[英]On a card view created dynamically, how can I remove individual cards if a delete button specific to a card is pressed?
[英]How can I attach a delete button (x) to each member of a dynamically created ListView?
我有一個動態創建的列表。 它的片段布局如下:
<ListView
android:id="@+id/colorsList"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
當我向列表視圖添加一行時,我希望在行的末尾出現一個“X”標記,以便當用戶單擊“X”時,該行被刪除。
不確定,如果它相關,但我向列表視圖添加和刪除行的方式如下。
在 listView 中添加一行的邏輯:
@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);
從 ListView 中刪除一行的邏輯。
listFavoriteColors.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
initializeView();
arrayAdapter.remove(((TextView)view).getText().toString());
}
});
非常感謝任何有關如何實現這一點的有用建議。
具有自定義布局的用戶自定義適配器將刪除按鈕附加到列表視圖中的每個項目
試試這個代碼:
自定義適配器
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 定義了 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中定義ListView這樣,
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);
界面
public interface ListInterFace {
void removeItem(int position);
}
嘗試此鏈接以從按鈕單擊的列表視圖中刪除項目單擊從列表視圖中刪除項目單擊按鈕
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