如何在android的基本适配器中删除自定义listview中的行
在行自定义列表视图中显示itemimage、itemname、rate、qty、price和delete按钮。。如果单击“删除”按钮,则表示希望删除listview中的整行 我试试这个代码如何在android的基本适配器中删除自定义listview中的行,android,arraylist,android-listview,custom-lists,Android,Arraylist,Android Listview,Custom Lists,在行自定义列表视图中显示itemimage、itemname、rate、qty、price和delete按钮。。如果单击“删除”按钮,则表示希望删除listview中的整行 我试试这个代码 public class CustomAdapter extends BaseAdapter { public static Double x = 0.0; public static Double z; ArrayList<Integer> selectprice = new Arra
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;
}
}
公共类CustomAdapter扩展了BaseAdapter{
公共静态双x=0.0;
公共静态双z;
ArrayList selectprice=新建ArrayList();
公共静态ArrayList arr1=新ArrayList();
公共静态ArrayList itemprice=新ArrayList();
公共静态ArrayList itemimage=新ArrayList();
ArrayList总计=新的ArrayList();
公共语境;
私人充气机;
HashMap=newHashMap();
公共CustomAdapter(上下文上下文,ArrayList arr,
ArrayList价格,ArrayList图像){
上下文=上下文;
充气器=充气器。从(上下文);
arr1=arr;
项目价格=价格;
itemimage=图像;
系统输出打印项次(项目价格);
System.out.println(“arr:+arr.size());
对于(int i=0;i
这是my 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,然后将其显示到自定义列表视图中。若我按delete按钮,意味着它将删除listview中的特定行。请帮助我您需要调用
Adapter.notifyDataSetChanged()
在对数组列表中的数据源进行更改后,请尝试以下操作:
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”意味着与视图关联的数据已被更改,因此视图必须刷新自身以使其与数据保持更新。适配器。删除(itemimage);
.
.
.
adapter.notifyDataSetChanged()
其中“adapter”是将数据存储到listview中的适配器名称,如(listview.setadapter(adapter)),您知道的“itemimage”是什么