Setzen Sie ein customlistview innerhalb Fragment der Registerkarte

Question

Also im Grunde muss ich wissen, was der Titel sagen, habe ich meinen Code:

die ListAdapter.java

public class ListAdapter extends BaseAdapter { 

public ArrayList<Integer> quantità = new ArrayList<Integer>(); 
private String[] listViewItems, prezzi; 
TypedArray images; 

private Context context; 
CustomButtonListener customButtonListener; 

public ListAdapter(Context context, String[] listViewItems, TypedArray images, String[] prezzi) { 
    this.context = context; 
    this.listViewItems = listViewItems; 
    this.images = images; 
    this.prezzi=prezzi; 

    for(int i =0; i< listViewItems.length; i++) 
    { 
     quantità.add(0); 
     //quantity[i]=0; 
    } 
} 

public void setCustomButtonListener(CustomButtonListener customButtonListner) 
{ 
    this.customButtonListener = customButtonListner; 
} 

@Override 
public int getCount() { 
    return listViewItems.length; 
} 

@Override 
public String getItem(int position) { 
    return listViewItems[position]; 
} 

@Override 
public long getItemId(int position) { 
    return 0; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 
    View row; 
    final ListViewHolder listViewHolder; 
    if(convertView == null) 
    { 
     LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     row = layoutInflater.inflate(R.layout.sis,parent,false); 
     listViewHolder = new ListViewHolder(); 
     listViewHolder.tvFruitName = (TextView) row.findViewById(R.id.tvFruitName); 
     listViewHolder.ivFruit= (ImageView) row.findViewById(R.id.ivFruit); 
     listViewHolder.tvPrices = (TextView) row.findViewById(R.id.tvFruitPrice); 
     listViewHolder.btnPlus = (ImageButton) row.findViewById(R.id.ib_addnew); 
     listViewHolder.edTextQuantity = (EditText) row.findViewById(R.id.editTextQuantity); 
     listViewHolder.btnMinus = (ImageButton) row.findViewById(R.id.ib_remove); 
     row.setTag(listViewHolder); 
    } 
    else 
    { 
     row=convertView; 
     listViewHolder= (ListViewHolder) row.getTag(); 
    } 

    listViewHolder.ivFruit.setImageResource(images.getResourceId(position, -1)); 
    listViewHolder.tvPrices.setText(prezzi[position]); 

    try{ 

     listViewHolder.edTextQuantity.setText(quantità.get(position) + ""); 


    }catch(Exception e){ 
     e.printStackTrace(); 
    } 

    listViewHolder.btnPlus.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (customButtonListener != null) { 
       customButtonListener.onButtonClickListener(position, listViewHolder.edTextQuantity, + 1); 
       quantità.set(position,quantità.get(position) + 1); 
      } 

     } 
    }); 

    listViewHolder.btnMinus.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (customButtonListener != null) { 
       customButtonListener.onButtonClickListener(position,listViewHolder.edTextQuantity,-1); 
       if(quantità.get(position)>0) 
        quantità.set(position, quantità.get(position) - 1); 
      } 
     } 
    }); 
    listViewHolder.tvFruitName.setText(listViewItems[position]); 
    return row; 
} 

} 

dann die string.xml wo ich mein Array

<resources> 
<string name="app_name">Ristorante</string> 

<string-array name="fruitName"> 
    <item>Spaghetti allo scoglio</item> 
    <item>Cherry</item> 
    <item>Coconut</item> 
    <item>Grape Fruit</item> 
    <item>Lemon</item> 
    <item>Strawberry</item> 
    <item>Watermelon</item> 
</string-array> 

<string-array name="fruitImages"> 
    <item>@mipmap/spaghettiscoglio</item> 
    <item>@mipmap/caffeshakerato</item> 
    <item>@mipmap/barbabietoleagrodolci</item> 
    <item>@mipmap/barbadifrate</item> 
    <item>@mipmap/bellinicocktail</item> 
    <item>@mipmap/pennefume</item> 
    <item>@mipmap/alettedipollo</item> 
</string-array> 

<string-array name="Price"> 
    <item>10 $</item> 
    <item>12 $</item> 
    <item>15 $</item> 
    <item>24 $</item> 
    <item>3 $</item> 
    <item>50 $</item> 
    <item>5 $</item> 
</string-array> 

und schließlich die Tab1.java wo gibt es mir Fehler auf: - listAdapter = new ListAdapter (this, arrItems, Bilder, Prezzi); - listAdapter.setCustomButtonListener (this);

public class Tab1 extends Fragment { 

ListView listView; 
ListAdapter listAdapter; 
String[] arrItems, prezzi; 
TypedArray images; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View v =inflater.inflate(R.layout.tab1,container,false); 

    arrItems = getResources().getStringArray(R.array.fruitName); 
    images = getResources().obtainTypedArray(R.array.fruitImages); 
    prezzi = getResources().getStringArray(R.array.Price); 
    listView = (ListView) v.findViewById(R.id.customListView); 
    listAdapter = new ListAdapter(this,arrItems,images,prezzi); 
    listView.setAdapter(listAdapter); 
    listView.setScrollingCacheEnabled(false); 
    listAdapter.setCustomButtonListener(this); 

    return v; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
} 

@Override 
public void onButtonClickListener(int position,EditText editText, int value) { 
    /* 
    View view = listView.getChildAt(position);*/ 
    int quantity = Integer.parseInt(editText.getText().toString()); 
    quantity = quantity + 1 * value; 
    if(quantity<0) 
     quantity=0; 
    editText.setText(quantity + ""); 
} 

}

Answer 1

listAdapter.setCustomButtonListener(this); - this sollte CustomButtonListener Objekt zeigen, aber es funktioniert nicht. Wenn CustomButtonListener ist Schnittstelle dann

public class Tab1 extends Fragment implements CustomButtonListener 

hier:

listAdapter = new ListAdapter(this,arrItems,images,prezzi); 

sollte

listAdapter = new ListAdapter(getActivity(),arrItems,images,prezzi); 

sein, weil Sie Context