[ {"temp":"20℃/30℃","weather":"多云","name":"重庆","pm":"80","wind":"1级"},
  {"temp":"15℃/24℃","weather":"晴","name":"北京","pm":"265","wind":"3级"},
  {"temp":"26℃/32℃","weather":"多云","name":"成都","pm":"30","wind":"2级"}]

<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="广州"
        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_cq"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="重庆"/>
        <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_cd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="成都"/>
    </LinearLayout>
</RelativeLayout>

package com.temp.administrator.weathegetfromjson;

public class WeatherInfo {
    private String id;
    private String temp;
    private String weather;
    private String name;
    private String pm;
    private String wind;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getTemp() {
        return temp;
    }

    public void setTemp(String temp) {
        this.temp = temp;
    }

    public String getWeather() {
        return weather;
    }

    public void setWeather(String weather) {
        this.weather = weather;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPm() {
        return pm;
    }

    public void setPm(String pm) {
        this.pm = pm;
    }

    public String getWind() {
        return wind;
    }

    public void setWind(String wind) {
        this.wind = wind;
    }
}

package com.temp.administrator.weathegetfromjson;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private TextView tvCity;
    private TextView tvWeather;
    private TextView tvTemp;
    private TextView tvWind;
    private TextView tvPm;
    private ImageView ivIcon;
    private Map<String, String> map;
    private List<Map<String, String>> list;
    private String temp, weather, name, pm, wind;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        try {
           InputStream is = this.getResources().openRawResource(R.raw.weather1);
            List<WeatherInfo> weatherInfos = WeatherService.getInfosFromJson(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, "解析失败", Toast.LENGTH_SHORT).show();
        }
        getMap(1, R.drawable.sun);
    }
    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_cq).setOnClickListener(this);
        findViewById(R.id.btn_bj).setOnClickListener(this);
        findViewById(R.id.btn_cd).setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {    //按钮的点击事件
        switch (v.getId()) {
            case R.id.btn_cq:
                getMap(0, R.drawable.cloud_sun);
                break;
            case R.id.btn_bj:
                getMap(1, R.drawable.sun);
                break;
            case R.id.btn_cd:
                getMap(2, R.drawable.clouds);
                break;
        }
    }
   
    private void getMap(int number, int iconNumber) {
        Map<String, String> 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);
    }
}