Android 定位+天气预报

代码如下：

package com.example.x.first; import android.Manifest; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.provider.Settings; import android.support.v4.app.ActivityCompat; import android.view.View; import android.widget.TextView; import android.widget.Toast; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; /** * Created by X on 2016/8/10. */ public class MyWeather extends Activity { private static final int UpdateCity = 0; private static final int updateWeather = 1; LocationManager locationManager; Location location; TextView tv_city; TextView tv_type; TextView tv_high; TextView tv_low; String address; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.weather); initView(); initDate(); } private void initView() { tv_city = (TextView) findViewById(R.id.tv_city); tv_type = (TextView) findViewById(R.id.tv_type); tv_high = (TextView) findViewById(R.id.tv_high); tv_low = (TextView) findViewById(R.id.tv_low); findViewById(R.id.ibReturn).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } private void initDate() { locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return; } location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); setListener(); } Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what){ case UpdateCity: tv_city.setText(address); new MyThread().start(); break; case updateWeather: tv_high.setText(list.get(2).toString()); tv_low.setText(list.get(3).toString()); tv_type.setText(list.get(4).toString()); break; } } }; public void setListener() { locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1000, 0, new LocationListener() { @Override public void onLocationChanged(Location location) { // updateLocation(location); try { address = getCitynameByLocation(location); handler.sendEmptyMessage(UpdateCity); } catch (IOException e) { e.printStackTrace(); } } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { if (ActivityCompat.checkSelfPermission(MyWeather.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MyWeather.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return; } try { address = getCitynameByLocation(locationManager.getLastKnownLocation(provider)); handler.sendEmptyMessage(UpdateCity); } catch (IOException e) { e.printStackTrace(); } } @Override public void onProviderDisabled(String provider) { // updateLocation(null); try { address = getCitynameByLocation(null); handler.sendEmptyMessage(UpdateCity); } catch (IOException e) { e.printStackTrace(); } } }); } private String getCitynameByLocation(Location location) throws IOException { String latLongString = ""; String citiName = ""; // TextView myLocationText; // myLocationText = (TextView)findViewById(R.id.myLocationText); if (location != null) { double lat = location.getLatitude(); double lng = location.getLongitude(); // latLongString = "纬度:" + lat + "\n经度:" + lng; List<Address> addList = null; Geocoder ge = new Geocoder(this); try { addList = ge.getFromLocation(location.getLatitude(), location.getLongitude(), 1); } catch (IOException e) { e.printStackTrace(); } if(addList!=null && addList.size()>0){ for(int i=0; i<addList.size(); i++){ Address ad = addList.get(i); // latLongString += "\n"; latLongString = ad.getCountryName() + ";" + ad.getLocality(); citiName = ad.getLocality(); } } } else { latLongString = "无法获取地理信息"; } System.out.println("您当前的位置是:\n" +latLongString); // myLocationText.setText("您当前的位置是:\n" +latLongString); return citiName; } public void checkGPSIsOpen(){ //判断GPS是否正常启动 if(!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){ Toast.makeText(this, "请开启GPS导航...", Toast.LENGTH_SHORT).show(); //返回开启GPS导航设置界面 Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivityForResult(intent,0); return; } } //网络资源先获取输入流 public InputStream getIS(String path) { InputStream is = null; try { //创建URL对象 URL url = new URL(path); //获得httpurlconnection对象 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); //设置请求方法 conn.setRequestMethod("GET"); //获取输入流 is = conn.getInputStream(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return is; } // String path = "http://wthrcdn.etouch.cn/WeatherApi?city=%E5%8D%97%E4%BA%AC"; String path = "http://wthrcdn.etouch.cn/WeatherApi?city="; String city; String cityPath; List list; public class MyThread extends Thread { @Override public void run() { try{ int index = address.indexOf("市"); if (index!=-1){ city = URLEncoder.encode(address.substring(0,index),"UTF-8"); }else { city = URLEncoder.encode(address,"UTF-8"); } cityPath = path + city; System.out.println("cityPath---->"+cityPath); InputStream is = getIS(cityPath); // String str = convertStreamToString(is); list = xmlParse(is); handler.sendEmptyMessage(updateWeather); }catch (Exception e){ e.printStackTrace(); } } } public List xmlParse(InputStream is) { List alist = new ArrayList(); try { DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = documentBuilderFactory.newDocumentBuilder(); // Document document = builder.parse(getAssets().open("weather.xml")) ; Document document = builder.parse(is); Element root = document.getDocumentElement(); //获取城市 NodeList list = root.getElementsByTagName("city"); String city = list.item(0).getTextContent(); NodeList list_wendu = root.getElementsByTagName("wendu"); String wendu = list_wendu.item(0).getTextContent(); System.out.println("city----------------->" + city); //获取当天信息 NodeList list1 = root.getElementsByTagName("forecast"); Element list_forecast = (Element) list1.item(0); Element element_weather = (Element) list_forecast.getElementsByTagName("weather").item(0); String weather_high = element_weather.getElementsByTagName("high").item(0).getTextContent(); System.out.println("weather_high----------------->" + weather_high); String weather_low = element_weather.getElementsByTagName("low").item(0).getTextContent(); System.out.println("weather_low----------------->" + weather_low); Element day = (Element) element_weather.getElementsByTagName("day").item(0); String type = day.getElementsByTagName("type").item(0).getTextContent(); System.out.println("type----------------->" + type); alist.add(city); alist.add(wendu); alist.add(weather_high); alist.add(weather_low); alist.add(type); } catch (IOException e) { e.printStackTrace(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } return alist; } }

权限：

<uses-permission android:name="android.permission.INTERNET" />