get network data

app/src/main/AndroidManifest.xml

@@ -18,6 +18,7 @@
 
     </application>
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.INTERNET"/>
 
 
 </manifest>

app/src/main/java/com/example/dell/pkuweather/MainActivity.java

@@ -1,23 +1,94 @@
 package com.example.dell.pkuweather;
 
 import android.app.Activity;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.View;
+import android.widget.ImageView;
 import android.widget.Toast;
 
 import com.example.dell.util.NetUtil;
 
-public class MainActivity extends Activity{
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class MainActivity extends Activity implements View.OnClickListener{
+    private ImageView mUpdateBtn;
     @Override
     protected void onCreate(Bundle savedInstanceState){
         super.onCreate(savedInstanceState);
         setContentView(R.layout.weather_info);
 
+        mUpdateBtn = (ImageView)findViewById(R.id.title_update_btn);//获取相应按钮
+        mUpdateBtn.setOnClickListener(this);
+
         if (NetUtil.getNetworkState(this)!=NetUtil.NETWORK_NONE){
             Log.d("myWeather","网络OK");
             Toast.makeText(MainActivity.this,"网络OK",Toast.LENGTH_LONG).show();
 
         }
     }
 
+    @Override
+    public void onClick(View view){
+        if (view.getId()==R.id.title_update_btn){
+            SharedPreferences sharedPreferences = getSharedPreferences("config",MODE_PRIVATE);
+            String cityCode = sharedPreferences.getString("main_city_code","101010100");
+            Log.d("myWeather",cityCode);
+
+            if(NetUtil.getNetworkState(this)!=NetUtil.NETWORK_NONE){
+                Log.d("myWeather","网络ok");
+                queryWeatherCode(cityCode);
+            }else{
+                Log.d("myWeather","网络false");
+                Toast.makeText(MainActivity.this, "网络挂了", Toast.LENGTH_SHORT).show();
+            }
+        }
+    }
+
+    /**
+     * @param cityCode 关于cityCode的参数说明
+     *
+     *
+     */
+//https://wthrcdn.etouch.cn/WeatherApi?citykey=
+    private void queryWeatherCode(String cityCode){
+        final String address="https://wthrcdn.etouch.cn/WeatherApi?citykey="+cityCode;
+        Log.d("myWeather",address);
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+                HttpURLConnection con = null;
+                try{
+                    URL url = new URL(address);
+                    con = (HttpURLConnection)url.openConnection();
+                    con.setRequestMethod("GET");
+                    con.setConnectTimeout(8000);
+                    con.setReadTimeout(8000);
+                    InputStream in = con.getInputStream();
+                    BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+                    StringBuilder response = new StringBuilder();
+                    String str;
+                    while ((str=reader.readLine())!=null){
+                        response.append(str);
+                        Log.d("myWeather",str);
+                    }
+                    String responseStr = response.toString();
+                    Log.d("myWeather",responseStr);
+                }catch (Exception e){
+                    e.printStackTrace();
+                }finally {
+                    if(con !=null){
+                        con.disconnect();
+                    }
+                }
+            }
+        }).start();
+    }
+
+
 }