这是MainActivity Class
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.json.JSONObject;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
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.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;
public class MainActivity extends FragmentActivity {
GoogleMap map;
ArrayList markerPoints;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initializing
markerPoints = new ArrayList();
// Getting reference to SupportMapFragment of the activity_main
SupportMapFragment fm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
// Getting reference to Button
Button btnDraw = (Button)findViewById(R.id.btn_draw);
// Getting Map for the SupportMapFragment
map = fm.getMap();
// Enable MyLocation Button in the Map
map.setMyLocationEnabled(true);
// Setting onclick event listener for the map
map.setOnMapClickListener(new OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
// Already 10 locations with 8 waypoints and 1 start location and 1 end location.
// Upto 8 waypoints are allowed in a query for non-business users
if(markerPoints.size()>=10){
return;
}
// Adding new item to the ArrayList
markerPoints.add(point);
// Creating MarkerOptions
MarkerOptions options = new MarkerOptions();
// Setting the position of the marker
options.position(point);
/**
* For the start location, the color of marker is GREEN and
* for the end location, the color of marker is RED and
* for the rest of markers, the color is AZURE
*/
if(markerPoints.size()==1){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
}else if(markerPoints.size()==2){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
}else{
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE));
}
// Add new marker to the Google Map Android API V2
map.addMarker(options);
}
});
// The map will be cleared on long click
map.setOnMapLongClickListener(new OnMapLongClickListener() {
@Override
public void onMapLongClick(LatLng point) {
// Removes all the points from Google Map
map.clear();
// Removes all the points in the ArrayList
markerPoints.clear();
}
});
// Click event handler for Button btn_draw
btnDraw.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Checks, whether start and end locations are captured
if(markerPoints.size() >= 2){
LatLng origin = markerPoints.get(0);
LatLng dest = markerPoints.get(1);
// Getting URL to the Google Directions API
String url = getDirectionsUrl(origin, dest);
DownloadTask downloadTask = new DownloadTask();
// Start downloading json data from Google Directions API
downloadTask.execute(url);
}
}
});
}
private String getDirectionsUrl(LatLng origin,LatLng dest){
// Origin of route
String str_origin = "origin="+origin.latitude+","+origin.longitude;
// Destination of route
String str_dest = "destination="+dest.latitude+","+dest.longitude;
// Sensor enabled
String sensor = "sensor=false";
// Waypoints
String waypoints = "";
for(int i=2;i{
// Downloading data in non-ui thread
@Override
protected String doInBackground(String... url) {
// For storing data from web service
String data = "";
try{
// Fetching the data from web service
data = downloadUrl(url[0]);
}catch(Exception e){
Log.d("Background Task",e.toString());
}
return data;
}
// Executes in UI thread, after the execution of
// doInBackground()
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
ParserTask parserTask = new ParserTask();
// Invokes the thread for parsing the JSON data
parserTask.execute(result);
}
}
/** A class to parse the Google Places in JSON format */
private class ParserTask extends AsyncTask>> >{
// Parsing the data in non-ui thread
@Override
protected List>> doInBackground(String... jsonData) {
JSONObject jObject;
List>> routes = null;
try{
jObject = new JSONObject(jsonData[0]);
DirectionsJSONParser parser = new DirectionsJSONParser();
// Starts parsing data
routes = parser.parse(jObject);
}catch(Exception e){
e.printStackTrace();
}
return routes;
}
// Executes in UI thread, after the parsing process
@Override
protected void onPostExecute(List>> result) {
ArrayList points = null;
PolylineOptions lineOptions = null;
// Traversing through all the routes
for(int i=0;i();
lineOptions = new PolylineOptions();
// Fetching i-th route
List> path = result.get(i);
// Fetching all the points in i-th route
for(int j=0;j point = path.get(j);
double lat = Double.parseDouble(point.get("lat"));
double lng = Double.parseDouble(point.get("lng"));
LatLng position = new LatLng(lat, lng);
points.add(position);
}
// Adding all the points in the route to LineOptions
lineOptions.addAll(points);
lineOptions.width(2);
lineOptions.color(Color.RED);
}
// Drawing polyline in the Google Map for the i-th route
map.addPolyline(lineOptions);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Direction Parser Class就像这样
package in.wptrafficanalyzer.locationwaypointmapv2;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.google.android.gms.maps.model.LatLng;
public class DirectionsJSONParser {
/** Receives a JSONObject and returns a list of lists containing latitude and longitude */
public List>> parse(JSONObject jObject){
List>> routes = new ArrayList>>();
JSONArray jRoutes = null;
JSONArray jLegs = null;
JSONArray jSteps = null;
try {
jRoutes = jObject.getJSONArray("routes");
/** Traversing all routes */
for(int i=0;i>();
/** Traversing all legs */
for(int j=0;j list = decodePoly(polyline);
/** Traversing all points */
for(int l=0;l hm = new HashMap();
hm.put("lat", Double.toString(((LatLng)list.get(l)).latitude) );
hm.put("lng", Double.toString(((LatLng)list.get(l)).longitude) );
path.add(hm);
}
}
routes.add(path);
}
}
} catch (JSONException e) {
e.printStackTrace();
}catch (Exception e){
}
return routes;
}
/**
* Method to decode polyline points
* Courtesy : jeffreysambells.com/2010/05/27/decoding-polylines-from-google-maps-direction-api-with-java
* */
private List decodePoly(String encoded) {
List poly = new ArrayList();
int index = 0, len = encoded.length();
int lat = 0, lng = 0;
while (index = 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) = 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;
}
}
Android Manifest.xml是
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<permission
android:name="in.wptrafficanalyzer.locationwaypointmapv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="in.wptrafficanalyzer.locationwaypointmapv2.permission.MAPS_RECEIVE" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="in.wptrafficanalyzer.locationwaypointmapv2.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyC6TVk6gtR_i_.......**************"/>
</application>
布局activity_main.xml是
<Button
android:id="@+id/btn_draw"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/str_btn_draw"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<fragment
android:id="@+id/map"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
class="com.google.android.gms.maps.SupportMapFragment"
android:layout_above="@id/btn_draw" />
我的LogCat文件是
03-02 21:35:25.157: D/dalvikvm(25733): Late-enabling CheckJNI
03-02 21:35:25.758: D/AndroidRuntime(25733): Shutting down VM
03-02 21:35:25.758: W/dalvikvm(25733): threadid=1: thread exiting with uncaught exception (group=0x40ddd2a0)
03-02 21:35:25.768: E/AndroidRuntime(25733): FATAL EXCEPTION: main
03-02 21:35:25.768: E/AndroidRuntime(25733): java.lang.RuntimeException: Unable to start activity ComponentInfo{in.wptrafficanalyzer.locationwaypointmapv2/in.wptrafficanalyzer.locationwaypointmapv2.MainActivity}: android.view.InflateException: Binary XML file line #16: Error inflating class fragment
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread.access$700(ActivityThread.java:140)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.os.Looper.loop(Looper.java:137)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread.main(ActivityThread.java:4935)
03-02 21:35:25.768: E/AndroidRuntime(25733): at java.lang.reflect.Method.invokeNative(Native Method)
03-02 21:35:25.768: E/AndroidRuntime(25733): at java.lang.reflect.Method.invoke(Method.java:511)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
03-02 21:35:25.768: E/AndroidRuntime(25733): at dalvik.system.NativeStart.main(Native Method)
03-02 21:35:25.768: E/AndroidRuntime(25733): Caused by: android.view.InflateException: Binary XML file line #16: Error inflating class fragment
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:710)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.rInflate(LayoutInflater.java:752)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:316)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.Activity.setContentView(Activity.java:1924)
03-02 21:35:25.768: E/AndroidRuntime(25733): at in.wptrafficanalyzer.locationwaypointmapv2.MainActivity.onCreate(MainActivity.java:43)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.Activity.performCreate(Activity.java:5206)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
03-02 21:35:25.768: E/AndroidRuntime(25733): ... 11 more
03-02 21:35:25.768: E/AndroidRuntime(25733): Caused by: java.lang.IllegalStateException: The meta-data tag in your app's AndroidManifest.xml does not have the right value. Expected 4242000 but found 0. You must have the following declaration within the element:
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.common.GooglePlayServicesUtil.n(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.internal.q.v(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.internal.q.u(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.MapsInitializer.initialize(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.SupportMapFragment$b.ex(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.SupportMapFragment$b.a(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.dynamic.a.a(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.dynamic.a.onInflate(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
03-02 21:35:25.768: E/AndroidRuntime(25733): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:682)
03-02 21:35:25.768: E/AndroidRuntime(25733): ... 21 more
请帮助
答案 0 :(得分：4)
问题在于：
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyC6TVk6gtR_i_.......**************"/>
此处meta-data代码需要integer，因此您必须在此处包含您正在使用的com.google.android.maps库的版本。您可能会在项目中包含的lib中找到它，然后只需定义：
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="@integer/your_google_maps_version" />
答案 1 :(得分：0)
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyC6TVk6gtR_i_.......**************"/>
在manifest.xml中，只需在应用程序＆gt;之后添加它。标记和第一次活动之前