Android项目之天气预报 的实现分析

Android项目之天气预报 的实现分析

package com.example.weather.util;

public interface HttpCallbackListener {
void onFinish(String response);
void onError(Exception e);
}

package com.example.weather.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.util.Log;

public class HttpUtil {
public static void sendHttpRequest(final String address, final HttpCallbackListener listener) {
new Thread(new Runnable() {
public void run() {
HttpURLConnection connection = null;
try {
URL url = new URL(address);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
connection.setDoInput(true);
connection.setDoOutput(true);
InputStream in = connection.getInputStream();
BufferedReader reader =
new BufferedReader(new InputStreamReader(in));
StringBuilder response = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}
if (listener != null) {
// 回调 onFinish()方法
listener.onFinish(response.toString());
}
} catch (Exception e) {
if (listener != null) {
// 回调 onError()方法
listener.onError(e);
}
} finally {
if (connection != null) {
connection.disconnect();
}
}
}
}).start();
}
}

package com.example.weather.test;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import com.example.weather.util.HttpCallbackListener;
import com.example.weather.util.HttpUtil;

import android.test.AndroidTestCase;

public class WeatherGetTest  extends AndroidTestCase{
public void testGetData(){
String cityName;
try {
cityName = URLEncoder.encode("菏泽", "utf-8");
String  weatherUrl="http://v.juhe.cn/weather/index?format=2&cityname="+cityName+"&key=ab9d7e2007472d723baf71fcdc4ba094";

HttpUtil.sendHttpRequest(weatherUrl, new HttpCallbackListener() {

public void onFinish(String response) {
// TODO Auto-generated method stub
System.out.println(response);
}

public void onError(Exception e) {
// TODO Auto-generated method stub

}
});
}catch (Exception e) {
// TODO: handle exception
}

}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/city"
tools:context=".WeatherActivity" >

<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >

<EditText
android:id="@+id/etCity"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginTop="20dp"
android:layout_weight="1"
android:background="@android:drawable/edit_text"
android:drawableLeft="@drawable/etcity"
android:drawablePadding="5dp"
android:ems="10"
android:hint="@string/etCity" >

<requestFocus />
</EditText>

<ImageButton
android:id="@+id/btnQuery"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginTop="20dp"
android:background="@null"
android:src="@drawable/serch" />
</LinearLayout>

<ListView
android:id="@+id/lvFutureWeather"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/linearLayout1"
android:layout_centerHorizontal="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:dividerHeight="10dp"
android:layoutAnimation="@anim/weather_list_layout_animation" >
</ListView>

<span style="color:#ff0000;"></RelativeLayout></span>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="@drawable/list_item_shape"
android:padding="10dp" >

<TextView
android:id="@+id/tvDayofWeek"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:text="星期日" />

<TextView
android:id="@+id/tvDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/tvDayofWeek"
android:layout_alignBottom="@+id/tvDayofWeek"
android:layout_alignParentRight="true"
android:text="20160207" />

<TextView
android:id="@+id/tvTemperature"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvDayofWeek"
android:layout_below="@+id/tvDayofWeek"
android:layout_marginTop="15dp"
android:text="temperature" />

<TextView
android:id="@+id/tvWeather"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvTemperature"
android:layout_below="@+id/tvTemperature"
android:layout_marginTop="15dp"
android:text="weather" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

<scale
android:duration="1000"
android:fromXScale="0.0"
android:fromYScale="0.0"
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:toXScale="1.0"
android:toYScale="1.0" />

</set>

<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
android:animation="@anim/weather_list_animation"
android:animationOrder="normal"
android:delay="2" /></span>

package com.example.weather.moder;

public class Weather {
private String dayOfWeek;//星期几
private String date;//日期
private String temperature;//温度
private String weather;//天气
public Weather(){
}
public Weather(String dayOfWeek, String date, String temperature,
String weather) {
super();
this.dayOfWeek = dayOfWeek;
this.date = date;
this.temperature = temperature;
this.weather = weather;
}
public String getDayOfWeek() {
return dayOfWeek;
}
public void setDayOfWeek(String dayOfWeek) {
this.dayOfWeek = dayOfWeek;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getTemperature() {
return temperature;
}
public void setTemperature(String temperature) {
this.temperature = temperature;
}
public String getWeather() {
return weather;
}
public void setWeather(String weather) {
this.weather = weather;
}
@Override
public String toString() {
return "Weather [dayOfWeek=" + dayOfWeek + ", date=" + date
+ ", temperature=" + temperature + ", weather=" + weather + "]";
}

}

package com.example.weather.adapter;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import com.example.weather.R;
import com.example.weather.moder.Weather;

/**
* 天气适配器
* @author zhupeng
*
*/
public class WeatherAdapter extends ArrayAdapter<Weather> {
private int resourceId;
public WeatherAdapter(Context context, int textViewResourceId,
List<Weather> objects) {
super(context, textViewResourceId, objects);
resourceId = textViewResourceId;
}
@Override
public View getView(int position, View convertView, ViewGroup viewgroup) {
Weather weather=getItem(position);
ViewHolder viewHolder=null;
if(convertView==null){
viewHolder=new ViewHolder();
convertView=LayoutInflater.from(getContext()).inflate(resourceId, null);
viewHolder.tvDayOfWeek=(TextView)
convertView.findViewById(R.id.tvDayofWeek);
viewHolder.tvDate=(TextView) convertView.findViewById(R.id.tvDate);
viewHolder.tvTemperature=(TextView) convertView.findViewById(R.id.tvTemperature);
viewHolder.tvWeather=(TextView) convertView.findViewById(R.id.tvWeather);
convertView.setTag(viewHolder);
}else{
viewHolder=(ViewHolder) convertView.getTag();
}
viewHolder.tvDayOfWeek.setText(weather.getDayOfWeek());
viewHolder.tvDate.setText(weather.getDate());
viewHolder.tvTemperature.setText(weather.getTemperature());
viewHolder.tvWeather.setText(weather.getWeather());
return convertView;
}
private class ViewHolder{
TextView tvDayOfWeek;
TextView tvDate;
TextView tvTemperature;
TextView tvWeather;
}
}

<span style="font-size:18px;">package com.example.weather;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import com.example.weather.adapter.WeatherAdapter;
import com.example.weather.moder.Weather;
import com.example.weather.util.HttpCallbackListener;
import com.example.weather.util.HttpUtil;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.LayoutAnimationController;
import android.view.animation.ScaleAnimation;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;
public class WeatherActivity extends Activity {
private EditText ecCity;
private ImageButton btnQuery;
private ListView lvFutureWeather;
public static final int SHOW_RESPONSE=1;
private List<Weather> data;
private Handler handler=new Handler(){
public void handleMessage(Message msg){
switch (msg.what) {
case SHOW_RESPONSE:
String response=(String )msg.obj;
if(response!=null){
parseWithJSON(response);
WeatherAdapter weatherAdapter=new WeatherAdapter
(WeatherActivity.this,
R.layout.activity_weather_listitem, data);
lvFutureWeather.setAdapter(weatherAdapter);
ScaleAnimation scaleAnimation=new ScaleAnimation(0,1,0,1);
scaleAnimation.setDuration(1000);
LayoutAnimationController animationController  =  new
LayoutAnimationController(
scaleAnimation, 0.6f);
lvFutureWeather.setLayoutAnimation(animationController);

}
break;

default:
break;
}
}

private void parseWithJSON(String response) {
// TODO Auto-generated method stub
data=new ArrayList<Weather>();
JsonParser parser=new JsonParser();//json解析器
JsonObject obj=(JsonObject) parser.parse(response);
//获取返回状态吗
String resultcode=obj.get("resultcode").getAsString();
//状态码如果是200说明数据返回成功
if(resultcode!=null&&resultcode.equals("200")){
JsonObject resultObj=obj.get("result").getAsJsonObject();
JsonArray futureWeatherArray=resultObj.get("future").getAsJsonArray();
for(int i=0;i<futureWeatherArray.size();i++){
Weather  weather=new Weather();
JsonObject weatherObject=futureWeatherArray.get(i).getAsJsonObject();
weather.setDayOfWeek(weatherObject.get("week").getAsString());
weather.setDate(weatherObject.get("date").getAsString());
weather.setTemperature(weatherObject.get("temperature")
.getAsString());
weather.setWeather(weatherObject.get("weather")
.getAsString());
data.add(weather);
}
}
}

};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_weather);
initViews();
setListeners();

}
public void initViews(){
ecCity=(EditText) findViewById(R.id.etCity);
btnQuery=(ImageButton)findViewById(R.id.btnQuery);
lvFutureWeather=(ListView) findViewById(R.id.lvFutureWeather);
data=new ArrayList<Weather>();
}
private void setListeners(){
btnQuery.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
String cityName=ecCity.getText().toString();
try {
cityName = URLEncoder.encode("菏泽", "utf-8"); //这里我弄成默认的城市了，如果想根据输入的值进行搜索，，，可以把这句话换成cityName = URLEncoder.encode(cityName, "utf-8");

} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
System.out.println("lvFutureWeather="+lvFutureWeather);
Toast.makeText(WeatherActivity.this, "success",
Toast.LENGTH_LONG).show();
String weatherUrl = "http://v.juhe.cn/weather/index?format=2&cityname="+cityName+"&key=ab9d7e2007472d723baf71fcdc4ba094";
Toast.makeText(WeatherActivity.this, "success"+weatherUrl,
Toast.LENGTH_LONG).show();
HttpUtil.sendHttpRequest(weatherUrl, new HttpCallbackListener() {

public void onFinish(String response) {
// TODO Auto-generated method stub
Message message=new Message();
message.what=SHOW_RESPONSE;
//将服务器返回的结果存放到Message中
message.obj=response.toString();
handler.sendMessage(message);
}

public void onError(Exception e) {
// TODO Auto-generated method stub
System.out.println("访问失败");
}
});
}
});
}

}</span><strong>
</strong>

<span style="font-size:18px;">cityName = URLEncoder.encode("菏泽", "utf-8");</span>