android应用平台的google maps应用

package com.fozhyn; import java.util.List; 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; import android.app.AlertDialog; import android.content.ActivityNotFoundException; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.provider.Settings; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.widget.EditText; import android.widget.ImageButton; import android.widget.LinearLayout; import android.widget.Toast; public class MainAppActivity extends MapActivity { /** Called when the activity is first created. */ ImageButton btnSearch; ImageButton btnLayer; ImageButton btnMyLocation; EditText edAddr; MapView myMapView; MapController myMapCtrler; LinearLayout hideCusor; Boolean flag; Boolean updateLocation; Bitmap posBitmap,locBitmap; LocationManager myLocationManager; Location myLocation; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); posBitmap = BitmapFactory.decodeResource(getResources(),R.drawable.pos); locBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.loc); btnMyLocation = (ImageButton)findViewById(R.id.loction); btnSearch = (ImageButton)findViewById(R.id.btnSearch); edAddr = (EditText)findViewById(R.id.addr); myMapView= (MapView)findViewById(R.id.mapView01); btnSearch.setOnClickListener(btnSearchListener); hideCusor =(LinearLayout)findViewById(R.id.hideCursor); btnLayer = (ImageButton)findViewById(R.id.layer); btnLayer.setOnClickListener(btnLayerLister); btnMyLocation.setOnClickListener(btnMyLocationListener); flag = true; updateLocation = true; myMapView.setBuiltInZoomControls(true); myMapCtrler = myMapView.getController(); myMapCtrler.setZoom(10); myLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); if (myLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) == false) { //Toast.makeText(getApplicationContext(), "请打开GPS以获取位置", Toast.LENGTH_LONG).show(); new AlertDialog.Builder(this) .setTitle("提高我的位置精确度") .setMessage("如需获取更精确的位置服务，请您在室外并打开GPS") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub Intent intent = new Intent(); intent.setAction(Settings.ACTION_LOCATION_SOURCE_SETTINGS); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); try { startActivity(intent); } catch(ActivityNotFoundException ex) { // The Android SDK doc says that the location settings activity // may not be found. In that case show the general settings. // General settings activity intent.setAction(Settings.ACTION_SETTINGS); try { startActivity(intent); } catch (Exception e) { } } // android.os.Process.killProcess(android.os.Process.myPid()); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub } }).show(); } myLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 3000, 0, myLocationListener); myLocation = getLocation(myLocationManager); btnMyLocation.performClick(); } final static int MENU_SEARCH = Menu.FIRST; final static int MENU_SWITCH = Menu.FIRST+1; final static int MENU_QUIT = Menu.FIRST+2; @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub menu.add(0,MENU_SEARCH,0,"搜索地图"); menu.add(0,MENU_SWITCH,1,"切换视图"); menu.add(0,MENU_QUIT,2,"退出"); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case MENU_SEARCH: InputMethodManager m=(InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); m.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS); edAddr.requestFocus(); break; case MENU_SWITCH: if (flag) { myMapView.setSatellite(true); flag = false; Toast.makeText(getApplicationContext(), "切换到卫星地图视图", Toast.LENGTH_SHORT).show(); } else { myMapView.setSatellite(false); flag = true; Toast.makeText(getApplicationContext(), "切换到普通地图视图", Toast.LENGTH_SHORT).show(); } break; case MENU_QUIT: new AlertDialog.Builder(this) .setTitle("退出") .setMessage("确定要退出程序？") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { android.os.Process.killProcess(android.os.Process.myPid()); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface arg0, int arg1) { // TODO Auto-generated method stub } }).show(); break; default: break; } return super.onOptionsItemSelected(item); } //根据经纬度更新视图 private void UpdateMapView(double lng,double lat,Bitmap bitmap) { GeoPoint geoPoint = new GeoPoint((int) (lat * 1E6) , (int) (lng * 1E6)); //设置显示缩放按钮 myMapView.displayZoomControls(true); //定位到指定位置 myMapCtrler.animateTo(geoPoint); //获取并清除mapview上的原有overlay对象 List<Overlay> overlays = myMapView.getOverlays(); overlays.clear(); //添加新的overlay对象 overlays.add(new PosOverlay(geoPoint, bitmap)); } //获取位置 public Location getLocation(LocationManager lm) { Location location = null; try { Criteria myCriteria = new Criteria(); //设置精准度 myCriteria.setAccuracy(Criteria.ACCURACY_FINE); myCriteria.setAltitudeRequired(false); myCriteria.setBearingRequired(false); myCriteria.setCostAllowed(true); myCriteria.setPowerRequirement(Criteria.POWER_LOW); location = lm.getLastKnownLocation(lm.getBestProvider(myCriteria, true)); } catch (Exception e) { e.printStackTrace(); } return location; } //监听搜索按钮点击事件 private final View.OnClickListener btnSearchListener = new View.OnClickListener() { @Override public void onClick(View arg0) { updateLo