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/*
* 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);
}
}
}
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