安卓中实现天气预报

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import java.util.HashMap;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
    private Map<String,String> map;
    private List<Map<String,String>> list;
    private String temp,weather,name,pm,wind;
    private TextView tvCity;
    private TextView tvWeather;
    private TextView tvTemp;
    private TextView tvWind;
    private TextView tvPm;
    private ImageView ivIcon;
    private List<Weatherinfo> weatherInfos;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        try {
            InputStream is =this.getResources().openRawResource(R.raw.weather1);
            weatherInfos = WeatherService.getInfoFromXML(is);
            list = new ArrayList<Map<String,String>>();
            for (Weatherinfo info : weatherInfos){
                map = new HashMap<String, String>();
                map.put("temp",info.getTemp());
                map.put("weather",info.getWeather());
                map.put("name",info.getName());
                map.put("pm",info.getPm());
                map.put("wind",info.getWind());
                list.add(map);
            }
        } catch (Exception e) {
            e.printStackTrace();
            Toast.makeText(this,"解析信息失败",Toast.LENGTH_SHORT).show();
        }
        getMap(1,R.drawable.sun);
    }

    private void getMap(int number, int iconNumber) {
        Weatherinfo weatherinfo = weatherInfos.get(number);
        String temp = weatherinfo.getTemp();
        String name = weatherinfo.getName();
        String weather = weatherinfo.getWeather();
        String pm = weatherinfo.getPm();
        String wind = weatherinfo.getWind();
        tvCity.setText(name);
        tvPm.setText("pm :"+pm);
        tvTemp.setText(temp);
        tvWind.setText("风力 :"+wind);
        tvCity.setText(name);
        tvWeather.setText(weather);
        ivIcon.setImageResource(iconNumber);

       /* Map cityMap = list.get(number);
        temp = cityMap.get("temp");
        weather = cityMap.get("weather");
        name = cityMap.get("name");
        pm = cityMap.get("pm");
        wind = cityMap.get("wind");
        tvCity.setText(name);
        tvWeather.setText(weather);
        tvTemp.setText(""+temp);
        tvWind.setText("风力 :"+wind);
        tvPm.setText("pm :"+pm);
        ivIcon.setImageResource(iconNumber);*/
    }

    private void initView() {
        tvCity = (TextView) findViewById(R.id.tv_city);
        tvWeather = (TextView) findViewById(R.id.tv_weather);
        tvTemp = (TextView) findViewById(R.id.tv_temp);
        tvWind = (TextView) findViewById(R.id.tv_wind);
        tvPm = (TextView) findViewById(R.id.tv_pm);
        ivIcon = (ImageView) findViewById(R.id.iv_icon);
        findViewById(R.id.btn_sh).setOnClickListener(this);
        findViewById(R.id.btn_bj).setOnClickListener(this);
        findViewById(R.id.btn_gz).setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_sh:
                getMap(0,R.drawable.cloud_sun);
                break;
            case R.id.btn_bj:
                getMap(1,R.drawable.sun);
                break;
            case R.id.btn_gz:
                getMap(2,R.drawable.clouds);
                break;
        }
    }
}

MainActivity.java

import android.util.Xml;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

/**
 * create by hxc
 */

public class WeatherService {
    //解析XML文件
    public static List<Weatherinfo> getInfoFromXML(InputStream is) throws XmlPullParserException, IOException {

        XmlPullParser parser = Xml.newPullParser();
        parser.setInput(is, "UTF-8");
        Weatherinfo weatherinfo = null;
        List<Weatherinfo> weatherinfos = null;
        //获取当前的类型
        int type = parser.getEventType();
        while (type != XmlPullParser.END_DOCUMENT) {
            switch (type) {
                case XmlPullParser.START_TAG:
                    if ("infos".equals(parser.getName())) {
                        weatherinfos = new ArrayList<Weatherinfo>();
                    } else if ("city".equals(parser.getName())) {
                        weatherinfo = new Weatherinfo();
                        String idStr = parser.getAttributeValue(0);
                        weatherinfo.setId(idStr);
                    } else if ("temp".equals(parser.getName())) {
                        String temp = parser.nextText();
                        weatherinfo.setTemp(temp);
                    } else if ("weather".equals(parser.getName())) {
                        String weather = parser.nextText();
                        weatherinfo.setWeather(weather);
                    } else if ("name".equals(parser.getName())) {
                        String name = parser.nextText();
                        weatherinfo.setName(name);
                    } else if ("pm".equals(parser.getName())) {
                        String pm = parser.nextText();
                        weatherinfo.setPm(pm);
                    } else if ("wind".equals(parser.getName())) {
                        String wind = parser.nextText();
                        weatherinfo.setWind(wind);
                    }
                    break;
                case XmlPullParser.END_TAG:
                    if ("city".equals(parser.getName())) {
                        weatherinfos.add(weatherinfo);
                        weatherinfo = null;
                    }
                    break;

            }
            type = parser.next();
        }

        return weatherinfos;
    }
    public static List<Weatherinfo> getInfosFromJson(InputStream is) throws IOException{
        byte[] buffer = new byte[is.available()];
        is.read(buffer);
        String json = new String(buffer,"utf-8");
        //使用Gson库解析JSON数据
        Gson gson = new Gson();
        Type listType = new TypeToken<List<Weatherinfo>>(){}.getType();
        List<Weatherinfo> weatherinfos = gson.fromJson(json,listType);
        return weatherinfos;
    }
}

WeatherService.java

<?xml version="1.0" encoding="utf-8"?>
<infos>
    <city id="sh">
        <temp>20"C/30C</ temp>
        <weather>晴转多云</weather>
        <name>上海</name>
        <pm>80</pm>
        <wind>1级</wind>
    </city>
    <city id="bj">
        <temp>26C/32"C</temp>
        <weather>晴</weather>
        <name>北京</name>
        <pm>98</pm>
        <wind>3级</wind>
    </city>
    <city id="gz">
        <temp>15'C/24C</ temp>
        <weather>多云</weather>
        <name>广州</ name>
        <pm>30</pm>
        <wind>5级</wind>
    </city>
</infos>

weather.xml

<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/weather"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/tv_city"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/tv_weather"
        android:layout_alignParentTop="true"
        android:layout_alignRight="@+id/tv_weather"
        android:layout_marginTop="39dp"
        android:text="上海"
        android:textSize="50sp"/>
    <ImageView
        android:id="@+id/iv_icon"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_alignLeft="@+id/ll_btn"
        android:layout_alignStart="@+id/ll_btn"
        android:layout_below="@+id/tv_city"
        android:layout_marginLeft="44dp"
        android:layout_marginStart="44dp"
        android:layout_marginTop="42dp"
        android:paddingBottom="5dp"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/tv_weather"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/iv_icon"
        android:layout_below="@+id/iv_icon"
        android:layout_marginRight="15dp"
        android:layout_marginTop="18dp"
        android:gravity="center"
        android:text="多云"
        android:textSize="18sp"/>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/iv_icon"
        android:layout_marginLeft="39dp"
        android:layout_marginStart="39dp"
        android:layout_toEndOf="@+id/iv_icon"
        android:layout_toRightOf="@+id/iv_icon"
        android:gravity="center"
        android:orientation="vertical">
        <TextView
            android:id="@+id/tv_temp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:gravity="center_vertical"
            android:text="-7℃"
            android:textSize="22sp"/>
        <TextView
            android:id="@+id/tv_wind"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="风力:3级"
            android:textSize="18sp"/>
        <TextView
            android:id="@+id/tv_pm"
            android:layout_width="73dp"
            android:layout_height="wrap_content"
            android:text="pm"
            android:textSize="18sp"/>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/ll_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal">
        <Button
            android:id="@+id/btn_bj"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="北京"/>
        <Button
            android:id="@+id/btn_sh"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上海"/>
        <Button
            android:id="@+id/btn_gz"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="广州"/>
    </LinearLayout>
</RelativeLayout>

activity_main.xml

<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/weather"
    tools:context=".MainActivity">
    <TextView
        android:id="@+id/tv_city"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/tv_weather"
        android:layout_alignParentTop="true"
        android:layout_alignRight="@+id/tv_weather"
        android:layout_marginTop="39dp"
        android:text="上海"
        android:textSize="50sp"/>
    <ImageView
        android:id="@+id/iv_icon"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_alignLeft="@+id/ll_btn"
        android:layout_alignStart="@+id/ll_btn"
        android:layout_below="@+id/tv_city"
        android:layout_marginLeft="44dp"
        android:layout_marginStart="44dp"
        android:layout_marginTop="42dp"
        android:paddingBottom="5dp"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/tv_weather"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/iv_icon"
        android:layout_below="@+id/iv_icon"
        android:layout_marginRight="15dp"
        android:layout_marginTop="18dp"
        android:gravity="center"
        android:text="多云"
        android:textSize="18sp"/>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/iv_icon"
        android:layout_marginLeft="39dp"
        android:layout_marginStart="39dp"
        android:layout_toEndOf="@+id/iv_icon"
        android:layout_toRightOf="@+id/iv_icon"
        android:gravity="center"
        android:orientation="vertical">
        <TextView
            android:id="@+id/tv_temp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:gravity="center_vertical"
            android:text="-7℃"
            android:textSize="22sp"/>
        <TextView
            android:id="@+id/tv_wind"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="风力:3级"
            android:textSize="18sp"/>
        <TextView
            android:id="@+id/tv_pm"
            android:layout_width="73dp"
            android:layout_height="wrap_content"
            android:text="pm"
            android:textSize="18sp"/>
    </LinearLayout>
    <LinearLayout
        android:id="@+id/ll_btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:orientation="horizontal">
        <Button
            android:id="@+id/btn_bj"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="北京"/>
        <Button
            android:id="@+id/btn_sh"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上海"/>
        <Button
            android:id="@+id/btn_gz"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="广州"/>
    </LinearLayout>
</RelativeLayout>