amount of time before either being
* interrupted by the next tone or terminated.
*/
public static long getDelayBetweenDtmfTonesMillis(ContentResolver contentResolver) {
return get(contentResolver, "delay_between_dtmf_tones_ms", 300L);
}
/**
* Returns the amount of time to wait for an emergency call to be placed before routing to
* a different call service. A value of 0 or less means no timeout should be used.
*/
public static long getEmergencyCallTimeoutMillis(ContentResolver contentResolver) {
return get(contentResolver, "emergency_call_timeout_millis", 25000L /* 25 seconds */);
}
/**
* Returns the amount of time to wait for an emergency call to be placed before routing to
* a different call service. This timeout is used only when the radio is powered off (for
* example in airplane mode). A value of 0 or less means no timeout should be used.
*/
public static long getEmergencyCallTimeoutRadioOffMillis(ContentResolver contentResolver) {
return get(contentResolver, "emergency_call_timeout_radio_off_millis",
60000L /* 1 minute */);
}
/**
* Returns the amount of delay before unbinding the in-call services after all the calls
* are removed.
*/
public static long getCallRemoveUnbindInCallServicesDelay(ContentResolver contentResolver) {
return get(contentResolver, "call_remove_unbind_in_call_services_delay",
2000L /* 2 seconds */);
}
/**
* Returns the amount of time for which bluetooth is considered connected after requesting
* connection. This compensates for the amount of time it takes for the audio route to
* actually change to bluetooth.
*/
public static long getBluetoothPendingTimeoutMillis(ContentResolver contentResolver) {
return get(contentResolver, "bluetooth_pending_timeout_millis", 5000L);
}
}
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