/** 查询选中省份内所有的市,优先从数据库中查询,如果没有再到服务器上查询 */ private void queryCites() { cityList = terrificWeatherDB.loadCities(selectedProvince.getId()); if (cityList.size() > 0) { dataList.clear(); for (City city : cityList) { dataList.add(city.getCityName()); } adapter.notifyDataSetChanged(); listView.setSelection(0); titleText.setText(selectedProvince.getProvinceName()); currentLevel = LEVEN_CITY; } else { queryFromServer(selectedProvince.getProvinceCode(), "city"); } }
/** 查询选中市内所有的县,优先从数据库中查询,如果没有查询到再去服务器上查询 */ private void queryCounties() { countyList = terrificWeatherDB.loadCounties(selectedCity.getId()); if (countyList.size() > 0) { dataList.clear(); for (County county : countyList) { dataList.add(county.getCountyName()); } adapter.notifyDataSetChanged(); listView.setSelection(0); titleText.setText(selectedCity.getCityName()); currentLevel = LEVEL_COUNTY; } else { queryFromServer(selectedCity.getCityCode(), "county"); } }
/** 查询全国所有的省,优先从数据库查询,如果没有查询到再去服务器上查询 */ private void queryProvinces() { provinceList = terrificWeatherDB.loadProvinces(); if (provinceList.size() > 0) { dataList.clear(); for (Province province : provinceList) { dataList.add(province.getProvinceName()); } adapter.notifyDataSetChanged(); listView.setSelection(0); titleText.setText("中国"); currentLevel = LEVEL_PROVINCE; } else { queryFromServer(null, "province"); } }
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); isFromWeatherActivity = getIntent().getBooleanExtra("from_weather_activity", false); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); if (prefs.getBoolean("city_selected", false) && !isFromWeatherActivity) { Intent intent = new Intent(this, WeatherActivity.class); startActivity(intent); finish(); return; } setContentView(R.layout.choose_area); listView = (ListView) findViewById(R.id.list_view); titleText = (TextView) findViewById(R.id.title_text); adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, dataList); listView.setAdapter(adapter); terrificWeatherDB = TerrificWeatherDB.getInstance(this); 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); queryCites(); } else if (currentLevel == LEVEN_CITY) { selectedCity = cityList.get(position); queryCounties(); } else if (currentLevel == LEVEL_COUNTY) { LogUtil.d("X_Cat", "ChooseAreaActivity-100 onCreate()"); String countyCode = countyList.get(position).getCountyCode(); Intent intent = new Intent(ChooseAreaActivity.this, WeatherActivity.class); intent.putExtra("county_code", countyCode); startActivity(intent); finish(); } } }); queryProvinces(); // 加载省级数据 }