android - 带有自定义 ArrayAdapter 的 ArrayList

Question

所以我正在尝试按照教程 here但是他们并没有像这里那样使用数组来存储数据:

Weather weather_data[] = new Weather[]
    {
        new Weather(R.drawable.weather_cloudy, "Cloudy"),
        new Weather(R.drawable.weather_showers, "Showers"),
        new Weather(R.drawable.weather_snow, "Snow"),
        new Weather(R.drawable.weather_storm, "Storm"),
        new Weather(R.drawable.weather_sunny, "Sunny")
    };

我想使用像这样的数组列表

ArrayList<Weather> weather_data = new ArrayList<Weather>();

然后存储为

weather_data.add(new new Weather(R.drawable.weather_cloudy, "Cloudy"));

但是我该如何去改变

public class WeatherAdapter extends ArrayAdapter<Weather>{

Context context;
int layoutResourceId;   
Weather data[] = null;

public WeatherAdapter(Context context, int layoutResourceId, Weather[] data) {
    super(context, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = context;
    this.data = data;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    WeatherHolder holder = null;

    if(row == null)
    {
        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new WeatherHolder();
        holder.imgIcon = (ImageView)row.findViewById(R.id.imgIcon);
        holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);

        row.setTag(holder);
    }
    else
    {
        holder = (WeatherHolder)row.getTag();
    }

    Weather weather = data[position];
    holder.txtTitle.setText(weather.title);
    holder.imgIcon.setImageResource(weather.icon);

    return row;
}

static class WeatherHolder
{
    ImageView imgIcon;
    TextView txtTitle;
}
}

使用 arraylist 而不仅仅是数组。

提前谢谢你，

泰勒

编辑1:我试过改变

ArrayList<AllList> data = null;
public WeatherAdapter(Context context, int layoutResourceId, ArrayList<Weather> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}

和

Weather weather = data.get(position);

然后当我尝试像这样在 logcat 中查看它时:

Log.d("天气数据",weather_data.toString());

显示

02-13 21:06:50.542: D/allList_data(6410): [com.skateconnect.AllList@4220ecc0]

Answer 1

对于初学者来说，在您的构造函数中只需将其更改为使用来自

的 ArrayList

public WeatherAdapter(Context context, int layoutResourceId, Weather[] data)

到

public WeatherAdapter(Context context, int layoutResourceId, ArrayList<Weather> data)

然后很明显你会实例化你的列表来改变

 Weather data[] = null;

到

ArrayList<Weather> data = null;