MainActivity.java
package com.example.androidheregeocoder;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import android.support.v7.app.ActionBarActivity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
public class GeocodingTask extends AsyncTask<String, Void, String> {
TextView textViewRqs, textViewParsed;
String rqs;
HereResponse geoCodingRes;
GeocodingTask(TextView vRqs, TextView vParsed) {
textViewRqs = vRqs;
textViewParsed = vParsed;
}
@Override
protected String doInBackground(String... params) {
final String rqs = "http://geocoder.cit.api.here.com/6.2/geocode.xml"
+ "?searchtext=" + params[0] + "&gen=7"
+ "&app_id=DemoAppId01082013GAL"
+ "&app_code=AJKnXv84fjrb0KIHawS0Tg";
runOnUiThread(new Runnable(){
@Override
public void run() {
textViewRqs.setText(rqs);
}});
geoCodingRes = Parse(rqs);
return geoCodingRes.toString();
}
@Override
protected void onPostExecute(String result) {
textViewParsed.setText(result);
if(!geoCodingRes.DisplayPosition_Latitude.equals("")
&&!geoCodingRes.DisplayPosition_Longitude.equals("")){
double lat = Double.parseDouble(geoCodingRes.DisplayPosition_Latitude);
double lon = Double.parseDouble(geoCodingRes.DisplayPosition_Longitude);
updateHereMap(lat, lon);
}
}
private HereResponse Parse(String urlString) {
HereResponse hereResponse = new HereResponse();
final String XmlTag_Response = "Response";
final String XmlTag_MetaInfo = "MetaInfo";
final String XmlTag_Timestamp = "Timestamp";
final String XmlTag_View = "View";
final String XmlTag_ViewId = "ViewId";
final String XmlTag_Result = "Result";
final String XmlTag_Location = "Location";
final String XmlTag_DisplayPosition = "DisplayPosition";
final String XmlTag_NavigationPosition = "NavigationPosition";
final String XmlTag_TopLeft = "TopLeft";
final String XmlTag_BottomRight = "BottomRight";
final String XmlTag_Latitude = "Latitude";
final String XmlTag_Longitude = "Longitude";
final String XmlTag_Label = "Label";
final String XmlTag_Country = "Country";
final String XmlTag_State = "State";
final String XmlTag_County = "County";
final String XmlTag_City = "City";
final String XmlTag_District = "District";
final String XmlTag_Street = "Street";
final String XmlTag_HouseNumber = "HouseNumber";
final String XmlTag_PostalCode = "PostalCode";
String xmlPara = "";
String xmlGroupPara = "";
XmlPullParserFactory factory;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(false);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput((new URL(urlString)).openConnection()
.getInputStream(), "UTF_8");
int eventType;
do {
xpp.next();
eventType = xpp.getEventType();
switch (eventType) {
case XmlPullParser.START_DOCUMENT:
xmlPara = ""; //0;
xmlGroupPara = ""; //0;
break;
case XmlPullParser.END_DOCUMENT:
break;
case XmlPullParser.START_TAG:
String tag = xpp.getName();
xmlPara = tag;
if(tag.equals(XmlTag_DisplayPosition)
|| tag.equals(XmlTag_NavigationPosition)
|| tag.equals(XmlTag_TopLeft)
|| tag.equals(XmlTag_BottomRight)){
xmlGroupPara = tag;
}
break;
case XmlPullParser.END_TAG:
break;
case XmlPullParser.TEXT:
if(xmlPara.equals(XmlTag_Timestamp)){
hereResponse.Timestamp = xpp.getText();
}else if(xmlPara.equals(XmlTag_ViewId)){
hereResponse.ViewId = xpp.getText();
}else if(xmlPara.equals(XmlTag_Latitude)){
if(xmlGroupPara.equals(XmlTag_DisplayPosition)){
hereResponse.DisplayPosition_Latitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_NavigationPosition)){
hereResponse.NavigationPosition_Latitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_TopLeft)){
hereResponse.TopLeft_Latitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_BottomRight)){
hereResponse.BottomRight_Latitude = xpp.getText();
}
}else if(xmlPara.equals(XmlTag_Longitude)){
if(xmlGroupPara.equals(XmlTag_DisplayPosition)){
hereResponse.DisplayPosition_Longitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_NavigationPosition)){
hereResponse.NavigationPosition_Longitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_TopLeft)){
hereResponse.TopLeft_Longitude = xpp.getText();
}else if(xmlGroupPara.equals(XmlTag_BottomRight)){
hereResponse.BottomRight_Longitude = xpp.getText();
}
}else if(xmlPara.equals(XmlTag_Label)){
hereResponse.Label = xpp.getText();
}else if(xmlPara.equals(XmlTag_Country)){
hereResponse.Country = xpp.getText();
}else if(xmlPara.equals(XmlTag_State)){
hereResponse.State = xpp.getText();
}else if(xmlPara.equals(XmlTag_County)){
hereResponse.County = xpp.getText();
}else if(xmlPara.equals(XmlTag_City)){
hereResponse.City = xpp.getText();
}else if(xmlPara.equals(XmlTag_District)){
hereResponse.District = xpp.getText();
}else if(xmlPara.equals(XmlTag_Street)){
hereResponse.Street = xpp.getText();
}else if(xmlPara.equals(XmlTag_HouseNumber)){
hereResponse.HouseNumber = xpp.getText();
}else if(xmlPara.equals(XmlTag_PostalCode)){
hereResponse.PostalCode = xpp.getText();
}
break;
}
} while (eventType != XmlPullParser.END_DOCUMENT);
} catch (XmlPullParserException e) {
hereResponse.err = (e.getMessage());
e.printStackTrace();
} catch (MalformedURLException e) {
hereResponse.err = (e.getMessage());
e.printStackTrace();
} catch (IOException e) {
hereResponse.err = (e.getMessage());
e.printStackTrace();
}
return hereResponse;
}
}
public class HereResponse {
String Timestamp = "";
String ViewId = "";
String DisplayPosition_Latitude = "";
String DisplayPosition_Longitude = "";
String NavigationPosition_Latitude = "";
String NavigationPosition_Longitude = "";
String TopLeft_Latitude = "";
String TopLeft_Longitude = "";
String BottomRight_Latitude = "";
String BottomRight_Longitude = "";
String Label = "";
String Country = "";
String State = "";
String County = "";
String City = "";
String District = "";
String Street = "";
String HouseNumber = "";
String PostalCode = "";
String err = "";
public String toString() {
return "Timestamp: " + Timestamp + "\n"
+ "ViewId: " + ViewId + "\n"
+ "DisplayPosition_Latitude: " + DisplayPosition_Latitude + "\n"
+ "DisplayPosition_Longitude: " + DisplayPosition_Longitude + "\n"
+ "NavigationPosition_Latitude: " + NavigationPosition_Latitude + "\n"
+ "NavigationPosition_Longitude: " + NavigationPosition_Longitude + "\n"
+ "TopLeft_Latitude: " + TopLeft_Latitude + "\n"
+ "TopLeft_Longitude: " + TopLeft_Longitude + "\n"
+ "BottomRight_Latitude: " + BottomRight_Latitude + "\n"
+ "BottomRight_Longitude: " + BottomRight_Longitude + "\n"
+ "Label: " + Label + "\n"
+ "Country: " + Country + "\n"
+ "State: " + State + "\n"
+ "County: " + County + "\n"
+ "City: " + City + "\n"
+ "District: " + District + "\n"
+ "Street: " + Street + "\n"
+ "HouseNumber: " + HouseNumber + "\n"
+ "PostalCode: " + PostalCode + "\n"
+ "err: " + err;
}
}
public class LoadHereMapTask extends AsyncTask<URL, Void, Bitmap> {
ImageView imageView;
LoadHereMapTask(ImageView v){
imageView = v;
}
@Override
protected Bitmap doInBackground(URL... params) {
Bitmap bm = null;
URL urlMapImage = params[0];
try {
bm = BitmapFactory.decodeStream(urlMapImage.openConnection().getInputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bm;
}
@Override
protected void onPostExecute(Bitmap result) {
imageView.setImageBitmap(result);
}
}
private void updateHereMap(double lat, double lon){
URL urlTarget;
textMapRqs.setText("");
mapImage.setImageBitmap(null);
try {
String strTarget = genHereMapTileRequest(lat, lon);
textMapRqs.setText(strTarget);
urlTarget = new URL(strTarget);
new LoadHereMapTask(mapImage).execute(urlTarget);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
private String getMercatorProjection(double lat, double lon, int z){
/*
* reference:
* http://developer.here.com/rest-apis/documentation/enterprise-map-tile/topics/key-concepts.html
*/
double latRad = lat * Math.PI/180;
double n = Math.pow(2, z);
double xTile = n * ((lon + 180)/360);
double yTile = n * (1-(Math.log(Math.tan(latRad) + 1/Math.cos(latRad))/Math.PI))/2;
String strProjection = "/"+ String.valueOf(z)
+ "/" + String.valueOf((int)xTile)
+ "/" + String.valueOf((int)yTile);
return strProjection;
}
private String genHereMapTileRequest(double lat, double lon){
/*
* reference:
* https://developer.here.com/rest-apis/documentation/enterprise-map-tile/topics/resource-map-tile.html
*/
String BaseURL = "http://1.base.maps.cit.api.here.com";
String Path = "/maptile/2.1/";
String Resource = "maptile";
String Version = "/newest";
String scheme = "/normal.day";
String pixelCnt = "/512";
String ApplicationId = "DemoAppId01082013GAL"; //for demo
String ApplicationCode = "AJKnXv84fjrb0KIHawS0Tg"; //for demo
String png8 = "/png8";
//Always zoom = 12
String strZoomColumnRow = getMercatorProjection(lat, lon, 12);
String rqs = BaseURL + Path + Resource + Version + scheme + strZoomColumnRow
+ pixelCnt
+ png8
+ "?app_id=" + ApplicationId
+ "&app_code=" + ApplicationCode;
return rqs;
}
EditText textAddressIn;
Button buttonGet;
TextView textRqs, textParsed;
TextView textMapRqs;
ImageView mapImage;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textAddressIn = (EditText) findViewById(R.id.addressin);
buttonGet = (Button) findViewById(R.id.get);
textRqs = (TextView) findViewById(R.id.textrqs);
textParsed = (TextView) findViewById(R.id.textparsed);
textMapRqs = (TextView) findViewById(R.id.maprqs);
mapImage = (ImageView) findViewById(R.id.mapimage);
// for easy testing
textAddressIn.setText("425 W Randolph Street in Chicago");
buttonGet.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String strIn = textAddressIn.getText().toString();
if (!strIn.equals("")) {
String strHtml = strIn.replace(" ", "+");
getGetGeocode(strHtml);
}
}
});
}
private void getGetGeocode(String addr) {
new GeocodingTask(textRqs, textParsed).execute(addr);
}
}
/res/layout/activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.androidheregeocoder.MainActivity" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<EditText
android:id="@+id/addressin"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/get"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Get Geocode" />
<TextView
android:id="@+id/textrqs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textparsed"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</ScrollView>
</LinearLayout>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<TextView
android:id="@+id/maprqs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ImageView
android:id="@+id/mapimage"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
uses-permission of "android.permission.INTERNET" is needed in AndroidManifest.xml.
Download the files.~ More examples of using Here Map REST API on Android
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