从列表视图中删除项目并在另一个列表视图活动中添加已删除的项目？

Question

你能给我一个从ListView传递数据到另一个ListView的例子吗？

例如，我的MainActivity.java 有ListView，当我删除上面的项目时。我想要实现的是将其传递并添加到另一个ListView 活动中。

MainActivity.java | OnitemClick

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
        long id) {

    String member_name = rowItems.get(position).getMember_name();
    int product_icons = rowItems.get(position).getProfile_pic_id();
    String status = rowItems.get(position).getStatus();

    // passing data
    Intent i = new Intent(getBaseContext(), CarActivity.class);
    i.putExtra("member_name", member_name);
    i.putExtra("product_icons", product_icons);
    i.putExtra("status", status);

    RowItem item = rowItems.get(position);

    rowItems.remove(item);

    newadapter = new CustomAdapter(this, rowItems);
    mylistview.setAdapter(newadapter);

    newadapter.notifyDataSetChanged();

    Toast.makeText(this.getApplicationContext(),
            "Added to Cart: " + member_name, Toast.LENGTH_SHORT).show();

}

CartActivity.java | onCreate

    Bundle extras = getIntent().getExtras();
    if (extras != null) {
        String member_names = extras.getString("member_name");
        int product_icons = extras.getInt("product_icons");
        String status = extras.getString("status");
    }

    rowItems = new ArrayList<RowItem_cart>();

    RowItem_cart item = new RowItem_cart(member_names, product_icons, status);
    rowItems.add(item);

    mylistview = (ListView) findViewById(R.id.list);

    mylistview.setItemsCanFocus(true);
    //
    final CustomerAdapter_Cart adapter = new CustomerAdapter_Cart(this,
            rowItems);
    mylistview.setAdapter(adapter);

    mylistview.setOnItemClickListener(this);

    mylistview.setScrollingCacheEnabled(false);

    mylistview.invalidateViews();

CustomAdapter_cart

public class CustomerAdapter_Cart extends BaseAdapter {

Context context;
List<RowItem_cart> rowItems;

public CustomerAdapter_Cart(Context context, List<RowItem_cart> rowItems) {
    this.context = context;
    this.rowItems = rowItems;

}

public CustomerAdapter_Cart() {
    // TODO Auto-generated constructor stub
}

@Override
public int getCount() {
    return rowItems.size();
}

@Override
public Object getItem(int position) {
    return rowItems.get(position);
}

@Override
public long getItemId(int position) {
    return rowItems.indexOf(getItem(position));
}

/* private view holder class */
private class ViewHolder {
    ImageView product_icons;
    TextView member_name;
    TextView status;
    Button addtocart;
    EditText txtQuantity;
    TextView lblQty;
}

ViewHolder holder = null;

@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    LayoutInflater mInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.list_item_cart, null);
        holder = new ViewHolder();

        holder.member_name = (TextView) convertView
                .findViewById(R.id.member_name);
        holder.product_icons = (ImageView) convertView
                .findViewById(R.id.product_icons);
        holder.status = (TextView) convertView.findViewById(R.id.status);
        holder.addtocart = (Button) convertView
                .findViewById(R.id.btnaddtocart);

        holder.txtQuantity = (EditText) convertView
                .findViewById(R.id.txtQuantity);

        holder.lblQty = (TextView) convertView.findViewById(R.id.lblQty);

        convertView.setTag(holder);

    } else {

        holder = (ViewHolder) convertView.getTag();

    }
    RowItem_cart row_pos = rowItems.get(position);

    holder.product_icons.setImageResource(row_pos.getProfile_pic_id());
    holder.member_name.setText(row_pos.getMember_name());
    holder.status.setText(row_pos.getStatus());
    holder.addtocart.setText(" add to cart");

    return convertView;
    }

  }

RowItem_cart

public class RowItem_cart {

private String member_name;
private int profile_pic_id;
private String status;

public RowItem_cart(String member_name, int profile_pic_id, String status) {

    this.member_name = member_name;
    this.profile_pic_id = profile_pic_id;
    this.status = status;

}

public String getMember_name() {
    return member_name;
}

public void setMember_name(String member_name) {
    this.member_name = member_name;
}

public int getProfile_pic_id() {
    return profile_pic_id;
}

public void setProfile_pic_id(int profile_pic_id) {
    this.profile_pic_id = profile_pic_id;
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}

  }

Answer 1

在您的MainActivity 中，您可能有一个onItemSelected() 侦听器。在那里，您可以获取从活动项目列表中删除的项目。假设您有一个已删除项目列表的字段，您只需在该列表中调用 add() 并使用您刚刚删除的项目。

没有你的一些实际代码，我们将能够带你走多远;)