TrainStation（android map应用实例）

package com.demo.android.trainstation; import java.util.ArrayList; import java.util.List; import com.google.android.maps.GeoPoint; import com.google.android.maps.ItemizedOverlay; 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.OverlayItem; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.ViewGroup; import android.widget.Toast; public class TrainStation extends MapActivity { protected static final int MENU_TAIPEI = Menu.FIRST; protected static final int MENU_BEIJING = Menu.FIRST+1; protected static final int MENU_SHANGHAI = Menu.FIRST+2; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); findViews(); setupMap(); } private MapView map; private MapController controller; private MyLocationOverlay mylayer; private LandMarkOverlay marklayer; // private ViewGroup zoom; private void findViews(){ map = (MapView) findViewById(R.id.map); controller = map.getController(); // zoom = (ViewGroup) findViewById(R.id.zoom); // zoom.addView(map.getZsoomControls()); } private void setupMap(){ // GeoPoint station_taipei = new GeoPoint( // (int)(25.047192*1000000), // (int)(121.516981*1000000) // ); // map.setTraffic(true); map.setBuiltInZoomControls(true); // controller.setZoom(17); // controller.animateTo(station_taipei); List<Overlay> overlays = map.getOverlays(); mylayer = new MyLocationOverlay(this, map); mylayer.runOnFirstFix(new Runnable(){ public void run(){ map.setTraffic(true); controller.setZoom(17); controller.animateTo(mylayer.getMyLocation()); } }); overlays.add(mylayer); Drawable pin = getResources().getDrawable(android.R.drawable.btn_star_big_on); pin.setBounds(0, 0, pin.getMinimumWidth(), pin.getMinimumHeight()); marklayer = new LandMarkOverlay(pin); overlays.add(marklayer); } @Override protected boolean isRouteDisplayed() { // TODO Auto-generated method stub return false; } @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub menu.add(0, MENU_TAIPEI, 0, "台北"); menu.add(0, MENU_BEIJING, 0, "北京"); menu.add(0, MENU_SHANGHAI, 0, "上海"); return super.onCreateOptionsMenu(menu); } GeoPoint station_taipei = new GeoPoint( (int)(25.047192*1000000), (int)(121.516981*1000000) ); GeoPoint station_beijing = new GeoPoint( (int)(39.928416*1000000), (int)(116.139729*1000000) ); GeoPoint station_shanghai = new GeoPoint( (int)(31.251000*1000000), (int)(121.457000*1000000) ); @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub super.onOptionsItemSelected(item); switch(item.getItemId()){ case MENU_TAIPEI:controller.animateTo(station_taipei); break; case MENU_BEIJING:controller.animateTo(station_beijing); break; case MENU_SHANGHAI:controller.animateTo(station_shanghai); break; } return super.onOptionsItemSelected(item); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (keyCode == KeyEvent.KEYCODE_I) { controller.setZoom(Math.min(map.getMaxZoomLevel(), map.getZoomLevel() + 1)); return true; }else if (keyCode == KeyEvent.KEYCODE_O) { controller.setZoom(Math.max(15, map.getZoomLevel() - 1)); return true; }else if (keyCode == KeyEvent.KEYCODE_S) { map.setSatellite(true); map.setTraffic(true); return true; }else if (keyCode == KeyEvent.KEYCODE_T) { map.setSatellite(false); map.setTraffic(true); return true; } return super.onKeyDown(keyCode, event); } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); mylayer.enableMyLocation(); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); mylayer.disableMyLocation(); } private class LandMarkOverlay extends ItemizedOverlay<OverlayItem> { private List<OverlayItem> items = new ArrayList<OverlayItem>(); public LandMarkOverlay(Drawable defaultMarker) { super(defaultMarker); // TODO Auto-generated constructor stub items.add( new OverlayItem( station_taipei, "台北", "台北火车站" ) ); items.add( new OverlayItem( station_beijing, "北京", "北京火车站" ) ); items.add( new OverlayItem( station_shanghai, "上海", "上海火车站" ) ); populate(); } @Override protected OverlayItem createItem(int i) { // TODO Auto-generated method stub return items.get(i); } @Override public int size() { // TODO Auto-generated method stub return items.size(); } protected boolean onTap(int pIndex){ Toast.makeText(TrainStation.this, "这里是" + items.get(pIndex).getSnippet(), Toast.LENGTH_SHORT).show(); return true; } } }