coolweather5

Posted on |

学习目的:1.将天气显示到界面上

首先在Utility类中添加解析JSON数据的方法

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
public class Utility {

  //...
    /**
     * 将返回的JSON数据解析成Weather实体类
     */
    public static Weather handleWeatherResponse(String response) {
        try {
            JSONObject jsonObject = new JSONObject(response);
            JSONArray jsonArray = jsonObject.getJSONArray("HeWeather");
            String weatherContent = jsonArray.getJSONObject(0).toString();
            return new Gson().fromJson(weatherContent, Weather.class);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

}

handleWeatherResponse()方法通过jsonObject jsonArray将天气主体内容解析出来 如下：

1
2
3
4
5
6
7
8
{
  "status"："ok",
  "basic":{},
  "aqi"：{},
  "now":{},
  "suggestion":{},
  "daily_forecast":[]
}

按照上面数据格式定义的GSON实体类，只需通过fromjson()直接将JSON数据转换成weather对象。

接下来 在活动中请求天气数据 以及将数据展示在界面上。
修改WeatherAcivity

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
package com.coolweather.android;

import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.coolweather.android.gson.Forecast;
import com.coolweather.android.gson.Weather;
import com.coolweather.android.service.AutoUpdateService;
import com.coolweather.android.util.HttpUtil;
import com.coolweather.android.util.Utility;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class WeatherActivity extends AppCompatActivity {

    public DrawerLayout drawerLayout;

    public SwipeRefreshLayout swipeRefresh;

    private ScrollView weatherLayout;

    private Button navButton;

    private TextView titleCity;

    private TextView titleUpdateTime;

    private TextView degreeText;

    private TextView weatherInfoText;

    private LinearLayout forecastLayout;

    private TextView aqiText;

    private TextView pm25Text;

    private TextView comfortText;

    private TextView carWashText;

    private TextView sportText;

    private ImageView bingPicImg;

    private String mWeatherId;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (Build.VERSION.SDK_INT >= 21) {
            View decorView = getWindow().getDecorView();
            decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            getWindow().setStatusBarColor(Color.TRANSPARENT);
        }
        setContentView(R.layout.activity_weather);
        // 初始化各控件
        bingPicImg = (ImageView) findViewById(R.id.bing_pic_img);
        weatherLayout = (ScrollView) findViewById(R.id.weather_layout);
        titleCity = (TextView) findViewById(R.id.title_city);
        titleUpdateTime = (TextView) findViewById(R.id.title_update_time);
        degreeText = (TextView) findViewById(R.id.degree_text);
        weatherInfoText = (TextView) findViewById(R.id.weather_info_text);
        forecastLayout = (LinearLayout) findViewById(R.id.forecast_layout);
        aqiText = (TextView) findViewById(R.id.aqi_text);
        pm25Text = (TextView) findViewById(R.id.pm25_text);
        comfortText = (TextView) findViewById(R.id.comfort_text);
        carWashText = (TextView) findViewById(R.id.car_wash_text);
        sportText = (TextView) findViewById(R.id.sport_text);
        swipeRefresh = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh);
        swipeRefresh.setColorSchemeResources(R.color.colorPrimary);
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        navButton = (Button) findViewById(R.id.nav_button);
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        String weatherString = prefs.getString("weather", null);
        if (weatherString != null) {
            // 有缓存时直接解析天气数据
            Weather weather = Utility.handleWeatherResponse(weatherString);
            mWeatherId = weather.basic.weatherId;
            showWeatherInfo(weather);
        } else {
            // 无缓存时去服务器查询天气
            mWeatherId = getIntent().getStringExtra("weather_id");
            weatherLayout.setVisibility(View.INVISIBLE);
            requestWeather(mWeatherId);
        }
        swipeRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                requestWeather(mWeatherId);
            }
        });
        navButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                drawerLayout.openDrawer(GravityCompat.START);
            }
        });
        String bingPic = prefs.getString("bing_pic", null);
        if (bingPic != null) {
            Glide.with(this).load(bingPic).into(bingPicImg);
        } else {
            loadBingPic();
        }
    }

    /**
     * 根据天气id请求城市天气信息。
     */
    public void requestWeather(final String weatherId) {
        String weatherUrl = "http://guolin.tech/api/weather?cityid=" + weatherId + "&key=bc0418b57b2d4918819d3974ac1285d9";
        HttpUtil.sendOkHttpRequest(weatherUrl, new Callback() {
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                final String responseText = response.body().string();
                final Weather weather = Utility.handleWeatherResponse(responseText);
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        if (weather != null && "ok".equals(weather.status)) {
                            SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this).edit();
                            editor.putString("weather", responseText);
                            editor.apply();
                            mWeatherId = weather.basic.weatherId;
                            showWeatherInfo(weather);
                        } else {
                            Toast.makeText(WeatherActivity.this, "获取天气信息失败", Toast.LENGTH_SHORT).show();
                        }
                        swipeRefresh.setRefreshing(false);
                    }
                });
            }

            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(WeatherActivity.this, "获取天气信息失败", Toast.LENGTH_SHORT).show();
                        swipeRefresh.setRefreshing(false);
                    }
                });
            }
        });
        loadBingPic();
    }


    /**
     * 处理并展示Weather实体类中的数据。
     */
    private void showWeatherInfo(Weather weather) {
        String cityName = weather.basic.cityName;
        String updateTime = weather.basic.update.updateTime.split(" ")[1];
        String degree = weather.now.temperature + "℃";
        String weatherInfo = weather.now.more.info;
        titleCity.setText(cityName);
        titleUpdateTime.setText(updateTime);
        degreeText.setText(degree);
        weatherInfoText.setText(weatherInfo);
        forecastLayout.removeAllViews();
        for (Forecast forecast : weather.forecastList) {
            View view = LayoutInflater.from(this).inflate(R.layout.forecast_item, forecastLayout, false);
            TextView dateText = (TextView) view.findViewById(R.id.date_text);
            TextView infoText = (TextView) view.findViewById(R.id.info_text);
            TextView maxText = (TextView) view.findViewById(R.id.max_text);
            TextView minText = (TextView) view.findViewById(R.id.min_text);
            dateText.setText(forecast.date);
            infoText.setText(forecast.more.info);
            maxText.setText(forecast.temperature.max);
            minText.setText(forecast.temperature.min);
            forecastLayout.addView(view);
        }
        if (weather.aqi != null) {
            aqiText.setText(weather.aqi.city.aqi);
            pm25Text.setText(weather.aqi.city.pm25);
        }
        String comfort = "舒适度：" + weather.suggestion.comfort.info;
        String carWash = "洗车指数：" + weather.suggestion.carWash.info;
        String sport = "运行建议：" + weather.suggestion.sport.info;
        comfortText.setText(comfort);
        carWashText.setText(carWash);
        sportText.setText(sport);
        weatherLayout.setVisibility(View.VISIBLE);
        Intent intent = new Intent(this, AutoUpdateService.class);
        startService(intent);
    }

}

接下来，如何从省市列表跳转到天气界面
修改ChooseAreaFragment

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
package com.coolweather.android;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.coolweather.android.db.City;
import com.coolweather.android.db.County;
import com.coolweather.android.db.Province;
import com.coolweather.android.util.HttpUtil;
import com.coolweather.android.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {

    //...

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (currentLevel == LEVEL_PROVINCE) {
                    selectedProvince = provinceList.get(position);
                    queryCities();
                } else if (currentLevel == LEVEL_CITY) {
                    selectedCity = cityList.get(position);
                    queryCounties();
                } else if (currentLevel == LEVEL_COUNTY) {
                    String weatherId = countyList.get(position).getWeatherId();
                    if (getActivity() instanceof MainActivity) {
                        Intent intent = new Intent(getActivity(), WeatherActivity.class);
                        intent.putExtra("weather_id", weatherId);
                        startActivity(intent);
                        getActivity().finish();
                    } else if (getActivity() instanceof WeatherActivity) {
                        WeatherActivity activity = (WeatherActivity) getActivity();
                        activity.drawerLayout.closeDrawers();
                        activity.swipeRefresh.setRefreshing(true);
                        activity.requestWeather(weatherId);
                    }
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (currentLevel == LEVEL_COUNTY) {
                    queryCities();
                } else if (currentLevel == LEVEL_CITY) {
                    queryProvinces();
                }
            }
        });
        queryProvinces();
    }

}

onItemClick()加拉一个if判断 当前级别是LEVEL_COUNTY 就启动WeatherActivity 把当前选择县的id传过去

还需在MainActivit加入缓存数据判断

MainActivit

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        if (prefs.getString("weather", null) != null) {
            Intent intent = new Intent(this, WeatherActivity.class);
            startActivity(intent);
            finish();
        }
    }

}

现在onCreate()方法一开始先从SharedPreferences文件中读取数据 不为null就说明之前请求过天气数据 直接跳转到WeatherActivity即可