我的代碼java。我從 Intent 中獲取資料作為陣列。我正在使用 arraylist、listview 和自定義配接器。我可以使用串列視圖顯示傳入的資料。我希望我點擊的專案被洗掉。customadapter 中我的洗掉按鈕“deleteshop”的名稱。我怎樣才能做到這一點 ？
我的代碼；
final ListView list = findViewById(R.id.list);
final ArrayList<SubjectData> arrayList = new ArrayList<SubjectData>();
final String[] cartList = getIntent().getStringArrayExtra("saleData");
arrayList.add(new SubjectData("", ""));
final int cartListLength = cartList.length;
int counter = 0;
String lastItem = "";
for (String e : cartList) {
counter = 1;
if (e == "" || e == null) {
lastItem = cartList[counter-3];
break;
}
String productPhoto = "";
switch (e) {
case "1 PC GREEN COLA x 10.00 TL":
productPhoto = "cc";
break;
default:
productPhoto = "";
break; }
arrayList.add(new SubjectData(e, productPhoto));;
}
arrayList.remove(arrayList.size()-1);
arrayList.remove(arrayList.size()-1);
arrayList.add(new SubjectData("*** GRAND TOTAL TL:" lastItem " ***", "arrowgreen"));
arrayList.add(new SubjectData("", ""));
arrayList.add(new SubjectData("", ""));
final CustomAdapter customAdapter = new CustomAdapter(this, arrayList);
list.setAdapter(customAdapter);
SubjectData 模型類：
String SubjectName;
String Image;
public SubjectData(String subjectName, String image) {
this.SubjectName = subjectName;
this.Image = image;
}
自定義配接器；
class CustomAdapter implements ListAdapter {
ArrayList<SubjectData> arrayList;
Context context;
public CustomAdapter(Context context, ArrayList<SubjectData> arrayList) {
this.arrayList=arrayList;
this.context=context;
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return true;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final SubjectData subjectData=arrayList.get(position);
if(convertView==null){
LayoutInflater layoutInflater = LayoutInflater.from(context);
convertView=layoutInflater.inflate(R.layout.list_row, null);
TextView tittle=convertView.findViewById(R.id.title);
ImageView imag=convertView.findViewById(R.id.list_image);
ImageView
deleteshop=convertView.findViewById(R.id.deleteshop);
deleteshop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(context, "Deneme",
Toast.LENGTH_SHORT).show();
}
});
tittle.setText(subjectData.SubjectName);
Resources resources = context.getResources();
final int resourceId = resources.getIdentifier(subjectData.Image, "drawable",
context.getPackageName());
imag.setImageResource(resourceId);
}
return convertView;
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return arrayList.size();
}
@Override
public boolean isEmpty() {
return false;
}
串列視圖設計；
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5dip">
<LinearLayout
android:id="@ id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip"
android:padding="3dip">
<ImageView
android:id="@ id/list_image"
android:layout_width="50dip"
android:layout_height="50dip" />
</LinearLayout>
<TextView
android:id="@ id/title"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_alignTop="@ id/thumbnail"
android:layout_toRightOf="@ id/thumbnail"
android:gravity="center"
android:textColor="#040404"
android:textSize="15dip"
android:textStyle="bold"
android:typeface="sans" />
<ImageView
android:layout_gravity="center"
android:id="@ id/deleteshop"
android:src="@drawable/negative"
android:layout_width="25dp"
android:layout_height="25dp" ></ImageView>
</LinearLayout>
uj5u.com熱心網友回復：
如果你想從你的串列視圖中洗掉點擊的專案，那么你可以使用這個代碼。我測驗了它的洗掉，在洗掉它的更新串列后也可以順利洗掉。
CustomAdapter customAdapter = new CustomAdapter(this,R.layout.list_row, arrayList);
list.setAdapter(customAdapter);
// after setting adapter put this code
// and update your ui again using set adapter
Log.e("Custom","" arrayList.size());
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
arrayList.remove(i);
list.setAdapter(customAdapter);
}
});
這不是最好的解決方案，而是替代方案，假設如果您想在點擊deletebutton第一個創建一個界面時更新您的配接器，這里是示例
public interface MyInterface{
public void deleteItem(int pos);
}
現在在您的主要活動中，像這樣使用MainActivity extends AppCompatActivity implements MyInterface并放置您的介面方法public void deleteItem(int pos){ arrayList.remove(pos); list.setAdapter(customAdapter); }
之后，從您的配接器呼叫此方法，如下所示
deleteshop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(context, "Delete",
Toast.LENGTH_SHORT).show();
//Actually change your list of items here
if (context instanceof SampleList) {
((MainActivity)context).deleteItem(position);
}
}
});
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/393287.html
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