首先获取LocationManager、Location及Criteria
LocationManager locationManager; String context = Context.LOCATION_SERVICE; locationManager = (LocationManager) getSystemService(context); Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); criteria.setAltitudeRequired(false); criteria.setBearingRequired(false); criteria.setCostAllowed(false); criteria.setPowerRequirement(Criteria.POWER_LOW); String provider = locationManager.getBestProvider(criteria, true); Location location = locationManager .getLastKnownLocation(provider);
Criteria 类介绍:
Criteria是“精确度”的意思,Criteria类提供若干个查询条件:
(1) public void setAccuracy( int accuracy)
位置解析的精度,高或低
参数: Criteria. ACCURACY_FINE,精确模式;
Criteria. ACCURACY_COARSE,模糊模式;
(2) public void setAltitudeRequired(booleanaltitudeRequired)
是否提供海拔高度信息,是或否
(3) public void setBearingRequired(boolean bearingRequired)
是否提供方向信息,是或否
(4) public void setCostAllowed(boolean costAllowed)
是否允许运营商计费,是或否
(5) public void setPowerRequirement(int level)
电池消耗,无、低、中、高,参数 Criteria. NO_REQUIREMENT,Criteria. POWER_LOW,Criteria. POWER_MEDIUM, orCriteria. POWER_HIGH,
(6) public void setSpeedRequired(boolean speedRequired)
是否提供速度信息,是或否
获取地理信息函数:
private void updateWithNewLocation(Location location) { String coordinate; TextView loc = (TextView) findViewById(R.id.loc); String addressStr = "no address \n"; if (location != null) { double lat = location.getLatitude(); double lng = location.getLongitude(); coordinate = "Latitude:" + lat + "\nLongitude:" + lng; double latitude = location.getLatitude(); double longitude = location.getLongitude(); Geocoder geocoder = new Geocoder(context, Locale.getDefault()); try { List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1); StringBuilder sb = new StringBuilder(); if (addresses.size() > 0) { Address address = addresses.get(0); for (int i = 0; i < address.getMaxAddressLineIndex(); i++) { sb.append(address.getAddressLine(i)).append("\n"); } sb.append(address.getLocality()).append("\n"); sb.append(address.getLocality()).append("\n"); sb.append(address.getCountryName()); addressStr = sb.toString(); } } catch (IOException e) { e.printStackTrace(); } } else { coordinate = "no coordinate!\n"; } loc.setText("your coordinate:\n" + coordinate + "\n" + addressStr); }