@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.fragment_choose_main);
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);
coolweatherdb = CoolWeatherDB.getInstance(this);
// listview的点击事件
listview.setOnItemClickListener(
new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View view, int index, long arg3) {
if (currentLevel == LEVEL_PROVINCE) {
selectedprovince = provinceList.get(index);
querycity();
} else if (currentLevel == LEVEL_CITY) {
selectedcity = cityList.get(index);
querycounty();
}
}
});
queryprovince();
}
/*
* 查询省内所有市，优先在数据库中查询，如果没有查询到再到服务器上去查询
*/
private void querycity() {
cityList = coolweatherdb.loadCities(selectedprovince.getId());
if (cityList.size() > 0) {
dataList.clear();
for (City province : cityList) {
dataList.add(province.getCityname());
}
adapter.notifyDataSetChanged();
listview.setSelection(0);
titleText.setText(selectedprovince.getProvincename());
currentLevel = LEVEL_CITY;
} else {
queryFromServer(selectedprovince.getProvincecode(), "city");
}
}
/*
* 查询全国所有的省，优先在数据库中查询，如果没有查询到再到服务器上去查询
*/
private void queryprovince() {
provinceList = coolweatherdb.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");
}
}