编写简易Android天气应用的代码示例

//调用Presenter的方法获取数据 
mMainPresenter = new MainPresenterImpl(this); 
mMainPresenter.getPlaceData(); 
mMainPresenter.getWeatherData("成都"); 

//显示主页和右侧栏天气数据 
public void setupWeatherData(WeatherResponse weatherResponse) { 
  if (weatherResponse == null) return; 
  setTitleText(DateUtils.getWeekDay(weatherResponse.date)); 
  if (weatherResponse.results != null && weatherResponse.results.size() > 0) { 
    WeatherResult result = weatherResponse.results.get(0); 
    mTvCity.setText(getString(R.string.city, result.currentCity)); 
    mTvPm25.setText(getString(R.string.pm25, result.pm25)); 
 
    mWeatherDataAdapter.setData(result.weather_data); 
    mWeatherDataAdapter.notifyDataSetChanged(); 
 
    mWeatherExtraAdapter.setData(result.index); 
    mWeatherExtraAdapter.notifyDataSetChanged(); 
  } 
} 

//显示左侧栏城市列表 
@Override 
public void setupPlaceData(List<Place> placeList) { 
  if (placeList == null) { 
    return; 
  } 
  mPlaceAdapter.setData(placeList); 
  mPlaceAdapter.notifyDataSetChanged(); 
} 

//获取天气数据 
@Override 
public void getWeatherData(String place) { 
  if (TextUtils.isEmpty(place)) { 
    return; 
  } 
  mMainView.showProgress(); 
  ServiceManager.getInstance().getApiService().getWeatherInfo(place, Constants.BAIDU_AK) 
      .subscribeOn(Schedulers.io()) 
      .observeOn(AndroidSchedulers.mainThread()) 
      .subscribe(new Subscriber<WeatherResponse>() { 
        @Override 
        public void onCompleted() { 
          Log.e(TAG, "onCompleted"); 
          mMainView.hideProgress(); 
        } 
 
        @Override 
        public void onError(Throwable e) { 
          Log.e(TAG, e.getMessage(), e); 
          mMainView.hideProgress(); 
        } 
 
        @Override 
        public void onNext(WeatherResponse weatherResponse) { 
          mMainView.setupWeatherData(weatherResponse); 
        } 
      }); 
} 

public interface ApiService { 
 
  /*@GET("service/getIpInfo.php") 
  Call<GetIpInfoResponse> getIpInfo(@Query("ip") String ip);*/ 
 
  @GET("service/getIpInfo.php") 
  Observable<GetIpInfoResponse> getIpInfo(@Query("ip") String ip); 
 
 
  //http://api.map.baidu.com/telematics/v3/weather?location=%E6%88%90%E9%83%BD&output=json&ak=MPDgj92wUYvRmyaUdQs1XwCf 
  @GET("/telematics/v3/weather?output=json") 
  Observable<WeatherResponse> getWeatherInfo(@Query("location") String location, @Query("ak") String ak); 
} 

@Override 
public void getPlaceData() { 
  PlaceRepository repository = new PlaceRepository(); 
  repository.getPlaceList(BaseApplication.getInstance()) 
      .subscribeOn(Schedulers.io()) 
      .observeOn(AndroidSchedulers.mainThread()) 
      .subscribe(new Subscriber<List<Place>>() { 
        @Override 
        public void onNext(List<Place> places) { 
          mMainView.setupPlaceData(places); 
        } 
 
        @Override 
        public void onCompleted() { 
 
        } 
 
        @Override 
        public void onError(Throwable e) { 
 
        } 
      }); 
} 

public class PlaceRepository { 
 
  public Observable<List<Place>> getPlaceList(final Context context) { 
    return Observable.create(new Observable.OnSubscribe<List<Place>>() { 
      @Override 
      public void call(Subscriber<? super List<Place>> subscriber) { 
        try { 
          AssetManager assertManager = context.getAssets(); 
          InputStream inputStream = assertManager.open("place"); 
          ByteArrayOutputStream outStream = new ByteArrayOutputStream(); 
          byte[] data = new byte[1024]; 
          int count = -1; 
          while((count = inputStream.read(data,0, 1024)) != -1) { 
            outStream.write(data, 0, count); 
          } 
          String json = new String(outStream.toByteArray(),"UTF-8"); 
          Gson gson = new GsonBuilder().create(); 
          List<Place> placeList = gson.fromJson(json, new TypeToken<List<Place>>() {}.getType()); 
          subscriber.onNext(placeList); 
        } catch (Exception e) { 
          subscriber.onError(e); 
        } 
        subscriber.onCompleted(); 
      } 
    }); 
  } 
} 

@Override 
public void getPlaceAndWeatherData(String place) { 
  mMainView.showProgress(); 
  PlaceRepository repository = new PlaceRepository(); 
  Context context = BaseApplication.getInstance(); 
  Observable placeObservable = repository.getPlaceList(context); 
  Observable weatherObservable = ServiceManager.getInstance().getApiService().getWeatherInfo(place, Constants.BAIDU_AK); 
  Observable.merge(placeObservable, weatherObservable) 
      .subscribeOn(Schedulers.io()) 
      .observeOn(AndroidSchedulers.mainThread()) 
      .subscribe(new Subscriber<Object>() { 
        @Override 
        public void onCompleted() { 
          mMainView.hideProgress(); 
        } 
 
        @Override 
        public void onError(Throwable e) { 
          mLogger.error(e.getMessage(), e); 
          mMainView.hideProgress(); 
        } 
 
        @Override 
        public void onNext(Object obj) { 
          if (obj instanceof List) { 
            mMainView.setupPlaceData((List<Place>) obj); 
          } else if (obj instanceof WeatherResponse) { 
            mMainView.setupWeatherData((WeatherResponse) obj); 
          } 
        } 
      }); 
}