在android中打开与谷歌地图相关的活动有困难
我对android非常陌生，我在网上得到了这个e-contact应用程序，但每当我试图打开任何活动，比如消防站，这个应用程序就会崩溃 这是消防站活动的代码，单击消防站图像视图后将调用该代码在android中打开与谷歌地图相关的活动有困难,android,google-maps-android-api-2,supportmapfragment,Android,Google Maps Android Api 2,Supportmapfragment,我对android非常陌生，我在网上得到了这个e-contact应用程序，但每当我试图打开任何活动，比如消防站，这个应用程序就会崩溃 这是消防站活动的代码，单击消防站图像视图后将调用该代码 package shravan.nyshadh.balaji; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList;
package shravan.nyshadh.balaji;
import java.io.BufferedReader;
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.StatusLine;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
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.GoogleMap.OnInfoWindowClickListener;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
/**
* In this activity, emergency icons are drawn according to the view that was clicked
* from MainActivity. Icons are numbered in order of increasing distance
* from user's current location.
*
*/
public class Maps extends FragmentActivity {
private GoogleMap myMap;
LocationManager lm;
LocationListener locationListener;
Location mLoc;
int code;
boolean zoomb = true;
ArrayList<String> ambulances = new ArrayList<String>();
boolean directioncheck = false;
// LIST VIEW
ListView listview;
ArrayList<String> itemlist = new ArrayList<String>();
ArrayAdapter<String> adapter;
ArrayList<Marker> markerlist;
Direction direction = new Direction();
ArrayList<LatLng> pline = new ArrayList<LatLng>();
LatLng currentmarker;
Integer cid;
String provider = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
/*
* Check if any of the radios (Mobile Data or Wi-Fi) are on.
*/
final WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
TelephonyManager telephonyManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
if(telephonyManager.getDataState() == 0 && wifiManager.isWifiEnabled() == false && manager.isProviderEnabled(LocationManager.GPS_PROVIDER) == false) {
AlertDialog.Builder ad = new AlertDialog.Builder(Maps.this);
ad.setTitle("First-Responder");
ad.setMessage("Your network and gps providers are off. Please enable one of them.");
ad.setPositiveButton("Network", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
AlertDialog.Builder network = new AlertDialog.Builder(Maps.this);
network.setTitle("First-Responder");
network.setMessage("Please choose between Wi-Fi and Mobile Data");
network.setPositiveButton("Wi-Fi", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.Settings.ACTION_WIFI_SETTINGS);
startActivity(intent);
provider = "network";
}
});
network.setNegativeButton("Mobile Data", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent = new Intent (android.provider.Settings.ACTION_DATA_ROAMING_SETTINGS);
startActivity(intent);
provider = "network";
}
});
network.show();
}
});
ad.setNegativeButton("GPS", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
provider = "gps";
}
});
ad.show();
}
if(telephonyManager.getDataState() == TelephonyManager.DATA_CONNECTED) {
provider = "network";
} else if (wifiManager.isWifiEnabled()) {
provider = "network";
} else if (manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
provider = "gps";
}
listview = (ListView)findViewById(R.id.listView);
adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,itemlist);
listview.setAdapter(adapter);
markerlist = new ArrayList<Marker>();
FragmentManager myFragmentManager = getSupportFragmentManager();
SupportMapFragment mySupportMapFragment = (SupportMapFragment) myFragmentManager.findFragmentById(R.id.map);
myMap = mySupportMapFragment.getMap();
myMap.setMyLocationEnabled(true);
myMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
Intent intent = getIntent();
code = intent.getIntExtra("key", 0);
if (provider != null) {
mLoc = lm.getLastKnownLocation(provider);
}
if (mLoc != null) {
query(mLoc);
}
listview.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//Toast.makeText(getApplicationContext(), Integer.toString(markerlist.size()), Toast.LENGTH_LONG).show();
LatLng point = markerlist.get(position).getPosition();
CameraUpdate center = CameraUpdateFactory.newLatLng(point);
myMap.animateCamera(center, 2000, null);
}
});
myMap.setOnInfoWindowClickListener(new OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(final Marker marker) {
// TODO Auto-generated method stub
AlertDialog.Builder ad = new AlertDialog.Builder(Maps.this);
ad.setTitle("First-Responder");
ad.setMessage("Would you like directions?");
ad.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick( DialogInterface dialog, int arg1) {
myMap.clear();
query(mLoc);
currentmarker = marker.getPosition();
LatLng pt = marker.getPosition();
direction.getmapsinfo(myMap, pt, mLoc, itemlist, adapter);
listview.setClickable(false);
}
});
ad.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
//ok, do nothing
dialog.cancel();
}
});
ad.show();
}
});
}
/**
* This method takes in a parameter loc, which is the user's current location. Then, according to the view
* pressed from MainActivity the according case is executed. The method performs a Google nearby search and
* returns a JSON String for parsing.
* @param loc
*/
public void query(Location loc) {
switch (code) {
case 1:
new GetHospitals()
.execute("https://maps.googleapis.com/maps/api/place/nearbysearch/json?location="
+ Double.toString(mLoc.getLatitude())
+ ","
+ Double.toString(mLoc.getLongitude())
+ "&rankby=distance&types=hospital&sensor=false&key=AIzaSyAPrOxAoTKUdaXtktg4B2QrdPZO5SpM0VQ");
break;
case 2:
new GetHospitals()
.execute("https://maps.googleapis.com/maps/api/place/nearbysearch/json?location="
+ Double.toString(mLoc.getLatitude())
+ ","
+ Double.toString(mLoc.getLongitude())
+ "&rankby=distance&types=police&sensor=false&key=AIzaSyAPrOxAoTKUdaXtktg4B2QrdPZO5SpM0VQ");
break;
case 3:
new GetHospitals()
.execute("https://maps.googleapis.com/maps/api/place/nearbysearch/json?location="
+ Double.toString(mLoc.getLatitude())
+ ","
+ Double.toString(mLoc.getLongitude())
+ "&rankby=distance&types=fire_station&sensor=false&key=AIzaSyAPrOxAoTKUdaXtktg4B2QrdPZO5SpM0VQ");
break;
case 4:
Database db = new Database(Maps.this);
LatLng point = new LatLng(mLoc.getLatitude(), mLoc.getLongitude());
ambulances = db.sort(point);
placemarkers(ambulances);
db.close();
break;
}
}
/**
* Assigns a number according to distance the nearest ambulance.
* @param ambulances
*/
private void placemarkers(ArrayList<String> ambulances){
Bitmap myWrittenBitmap;
for(int i = 0; i < ambulances.size(); i++){
String item = ambulances.get(i);
Marker m;
myWrittenBitmap = customImage(i+1, R.drawable.ambulance_launcher);
String[] values = item.split(",");
String name = values[0];
String number = values[1];
String itemlat = values[2];
String itemlong = values[3];
LatLng point = new LatLng(Double.parseDouble(itemlat), Double.parseDouble(itemlong));
m = myMap.addMarker(new MarkerOptions().position(point).title(name).snippet(number).icon(BitmapDescriptorFactory.fromBitmap(myWrittenBitmap)));
markerlist.add(m);
if(!directioncheck){
itemlist.add(Integer.toString(i+1)+" "+ name);
adapter.notifyDataSetChanged();
}
}
LatLng point = new LatLng(mLoc.getLatitude(), mLoc.getLongitude());
CameraUpdate center = CameraUpdateFactory.newLatLng(point);
CameraUpdate zoom = CameraUpdateFactory.zoomTo(12);
myMap.moveCamera(center);
myMap.animateCamera(zoom);
}
/**
* This method takes in an index and a picture (represented as an int)
* and creates a canvas on which to paint and write the number on.
* @param index
* @param resource
* @return bitmap
*/
// adding custom images to markers.
private Bitmap customImage(int index, int resource ){
Bitmap bm;
Bitmap myWrittenBitmap;
Canvas canvas;
Paint txtPaint;
bm = BitmapFactory.decodeResource(getResources(), resource);
myWrittenBitmap = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_4444);
// create a Canvas on which to draw and a Paint to write text.
canvas = new Canvas(myWrittenBitmap);
txtPaint = new Paint();
txtPaint.setColor(Color.RED);
txtPaint.setTextSize(12);
txtPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
txtPaint.setTypeface(Typeface.DEFAULT_BOLD);
//draw ref bitmap then text on our canvas
canvas.drawBitmap(bm, 0, 0, null);
canvas.drawText(Integer.toString(index), 10,10 , txtPaint);
return myWrittenBitmap;
}
private class MyLocationListener implements LocationListener {
@Override
public void onLocationChanged(Location loc) {
if (loc != null) {
mLoc = new Location(loc);
//query(mLoc);
}
}
@Override
public void onProviderDisabled(String provider) {
Context context = Maps.this;
AlertDialog.Builder ad = new AlertDialog.Builder(context);
ad.setTitle("Warning!");
ad.setMessage("Provider: " + provider + " disabled");
if(provider.equals("network")) {
String button1String = "Enable network";
ad.setPositiveButton(button1String, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int arg1) {
Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
});
}
ad.show();
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.maps, menu);
return true;
}
public String readConnectionString(String URL) {
StringBuilder stringBuilder = new StringBuilder();
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL);
try {
HttpResponse response = httpClient.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) {
HttpEntity entity = response.getEntity();
InputStream inputStream = entity.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
stringBuilder.append(line);
}
inputStream.close();
} else {
Log.d("ConnectionString", "Failed to connect");
}
} catch (Exception e) {
Log.d("ConnectionString", e.getLocalizedMessage());
}
return stringBuilder.toString();
}
private class GetHospitals extends AsyncTask<String, Void, String> {
protected String doInBackground(String... urls) {
return readConnectionString(urls[0]);
}
protected void onPostExecute(String JSONString) {
try {
JSONObject jsonObject = new JSONObject(JSONString);
JSONArray EmergencyItems = new JSONArray(
jsonObject.getString("results"));
for (int i = 0; i < EmergencyItems.length(); i++) {
JSONObject EmergencyItem = EmergencyItems.getJSONObject(i);
Double lat = Double.parseDouble(EmergencyItem
.getJSONObject("geometry")
.getJSONObject("location").getString("lat"));
Double lng = Double.parseDouble(EmergencyItem
.getJSONObject("geometry")
.getJSONObject("location").getString("lng"));
LatLng point = new LatLng(lat,lng);
Bitmap myWrittenBitmap;
Marker m;
switch (code) {
case 1:
myWrittenBitmap = customImage(i+1, R.drawable.hsp_launcher);
m = myMap.addMarker(new MarkerOptions().position(point).title(EmergencyItem.getString("name")).snippet(EmergencyItem.getString("vicinity")).icon(BitmapDescriptorFactory.fromBitmap(myWrittenBitmap)));
if(directioncheck == false){
itemlist.add(Integer.toString(i+1)+" "+ EmergencyItem.getString("name"));
adapter.notifyDataSetChanged();
}
markerlist.add(m);
break;
case 2:
myWrittenBitmap = customImage(i+1, R.drawable.pol_launcher);
m = myMap.addMarker(new MarkerOptions().position(point).title(EmergencyItem.getString("name")).snippet(EmergencyItem.getString("vicinity")).icon(BitmapDescriptorFactory.fromBitmap(myWrittenBitmap)));
if(directioncheck == false){
itemlist.add(Integer.toString(i+1)+" "+ EmergencyItem.getString("name"));
adapter.notifyDataSetChanged();
}
markerlist.add(m);
break;
case 3:
myWrittenBitmap = customImage(i+1, R.drawable.fire_launcher);
m = myMap.addMarker(new MarkerOptions().position(point).title(EmergencyItem.getString("name")).snippet(EmergencyItem.getString("vicinity")).icon(BitmapDescriptorFactory.fromBitmap(myWrittenBitmap)));
if(directioncheck == false){
itemlist.add(Integer.toString(i+1)+" "+ EmergencyItem.getString("name"));
adapter.notifyDataSetChanged();
}
markerlist.add(m);
break;
}
}
if(zoomb) {
LatLng point = new LatLng(mLoc.getLatitude(), mLoc.getLongitude());
CameraUpdate center = CameraUpdateFactory.newLatLng(point);
CameraUpdate zoom = CameraUpdateFactory.zoomTo(12);
myMap.moveCamera(center);
myMap.animateCamera(zoom);
zoomb=false;
}
} catch (Exception e) {
Log.d("EmergencyItem", e.getLocalizedMessage());
}
}
}
/** used upon resuming the application.
*
*/
@Override
public void onResume(){
super.onResume();
// if(provider == "network") {
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
// } else if (provider == "gps") {
// lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
// }
Log.v(null, "Maps's onResume Method !!!");
}
/**
* Android onPause method. Clears any stored location in location manager.
*/
@Override
public void onPause(){
super.onPause();
lm.removeUpdates(locationListener);
zoomb = true;
Log.v(null, "Maps's onPause Method !!!");
}
/**
* Android onSaveInstanceState method. Here, the
* driving instructions, latitudes and longitudes
* are stored.
*/
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if(direction.getDirections() != null){
Log.v("!NullDirection", "!NULL");
outState.putStringArrayList("DIRECTIONS", direction.getDirections());
Preferences.writeLatLng(this, Preferences.MLAT, currentmarker);
} else {
Log.v("NullDirection", "NULL");
}
}
/**
*
*/
@Override
protected void onRestoreInstanceState(Bundle inputState){
Log.v("INRESTORE", "onRestoreInstanceState");
if(inputState != null){
if(inputState.containsKey("DIRECTIONS")){
itemlist.clear();
//adapter.clear();
adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,itemlist);
ArrayList<String> tempitemlist = inputState.getStringArrayList("DIRECTIONS");
Log.v("FIRST DIRECTION", Integer.toString(itemlist.size()));
for(int i = 0; i < tempitemlist.size(); i++){
itemlist.add(tempitemlist.get(i));
adapter.notifyDataSetChanged();
}
directioncheck = true;
}
if(Preferences.readMarker(this, Preferences.MLAT) != null){
LatLng pts = Preferences.readMarker(this, Preferences.MLAT);
currentmarker = pts;
direction.getmapsinfo(myMap, pts, mLoc, itemlist, adapter);
}
}
}
}
Sakshi，请在这里发布您的错误代码。对不起，错误代码log cat或其他什么是什么意思？您是否导入了Google Play Services库？您是否在Xml文件中检查过，您还获取了supportMapFragment，而不仅仅是mapfragment？请检查此项
08-18 16:02:05.509: E/AndroidRuntime(3578): FATAL EXCEPTION: main
08-18 16:02:05.509: E/AndroidRuntime(3578):
java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
08-18 16:02:05.509: E/AndroidRuntime(3578): at
com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown
Source) 08-18 16:02:05.509: E/AndroidRuntime(3578): at
com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown
Source) 08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:279)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.view.LayoutInflater.inflate(LayoutInflater.java:489) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.view.LayoutInflater.inflate(LayoutInflater.java:396) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.view.LayoutInflater.inflate(LayoutInflater.java:352) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.app.Activity.setContentView(Activity.java:1881) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
shravan.nyshadh.balaji.Maps.onCreate(Maps.java:86) 08-18 16:02:05.509:
E/AndroidRuntime(3578): at
android.app.Activity.performCreate(Activity.java:5104) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.app.ActivityThread.access$600(ActivityThread.java:141) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
android.os.Handler.dispatchMessage(Handler.java:99) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
android.os.Looper.loop(Looper.java:137) 08-18 16:02:05.509:
E/AndroidRuntime(3578): at
android.app.ActivityThread.main(ActivityThread.java:5041) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
java.lang.reflect.Method.invokeNative(Native Method) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
java.lang.reflect.Method.invoke(Method.java:511) 08-18 16:02:05.509:
E/AndroidRuntime(3578): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
08-18 16:02:05.509: E/AndroidRuntime(3578): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 08-18
16:02:05.509: E/AndroidRuntime(3578): at
dalvik.system.NativeStart.main(Native Method)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fare_check_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="316dp"
class="com.google.android.gms.maps.SupportMapFragment" />
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>