以下是获取GPS卫星定位基础代码
//首先获取位置管理器
LocationManager alm = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
//设置过滤条件
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE); // 高精度
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗
String provider = locationManager.getBestProvider(criteria, true); // 获取GPS信息
Location location = locationManager.getLastKnownLocation(provider); // 通过GPS获取位置
// 设置监听器,自动更新的最小时间为间隔N秒(1秒为1*1000,这样写主要为了方便)或最小位移变化超过N米 locationManager.requestLocationUpdates(provider, 100 * 1000, 500, locationListener);
//更新位置信息
if (location != null) { double latitude = location.getLatitude(); double longitude= location.getLongitude(); tv1.setText("维度:" + latitude+ "\n经度" + longitude); } else { tv1.setText("无法获取地理信息"); }
但有些权限须要配置:如下所示
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FIND_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
但是有的时候须要将汉语描述位置信息转化成经纬度:
/**
* 由详细地址信息转换为经纬度
*/
public static double[] getLocationInfoByGoogle(String address){
//定义一个HttpClient,用于向指定地址发送请求
HttpClient client = new DefaultHttpClient();
//向指定地址发送Get请求
HttpGet hhtpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?address="+address+"ka&sensor=false");
StringBuilder sb = new StringBuilder();
try {
//获取服务器响应
HttpResponse response = client.execute(hhtpGet);
HttpEntity entity = response.getEntity();
//获取服务器响应的输入流
InputStream stream = entity.getContent();
int b;
//循环读取服务器响应
while((b = stream.read()) != -1){
sb.append((char)b);
}
//将服务器返回的字符串转换为JSONObject 对象
JSONObject jsonObject = new JSONObject(sb.toString());
//从JSONObject 中取出location 属性
JSONObject location = jsonObject.getJSONObject("results").getJSONObject("0").getJSONObject("geometry").getJSONObject("location");
//获取经度信息
double longtitude = location.getDouble("lng");
double latitude = location.getDouble("lat");
return new double[]{longtitude,latitude};
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
下面是将经纬度转化成汉语描述信息:
/**
* 根据经纬度获取对应地址,此处的经纬度须使用Google或者高德地图的经纬度;
*/
public static String getAddressByGoogle(double longitude,double latitude){
//定义一个HttpClient,用于向指定地址发送请求
HttpClient client = new DefaultHttpClient();
//向指定地址发送Get请求
HttpGet hhtpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?latlng="+latitude+","+longitude+"&sensor=false®ion=cn");
StringBuilder sb = new StringBuilder();
try {
//获取服务器响应
HttpResponse response = client.execute(hhtpGet);
HttpEntity entity = response.getEntity();
//获取服务器响应的输入流
InputStream stream = entity.getContent();
int b;
//循环读取服务器响应
while((b = stream.read()) != -1){
sb.append((char)b);
}
//将服务器返回的字符串转换为JSONObject 对象
JSONObject jsonObject = new JSONObject(sb.toString());
//从JSONObject 中取出location 属性
JSONObject location = jsonObject.getJSONObject("results").getJSONObject("0").getJSONObject("formatted_address");
return location.toString();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}