gprs android程序

package jia.jiamap; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.res.Resources; import android.database.Cursor; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Point; import android.graphics.RectF; import android.graphics.Paint.Style; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; 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; public class ShowTrack extends MapActivity { // ����˵���Ҫ�ij��� private static final int MENU_NEW = Menu.FIRST + 1; private static final int MENU_CON = MENU_NEW + 1; private static final int MENU_DEL = MENU_CON + 1; private static final int MENU_MAIN = MENU_DEL + 1; private TrackDbAdapter mDbHelper; private LocateDbAdapter mlcDbHelper; private static final String TAG = "ShowTrack"; private static MapView mMapView; private MapController mc; protected MyLocationOverlay mOverlayController; private Button mZin; private Button mZout; private Button mPanN; private Button mPanE; private Button mPanW; private Button mPanS; private Button mGps; private Button mSat; private Button mTraffic; private Button mStreetview; private String mDefCaption = ""; private GeoPoint mDefPoint; private LocationManager lm; private LocationListener locationListener; private int track_id; private Long rowId; /** Called when the activity is first created. */ @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.show_track); findViews(); centerOnGPSPosition(); revArgs(); // /////////////// //mDbHelper = new TrackDbAdapter(this); //mDbHelper.open(); //mlcDbHelper = Track.getDbHelp(); //new LocateDbAdapter(this); //mlcDbHelper.open(); paintLocates(); startTrackService(); } private void startTrackService() { Intent i = new Intent("jia.jiamap.START_TRACK_SERVICE"); i.putExtra(LocateDbAdapter.TRACKID, track_id); startService(i); } private void stopTrackService() { stopService(new Intent("jia.jiamap.START_TRACK_SERVICE")); } private void paintLocates() { mlcDbHelper = new LocateDbAdapter(this); mlcDbHelper.open(); Cursor mLocatesCursor = mlcDbHelper.getTrackAllLocates(track_id); startManagingCursor(mLocatesCursor); Resources resources = getResources(); Overlay overlays = new LocateOverLay(resources .getDrawable(R.drawable.icon), mLocatesCursor); mMapView.getOverlays().add(overlays); mlcDbHelper.close(); } private void revArgs() { Log.d(TAG, "revArgs."); Bundle extras = getIntent().getExtras(); if (extras != null) { String name = extras.getString(TrackDbAdapter.NAME); //String desc = extras.getString(TrackDbAdapter.DESC); rowId = extras.getLong(TrackDbAdapter.KEY_ROWID); track_id = rowId.intValue(); Log.d(TAG, "rowId=" + rowId); if (name != null) { setTitle(name); } } } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } private void findViews() { Log.d(TAG, "find Views"); // Get the map view from resource file mMapView = (MapView) findViewById(R.id.mv); mc = mMapView.getController(); SharedPreferences settings = getSharedPreferences(Setting.SETTING_INFOS, 0); String setting_gps = settings.getString(Setting.SETTING_MAP, "10"); mc.setZoom(Integer.parseInt(setting_gps)); // Set up the button for "Pan East" mPanE = (Button) findViewById(R.id.sat); mPanE.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { panEast(); } }); // Set up the button for "Zoom In" mZin = (Button) findViewById(R.id.zin); mZin.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { zoomIn(); } }); // Set up the button for "Zoom Out" mZout = (Button) findViewById(R.id.zout); mZout.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { zoomOut(); } }); // Set up the button for "Pan North" mPanN = (Button) findViewById(R.id.pann); mPanN.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { panNorth(); } }); // Set up the button for "Pan East" mPanE = (Button) findViewById(R.id.pane); mPanE.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { panEast(); } }); // Set up the button for "Pan West" mPanW = (Button) findViewById(R.id.panw); mPanW.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { panWest(); } }); // Set up the button for "Pan South" mPanS = (Button) findViewById(R.id.pans); mPanS.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { panSouth(); } }); // Set up the button for "GPS" mGps = (Button) findViewById(R.id.gps); mGps.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { centerOnGPSPosition(); } }); // Set up the button for "Satellite toggle" mSat = (Button) findViewById(R.id.sat); mSat.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { toggleSatellite(); } }); // Set up the button for "Traffic toggle" mTraffic = (Button) findViewById(R.id.traffic); mTraffic.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { toggleTraffic(); } }); // Set up the button for "Traffic toggle" mStreetview = (Button) findViewById(R.id.streetview); mStreetview.setOnClickListener(new OnClickListener() { // @Override @Override public void onClick(View arg0) { toggleStreetView(); } }); // ---use the LocationManager class to obtain GPS locations--- lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationListener = new MyLocationListener(); lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { Log.d(TAG, "onKeyDown"); if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) { panWest(); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) { panEast(); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_UP) { panNorth(); return true; } else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) { panSouth(); return true; } return false; } public void panWest() { GeoPoint pt = new GeoPoint(mMapView.getMapCenter().getLatitudeE6(), mMapView.getMapCenter().getLongitudeE6() - mMapView.getLongitudeSpan() / 4); mc.setCenter(pt); } public void panEast() { GeoPoint pt = new GeoPoint(mMapView.getMapCenter().getLatitudeE6(), mMapView.getMapCenter().getLongitudeE6() + mMapView.getLongitudeSpan() / 4); mc.setCenter(pt); } public void panNorth() { GeoPoint pt = new GeoPoint(mMapView.ge