Java 如何使用列表在ListView中设置数据<；对象>；在android中

我在ListView中添加了一些虚拟数据，如下所示

List<String> sevenDay;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container, false);
        String[] forecastList = {
                "Today",
                "Tomorrow",
                "The day after Tomorrow"
        };
        sevenDay = new ArrayList<>(Arrays.asList(forecastList));

        ArrayAdapter<String> forecasteAdapter;
        forecasteAdapter = new ArrayAdapter<String>(
                getActivity(),
                R.layout.list_item_forecast,
                R.id.list_item_forecast_textView,
                sevenDay);

        ListView forecasteListView = (ListView) rootView.findViewById(R.id.listView_forecast);
        forecasteListView.setAdapter(forecasteAdapter);
        new FetchWeatherTask().execute("SomeThing",null,null);
        return rootView ;
    }

---

这里我需要从ForecastWeather的java.util.List列表中获取值，但不知道如何将该对象转换为字符串？

您可以在

ForecastWeather

中创建一个函数，该函数将

列表

转换为

字符串的
列表

public class ForecastWeather {

private String cod;
private String message;
private Integer cnt;
private City city;
private java.util.List<SomeObject> list = new ArrayList<SomeObject>();

public List<String> getAsStringList(){
    List<String> l=new ArrayList<>();
    for(SomeObject someObject:list){
        //You can override the toString() function of SomeObject class
        l.add(someObject.toString());
    }
    return l;
}
}

}

然后在
onPostExecute

@Override
protected void onPostExecute(ForecastWeather forecastWeather) {
   super.onPostExecute(forecastWeather);
   sevenDay = forecastWeather.getAsStringList(); // getting a string list
}

在天气预报课上，宣布：

    @Override
public String toString() {
    // TODO Auto-generated method stub
    return city;

}

只是错过了，谢谢你的快速和宝贵的帮助。
public class ForecastWeather {

private String cod;
private String message;
private Integer cnt;
private City city;
private java.util.List<SomeObject> list = new ArrayList<SomeObject>();

public List<String> getAsStringList(){
    List<String> l=new ArrayList<>();
    for(SomeObject someObject:list){
        //You can override the toString() function of SomeObject class
        l.add(someObject.toString());
    }
    return l;
}
}

public class SomeObject {
//class definition etc

//override this method
@Override
public String toString() {
    // put your logic to get a string for the given object. this depends upon you implementation
    return "dummy";
}

@Override
protected void onPostExecute(ForecastWeather forecastWeather) {
   super.onPostExecute(forecastWeather);
   sevenDay = forecastWeather.getAsStringList(); // getting a string list
}

    @Override
public String toString() {
    // TODO Auto-generated method stub
    return city;

}