流星的隨筆記事~☆

import java.util.List;

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 android.app.AlertDialog;
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.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.widget.Toast;

public class MeteorMap extends MapActivity implements LocationListener
{
	private LocationManager locationManager;

	private MapView mapView;
	private MapController mapController;
	private MyLocationOverlay mylayer;

	private boolean enableTool;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		findControl();

	}

	private void init()
	{
		if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER))
		{

			new AlertDialog.Builder(MeteorMap.this).setTitle("地圖工具").setMessage("您尚未開啟定位服務，要前往設定頁面啟動定位服務嗎？")
					.setCancelable(false).setPositiveButton("OK", new DialogInterface.OnClickListener()
					{

						public void onClick(DialogInterface dialog, int which)
						{
							startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
						}
					}).setNegativeButton("Cancel", new DialogInterface.OnClickListener()
					{
						public void onClick(DialogInterface dialog, int which)
						{
							Toast.makeText(MeteorMap.this, "未開啟定位服務，無法使用本工具!!", Toast.LENGTH_SHORT).show();
						}
					}).show();

		}
		else
		{
			enableMyLocation();
			enableTool = true;
		}

	}

	private void findControl()
	{
		mapView = (MapView) findViewById(R.id.mapView);
		mapView.setBuiltInZoomControls(true);

		mapController = mapView.getController();
		mapController.setZoom(16);

		locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, MeteorMap.this);
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, MeteorMap.this);
	}

	private void enableMyLocation()
	{
		// 定位點
		List<Overlay> overlays = mapView.getOverlays();
		mylayer = new MyLocationOverlay(this, mapView);
		mylayer.enableCompass();
		mylayer.enableMyLocation();
		mylayer.runOnFirstFix(new Runnable()
		{

			public void run()
			{
				mapController.animateTo(mylayer.getMyLocation());
			}
		});
		overlays.add(mylayer);
	}

	@Override
	protected void onResume()
	{
		super.onResume();
		if (enableTool)
		{
			locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 0, MeteorMap.this);
			locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, MeteorMap.this);
			mylayer.enableMyLocation();
			mylayer.enableCompass();
		}
		else
		{
			init();
		}
	}

	@Override
	protected void onPause()
	{
		super.onPause();
		if (enableTool)
		{
			locationManager.removeUpdates(MeteorMap.this);
			mylayer.disableCompass();
			mylayer.disableMyLocation();

		}
	}

	@Override
	protected boolean isRouteDisplayed()
	{
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void onLocationChanged(Location location)
	{
		Log.v("map", location.toString());

	}

	@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

	}
}