[英]Implementing Google Places API
在過去的幾天里，我一直在努力尋找一個簡單的教程，但似乎Google的API並不簡單。
這是到目前為止我所知道的，第1步使用將包含long和lat的url發送HTTP消息，API_Key第2步獲取結果，然后進行比對，第3步使用數據獲取我需要的信息。 我似乎無法弄清楚。 如果您可以提供一個示例或任何有關如何實現此API的信息，那就太好了！ 我的java文件
package com.example.learnaboutme;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import org.apache.commons.logging.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.ProgressDialog;
import android.content.Context;
import android.graphics.Color;
import android.location.Location;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.Polyline;
import com.google.android.gms.maps.model.PolylineOptions;
public class MainActivity extends FragmentActivity {
Context[] context = new Context[1];
GPS[] gps = new GPS[1];
Home home = null;
RelativeLayout[] rel = new RelativeLayout[1];
XMLParase xmlParase = null;
private GoogleMap myMap;
Polyline line;
Location location;
// Static LatLng
LatLng startLatLng = new LatLng(30.707104, 76.690749);
LatLng endLatLng = new LatLng(30.721419, 76.730017);
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.activity_main);
final TextView text = (TextView)this.findViewById(R.id.text);
gps[0] = new GPS();
gps[0].start(this);
home = new Home();
context[0] = this;
rel[0] = (RelativeLayout)findViewById(R.id.rel);
home.Initalize(rel, context);
xmlParase = new XMLParase();
location = gps[0].GetCoor();
myMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.mapk)).getMap();
try{
final LatLng PERTH = new LatLng(-31.90, 115.86);
Marker perth = myMap.addMarker(new MarkerOptions()
.position(PERTH)
.anchor((float)0.5,(float)0.5)
.rotation((float)90.0));
String urlTopass = makeURL(startLatLng.latitude,
startLatLng.longitude, endLatLng.latitude,
endLatLng.longitude);
// new connectAsyncTask(urlTopass).execute();
}catch(Exception e){
e.printStackTrace();
}
Timer timer = new Timer();
final Handler handler = new Handler();
timer.schedule(new TimerTask(){
public void run(){
handler.post(new Runnable(){
public void run()
{
home.Check(gps);
String data = MainActivity.this.xmlParase.readXML("locations.xml", context[0], "Home", "address");
if(!data.equals("")) {
text.setText(data);
}
}
});
}
}, 2000, 1000);
}
private class connectAsyncTask extends AsyncTask<Void, Void, String> {
private ProgressDialog progressDialog;
String url;
connectAsyncTask(String urlPass) {
url = urlPass;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = new ProgressDialog(context[0]);
progressDialog.setMessage("Fetching route, Please wait...");
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected String doInBackground(Void... params) {
JSONParser jParser = new JSONParser();
String json = jParser.getJSONFromUrl(url);
return json;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.hide();
if (result != null) {
drawPath(result);
}
}
}
public String makeURL(double sourcelat, double sourcelog, double destlat,
double destlog) {
StringBuilder urlString = new StringBuilder();
urlString.append("http://maps.googleapis.com/maps/api/directions/json");
urlString.append("?origin=");// from
urlString.append(Double.toString(sourcelat));
urlString.append(",");
urlString.append(Double.toString(sourcelog));
urlString.append("&destination=");// to
urlString.append(Double.toString(destlat));
urlString.append(",");
urlString.append(Double.toString(destlog));
urlString.append("&sensor=false&mode=driving&alternatives=true");
return urlString.toString();
}
public class JSONParser {
InputStream is = null;
JSONObject jObj = null;
String json = "";
// constructor
public JSONParser() {
}
public String getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
json = sb.toString();
is.close();
} catch (Exception e) {
}
return json;
}
}
public void drawPath(String result) {
if (line != null) {
myMap.clear();
}
myMap.addMarker(new MarkerOptions().position(endLatLng).icon(
BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
myMap.addMarker(new MarkerOptions().position(startLatLng).icon(
BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
try {
// Tranform the string into a json object
final JSONObject json = new JSONObject(result);
JSONArray routeArray = json.getJSONArray("routes");
JSONObject routes = routeArray.getJSONObject(0);
JSONObject overviewPolylines = routes
.getJSONObject("overview_polyline");
String encodedString = overviewPolylines.getString("points");
List<LatLng> list = decodePoly(encodedString);
PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true);
for (int z = 0; z < list.size(); z++) {
LatLng point = list.get(z);
options.add(point);
}
line = myMap.addPolyline(options);
/*for (int z = 0; z < list.size() - 1; z++) {
LatLng src = list.get(z);
LatLng dest = list.get(z + 1);
line = myMap.addPolyline(new PolylineOptions()
.add(new LatLng(src.latitude, src.longitude),
new LatLng(dest.latitude, dest.longitude))
.width(5).color(Color.BLUE).geodesic(true));
}*/
} catch (Exception e) {
e.printStackTrace();
}
}
private List<LatLng> decodePoly(String encoded) {
List<LatLng> poly = new ArrayList<LatLng>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index < len) {
int b, shift = 0, result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;
LatLng p = new LatLng((((double) lat / 1E5)),
(((double) lng / 1E5)));
poly.add(p);
}
return poly;
}
public boolean onCreateOptionsMenu(Menu var1) {
this.getMenuInflater().inflate(R.menu.main, var1);
return true;
}
}
我的xml文件
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:id="@+id/rel" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world"
android:id="@+id/text" />
<fragment
android:id="@+id/mapk"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
</RelativeLayout>
我得到的錯誤是
01-10 16:47:16.283: W/ActivityThread(8390): Application com.example.learnaboutme is waiting for the debugger on port 8100...
01-10 16:47:16.303: I/System.out(8390): Sending WAIT chunk
01-10 16:47:16.503: I/System.out(8390): Debugger has connected
01-10 16:47:16.503: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:16.703: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:16.904: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:17.104: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:17.304: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:17.504: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:17.704: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:17.905: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:18.105: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:18.305: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:18.505: I/System.out(8390): waiting for debugger to settle...
01-10 16:47:18.706: I/System.out(8390): debugger has settled (1424)
01-10 16:51:07.610: W/dalvikvm(8390): threadid=1: thread exiting with uncaught exception (group=0x410789d8)
01-10 16:51:07.680: E/AndroidRuntime(8390): FATAL EXCEPTION: main
01-10 16:51:07.680: E/AndroidRuntime(8390): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.learnaboutme/com.example.learnaboutme.MainActivity}: android.view.InflateException: Binary XML file line #18: Error inflating class fragment
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1960)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread.access$600(ActivityThread.java:127)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.os.Handler.dispatchMessage(Handler.java:99)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.os.Looper.loop(Looper.java:137)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread.main(ActivityThread.java:4477)
01-10 16:51:07.680: E/AndroidRuntime(8390): at java.lang.reflect.Method.invokeNative(Native Method)
01-10 16:51:07.680: E/AndroidRuntime(8390): at java.lang.reflect.Method.invoke(Method.java:511)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
01-10 16:51:07.680: E/AndroidRuntime(8390): at dalvik.system.NativeStart.main(Native Method)
01-10 16:51:07.680: E/AndroidRuntime(8390): Caused by: android.view.InflateException: Binary XML file line #18: Error inflating class fragment
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:262)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.Activity.setContentView(Activity.java:2071)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.example.learnaboutme.MainActivity.onCreate(MainActivity.java:61)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.Activity.performCreate(Activity.java:4701)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924)
01-10 16:51:07.680: E/AndroidRuntime(8390): ... 11 more
01-10 16:51:07.680: E/AndroidRuntime(8390): Caused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value. Expected 4030500 but found 0. You must have the following declaration within the <application> element: <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.common.GooglePlayServicesUtil.n(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.internal.q.v(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.internal.q.u(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.MapsInitializer.initialize(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.SupportMapFragment$b.cE(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.SupportMapFragment$b.a(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.dynamic.a.a(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.dynamic.a.onInflate(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:290)
01-10 16:51:07.680: E/AndroidRuntime(8390): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669)
01-10 16:51:07.680: E/AndroidRuntime(8390): ... 21 more
這是您需要的所有參考..
https://developers.google.com/places/documentation/ 和 https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/MapFragment
並且您可以使用相同的東西，如下所述。
檢查實現您所需的所有簡單類
public class MainActivity extends FragmentActivity implements OnClickListener {
private GoogleMap myMap;
Polyline line;
Context context;
Location location;
boolean check_provider_enabled = false;
// Static LatLng
LatLng startLatLng = new LatLng(30.707104, 76.690749);
LatLng endLatLng = new LatLng(30.721419, 76.730017);
public void onCreate(Bundle bd) {
super.onCreate(bd);
setContentView(R.layout.activity_main);
context = MainActivity.this;
// GoogleMap myMap
myMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
/*
// Construct a CameraPosition focusing on Mountain View and animate the camera to that position.
CameraPosition cameraPosition = new CameraPosition.Builder()
//.target(endLatLng) // Sets the center of the map to Mountain View
.zoom(17) // Sets the zoom
.bearing(90) // Sets the orientation of the camera to east
.tilt(30) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
myMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));*/
myMap.setMyLocationEnabled(true);
myMap.moveCamera(CameraUpdateFactory.newLatLng(startLatLng));
myMap.animateCamera(CameraUpdateFactory.zoomTo(12));
myMap.getUiSettings().setZoomControlsEnabled(false);
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = service.isProviderEnabled(LocationManager.GPS_PROVIDER);
location = service.getLastKnownLocation(LocationManager.GPS_PROVIDER);
// check if enabled and if not send user to the GSP settings
// Better solution would be to display a dialog and suggesting to
// go to the settings
if (!enabled) {
/*Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);*/
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
Toast.makeText(getApplicationContext(), "Enable GPS servcies to use this app.", Toast.LENGTH_LONG).show();
} else{
try{
final LatLng PERTH = new LatLng(-31.90, 115.86);
Marker perth = myMap.addMarker(new MarkerOptions()
.position(PERTH)
.anchor((float)0.5,(float)0.5)
.rotation((float)90.0));
String urlTopass = makeURL(startLatLng.latitude,
startLatLng.longitude, endLatLng.latitude,
endLatLng.longitude);
// new connectAsyncTask(urlTopass).execute();
}catch(Exception e){
e.printStackTrace();
}
}
/* if (myMap!=null){
Marker hamburg = myMap.addMarker(new MarkerOptions().position(startLatLng)
.title("Hamburg"));
Marker kiel = myMap.addMarker(new MarkerOptions()
.position(endLatLng)
.title("Vivek")
.snippet("VIVEK's ANDROID HACKER")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.one)));
}*/
// Now auto clicking the button
// btntemp.performClick();
}
/*
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_pass_home_call_temp:
String urlTopass = makeURL(startLatLng.latitude,
startLatLng.longitude, endLatLng.latitude,
endLatLng.longitude);
new connectAsyncTask(urlTopass).execute();
break;
default:
break;
}
}*/
private class connectAsyncTask extends AsyncTask<Void, Void, String> {
private ProgressDialog progressDialog;
String url;
connectAsyncTask(String urlPass) {
url = urlPass;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = new ProgressDialog(context);
progressDialog.setMessage("Fetching route, Please wait...");
progressDialog.setIndeterminate(true);
progressDialog.show();
}
@Override
protected String doInBackground(Void... params) {
JSONParser jParser = new JSONParser();
String json = jParser.getJSONFromUrl(url);
return json;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
progressDialog.hide();
if (result != null) {
drawPath(result);
}
}
}
public String makeURL(double sourcelat, double sourcelog, double destlat,
double destlog) {
StringBuilder urlString = new StringBuilder();
urlString.append("http://maps.googleapis.com/maps/api/directions/json");
urlString.append("?origin=");// from
urlString.append(Double.toString(sourcelat));
urlString.append(",");
urlString.append(Double.toString(sourcelog));
urlString.append("&destination=");// to
urlString.append(Double.toString(destlat));
urlString.append(",");
urlString.append(Double.toString(destlog));
urlString.append("&sensor=false&mode=driving&alternatives=true");
return urlString.toString();
}
public class JSONParser {
InputStream is = null;
JSONObject jObj = null;
String json = "";
// constructor
public JSONParser() {
}
public String getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
json = sb.toString();
is.close();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
return json;
}
}
public void drawPath(String result) {
if (line != null) {
myMap.clear();
}
myMap.addMarker(new MarkerOptions().position(endLatLng).icon(
BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
myMap.addMarker(new MarkerOptions().position(startLatLng).icon(
BitmapDescriptorFactory.fromResource(R.drawable.ic_launcher)));
try {
// Tranform the string into a json object
final JSONObject json = new JSONObject(result);
JSONArray routeArray = json.getJSONArray("routes");
JSONObject routes = routeArray.getJSONObject(0);
JSONObject overviewPolylines = routes
.getJSONObject("overview_polyline");
String encodedString = overviewPolylines.getString("points");
List<LatLng> list = decodePoly(encodedString);
PolylineOptions options = new PolylineOptions().width(5).color(Color.BLUE).geodesic(true);
for (int z = 0; z < list.size(); z++) {
LatLng point = list.get(z);
options.add(point);
}
line = myMap.addPolyline(options);
/*for (int z = 0; z < list.size() - 1; z++) {
LatLng src = list.get(z);
LatLng dest = list.get(z + 1);
line = myMap.addPolyline(new PolylineOptions()
.add(new LatLng(src.latitude, src.longitude),
new LatLng(dest.latitude, dest.longitude))
.width(5).color(Color.BLUE).geodesic(true));
}*/
} catch (Exception e) {
e.printStackTrace();
}
}
private List<LatLng> decodePoly(String encoded) {
List<LatLng> poly = new ArrayList<LatLng>();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index < len) {
int b, shift = 0, result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlat = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lat += dlat;
shift = 0;
result = 0;
do {
b = encoded.charAt(index++) - 63;
result |= (b & 0x1f) << shift;
shift += 5;
} while (b >= 0x20);
int dlng = ((result & 1) != 0 ? ~(result >> 1) : (result >> 1));
lng += dlng;
LatLng p = new LatLng((((double) lat / 1E5)),
(((double) lng / 1E5)));
poly.add(p);
}
return poly;
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
}
/*@Override
public void onMarkerDrag(Marker marker) {
//add the marker's latlng in a arraylist of LatLng and pass it to the loop
for (int i = 0; i < arraylistoflatlng.size(); i++) {
myMap.addPolyline(new PolylineOptions()
.addAll(arraylistoflatlng)
.width(5)
.color(Color.RED));
}
}*/
}
而已。 你已准備好出發。 干杯!
這是實現Google Places的代碼。 以下是xml文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
<RelativeLayout
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="10dp">
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="250dp" />
</RelativeLayout>
</LinearLayout>
這是必須在Java文件中編寫的代碼
ArrayList<HashMap<String, String>> placesListItems = new ArrayList<HashMap<String,String>>();
// KEY Strings
public static String KEY_REFERENCE = "reference"; // id of the place
public static String KEY_NAME = "name"; // name of the place
public static String KEY_VICINITY = "vicinity"; // Place area name
lv = (ListView) findViewById(R.id.list);
// calling background Async task to load Google Places
// After getting places from Google all the data is shown in listview
new LoadPlaces().execute();
class LoadPlaces extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(PlacesActivity.this);
pDialog.setMessage(Html.fromHtml("<b>Search</b><br/>Loading Places..."));
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting Places JSON
* */
protected String doInBackground(String... args) {
// creating Places class object
googlePlaces = new GooglePlaces();
try {
// Separeate your place types by PIPE symbol "|"
// If you want all types places make it as null
// Check list of types supported by google
//
String types; // Listing places only cafes, restaurants
if(searchtype.equals("hotel"))
types = "cafe|restaurant|bakery|lodging|meal_delivery|meal_takeaway|";
// Radius in meters - increase this value if you don't find any places
double radius = 1000; // 1000 meters
// get nearest places
nearPlaces = googlePlaces.search(gps.getLatitude(),
gps.getLongitude(), radius, types);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* and show the data in UI
* Always use runOnUiThread(new Runnable()) to update UI from background
* thread, otherwise you will get error
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed Places into LISTVIEW
* */
// Get json response status
String status = nearPlaces.status;
// Check for all possible status
if(status.equals("OK")){
// Successfully got places details
if (nearPlaces.results != null) {
// loop through each place
SupportMapFragment mapFrag = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
GoogleMap Mmap=mapFrag.getMap();
LatLng start=new LatLng(gps.getLatitude(), gps.getLongitude());
md.showmap(Mmap, start);
sm.setmarker(PlacesActivity.this, Mmap,gps.getLatitude(), gps.getLongitude(), "You", R.drawable.mark_blue);
for (Place p : nearPlaces.results) {
HashMap<String, String> map = new HashMap<String, String>();
// Place reference won't display in listview - it will be hidden
// Place reference is used to get "place full details"
map.put(KEY_REFERENCE, p.reference);
// Place name
map.put(KEY_NAME, p.name);
sm.setmarker(PlacesActivity.this, Mmap, p.geometry.location.lat, p.geometry.location.lng, p.name, R.drawable.mark_red);
// adding HashMap to ArrayList
placesListItems.add(map);
}
// list adapter
ListAdapter adapter = new SimpleAdapter(PlacesActivity.this, placesListItems,
R.layout.list_item,
new String[] { KEY_REFERENCE, KEY_NAME}, new int[] {
R.id.reference, R.id.name });
// Adding data into listview
lv.setAdapter(adapter);
}
}
else if(status.equals("ZERO_RESULTS")){
// Zero results found
alert.showAlertDialog(PlacesActivity.this, "Near Places",
"Sorry no places found. Try to change the types of places",
false);
}
else if(status.equals("UNKNOWN_ERROR"))
{
alert.showAlertDialog(PlacesActivity.this, "Places Error",
"Sorry unknown error occured.",
false);
}
else if(status.equals("OVER_QUERY_LIMIT"))
{
alert.showAlertDialog(PlacesActivity.this, "Places Error",
"Sorry query limit to google places is reached",
false);
}
else if(status.equals("REQUEST_DENIED"))
{
alert.showAlertDialog(PlacesActivity.this, "Places Error",
"Sorry error occured. Request is denied",
false);
}
else if(status.equals("INVALID_REQUEST"))
{
alert.showAlertDialog(PlacesActivity.this, "Places Error",
"Sorry error occured. Invalid Request",
false);
}
else
{
alert.showAlertDialog(PlacesActivity.this, "Places Error",
"Sorry error occured.",
false);
}
}
});
}
}
LocationListener，LocationRequest，LocationServices在實施Google Maps API時導入無效，以便在Android Studio中查找附近的地點
[英]LocationListener, LocationRequest, LocationServices imports invalid while implementing Google Maps API to find nearby places in Android Studio
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