我正在尝试显示纬度和经度位置的应用程序。我试着给拉特。 ＆安培; LON。使用地理定位甚至模拟器控制的值，但我没有得到输出。任何人都可以帮助我吗？
这是我得到的代码和输出：
public class LocationTest extends Activity
{
private LocationManager mgr;
private TextView output;
private String best;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mgr = (LocationManager) getSystemService(LOCATION_SERVICE);
output = (TextView) findViewById(R.id.output);
StringBuilder sb = new StringBuilder("Enabled Provider:");
Criteria criteria = new Criteria();
String provider = mgr.getBestProvider(criteria, true);
mgr.requestLocationUpdates(provider, 1000, 0,
new LocationListener()
{
public void onLocationChanged(Location location) {}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
});
sb.append("\n").append(provider).append(":");
Location location = mgr.getLastKnownLocation(provider);
if (location != null)
{
double lat = location.getLatitude();
double lng = location.getLongitude();
sb.append(lat).append(",").append(lng);
}
else
{
sb.append("No Location");
}
output.setText(sb);
}
}
输出：
启用提供商： gps：没有位置
答案 0 :(得分：0)
您需要将代码放入public void onLocationChanged(Location location) {}的{{1}}。这是通知位置变化的地方。
LocationListener不会为您提供当前位置，但上次已知位置（在模拟器上很可能是 null ）。
使用Android SDK的DDMS发信号通知GPS位置。这将调用getLastKnownLocation()。您需要一种方法来保留班级中的新位置（例如，向onLocationChanged()添加Location班级对象。）
答案 1 :(得分：0)
你设置你的模拟器来接收模拟位置吗？ 如果没有，那么这样做，并通过telnet发送模拟位置，看它是否有效
这是我的代码，它工作正常（长一个）：你需要onLocation改变了部分; - ）
package tfe.rma.ciss.be;
import java.io.BufferedReader;
import java.util.List;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.Overlay;
import com.google.android.maps.MapView.LayoutParams;
public class TheMap extends MapActivity implements LocationListener
{ // public ServiceMenace serviceMenace;
public MyInterface monInterface ;
// public MonService monservice;
static final String tag = "Main"; // for Log
private MapView mapView = null;
private MapController mapController = null;
TextView txtInfo;
LocationManager lm;
StringBuilder sb;
int noOfFixes = 0;
double latitude=53, longitude= 4.16;
GeoPoint p,P2, p3;
double lat=53, latTest, longTest ;
double lng=4, A=2 ;
int clientID= 2;
BufferedReader bufferedReader= null;
public String update="", Data="";
Intent myIntent;
private EditText goLat;
private EditText goLon;
private MyLocationOverlay me=null;
double i= 3;
Point screenP3ts = new Point();
String _lat = "" , _long="";
/*public void onReceive(Context contex,Intent intent){
Data = intent.getStringExtra("datas");
}*/
@Override
protected boolean isLocationDisplayed() {
return false;
}
class MapOverlay extends com.google.android.maps.Overlay
{
@Override
public boolean draw(Canvas canvas, MapView mapView,
boolean shadow, long when)
{
super.draw(canvas, mapView, shadow);
//---translate the GeoPoint to screen pixels---
Point screenPts = new Point();
mapView.getProjection().toPixels(p, screenPts);
//---add the marker---
Bitmap bmp = BitmapFactory.decodeResource(
getResources(), R.drawable.blue);
canvas.drawBitmap(bmp, screenPts.x-15, screenPts.y-30, null);
// Point screenP2ts = new Point();
// mapView.getProjection().toPixels(P2, screenP2ts);
//
// //---add the marker---
// Bitmap bmp2 = BitmapFactory.decodeResource(
// getResources(), R.drawable.node_safe);
// canvas.drawBitmap(bmp2, screenP2ts.x-15, screenP2ts.y-30, null);
//
//
//---add the marker---
Bitmap bmp3 = BitmapFactory.decodeResource(
getResources(), R.drawable.maps_position_marker);
canvas.drawBitmap(bmp3, screenP3ts.x-15, screenP3ts.y-30, null);
return true;
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(getBaseContext(),
p.getLatitudeE6() / 1E6 + "," +
p.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
}
return false;
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.icon:
myIntent = new Intent (this, VisClass.class);
startActivity( myIntent);
break;
case R.id.text:
myIntent = new Intent (this, InfraredClass.class);
startActivity( myIntent);
break;
case R.id.icontext:
myIntent = new Intent (this, RadarClass.class);
startActivity( myIntent);
break;
case R.id.menu:
myIntent = new Intent (this, menu.class);
startActivity( myIntent);
break;
}
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
final MapView mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
//
lm = (LocationManager) getSystemService(LOCATION_SERVICE);
LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom);
View zoomView=mapView.getZoomControls();
zoomLayout.addView(zoomView,
new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
mapView.displayZoomControls(true);
/* mapView.setSatellite(true);
mapView.setStreetView(true);
mapView.setTraffic(true);*/
mapView.setBuiltInZoomControls(true);
mapController=mapView.getController();
String coordinates[] = {"53", "4.6"};//schuman/
//---Add a location marker---
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapView.invalidate();
p = new GeoPoint(
(int) (lat * 1E6),
(int) (lng * 1E6));
mapController.animateTo(p);
mapController.setCenter(p);
((Button)findViewById(R.id.goMap)).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
// On récupère notre EditText
EditText UserName = ((EditText)findViewById(R.id.getLon));
EditText Password = ((EditText)findViewById(R.id.getLat));
// On garde la chaîne de caractères
_lat = UserName.getText().toString();
_long = Password.getText().toString();
latTest = Double.parseDouble(_lat)* 1E6;
longTest = Double.parseDouble(_long)* 1E6;
p3 = new GeoPoint(
(int) (latTest ),
(int) (longTest ));
mapView.getProjection().toPixels(p3, screenP3ts);
mapController.animateTo(p3);
mapController.setCenter(p3);
Toast.makeText(TheMap.this, "lat=" + latTest + " et " + "long= " + longTest, Toast.LENGTH_SHORT).show();
}
});
((Button)findViewById(R.id.sat)).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
mapView.setSatellite(true);
}
});
((Button)findViewById(R.id.normal)).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
mapView.setSatellite(false);
mapView.setStreetView(false);
mapView.setTraffic(false);
}
});
((Button)findViewById(R.id.traffic)).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
mapView.setTraffic(true);
}
});
((Button)findViewById(R.id.street)).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
mapView.setStreetView(true);
}
});
}
@Override
protected void onResume() {
/*
* onResume is is always called after onStart, even if the app hasn't been
* paused
*
* add location listener and request updates every 1000ms or 10m
*/
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10f, this);
super.onResume();
}
@Override
protected void onPause() {
/* GPS, as it turns out, consumes battery very much */
lm.removeUpdates(this);
super.onResume();
}
@Override
public void onLocationChanged(Location location) {
Log.v(tag, "Location Changed");
lat= (int) (location.getLatitude());
lng= (int) (location.getLongitude());
sb = new StringBuilder(512);
noOfFixes++;
p = new GeoPoint(
(int) (location.getLatitude()*1E6),
(int) (location.getLongitude()*1E6));
mapController.animateTo(p);
mapController.setCenter(p);
Toast.makeText(this, "Lat= " + lat + " Long= " + lng, Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderEnabled(String provider) {
Log.v(tag, "Enabled");
Toast.makeText(this, "GPS Enabled", Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderDisabled(String provider) {
/* this is called if/when the GPS is disabled in settings */
Log.v(tag, "Disabled");
/* bring up the GPS settings */
Intent intent = new Intent(
android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
/* This is called when the GPS status alters */
switch (status) {
case LocationProvider.OUT_OF_SERVICE:
Log.v(tag, "Status Changed: Out of Service");
Toast.makeText(this, "GPS prvider: Out of Service",
Toast.LENGTH_SHORT).show();
break;
case LocationProvider.TEMPORARILY_UNAVAILABLE:
Log.v(tag, "Status Changed: Temporarily Unavailable");
Toast.makeText(this, "GPS provider: Temporarily Unavailable",
Toast.LENGTH_SHORT).show();
break;
case LocationProvider.AVAILABLE:
Log.v(tag, "Status Changed: Available");
Toast.makeText(this, "GPS Provider: Available",
Toast.LENGTH_SHORT).show();
break;
}
}
@Override
protected void onStop() {
/* may as well just finish since saving the state is not important for this toy app */
finish();
super.onStop();
}
ServiceConnection updateConnection = new ServiceConnection() {
public void onServiceConnected1(ComponentName className, IBinder service) {
// This is called when the connection with the service has been
// established, giving us the service object we can use to
// interact with the service.
// ServiceMenace ServiceMenace = ((ServiceMenace.UpdateBinder)service).getService();
monInterface = (MyInterface) service ;
Log.v("ViewMap.ServiceConnection.onServiceConnected", "connected to the update service");
}
public void onServiceDisconnected(ComponentName className) {
// This is called when the connection with the service has been
// unexpectedly disconnected -- that is, its process crashed.
// Because it is running in our same process, we should never
// see this happen.
Object ServiceMenace = null;
Log.v("ViewMap.ServiceConnection.onServiceDisconnected", "disconnected from the update service");
}
@Override
public void onServiceConnected(ComponentName arg0, IBinder arg1) {
// TODO Auto-generated method stub
}
};
@Override
protected boolean isRouteDisplayed() {
return false;
}
}
不知道
这是我的布局:(你可能仍然需要两个或三个图像资源，如果你需要它们收件箱我在youssoua1@gmail.com
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:id="@+id/zoom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
/>
<com.google.android.maps.MapView
android:id="@+id/mapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="0lcrLCvFHx-8bK4lgE307_CyHXxgbjefMiI3w9w"
/>
<LinearLayout android:id="@+id/zoom"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
/>
<SlidingDrawer
android:id="@+id/drawer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:handle="@+id/handle"
android:content="@+id/content"
>
<ImageView
android:id="@id/handle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/tray_handle_normal"
/>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@id/content"
android:background="@layout/background"
>
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="1,2"
>
<TableRow>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="2dip"
android:paddingRight="4dip"
android:text="Emplacement : "
/>
<EditText android:id="@+id/getLat"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cursorVisible="true"
android:editable="true"
android:singleLine="true"
android:layout_weight="1"
android:inputType="numberDecimal"
/>
<EditText android:id="@+id/getLon"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cursorVisible="true"
android:editable="true"
android:singleLine="true"
android:layout_weight="1"
android:inputType="numberDecimal"
/>
</TableRow>
</TableLayout>
<Button android:id="@+id/goMap"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Afficher !"
/>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@id/content"
>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/sat"
android:text="Satellite">
</Button>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/normal"
android:text="normal">
</Button>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/traffic"
android:text="traffic">
</Button>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/street"
android:text="street">
</Button>
</LinearLayout>
</LinearLayout>
</SlidingDrawer>
</RelativeLayout>