android - 从 ListView 中删除项目 onlongclick

Question

我想在长按列表中的某个项目时给出一个选项删除，如果按下则删除该项目。

//onCreate()
alreadyAddedFood = (ListView) findViewById(R.id.alreadyAddedList);
registerForContextMenu(alreadyAddedFood); 

//END of onCreate()

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
{
    super.onCreateContextMenu(menu, v, menuInfo);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu_general, menu);
    menu.setHeaderTitle("Select The Action");
}
@Override
public boolean onContextItemSelected(MenuItem item){
    if(item.getItemId()==R.id.delete){
          //How to delete?
        Toast.makeText(getApplicationContext(),"delete"+item,Toast.LENGTH_LONG).show();

    }else{
        return false;
    }
    return true;
}

更新

我也有这个类，我实现了 onlongClickListener，它工作正常，但没有像下面的照片那样为用户提供按删除的选项

 public void alreadyAdded(String searchedMessage) {

        itemsAdded.add(searchedMessage);

        final ArrayAdapter<String>addedAdapter= new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,itemsAdded);
        alreadyAddedFood.setAdapter(addedAdapter);

     alreadyAddedFood.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
//            @Override
//            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
//                itemsAdded.remove(position);
//                addedAdapter.notifyDataSetChanged(); 
//                Toast.makeText(AddFood.this, "Item Deleted", Toast.LENGTH_LONG).show();
//                return true;
//            }
//        });
    }

Answer 1

将此添加到您的 onContextItemSelected 中:

AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); // init the info to get the position from
items.remove(info.position); // remove the item from the list 
adapter.notifyDataSetChanged(); //updating the adapter