it doesn't shows location details

[shawn peter]

this is my code.
but it doesn't sow me thw current longitude & latitudes

package com.android.aruna;

import java.io.IOException;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;


public class LocationFinder extends Activity implements LocationListener{
	
	public LocationManager locationmanager;
	
	public String locationDetails;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TextView locationDetailsTextView=(TextView)findViewById(R.id.locationDetailTxtView);
        
        Criteria cri=new Criteria();
        cri.setPowerRequirement(Criteria.POWER_LOW);
        cri.setAccuracy(Criteria.ACCURACY_FINE);
        
        locationmanager=(LocationManager) getSystemService(Context.LOCATION_SERVICE);
        
        String bestProvider=locationmanager.getBestProvider(cri, false);
        
        Location lastKnownLocation=locationmanager.getLastKnownLocation(bestProvider);
        
        if(lastKnownLocation!=null){
        	locationDetails="latitude"+lastKnownLocation.getLatitude()+"longitute"+lastKnownLocation.getLongitude();
        	locationDetailsTextView.setText(locationDetails);
        	
        	        }
    }

	@Override
	public void onLocationChanged(Location location) {
		
		TextView locationDetailsTextView=(TextView)findViewById(R.id.locationDetailTxtView);
		locationDetails="Last known location;-----latitude:"
			+location.getLatitude()+"longitude:"
			+location.getLongitude();
		
		Geocoder geo=new Geocoder(this);        	
    	try {
			List<Address> address=geo.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
			
			for(Address addresses:address){
				locationDetails+="Address is "+
				addresses.getAddressLine(0)+""+addresses.getCountryName();
			}
			
			locationDetailsTextView.setText(locationDetails);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	
		
	}

	@Override
	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub
		
	}
}

[Tim Moores]

Is there a call to LocationManager.requestLocationUpdates somewhere ... ?

[shawn peter]

thanks.i change the class to below

package com.android.aruna;

import java.io.IOException;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;


public class LocationFinder extends Activity implements LocationListener{
	
	public LocationManager locationmanager;
	
	public String locationDetails;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        TextView locationDetailsTextView=(TextView)findViewById(R.id.locationDetailTxtView);
        
        Criteria cri=new Criteria();
        cri.setPowerRequirement(Criteria.POWER_LOW);
        cri.setAccuracy(Criteria.ACCURACY_FINE);
        
        locationmanager=(LocationManager) getSystemService(Context.LOCATION_SERVICE);
        
        String bestProvider=locationmanager.getBestProvider(cri, false);
        
        Location lastKnownLocation=locationmanager.getLastKnownLocation(bestProvider);
        
        if(lastKnownLocation!=null){
        	locationDetails="latitude"+lastKnownLocation.getLatitude()+"longitute"+lastKnownLocation.getLongitude();
        	locationDetailsTextView.setText(locationDetails);
        	
        	
        	locationmanager.requestLocationUpdates(bestProvider, 500, 0.2f, this);
        	
        	        }
    }

	@Override
	public void onLocationChanged(Location location) {
		
		TextView locationDetailsTextView=(TextView)findViewById(R.id.locationDetailTxtView);
		locationDetails="Last known location;-----latitude:"
			+location.getLatitude()+"longitude:"
			+location.getLongitude();
		
		Geocoder geo=new Geocoder(this);        	
    	try {
			List<Address> address=geo.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
			
			for(Address addresses:address){
				locationDetails+="Address is "+
				addresses.getAddressLine(0)+""+addresses.getCountryName();
			}
			
			locationDetailsTextView.setText(locationDetails);
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	
		
	}

	@Override
	public void onProviderDisabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onProviderEnabled(String provider) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onStatusChanged(String provider, int status, Bundle extras) {
		// TODO Auto-generated method stub
		
	}
}

still it doesn't display anything.i moved more than 10 meters with my phone.But nothing shows

[shawn peter]

this is my main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    
    
        
	<LinearLayout android:layout_height="wrap_content" android:id="@+id/linearLayout1" android:layout_width="match_parent">
   <Button android:layout_height="wrap_content" android:id="@+id/button" android:layout_width="wrap_content" android:text="@string/button"></Button>

    </LinearLayout>
    
    <LinearLayout android:layout_height="wrap_content"   android:orientation="vertical" android:id="@+id/linearLayout1" android:layout_width="match_parent">
    <TextView  
   
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    android:id="@+id/locationDetailTxtView"/> 
    </LinearLayout>

this is my manifest file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.android.aruna"
      android:versionCode="1"
      android:versionName="1.0">

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.INTERNET" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".LocationFinder"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>

it shows me the button. then below the button it show below text
" Hello world , Location finder

other than that there is nothing ?

[Tim Moores]

Why is requestLocationUpdates only being called if there is a last known location? Have you done logging to determine whether it *is* being called? Which provider is selected as "bestProvider"?

[shawn peter]

I change the code as belows

if(lastKnownLocation!=null){
        	locationDetails="latitude"+lastKnownLocation.getLatitude()+"longitute"+lastKnownLocation.getLongitude();
        	locationDetailsTextView.setText(locationDetails);
        	
        	
        	        	
        	        }
        locationmanager.requestLocationUpdates(bestProvider, 500, 0.2f, this);

but still same.nothing display?

[shawn peter]

I try to debug this code.But it never gone to onLocationChanged method.I don't know why ?

[shawn peter]

Iam using android 2.3 os phone .Can it be a problem?