Location based service : Location « Hardware « Android

1. Android
2. Hardware
3. Location

Location based service

 
package app.test;


import android.os.Bundle;
import android.location.LocationManager;
import android.view.View;
import android.widget.TextView;
import android.content.Context;
import android.widget.Button;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Point;
import com.google.android.maps.MapController;



public class Test extends MapActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);
        final MapView myMap = (MapView) findViewById(R.id.myMap);
        final MapController myMapController = myMap.getController();
        final Button zoomIn = (Button) findViewById(R.id.buttonZoomIn);
        zoomIn.setOnClickListener(new Button.OnClickListener() {
           public void onClick(View v){
             ZoomIn(myMap,myMapController);
           }});
        final Button zoomOut = (Button) findViewById(R.id.buttonZoomOut);
        zoomOut.setOnClickListener(new Button.OnClickListener() {
           public void onClick(View v){
             ZoomOut(myMap,myMapController);
           }});
        final Button gpsButton = (Button) findViewById(R.id.gpsButton);
       gpsButton.setOnClickListener(new Button.OnClickListener() {
          public void onClick(View v){
            LoadProviders(myMap,myMapController);
          }});
       final Button viewMap = (Button) findViewById(R.id.buttonMapView);
       viewMap.setOnClickListener(new Button.OnClickListener() {
          public void onClick(View v){
            ShowMap(myMap,myMapController);
          }});
       final Button viewSat = (Button) findViewById(R.id.buttonSatView);
       viewSat.setOnClickListener(new Button.OnClickListener() {
          public void onClick(View v){
            ShowSat(myMap,myMapController);
          }});
             
    }

    public void LoadProviders(MapView mv, MapController mc){
      TextView latText = (TextView) findViewById(R.id.latText);
      TextView lngText = (TextView) findViewById(R.id.lngText);
      LocationManager myManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
      Double latPoint = myManager.getCurrentLocation("gps").getLatitude()*1E6;
      Double lngPoint = myManager.getCurrentLocation("gps").getLongitude()*1E6;
      latText.setText(latPoint.toString());
      lngText.setText(lngPoint.toString());
       Point myLocation = new Point(latPoint.intValue(),lngPoint.intValue());
       mc.centerMapTo(myLocation, false);
       mc.zoomTo(9);
       mv = null;
    }
    public void ZoomIn(MapView mv, MapController mc){
      if(mv.getZoomLevel()!=21){
      mc.zoomTo(mv.getZoomLevel()+ 1);
      }
    }
    public void ZoomOut(MapView mv, MapController mc){
      if(mv.getZoomLevel()!=1){
          mc.zoomTo(mv.getZoomLevel()- 1);
          }
    }
    public void ShowMap(MapView mv, MapController mc){
        if (mv.isSatellite()){
          mv.toggleSatellite();
        }
    }
    public void ShowSat(MapView mv, MapController mc){
    if (!mv.isSatellite()){
      mv.toggleSatellite();
    }
    }
    }




//main.xml


<?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"
    >
<Button
  android:id="@+id/gpsButton"  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Where Am I"
    />

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    > 
<TextView
  android:id="@+id/latLabel"
  android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Latitude: "
    /> 
<TextView
  android:id="@+id/latText"
  android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    />
 </LinearLayout>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    >   
 <TextView
  android:id="@+id/lngLabel"
  android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Longitude: "
    />   
 <TextView
  android:id="@+id/lngText"
  android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    />
</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
  <view class="com.google.android.maps.MapView"
        android:id="@+id/myMap" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>
          <Button android:id="@+id/buttonZoomIn"
            style="?android:attr/buttonStyleSmall"
            android:text="+"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
          <Button android:id="@+id/buttonMapView"
            style="?android:attr/buttonStyleSmall"
            android:text="Map"
            android:layout_alignRight="@+id/myMap"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
          <Button android:id="@+id/buttonSatView"
            style="?android:attr/buttonStyleSmall"
            android:text="Sat"
            android:layout_alignRight="@+id/myMap"
            android:layout_alignBottom="@+id/myMap"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
          <Button android:id="@+id/buttonZoomOut"
            style="?android:attr/buttonStyleSmall"
            android:text="-"
            android:layout_alignBottom="@+id/myMap"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />          
</RelativeLayout>  


</LinearLayout>

   
  

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