我在行自定义 ListView 中显示了项目图像、项目名称、费率、数量、价格和删除按钮。如果我单击删除按钮意味着我想删除 ListView 中的整行。
我试试这段代码
public class CustomAdapter extends BaseAdapter {
public static Double x = 0.0;
public static Double z;
ArrayList<Integer> selectprice = new ArrayList<Integer>();
public static ArrayList<String> arr1 = new ArrayList<String>();
public static ArrayList<String> itemprice = new ArrayList<String>();
public static ArrayList<Bitmap> itemimage = new ArrayList<Bitmap>();
ArrayList<Integer> total = new ArrayList<Integer>();
public Context Context;
private LayoutInflater inflater;
HashMap<String, String> map = new HashMap<String, String>();
public CustomAdapter(Context context, ArrayList<String> arr,
ArrayList<String> price, ArrayList<Bitmap> image) {
Context = context;
inflater = LayoutInflater.from(context);
arr1 = arr;
itemprice = price;
itemimage = image;
System.out.println(itemprice);
System.out.println("arr: " + arr.size());
for (int i = 0; i < price.size(); i++) {
x = x + Double.parseDouble(price.get(i));
}
}
public int getCount() {
// TODO Auto-generated method stub
return arr1.size();
}
// public void remove(ViewHolder v) {
// arr1.remove(arr1);
// notifyDataSetChanged();
// }
public Object getItem(int position) {
// TODO Auto-generated method stub
return arr1.get(position);
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.selecteditemlistview, null);
holder = new ViewHolder();
holder.textViewSelectedText = (TextView) convertView
.findViewById(R.id.selectedtext);
holder.price = (TextView) convertView
.findViewById(R.id.selectitemprice);
holder.image = (ImageView) convertView
.findViewById(R.id.selectitemimage);
holder.qty = (EditText) convertView.findViewById(R.id.selectqty);
holder.total = (TextView) convertView.findViewById(R.id.price);
holder.delete = (Button) convertView.findViewById(R.id.delete);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final Double price1 = Double.parseDouble(itemprice.get(position));
int qut = Integer.parseInt(holder.qty.getText().toString());
final Double total = (price1 * qut);
System.out.println(total);
holder.textViewSelectedText.setText(arr1.get(position));
holder.price.setText(itemprice.get(position));
holder.image.setImageBitmap(itemimage.get(position));
holder.total.setText(String.valueOf(total));
holder.delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
arr1.remove(position);//here only i tried to remove the row in custom listview
itemprice.remove(position);
itemimage.remove(position);
}
});
holder.qty.setOnFocusChangeListener(new OnFocusChangeListener() {
public void onFocusChange(View v, boolean hasFocus) {
// TODO Auto-generated method stub
if (!hasFocus) {
final EditText Caption = (EditText) v;
Caption.setFocusable(true);
holder.qty.setFocusable(true);
Double q = Double.parseDouble(holder.qty.getText()
.toString());
double result = (price1 * q);
}
}
});
return convertView;
}
class ViewHolder {
Button delete = null;
TextView textViewSelectedText = null;
TextView price = null;
ImageView image = null;
EditText qty = null;
TextView total = null;
}
}
这是我的 selecteditemlistview.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/selectitemimage"
android:layout_width="75dip"
android:layout_height="79dip" android:src="@drawable/stub"
android:scaleType="centerCrop"/>
<TextView
android:id="@+id/selectedtext"
android:textColor="#000000"
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_marginLeft="80dip"
android:layout_weight="1"
android:textSize="15sp" />
<TextView
android:id="@+id/selectitemprice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_marginLeft="250dp"/>
<EditText
android:id="@+id/selectqty"
android:maxLength="3"
android:layout_width="40dp"
android:text="1"
android:layout_height="40dp"
android:singleLine="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="36dp"
android:layout_toRightOf="@+id/selectitemprice"
>
<requestFocus />
</EditText>
<TextView
android:id="@+id/price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="400dp"
android:layout_toRightOf="@+id/editText1"
android:inputType="none"
android:textColor="#000000"
android:editable="false"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="@+id/delete"
android:layout_width="100dp"
android:layout_height="50dp"
android:text="delete"
android:layout_marginLeft="630dp"
/>
</RelativeLayout>
我获取了 itemimage itemname price 的所有数组，然后显示到自定义 ListView 中。如果我按删除按钮意味着它删除 ListView 中的特定行。请帮助我
最佳答案
试试这个，
holder.delete.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
arr1.remove(position);//here only i tried to remove the row in custom listview
itemprice.remove(position);
itemimage.remove(position);
notifyDataSetChanged();
}
});
调用 “notifyDataSetChanged” 意味着与 View 关联的数据已更改，因此 View 必须自行刷新以使其随数据更新。
关于android - 如何在android中的基本适配器中删除自定义 ListView 中的行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10647168/