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public void getLocationProvider(){try{Criteria mCriteria01 = new Criteria();mCriteria01.setAccuracy(Criteria.ACCURACY_FINE);mCriteria01.setAltitudeRequired(false);mCriteria01.setBearingRequired(false);mCriteria01.setCostAllowed(true);mCriteria01.setPowerRequirement(Criteria.POWER_LOW);strLocationProvider =mLocationManager01.getBestProvider(mCriteria01, true);mLocation01 = mLocationManager01.getLastKnownLocation(strLocationProvider);}catch(Exception e){mTextView01.setText(e.toString());e.printStackTrace();}} 

獲取經(jīng)緯度，并返回GeoPoint對(duì)象

private GeoPoint getGeoByLocation(Location location){GeoPoint gp = null;try{/* 當(dāng)Location存在 */if (location != null){double geoLatitude = location.getLatitude()*1E6;double geoLongitude = location.getLongitude()*1E6;gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);}}catch(Exception e){e.printStackTrace();}return gp;}

將經(jīng)緯度轉(zhuǎn)換成實(shí)際屏幕坐標(biāo)

Point myScreenCoords = new Point();GeoPoint tmpGeoPoint = new GeoPoint((int)(mLocation.getLatitude()*1E6),(int)(mLocation.getLongitude()*1E6));mapView.getProjection().toPixels(tmpGeoPoint, myScreenCoords);

點(diǎn)擊MapView任意一點(diǎn)獲得坐標(biāo)

@Overridepublic boolean onTouchEvent(MotionEvent ev) {int actionType = ev.getAction();switch (actionType) {case MotionEvent.ACTION_UP:Projection proj = mapView.getProjection();GeoPoint loc = proj.fromPixels((int)arg0.getX(), (int)arg0.getY());String sirina=Double.toString(loc.getLongitudeE6()/1000000);String dolzina=Double.toString(loc.getLatitudeE6()/1000000);}return false;}

經(jīng)緯度改變來(lái)刷新地圖

  public void refreshMapView(){GeoPoint p = new GeoPoint((int)(dLat* 1E6), (int)(dLng* 1E6));mMapView01.displayZoomControls(true);/* 將Map的中點(diǎn)移至GeoPoint */mMapController01.animateTo(p);mMapController01.setZoom(intZoomLevel);} 

根據(jù)當(dāng)前的經(jīng)緯度，獲取相關(guān)的一些地址信息

/* 創(chuàng)建Geocoder對(duì)象 *///根據(jù)地理環(huán)境來(lái)確定編碼//注意這個(gè)Locale是java.util.Locale包的類(lèi),獲取當(dāng)前系統(tǒng)設(shè)定的語(yǔ)言Geocoder gc = new Geocoder(EX09_05.this, Locale.getDefault());/* 取出地理坐標(biāo)經(jīng)緯度 */double geoLatitude = (int)gp.getLatitudeE6()/1E6;double geoLongitude = (int)gp.getLongitudeE6()/1E6;/* 自經(jīng)緯度取得地址（可能有多行地址） */List<Address> lstAddress =gc.getFromLocation(geoLatitude, geoLongitude, 1);StringBuilder sb = new StringBuilder();/* 判斷地址是否為多行 */if (lstAddress.size() > 0){Address adsLocation = lstAddress.get(0);for(int i=0;i<adsLocation.getMaxAddressLineIndex();i++){sb.append(adsLocation.getAddressLine(i)).append("\n");}sb.append(adsLocation.getLocality()).append("\n");sb.append(adsLocation.getPostalCode()).append("\n");sb.append(adsLocation.getCountryName());}

根據(jù)輸入地址，取得其GeoPoint對(duì)象

  private GeoPoint getGeoByAddress(String strSearchAddress){GeoPoint gp = null;try{if(strSearchAddress!=""){Geocoder mGeocoder01 = new Geocoder(EX09_07.this, Locale.getDefault());List<Address> lstAddress = mGeocoder01.getFromLocationName(strSearchAddress, 1);if (!lstAddress.isEmpty()){Address adsLocation = lstAddress.get(0);double geoLatitude = adsLocation.getLatitude()*1E6;double geoLongitude = adsLocation.getLongitude()*1E6;gp = new GeoPoint((int) geoLatitude, (int) geoLongitude);}}}catch (Exception e){e.printStackTrace();}return gp;} 

地圖放大縮小按鈕

 /* 放大Map的Button */mButton02 = (Button)findViewById(R.id.myButton2);mButton02.setOnClickListener(new Button.OnClickListener(){public void onClick(View v){intZoomLevel++;if(intZoomLevel>mMapView01.getMaxZoomLevel()){intZoomLevel = mMapView01.getMaxZoomLevel();}mMapController01.setZoom(intZoomLevel);}});/* 縮小Map的Button */mButton03 = (Button)findViewById(R.id.myButton3);mButton03.setOnClickListener(new Button.OnClickListener(){public void onClick(View v){intZoomLevel--;if(intZoomLevel<1){intZoomLevel = 1;}mMapController01.setZoom(intZoomLevel);}});

以下文章轉(zhuǎn)載：http://marshal.easymorse.com/archives/2528
android location provider有兩個(gè)：

    * LocationManager.GPS_PROVIDER：GPS，精度比較高，但是慢而且消耗電力，而且可能因?yàn)樘鞖庠蚧蛘哒系K物而無(wú)法獲取衛(wèi)星信息，另外設(shè)備可能沒(méi)有GPS模塊；
    * LocationManager.NETWORK_PROVIDER：通過(guò)網(wǎng)絡(luò)獲取定位信息，精度低，耗電少，獲取信息速度較快，不依賴(lài)GPS模塊。

為了程序的通用性，希望動(dòng)態(tài)選擇location provider。對(duì)android通過(guò)Location API顯示地址信息做了個(gè)別改動(dòng)，可以看到使用了gps定位，精度較高：



這里使用到了Criteria，可根據(jù)當(dāng)前設(shè)備情況自動(dòng)選擇哪種location provider。見(jiàn)

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);Criteria criteria = new Criteria();criteria.setAccuracy(Criteria.ACCURACY_FINE);// 設(shè)置為最大精度criteria.setAltitudeRequired(false);//不要求海拔信息criteria.setBearingRequired(false);// 不要求方位信息criteria.setCostAllowed(true);//是否允許付費(fèi)criteria.setPowerRequirement(Criteria.POWER_LOW);// 對(duì)電量的要求location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, true));

原來(lái)的寫(xiě)法很簡(jiǎn)單：

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);location=locationManager.getLastKnownLocation(LocationManager.NETWORK)