Android应用
11 分钟 读完 (大约 1644 个字)

《Android 应用 之路》 天气预报（五）

前言

写了上一篇文章，讲了下这个实现天气预报的使用内容，现在又到了看代码的时候，主要还是贴代码，然后添加足够的注释。

聚合数据SDK配置

  • 将juhe_sdk_v_X_X.jar以及armeabi文件夹(内包含libJuheSDK_v_X_X.so)添加到工程中libs文件夹下
  • 打开Moudle setting -> app -> Dependencies,添加juhe_sdk_v_X_X.jar,
  • 在AndroidManifest.xml中,加入所需权限: 
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<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
  • 添加所申请的openid(这个是在Juhe官网上申请的).在继承Application类之后, 在AndroidManifest.xml中,加入android:name属性,值为继承Application的类的路径.
  • 初始化聚合数据SDK
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import android.app.Application;

public class MyApplication extends Application {

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		JuheSDKInitializer.initialize(getApplicationContext());
	}
}

工程代码

MyApplication.java

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package com.onlyloveyd.weather;
import android.app.Application;
import com.thinkland.sdk.android.JuheSDKInitializer;
public class MyApplication extends Application {
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        JuheSDKInitializer.initialize(getApplicationContext());//初始化Juhe数据SDK
    }
}

城市选择界面
ChooseCityActivity.java

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package com.onlyloveyd.weather;
import ......;

public class ChooseCityActivity extends Activity {

    public static final String TAG = "ChooseCityActivity";
    @Bind(R.id.tv_choose_city_title)
    TextView tvChooseCityTitle;
    @Bind(R.id.et_search_city)
    EditText etSearchCity;
    @Bind(R.id.tv_hotcity)
    TextView tvHotcity;
    @Bind(R.id.gv_hotcity)
    GridView gvHotcity;

    private ArrayList<CityItem> mSupportCityList;//所有城市List
    private ArrayList<CityItem> mSearchCityList;//城市查询结果List
    private CityAdapter mCityAdapter;//城市GridView的Adapter

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.citylist);//城市选择界面
        ButterKnife.bind(this);//依赖注入

        mSupportCityList = new ArrayList<CityItem>();
        mSearchCityList = new ArrayList<CityItem>();
        //设置带shape模式的编辑框的背景颜色
        //GradientDrawable myGrad = (GradientDrawable)mSearchEditView.getBackground();
        //myGrad.setColor(getResources().getColor(R.color.choosecitysearchbackground));
        //给城市名编译框添加文本变化的观察者
        etSearchCity.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { }
            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                mSearchCityList.clear();//城市查询结果list清空
                String searchkey = charSequence.toString();

                Log.e(TAG, " city size " + mSupportCityList.size());
                for (int j = 0; j < mSupportCityList.size(); j++) {
                    CityItem item = mSupportCityList.get(j);
                    if (searchkey.contains(item.getDistrict()) || item.getDistrict().contains(searchkey)) {//遍历查询
                        mSearchCityList.add(item);
                    }
                }
                mCityAdapter.setCityList(mSearchCityList);
                mCityAdapter.notifyDataSetChanged();
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });
        mCityAdapter = new CityAdapter(this, mSupportCityList);
        gvHotcity.setAdapter(mCityAdapter);
        getSupportCity(this);
    }

    private void getSupportCity(Context context) {
     /**Juhe SDK 封装的方法
     * 请求的方法 参数: 第一个参数 当前请求的context 第二个参数 接口id 第三二个参数 接口请求的url 第  四个参数 接口请求的方式
     * 第五个参数 接口请求的参数,键值对com.thinkland.sdk.android.Parameters类型; 第六个参数
     * 请求的回调方法,com.thinkland.sdk.android.DataCallBack;
     * 
     */
        JuheData.executeWithAPI(context, 39, "http://v.juhe.cn/weather/citys", JuheData.GET, null, new DataCallBack() {
            @Override
            public void onSuccess(int statusCode, String responseString) {
                try {
                    //解析JSON数据
                    JSONObject jsonObject = new JSONObject(responseString);
                    JSONArray result = jsonObject.getJSONArray("result");
                    for (int i = 0; i < result.length(); i++) {
                        JSONObject object = (JSONObject) result.get(i);
                        CityItem item = new CityItem(object.getString("id"), object.getString("province"), object.getString("city"), object.getString("district"));
                        mSupportCityList.add(item);//查询结果添加
                        mCityAdapter.notifyDataSetChanged();//notify数据变化
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onFinish() {
            }

            @Override
            public void onFailure(int statusCode, String responseString, Throwable throwable) {
                Log.e(TAG, responseString);
            }
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onPause() {
        etSearchCity.setText(null);//避免onBackPress的时候编辑框中还有数据
        super.onPause();
    }
}

聚合数据针对支持的城市返回的JSON数据格式为
{
“resultcode”:“200”,
“reason”:“successed”,
“result”:[ {
“id”:“1”, /城市ID/ “province”:“北京”,/省份名称/ “city”:“北京”, /城市/ “district”:“北京” /城市/区名称/ },
{
“id”:“2”,
“province”:“北京”,
“city”:“北京”,
“district”:“海淀”
},
}
}
按照这种格式解析出JSON数据

//天气显示界面
WeatherActivity.java

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package com.onlyloveyd.weather;
import XXXX;

public class WeatherActivity extends Activity {

    private static final String TAG = "MainActivity";
    @Bind(R.id.imageview)
    ImageView imageview;
    @Bind(R.id.tv_cityname)
    TextView tvCityname;
    @Bind(R.id.tv_date)
    TextView tvDate;
    @Bind(R.id.iv_zhengfu)
    ImageView ivZhengfu;
    @Bind(R.id.iv_tenth)
    ImageView ivTenth;
    @Bind(R.id.iv_geth)
    ImageView ivGeth;
    @Bind(R.id.iv_du)
    ImageView ivDu;
    @Bind(R.id.iv_weather_fa)
    ImageView ivWeatherFa;
    @Bind(R.id.tv_weather)
    TextView tvWeather;
    @Bind(R.id.iv_weather_fb)
    ImageView ivWeatherFb;
    @Bind(R.id.tv_temp)
    TextView tvTemp;
    @Bind(R.id.tv_humidity)
    TextView tvHumidity;
    @Bind(R.id.tv_wind)
    TextView tvWind;
    @Bind(R.id.tv_refreshtime)
    TextView tvRefreshtime;
    @Bind(R.id.gv_future)
    GridView gvFuture;
    WeatherInfo.ResultBean.SkBean mSk;
    WeatherInfo.ResultBean.TodayBean mToday;
    FutureAdapter mFutureAdapter;
    ArrayList<WeatherInfo.ResultBean.FutureBean> mFutureList;
    private Context mContext;
    private String mCityName = null;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mContext = this;

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.weather);
        ButterKnife.bind(this);//依赖注入
        Intent intent = getIntent();
        mCityName = intent.getStringExtra("cityname");//从选择城市界面选择城市传递到这个Activity

        mFutureList = new ArrayList<WeatherInfo.ResultBean.FutureBean>();//未来7天预报的List
        mFutureAdapter = new FutureAdapter(this, mFutureList);//未来天气预报的GridView的Adapter
        gvFuture.setAdapter(mFutureAdapter);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mFutureList.clear();
        getWeatherInfoByCity(this, mCityName);//查询天气信息，包含的内容比较多，速度还算快，没有单独使用线程
        tvCityname.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onBackPressed();
            }
        });
    }


    private void getWeatherInfoByCity(Context context, String city) {

        Log.e(TAG, "getWeatherInfoByCity");
        Parameters param = new Parameters();
        param.add("cityname", city);
        param.add("format", 2);

        JuheData.executeWithAPI(context, 39, "http://v.juhe.cn/weather/index", JuheData.GET, param, new DataCallBack() {
            @Override
            public void onSuccess(int statusCode, String responseString) {
                Gson gson = new Gson();
                try {
                    JSONObject jsonObject = new JSONObject(responseString);
                    JSONObject resultjson = jsonObject.getJSONObject("result");
                    JSONObject skjson = resultjson.getJSONObject("sk");
                    JSONObject todayjson = resultjson.getJSONObject("today");
                    JSONArray futurejson = resultjson.getJSONArray("future");
                    mSk = gson.fromJson(skjson.toString(), WeatherInfo.ResultBean.SkBean.class);
                    mToday = gson.fromJson(todayjson.toString(), WeatherInfo.ResultBean.TodayBean.class);
                    Log.e(TAG, futurejson.get(2).toString());
                    for (int i = 0; i < futurejson.length(); i++) {
                        WeatherInfo.ResultBean.FutureBean futureBean = gson.fromJson(futurejson.get(i).toString(), WeatherInfo.ResultBean.FutureBean.class);
                        Log.e(TAG, futureBean.toString());
                        mFutureList.add(futureBean);
                    }
                    mFutureAdapter.setmFutureList(mFutureList);
                    gvFuture.setAdapter(mFutureAdapter);
                    mFutureAdapter.notifyDataSetChanged();

                    tvCityname.setText(mCityName);
                    tvDate.setText(mToday.getDate_y() + " " + mToday.getWeek());
                    tvWeather.setText(mToday.getWeather());
                    tvTemp.setText(mToday.getTemperature());
                    tvHumidity.setText(mSk.getHumidity());
                    tvWind.setText(mSk.getWind_direction() + " " + mSk.getWind_strength());
                    tvRefreshtime.setText(getString(R.string.refreshtimesuffix) + mSk.getTime());

                    String fa = mToday.getWeather_id().getFa();
                    String fb = mToday.getWeather_id().getFb();
                    if (fa.equals(fb)) {
                        ivWeatherFa.setImageResource(getWeatherDrawableByWeatherId("w_", fa));
                        ivWeatherFb.setImageDrawable(null);
                    } else {
                        ivWeatherFa.setImageResource(getWeatherDrawableByWeatherId("w_", fa));
                        ivWeatherFb.setImageResource(getWeatherDrawableByWeatherId("w_", fb));
                    }

                    int tmp = Integer.valueOf(mSk.getTemp());
                    if (tmp < 0) {
                        ivZhengfu.setImageResource(R.drawable.fuhao);
                        int tenth = (0 - tmp) / 10;
                        int geth = (0 - tmp) % 10;
                        ivTenth.setImageResource(getWeatherDrawableByWeatherId("org4_widget_nw", String.valueOf(tenth)));
                        ivGeth.setImageResource(getWeatherDrawableByWeatherId("org4_widget_nw", String.valueOf(geth)));
                    } else {
                        ivZhengfu.setImageDrawable(null);
                        int tenth = tmp / 10;
                        int geth = tmp % 10;
                        ivTenth.setImageResource(getWeatherDrawableByWeatherId("org4_widget_nw", String.valueOf(tenth)));
                        ivGeth.setImageResource(getWeatherDrawableByWeatherId("org4_widget_nw", String.valueOf(geth)));
                    }

                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }

            @Override
            public void onFinish() {
                // TODO Auto-generated method stub
                //Toast.makeText(getApplicationContext(), "finish", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailure(int statusCode, String responseString, Throwable throwable) {
                // TODO Auto-generated method stub
                Log.e(TAG, responseString);
            }
        });
    }

    private int getWeatherDrawableByWeatherId(String suffix, String fa) {
        String res = suffix + fa;
        int resid = getResources().getIdentifier(res, "drawable", getPackageName());
        return resid;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        final int action = event.getAction();
        float startX = 0;

        switch (action) {
            case MotionEvent.ACTION_DOWN:
                startX = event.getRawX();
                break;
            case MotionEvent.ACTION_UP:
                float endX = event.getRawX();
                if ((int) (endX - startX) > 10) {
                    onBackPressed();
                }
                break;
            default:
                break;
        }

        return true;
    }
}

具体的内容请查阅源代码：

https://code.csdn.net/poorkick/weatherclient/tree/master

有看不懂的内容可以留言，晚上统一回复。
介绍一个Intellij插件 —– Gson Format, 通过Json格式快速生成Java Bean类，提高开发效率
其实有很多很好用的插件可供选择，不仅可以提高效率，还可以增加自己对开发的兴趣，可以去多了解一下。

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FileProvider 1
Flutter 1
Fragment 4
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