我有一个动态创建的列表。它的片段布局如下:
<ListView
android:id="@+id/colorsList"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
当我向列表视图添加一行时,我希望在行的末尾出现一个“ X”标记,以便当用户单击“ X”时,该行将被删除。
不确定,如果它相关,但是我向列表视图添加和删除行的方式如下。
向listView添加一行的逻辑:
@BindView(R.id.understood_languages_list)
View mColorsList;
*********
*********
ListView listFavoriteColors;
listFavoriteColors = (ListView) mColorsList;
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, getColorsList());
listFavoriteColors.setAdapter(arrayAdapter);
用于从ListView中删除行的逻辑。
listFavoriteColors.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
initializeView();
arrayAdapter.remove(((TextView)view).getText().toString());
}
});
非常感谢您提供有关如何实现此目标的有用建议。
尝试此代码:
CustomAdapter
public class ListAdapter extends ArrayAdapter<String> {
private int resourceLayout;
private Context mContext;
ListInterFace interface;
public ListAdapter(Context context, int resource, List<String>
items,ListInterFace interface) {
super(context, resource, items);
this.resourceLayout = resource;
this.mContext = context;
this.interface=interface;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi;
vi = LayoutInflater.from(mContext);
v = vi.inflate(resourceLayout, null);
}
String value= getItem(position);
if (value!= null) {
TextView tt1 = (TextView) v.findViewById(R.id.dummytext);
Button cancel_click=v.findViewById(R.id.cancel_click);
if (tt1 != null) {
tt1.setText(value);
}
//remove item on button click
cancel_click.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
interface.removeItem(position);
}
})
}
return v;
}
}R.layout.itemlistrow定义ListView的行。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" tools:context=".MainActivity"> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/dummytext" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Dummy" android:textColor="@android:color/black" android:textSize="18sp" android:padding="5dp"/> <ImageView android:id="@+id/cancel_click" android:layout_width="20dp" android:layout_height="20dp" android:src="@mipmap/cancel" android:layout_alignParentRight="true" android:layout_margin="5dp"/> </RelativeLayout> </LinearLayout>
在MainActivity中像这样定义ListView,
ListView yourListView = (ListView) findViewById(R.id.itemListView); // get data from the table by the ListAdapter ListAdapter customAdapter = new ListAdapter(this, R.layout.itemlistrow, myList, new ListInterFace () { @Override public void removeItem( int position) { myList.remove(position); customAdapter .notifyDataSetChanged(); }); yourListView .setAdapter(customAdapter);
InterFace
public interface ListInterFace {
void removeItem(int position);
}
尝试单击此链接可在单击按钮时从列表视图中删除项目Remove Item From List View On Button Click