Question

我有一个带有自定义布局的Listview（TextView，Checkbox和imageView），自定义ListView设置为扩展BaseaAapter的适配器。

getView（）方法发布在下面。

我想要做的是，当触摸imageView时，应删除ListView中的该项并the adapter should be notified about the change。在我使用的mainActivity中＆＃34; OnItemClickListener＆＃34;但我不知道如何引用扩展getView()

类中Baseadapter方法中存在的imageView

如何从mainActivity引用getView()方法并基于clickAction删除项目并通知listView的adapeter？

换句话说，如果我在listView中有5个项目，如果点击项目编号3的imageView，则应删除整个项目3，并通过调用＆＃34; notifyDatasetChanged（＆＃34; notifyDatasetChanged）通知适配器（）＆＃34;

OnItemClickListener ：

private OnItemClickListener listViewitemListener = new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        // TODO Auto-generated method stub
    }
};

getView ：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    if (convertView == null) {
        LayoutInflater layoutinflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = layoutinflater.inflate(R.layout.list_items_layout, null);
    }

    TextView tv = (TextView) convertView.findViewById(R.id.tvlist_topic);
    CheckBox cb = (CheckBox) convertView.findViewById(R.id.cbList_hook);
    ImageView iv = (ImageView) convertView.findViewById(R.id.ivList_delete);

    tv.setText(this.arrayList.get(position));
    return convertView;
}

Answer 1

我不确定我理解你的问题，但如果我这样做了，你可以这样解决：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    if (convertView == null) {
        LayoutInflater layoutinflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = layoutinflater.inflate(R.layout.list_items_layout, null);
    }

    TextView tv = (TextView) convertView.findViewById(R.id.tvlist_topic);
    CheckBox cb = (CheckBox) convertView.findViewById(R.id.cbList_hook);
    ImageView iv = (ImageView) convertView.findViewById(R.id.ivList_delete);

    tv.setText(this.arrayList.get(position));

    iv.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            v.setVisibility(View.INVISIBLE); //or View.GONE
        }
    }
    return convertView;
}

编辑：如果要删除整个列表项，请改用：

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    if (convertView == null) {
        LayoutInflater layoutinflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        convertView = layoutinflater.inflate(R.layout.list_items_layout, null);
    }

    TextView tv = (TextView) convertView.findViewById(R.id.tvlist_topic);
    CheckBox cb = (CheckBox) convertView.findViewById(R.id.cbList_hook);
    ImageView iv = (ImageView) convertView.findViewById(R.id.ivList_delete);

    tv.setText(this.arrayList.get(position));

    iv.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            arrayList.remove(position);
            notifyDatasetChanged();
        }
    }
    return convertView;
}

如何引用listView中的项目

1 个答案: