android google map实例

package com.yarin.android.MobileMap; import java.io.IOException; import java.util.List; import java.util.Locale; import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; 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.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ArrayAdapter; import android.widget.EditText; import android.widget.TextView; 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.Overlay; public class MobileMap extends MapActivity { private MapView mMapView; private MapController mMapController; private Geocoder mGeocoder; private LocationOverlay mLocationOverlay; private LocationManager mlocationManager; private Location mLocation; private static final int Search = Menu.FIRST; private static final int SelectCity = Menu.FIRST + 1; private static final int ViewMode = Menu.FIRST + 2; private static final int Exit = Menu.FIRST + 3; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); init(); } protected boolean isRouteDisplayed() { return false; } public void init() { mMapView=(MapView)findViewById(R.id.MapView01); //取得MapController实例，控制地图 mMapController=mMapView.getController(); mlocationManager=(LocationManager)getSystemService(Context.LOCATION_SERVICE); mMapView.setEnabled(true); mMapView.setClickable(true); //设置显示模式 mMapView.setTraffic(false); mMapView.setSatellite(false); mMapView.setStreetView(true); //设置缩放 mMapView.setBuiltInZoomControls(true); //设置地图等级 mMapController.setZoom(12); mLocationOverlay=new LocationOverlay(this); List<Overlay> overlays=mMapView.getOverlays(); overlays.add(mLocationOverlay); Criteria criteria =new Criteria(); //经度要求 criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setAltitudeRequired(false); criteria.setBearingRequired(false); criteria.setCostAllowed(false); criteria.setPowerRequirement(Criteria.POWER_LOW); //取得效果最好的criteria String provider=mlocationManager.getBestProvider(criteria, true); //得到坐标相关的信息 mLocation=mlocationManager.getLastKnownLocation(provider); mGeocoder = new Geocoder(this,Locale.getDefault()); updateLocation(mLocation); mlocationManager.requestLocationUpdates(provider, 3000, 0,mLocationListener); } //更新定位 public void updateLocation(Location location) { if ( location == null ) { return; } mLocationOverlay.setLocation(location); Double geoLat=location.getLatitude()*1E6; Double geoLng=location.getLongitude()*1E6; //将其转换为int型 GeoPoint point=new GeoPoint(geoLat.intValue(),geoLng.intValue()); //定位到指定坐标 mMapController.animateTo(point); } public MapController getMapController() { return mMapController; } private final LocationListener mLocationListener=new LocationListener() { public void onLocationChanged(Location location) { updateLocation(location); } public void onProviderDisabled(String provider){} public void onProviderEnabled(String provider){} public void onStatusChanged(String provider,int status,Bundle extras){} }; public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); menu.add(0, Search, Menu.NONE, "搜索地点").setIcon(R.drawable.search); menu.add(0, SelectCity, Menu.NONE, "选择城市").setIcon(R.drawable.selectcity); menu.add(0, ViewMode, Menu.NONE, "地图模式").setIcon(R.drawable.viewmode); menu.add(0, Exit, Menu.NONE, "退出").setIcon(R.drawable.exit); return true; } public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); switch (item.getItemId()) { case Search: searchCity(); return true; case SelectCity: selectCity(); return true; case ViewMode: selectViewMode(); return true; case Exit: this.finish(); return true; } return true; } //选择城市 public void selectCity() { OnClickListener listener = new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which){ Double geoLat=ConstData.cityCode[which][0]*1E6; Double geoLng=ConstData.cityCode[which][1]*1E6; mLocation.setLatitude(ConstData.cityCode[which][0]); mLocation.setLongitude(ConstData.cityCode[which][1]); mLocationOverlay.setLocation(mLocation); GeoPoint point=new GeoPoint(geoLat.intValue(),geoLng.intValue()); //定位到指定坐标 mMapController.animateTo(point); } }; ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, ConstData.city); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); new AlertDialog.Builder(MobileMap.this) .setTitle("请选择城市") .setAdapter(adapter, listener) .show(); } //选择地图模式 public void selectViewMode() { OnClickListener listener = new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { switch ( which ) { case 0: mMapView.setTraffic(false); mMapView.setSatellite(false); mMapView.setStreetView(true); break; case 1: mMapView.setSatellite(false); mMapView.setStreetView(false); mMapView.setTraffic(true); break; case 2: mMapView.setStreetView(false); mMapView.setTraffic(false); mMapView.setSatellite(true); break; } } }; String[] menu={"街景模式","交通流量","卫星地图"}; new AlertDialog.Builder(MobileMap.this) .setTitle("请选择地图模式") .setItems(menu, listener) .show(); } //搜索城市 public void searchCity() { //自定义一个带输入的对话框由TextView和EditText构成 final LayoutInflater factory = LayoutInflater.from(MobileMap.this); final View dialogview = factory.inflate(R.layout.dialog, null); //设置TextView的提示信息 ((TextView) dialogview.findViewById(R.id.TextView01)).setText("搜索地图"); //设置EditText输入框初始值 ((EditText) dialogview.findViewById(R.id.EditText01)).setText("请输入要查找的地址..."); Builder builder = new Builder(MobileMap.this); builder.setTitle("请输入地名"); builder.setView(dialogview); builder.setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener() { public void onClick(DialogInterface dialog, int which) { //点击确定之后 String value = ((EditText) dialogview.findViewById(R.id.EditText01)).getText().toString().trim(); if ( value != "" ) { searchName(value); } } }); builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); builder.setOnCancelListener(new DialogInterface.OnCancelListener() { public void onCancel(DialogInterface dialog) { dialog.cancel(); } }); builder.show(); } public void searchName(String nameStr) { try { List<Address> addresses = mGeocoder.getFromLocationName