Question

嘿伙计我有这个适配器类，我希望它将照片传递给gridview，我将照片的上下文和网址传递给构造函数，但似乎它们是null＆lt;任何人都可以告诉我这是什么问题？

public class MovieAdapter extends BaseAdapter {

    private final String LOG_TAG = MovieAdapter.class.getSimpleName();
    public  final String urlBase = "http://image.tmdb.org/t/p/w185";
    private final Context context;
    private  String[] urls;

    public MovieAdapter(Context context, String[] urls) {
        this.context = context;
        this.urls = urls;
    }


    @Override
    public int getCount() {
        return urls.length;
    }

    @Override
    public Object getItem(int position) {
        return urls[position];
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = new ImageView(context);
        }
        ImageView imageView = (ImageView) convertView;
        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        String url = (String) getItem(position);
        Log.e(LOG_TAG , "URL " + url);
        Picasso.with(context).load(url).into(imageView);
        return convertView;
    }
}

Answer 1

yourAdapterObj = new MovieAdapter（＆＃34;你的活动名称＆＃34;，＆＃34;你的网址arraylist＆＃34;）; yourgridview.setAdapter（yourAdapterObj）; 传递适当的activityClass名称ActivityClass.this

android中适配器类的构造函数中的null上下文

1 个答案: