问题
iam new to android development.
i have tried to get location address using web service but i got class not found exception when i lunched this code.if any one could please suggest me proper solution for this..
code for service class....
public class MWService extends Service implements LocationListener {
private LocationManager myLocationManager;
private LocationProvider myLocationProvider;
private NotificationManager myNotificationManager;
private long frequency;
private double total_distance = 0;
private Location currentLocation;
public static final String BROADCAST_ACTION = "com.motorvehicle.android";
private final Handler handler = new Handler();
Intent intent;
private GeocoderHelper geocoder = new GeocoderHelper();
private boolean isStart=true;
private Location startLocation,endLocation;
private String startAddress="";
private String endAddress="";
private JSONArray jarray = new JSONArray();
private boolean isInternet;
//private final Handler handler = new Handler();
public void onLocationChanged(Location newLocation) {
try {
System.out.println("latitude current :"+currentLocation.getLatitude());
System.out.println("latitude current :"+currentLocation.getLongitude());
System.out.println("latitude new :"+newLocation.getLatitude());
System.out.println("latitude new :"+newLocation.getLongitude());
System.out.println("distance total :"+total_distance);
//System.out.println(distance(22.306813, 73.180239,22.301016, 73.177986, 'K') + " Kilometers\n");
double diff = 0.0;
diff = currentLocation.getLatitude()- newLocation.getLatitude();
System.out.println("difference ::"+diff);
if(diff != 0){
total_distance = total_distance + currentLocation.distanceTo(newLocation);
}
if(isStart){
isStart = false;
startLocation = newLocation;
/* if(InternetAvailable()){
//startAddress = geocoder.fetchCityName(getApplicationContext(),newLocation);
System.out.println("start address:"+startAddress);
}*/
}else{
endLocation = newLocation;
/*if(InternetAvailable()){
//endAddress = geocoder.fetchCityName(getApplicationContext(),newLocation);
System.out.println("endAddress :"+endAddress);
}*/
}
currentLocation = newLocation;
} catch (Exception e) {
currentLocation = newLocation;
e.printStackTrace();
}
}
public boolean InternetAvailable() {
Thread t = new Thread(new Runnable() {
@Override
public void run() {
// while(isStopMe){
System.out.println("This is inside ................. :");
try {
if (!checkConnection()) {
System.out.println("No Internet Connectivity");
isInternet = false;
System.out.println("First");
} else {
if (inetAddr()) {
System.out.println("Net Connectivity is Present");
isInternet = true;
System.out.println("Second");
} else {
if (mobileConnect()) {
System.out.println("THIRD");
if (inetAddr()) {
System.out
.println("Net Connectivity is Present");
isInternet = true;
System.out.println("FOURTH");
} else {
System.out
.println("No Internet Connectivity");
isInternet = false;
System.out.println("FIFTH");
}
} else {
System.out.println("No Internet Connectivity");
isInternet = false;
System.out.println("SIX");
}
}
}
} catch (Exception ex) {
System.out.println("Leak ko catch");
}
}
});
t.start();
try {
t.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return isInternet;
}
public boolean checkConnection() {
boolean connected = false;
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (cm != null) {
NetworkInfo[] netInfo = cm.getAllNetworkInfo();
for (NetworkInfo ni : netInfo) {
if ((ni.getTypeName().equalsIgnoreCase("WIFI") || ni
.getTypeName().equalsIgnoreCase("MOBILE"))
& ni.isConnected() & ni.isAvailable()) {
connected = true;
}
}
}
return connected;
}
public boolean inetAddr() {
boolean x1 = false;
try {
Socket s = new Socket();
s.connect(new InetSocketAddress("ntp-nist.ldsbc.edu",37),3000);
InputStream is = s.getInputStream();
Scanner scan = new Scanner(is);
while(scan.hasNextLine()){
System.out.println(scan.nextLine());
x1 = true;
}
} catch (IOException e) {
x1 = false;
}
return x1;
}
public boolean mobileConnect() {
boolean conn = false;
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNet = cm
.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (activeNet != null) {
conn = true;
} else {
conn = false;
}
return conn;
}
@SuppressWarnings("deprecation")
private void myNotify(String text) {
Notification notif = new Notification(R.drawable.ic_launcher, text, System
.currentTimeMillis());
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,new Intent(this, MainActivity.class), 0);
notif.setLatestEventInfo(this, "MotorVehicleApp", text, contentIntent);
// notif.defaults = Notification.DEFAULT_VIBRATE;
myNotificationManager.notify((int) System.currentTimeMillis(), notif);
}
@Override
public void onCreate() {
super.onCreate();
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(!provider.contains("gps")){ //if gps is disabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
sendBroadcast(poke);
}
intent = new Intent(BROADCAST_ACTION);
android.util.Log.d("MWD", "creating");
myLocationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
System.out.println("location manager:"+myLocationManager.getAllProviders());
myLocationProvider = myLocationManager.getProvider("gps");
myNotificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
updatePreferences();
handler.post(new Runnable() {
@Override public void run() {
Toast.makeText(getApplicationContext(), "Address:"+startAddress, Toast.LENGTH_LONG).show(); } });
}
public void updatePreferences() {
// sync local variables with preferences
android.util.Log.d("NWD", "updating preferences");
frequency = 10;
// update the LM with the new frequency
myLocationManager.removeUpdates(this);
myLocationManager.requestLocationUpdates(myLocationProvider.getName(),frequency, 0, this);
}
@Override
public void onDestroy() {
super.onDestroy();
/////------set edittext editable
android.util.Log.d("NWD", "destroying");
System.out.println("Inside on destroy of MWService");
myLocationManager.removeUpdates(this);
//myNotify("stopping");
InsertTripDetails_AsyncTask insert = new InsertTripDetails_AsyncTask();
insert.execute();
String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
if(provider.contains("gps")){ //if gps is enabled
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
sendBroadcast(poke);
}
handler.removeCallbacks(sendUpdatesToUI);
}
@SuppressWarnings("deprecation")
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
android.util.Log.d("NWD", "starting");
currentLocation = myLocationManager.getLastKnownLocation(myLocationProvider.getName());
//myNotify("starting");
handler.postDelayed(sendUpdatesToUI, 3000); // 1 sec
}
private Runnable sendUpdatesToUI = new Runnable() {
public void run() {
System.out.println("total_distance::"+total_distance);
intent.putExtra("distance",(total_distance/1000));
sendBroadcast(intent);
handler.postDelayed(this, 3000);
}
};
public void onProviderDisabled(String arg0) {
}
public void onProviderEnabled(String arg0) {
}
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
}
@Override
public IBinder onBind(Intent arg0) {
return null; // this is for heavy IPC, not used
}
private class InsertTripDetails_AsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
try {
try {
//InternetAvailable()
if(InternetAvailable()){
startAddress = geocoder.fetchCityName(getApplicationContext(),startLocation);
System.out.println("start address:"+startAddress);
endAddress = geocoder.fetchCityName(getApplicationContext(),endLocation);
System.out.println("end address:"+endAddress);
}else{
System.out.println("internet not available");
}
// Internet not available when data are store in latitude and longitute format
if(startAddress.equalsIgnoreCase("") && endAddress.equalsIgnoreCase("")){
DecimalFormat sd = new DecimalFormat("##.##");
System.out.println("1 lat:"+sd.format(startLocation.getLatitude()) +" long:"+sd.format(startLocation.getLongitude())+",lat:"+sd.format(endLocation.getLatitude()) +" long:"+sd.format(endLocation.getLongitude()));
}else if(startAddress.equalsIgnoreCase("")){
DecimalFormat sd = new DecimalFormat("##.##");
System.out.println("2 lat:"+sd.format(startLocation.getLatitude()) +" long:"+sd.format(startLocation.getLongitude())+","+endAddress);
}else if(endAddress.equalsIgnoreCase("")){
DecimalFormat sd = new DecimalFormat("##.##");
try {
System.out.println(startAddress+",3 lat:"+sd.format(endLocation.getLatitude()) +" long:"+sd.format(endLocation.getLongitude()));
} catch (Exception e) {
e.printStackTrace();
}
}
else{
System.out.println(startAddress+" "+ endAddress);
}
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("In catch of webservice thus no internet");
}
return "dfs";
}
@Override
protected void onPostExecute(String result) {
}
}
}
code for geocoder class
public class GeocoderHelper
{
private static final AndroidHttpClient ANDROID_HTTP_CLIENT = AndroidHttpClient.newInstance(GeocoderHelper.class.getName());
private String address="";
private Location i_Location;
private Context i_Context;
public String fetchCityName(final Context contex, final Location location)
{
i_Location = location;
i_Context = contex;
try {
return new Address().execute().get();
} catch (Exception e) {
return address;
}
}
public class Address extends AsyncTask<Void, Void, String>
{
@SuppressWarnings("unused")
@Override
protected String doInBackground(Void... params)
{
String cityName = null;
if (Geocoder.isPresent())
{
try
{
System.out.println("location latitude is"+i_Location.getLatitude());
System.out.println("location longitude is"+i_Location.getLongitude());
Geocoder geocoder = new Geocoder(i_Context, Locale.getDefault());
List<android.location.Address> addresses = geocoder.getFromLocation(i_Location.getLatitude(), i_Location.getLongitude(), 1);
if (addresses.size() > 0)
{
//cityName = addresses.get(0).getLocality();
address = addresses.get(0).getLocality();
System.out.println("geocoder inside present address is"+address);
}
}
catch (Exception ignored)
{
// after a while, Geocoder start to trhow "Service not availalbe" exception. really weird since it was working before (same device, same Android version etc..
}
}
if (cityName != null) // i.e., Geocoder succeed
{
return cityName;
}
else // i.e., Geocoder failed
{
return fetchCityNameUsingGoogleMap();
}
}
// Geocoder failed :-(
// Our B Plan : Google Map
private String fetchCityNameUsingGoogleMap()
{
try
{
String googleMapUrl = "http://maps.googleapis.com/maps/api/geocode/json?latlng=" + i_Location.getLatitude() + ","
+ i_Location.getLongitude() + "&sensor=false&language=fr";
JSONObject googleMapResponse = new JSONObject(ANDROID_HTTP_CLIENT.execute(new HttpGet(googleMapUrl),
new BasicResponseHandler()));
// many nested loops.. not great -> use expression instead
// loop among all results
JSONArray results = (JSONArray) googleMapResponse.get("results");
for (int i = 0; i < results.length(); i++)
{
// loop among all addresses within this result
JSONObject result = results.getJSONObject(i);
address = result.getString("formatted_address");
System.out.println("map address:"+address);
break;
/* if (result.has("address_components"))
{
JSONArray addressComponents = result.getJSONArray("address_components");
// loop among all address component to find a 'locality' or 'sublocality'
for (int j = 0; j < addressComponents.length(); j++)
{
JSONObject addressComponent = addressComponents.getJSONObject(j);
if (result.has("types"))
{
JSONArray types = addressComponent.getJSONArray("types");
// search for locality and sublocality
String cityName = null;
String ROUTE= null;
for (int k = 0; k < types.length(); k++)
{
if ("locality".equals(types.getString(k)) && cityName == null)
{
if (addressComponent.has("long_name"))
{
cityName = addressComponent.getString("long_name");
}
else if (addressComponent.has("short_name"))
{
cityName = addressComponent.getString("short_name");
}
}
if ("sublocality".equals(types.getString(k)))
{
if (addressComponent.has("long_name"))
{
cityName = addressComponent.getString("long_name");
}
else if (addressComponent.has("short_name"))
{
cityName = addressComponent.getString("short_name");
}
}
}
if (cityName != null)
{
address = cityName;
return cityName;
}
}
}
}*/
}
}
catch (Exception ignored)
{
ignored.printStackTrace();
}
return address;
}
protected void onPostExecute(String result)
{
super.onPostExecute(result);
}
}
}
code for MAinActivity class
public class MainActivity extends Activity {
//private final Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startService(new Intent(MainActivity.this,MWService.class));
}
@Override
protected void onPause() {
super.onPause();
stopService(new Intent(MainActivity.this,MWService.class));
}
}
i have use permission in my menifest file for both internet and AccessFineLocation
my logcat msg.....
10-31 13:40:41.937: ERROR/AndroidRuntime(825): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.address2/com.example.android.MainActivity}: java.lang.ClassNotFoundException: com.example.android.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.address2-1.apk]
10-31 13:40:41.937: ERROR/AndroidRuntime(825): Caused by: java.lang.ClassNotFoundException: com.example.android.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.address2-1.apk]
code for my menifest file....
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.android.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>
<service android:name="MWService"></service>
</application>
回答1:
Use my Code. I have successfully found my current address using coordinates but for that you have to enable wifi and gps. first add all these permissions in your android manifest file
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
AndroidGPSTrackingActivity.java*
package com.example.gpstracking;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Toast;
import android.widget.ToggleButton;
public class AndroidGPSTrackingActivity extends Activity {
Button btnShowLocation;
// GPSTracker class
GPSTracker gps;
ToggleButton gpstoggle,wifitoggle,datatoggle;
static WifiManager wifiManager;
LocationManager lm;
WebView web;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnShowLocation = (Button) findViewById(R.id.btnShowLocation);
gpstoggle = (ToggleButton) findViewById(R.id.gps);
wifitoggle = (ToggleButton) findViewById(R.id.wifi);
wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
lm = (LocationManager) getSystemService(LOCATION_SERVICE);
//gps toggle
gpstoggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
getApplicationContext().sendBroadcast(poke);
}
else{
final Intent poke = new Intent();
poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
getApplicationContext().sendBroadcast(poke);
}
}
});
//wifi toggle
wifitoggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
wifiManager.setWifiEnabled(true);
}
else{
wifiManager.setWifiEnabled(false);
}
}
});
//data toggle
datatoggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){
ConnectivityManager dataManager;
dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
Method dataMtd = null;
try {
dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
dataMtd.setAccessible(true);
dataMtd.invoke(dataManager, true);
} catch (NoSuchMethodException e1) {
e1.printStackTrace();
}
catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
catch (SecurityException e) {
e.printStackTrace();
}
}
else{
ConnectivityManager dataManager;
dataManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
Method dataMtd = null;
try {
dataMtd = ConnectivityManager.class.getDeclaredMethod("setMobileDataEnabled", boolean.class);
dataMtd.setAccessible(false);
dataMtd.invoke(dataManager, false);
} catch (NoSuchMethodException e1) {
e1.printStackTrace();
}
catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
catch (SecurityException e) {
e.printStackTrace();
}
}
}
});
// show location button click event
btnShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// create class object
gps = new GPSTracker(AndroidGPSTrackingActivity.this);
// check if GPS enabled
if(gps.canGetLocation()){
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
Geocoder gcd = new Geocoder(getApplicationContext(), Locale.getDefault());
List<Address> addresses = null;
try {
addresses = gcd.getFromLocation(latitude, longitude, 1);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(!(addresses == null)){
if (!addresses.isEmpty() ){
System.out.println(addresses.get(0).getLocality());
Address address = addresses.get(0);
String addressText = String.format("%s, %s, %s, %s, %s, %s",
address.getAddressLine(0),
address.getAddressLine(1),
address.getAddressLine(2),
address.getAddressLine(3),
address.getPhone(),
address.getPremises());
System.out.println(addressText);
// \n is for new line
Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
}else{
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
}
}
});
}
}
GPSTracker.java
package com.example.gpstracking;
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
import android.util.Log;
import android.widget.Toast;
public class GPSTracker extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
boolean wifiEnabled = AndroidGPSTrackingActivity.wifiManager.isWifiEnabled();
ConnectivityManager cm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
this.canGetLocation = true;
// if DATA Enabled get lat/long using WIFI Services
if (activeNetwork.isConnected()) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
}
// if WIFI Enabled get lat/long using WIFI Services
if (wifiEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
}
}
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button android:id="@+id/btnShowLocation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show Location"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"/>
<ToggleButton
android:id="@+id/gps"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/btnShowLocation"
android:layout_alignRight="@+id/btnShowLocation"
android:layout_marginBottom="49dp"
android:layout_marginRight="72dp"
android:text="GPS"
/>
<ToggleButton
android:id="@+id/wifi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/gps"
android:layout_alignBottom="@+id/gps"
android:layout_alignLeft="@+id/btnShowLocation"
android:layout_marginLeft="79dp"
android:text="WIFI" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/gps"
android:layout_alignLeft="@+id/btnShowLocation"
android:text="GPS"
android:textSize="15sp" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView1"
android:layout_alignBottom="@+id/textView1"
android:layout_marginLeft="61dp"
android:layout_toRightOf="@+id/textView1"
android:text="WIFI"
android:textSize="15sp" />
</RelativeLayout>
来源：https://stackoverflow.com/questions/19701535/getting-address-in-android-using-web-service