| /* |
| * Copyright (C) 2010 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.location; |
| |
| import android.content.Context; |
| import android.location.Country; |
| import android.location.CountryListener; |
| import android.os.Handler; |
| |
| /** |
| * This class defines the methods need to be implemented by the country |
| * detector. |
| * <p> |
| * Calling {@link #detectCountry} to start detecting the country. The country |
| * could be returned immediately if it is available. |
| * |
| * @hide |
| */ |
| public abstract class CountryDetectorBase { |
| protected final Handler mHandler; |
| protected final Context mContext; |
| protected CountryListener mListener; |
| protected Country mDetectedCountry; |
| |
| public CountryDetectorBase(Context ctx) { |
| mContext = ctx; |
| mHandler = new Handler(); |
| } |
| |
| /** |
| * Start detecting the country that the user is in. |
| * |
| * @return the country if it is available immediately, otherwise null should |
| * be returned. |
| */ |
| public abstract Country detectCountry(); |
| |
| /** |
| * Register a listener to receive the notification when the country is detected or changed. |
| * <p> |
| * The previous listener will be replaced if it exists. |
| */ |
| public void setCountryListener(CountryListener listener) { |
| mListener = listener; |
| } |
| |
| /** |
| * Stop detecting the country. The detector should release all system services and be ready to |
| * be freed |
| */ |
| public abstract void stop(); |
| |
| protected void notifyListener(Country country) { |
| if (mListener != null) { |
| mListener.onCountryDetected(country); |
| } |
| } |
| } |