com.libresoft.apps.ARviewer.Utils.GeoNames.AltitudeManager.java Source code

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Here is the source code for com.libresoft.apps.ARviewer.Utils.GeoNames.AltitudeManager.java

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/*
 *
 *  Copyright (C) 2010 GSyC/LibreSoft, Universidad Rey Juan Carlos.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/. 
 *
 *  Author : Ral Romn Lpez <rroman@gsyc.es>
 *
 */

package com.libresoft.apps.ARviewer.Utils.GeoNames;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import com.libresoft.apps.ARviewer.ARGeoNode;
import com.libresoft.sdk.ARviewer.Types.GeoNode;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;

public class AltitudeManager {
    public static final double NO_ALTITUDE_VALUE = -10000;

    public static final String NO_HEIGHTS = "No_heights";
    public static final String EXISTING_HEIGHTS = "Existing_heights";
    public static final String ALL_HEIGHTS = "All_heights";

    private static final String URL = "http://ws.geonames.org/astergdem";
    private static final String URL_B = "http://www.geonames.org/gtopo30";

    public static double getAltitudeFromLatLong(float latitude, float longitude) {
        double altitude = AltitudeManager.NO_ALTITUDE_VALUE;

        String data = "?lat=" + Float.toString(latitude) + "&lng=" + Float.toString(longitude);

        try {//Aster
            DefaultHttpClient httpclient = new DefaultHttpClient();

            HttpGet httpGet = new HttpGet(URL + data);

            HttpResponse response = httpclient.execute(httpGet);

            HttpEntity entity = response.getEntity();

            String str = convertStreamToString(entity.getContent());

            Log.d("GeoNames: ", str);

            altitude = Double.parseDouble(str);

            if (altitude < 0)
                altitude = 0;

            return altitude;

        } catch (Exception e) {
            Log.e("GeoNames: ", e.getMessage());
            return emergencyService(data);
        }
    }

    private static double emergencyService(String data) {
        double altitude = AltitudeManager.NO_ALTITUDE_VALUE;
        try {//Gtopo30
            DefaultHttpClient httpclient = new DefaultHttpClient();

            HttpGet httpGet = new HttpGet(URL_B + data);

            HttpResponse response = httpclient.execute(httpGet);

            HttpEntity entity = response.getEntity();

            String str = convertStreamToString(entity.getContent());

            Log.d("GeoNames: ", str);

            altitude = Double.parseDouble(str);

            if (altitude < 0)
                altitude = 0;

            return altitude;

        } catch (Exception e) {
            Log.e("GeoNames: ", e.getMessage());
            return AltitudeManager.NO_ALTITUDE_VALUE;
        }

    }

    private static String convertStreamToString(InputStream is) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is), 8 * 1024);
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return sb.toString();

    }

    public static double getAbsoluteAltitude(Context context, double base_altitude, boolean is_floor) {
        double altitude = AltitudeManager.NO_ALTITUDE_VALUE;

        if (base_altitude != AltitudeManager.NO_ALTITUDE_VALUE) {
            try {
                SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);

                float user_height = ((float) sharedPreferences.getInt(AltitudePreferences.KEY_USER_HEIGHT, 175))
                        / 100;

                if (is_floor && sharedPreferences.getBoolean(AltitudePreferences.KEY_USE_FLOOR, false)) {
                    int floor_number = sharedPreferences.getInt(AltitudePreferences.KEY_FLOOR, 0);

                    altitude = (float) (base_altitude + user_height + floor_number * 3); // 3 meters per room
                    Log.d("AltitudeManager", "Using floor");
                } else
                    altitude = (float) (base_altitude + user_height);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                Log.e("AltitudeManager", e.toString());
            }
        }

        return altitude;
    }

    public static void updateHeights(ArrayList<ARGeoNode> resources_list) {
        if (resources_list == null)
            return;
        int length = resources_list.size();
        for (int i = (length - 1); i > -1; i--) {
            GeoNode resource = resources_list.get(i).getGeoNode();
            if (resource.getAltitude() == NO_ALTITUDE_VALUE)
                resource.setAltitude((float) getAltitudeFromLatLong((float) (double) resource.getLatitude(),
                        (float) (double) resource.getLongitude()));
        }
    }

}