数量和价格不增加

-1

我创建了一个Listview，我想要增加和减少数量和价格点击+。问题是，当我点击+和 - 它不增加或减少。可以任何人给我正确的代码plz.Thanks提前你的帮助。这里是我的代码 -数量和价格不增加

MainActivity.java

public class MainActivity extends Activity implements SearchView.OnQueryTextListener { 
    Button show; 
    ListView list_item; 
    ArrayList<Items> itemsArrayList; 

    SearchView searchview; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     list_item = (ListView) findViewById(R.id.listdetails); 

     searchview = (SearchView) findViewById(R.id.searchView); 
     show = (Button) findViewById(R.id.btnview); 
     itemsArrayList = new ArrayList<>(); 
     itemsArrayList.add(new Items(1, "Book", 20, 0, 0)); 
     itemsArrayList.add(new Items(2, "Pen", 25, 0, 0)); 
     itemsArrayList.add(new Items(3, "Scale", 10, 0, 0)); 
     itemsArrayList.add(new Items(4, "Eraser", 5, 0, 0)); 

     show.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Intent intent = new Intent(MainActivity.this, Trial.class); 
       intent.putExtra("data", itemsArrayList); 
       startActivity(intent); 
      } 
     }); 

     Custom c = new Custom(this,itemsArrayList); 
     list_item.setAdapter(c); 
     list_item.setTextFilterEnabled(true); 
     setupSearchView(); 
    } 

    public void setupSearchView() { 
     searchview.setOnQueryTextListener(this); 
     searchview.setQueryHint("Search Here"); 
    } 

    @Override 
    public boolean onQueryTextSubmit(String s) { 
     return false; 
    } 

    @Override 
    public boolean onQueryTextChange(String s) { 
     if (TextUtils.isEmpty(s)) { 
      list_item.clearTextFilter(); 
     } else { 
      list_item.setFilterText(s); 
     } 
     return true; 
    } 
}

Custom.java

public class Custom extends BaseAdapter implements Filterable{ 
    Activity a; 
    ArrayList<Items> itemsArrayList; 
    ArrayList<Items> filtered; 

    public Custom(Activity a, ArrayList<Items> itemsArrayList) { 
     this.a = a; 
     this.itemsArrayList = itemsArrayList; 
    } 

    @Override 
    public int getCount() { 
     return itemsArrayList.size(); 
    } 

    @Override 
    public Object getItem(int i) { 
     return itemsArrayList.get(i); 
    } 

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

    @Override 
    public Filter getFilter() { 
     return new Filter() { 
      @Override 
      protected FilterResults performFiltering(CharSequence charSequence) { 
       FilterResults results = new FilterResults(); 
       ArrayList<Items> data = new ArrayList<Items>(); 
       if (filtered == null) 
        filtered = itemsArrayList; 
       if (filtered != null && filtered.size() > 0) { 
        for (final Items g : filtered) { 
         if (g.getItemname().toLowerCase() 
           .contains(charSequence.toString())) 
          data.add(g); 
        } 
        results.values = data; 
       } 
       return results; 
      } 

      @Override 
      protected void publishResults(CharSequence charSequence, FilterResults filterResults) { 
       itemsArrayList = (ArrayList<Items>) filterResults.values; 
       notifyDataSetChanged(); 
      } 
     }; 
    } 

    public void notifyDataSetChanged() { 
     super.notifyDataSetChanged(); 
    } 

    public class Holder{ 
     TextView sr, item, qty, price, pl, min, rate; 
    } 

    @Override 
    public View getView(final int position, final View view, ViewGroup viewGroup) { 
     final Holder holder = new Holder(); 
     LayoutInflater li = a.getLayoutInflater(); 
     final View view1 = li.inflate(R.layout.customlist, viewGroup, false); 
     holder.sr = (TextView) view1.findViewById(R.id.s_no); 
     holder.item = (TextView) view1.findViewById(R.id.i_name); 
     holder.qty = (TextView) view1.findViewById(R.id.qty); 
     holder.price = (TextView) view1.findViewById(R.id.pr); 
     holder.rate = (TextView) view1.findViewById(R.id.frate); 
     holder.pl=(TextView) view1.findViewById(R.id.pl); 
     holder.min=(TextView) view1.findViewById(R.id.min); 
     final Items model = itemsArrayList.get(position); 

     holder.sr.setText(String.valueOf(itemsArrayList.get(position).getSrno())); 
     holder.item.setText(String.valueOf(itemsArrayList.get(position).getItemname())); 
     holder.rate.setText(String.valueOf(itemsArrayList.get(position).getFixedrate())); 
     holder.qty.setText(String.valueOf(itemsArrayList.get(position).getQuantity())); 
     holder.price.setText(String.valueOf(itemsArrayList.get(position).getRate())); 

     holder.pl.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       int temp = Integer.parseInt(String.valueOf(model.getQuantity())) + 1; 
       int price1 = Integer.parseInt(String.valueOf(model.getFixedrate())) * temp; 
       holder.qty.setText(temp + " "); 
       holder.price.setText(price1 + " "); 
       notifyDataSetChanged(); 
      } 
     }); 

     holder.min.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       int temp = Integer.parseInt(String.valueOf(model.getQuantity())) - 1; 
       int price1 = Integer.parseInt(String.valueOf(model.getFixedrate())) * temp; 
       if (temp > 0) { 
        int tempPrice = Integer.parseInt(String.valueOf(model.getFixedrate())) * temp; 
        holder.qty.setText(temp + " "); 
        holder.price.setText(price1 + " "); 
       } else { 
        int tempPrice = Integer.parseInt(String.valueOf(model.getFixedrate())) * 0; 
        holder.qty.setText(temp + " "); 
        holder.price.setText(price1 + " "); 
       } 
       notifyDataSetChanged(); 
      } 
     }); 
     return view1; 
    } 
}

Items.java

public class Items implements Serializable { 
    int srno, fixedrate, quantity, rate; 
    String itemname; 

    public Items(int srno, String itemname, int fixedrate, int quantity, int rate) { 
     this.srno = srno; 
     this.itemname = itemname; 
     this.fixedrate = fixedrate; 
     this.quantity = quantity; 
     this.rate = rate; 
    } 

    public int getSrno() { 
     return srno; 
    } 

    public void setSrno(int srno) { 
     this.srno = srno; 
    } 

    public String getItemname() { 
     return itemname; 
    } 

    public void setItemname(String itemname) { 
     this.itemname = itemname; 
    } 

    public int getFixedrate() { 
     return fixedrate; 
    } 

    public void setFixedrate(int fixedrate) { 
     this.fixedrate = fixedrate; 
    } 

    public int getQuantity() { 
     return quantity; 
    } 

    public void setQuantity(int quantity) { 
     this.quantity = quantity; 
    } 

    public int getRate() { 
     return rate; 
    } 

    public void setRate(int rate) { 
     this.rate = rate; 
    } 
}

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    > 
<SearchView 
    android:layout_width="match_parent" 
    android:layout_marginTop="20dp" 
    android:layout_height="30dp" 
    android:id="@+id/searchView" 
    android:queryHint="Search " 
    > 
</SearchView> 
<LinearLayout 
    android:layout_marginTop="30dp" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/item_name" 
    android:orientation="horizontal" 
    android:layout_toRightOf="@+id/sr_no" 
    > 
    <TextView 
      android:layout_width="100dp" 
      android:layout_height="50dp" 
      android:layout_toRightOf="@+id/srno" 
      android:layout_below="@+id/breakfast" 
      android:text="ITEM NAME" 
      android:id="@+id/itemname" 
      android:gravity="center" 
      android:textStyle="bold" 
      android:textColor="#000" 
      /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="30dp" 
     android:id="@+id/fixrate" 
     android:orientation="horizontal" 
     android:layout_toRightOf="@+id/item_name"> 
     <TextView 
      android:layout_width="50dp" 
      android:layout_height="50dp" 
      android:layout_toRightOf="@+id/srno" 
      android:layout_below="@+id/breakfast" 
      android:text="RATE" 
      android:id="@+id/fixratee" 
      android:gravity="center" 
      android:textStyle="bold" 
      android:textColor="#000" 
      /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="30dp" 
     android:id="@+id/qtity" 
     android:orientation="horizontal" 
     android:layout_toRightOf="@+id/fixrate" 
     > 
     <TextView 
      android:layout_width="40dp" 
      android:layout_height="50dp" 
      android:layout_toRightOf="@+id/itemname" 
      android:layout_below="@+id/lunch" 
      android:text="QTY" 
      android:id="@+id/quantity" 
      android:gravity="center" 
      android:textStyle="bold" 
      android:textColor="#000" 
      /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" 
     android:id="@+id/count" 
     android:layout_marginTop="30dp" 
     android:layout_toRightOf="@+id/qtity" 
     > 
     <TextView 
      android:layout_width="50dp" 
      android:layout_height="50dp" /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/rate" 
     android:orientation="horizontal" 
     android:layout_marginTop="30dp" 
     android:layout_toRightOf="@+id/count" 
     > 
     <TextView 
      android:layout_width="50dp" 
      android:layout_height="50dp" 
      android:layout_toRightOf="@+id/quantity" 
      android:layout_below="@+id/snacks" 
      android:text="PRICE" 
      android:id="@+id/price" 
      android:gravity="center" 
      android:textStyle="bold" 
      android:textColor="#000" 
      /> 
    </LinearLayout> 
    <LinearLayout 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:id="@+id/sr_no" 
     android:orientation="horizontal" 
     android:layout_marginTop="30dp" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true"> 
     <TextView 
      android:layout_width="50dp" 
      android:layout_height="50dp" 
      android:layout_below="@+id/breakfast" 
      android:layout_margin="2dp" 
      android:layout_marginTop="10dp" 
      android:text="SR.NO" 
      android:gravity="center" 
      android:textStyle="bold" 
      android:textColor="#000" 
      android:id="@+id/srno" 
      /> 
    </LinearLayout> 
    <ListView 
     android:layout_width="match_parent" 
     android:layout_height="300dp" 
     android:id="@+id/listdetails" 
     android:scrollbars="vertical" 
     android:layout_below="@+id/item_name" 
     android:layout_alignParentLeft="true" 
     android:layout_alignParentStart="true"> 
    </ListView> 
    <Button 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/btnview" 
     android:text="View" 
     android:layout_below="@+id/listdetails" 
     android:clickable="true"> 
    </Button> 
</RelativeLayout>

customlist.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    <TextView 
     android:layout_width="50dp" 
     android:layout_height="50dp" 
     android:id="@+id/s_no" 
     android:layout_marginTop="5dp" 
     android:gravity="center" 
     android:textColor="#000" 
     android:textStyle="bold" 
     /> 
    <TextView 
     android:layout_width="50dp" 
     android:layout_height="50dp" 
     android:id="@+id/frate" 
     android:gravity="center" 
     android:textColor="#000" 
     android:textStyle="bold" 
     android:layout_marginTop="5dp" 
     android:layout_toRightOf="@+id/i_name"/> 
    <TextView 
     android:layout_width="25dp" 
     android:layout_height="25dp" 
     android:id="@+id/pl" 
     android:layout_marginTop="5dp" 
     android:layout_toRightOf="@+id/qty" 
     android:background="@drawable/plus1" 
     /> 
    <TextView 
     android:layout_width="50dp" 
     android:layout_height="50dp" 
     android:id="@+id/qty" 
     android:layout_toRightOf="@id/frate" 
     android:gravity="center" 
     android:textColor="#000" 
     android:textStyle="bold" 
     android:layout_marginTop="5dp" 
     /> 
    <TextView 
     android:layout_width="25dp" 
     android:layout_height="25dp" 
     android:id="@+id/min" 
     android:layout_marginTop="3dp" 
     android:layout_below="@id/pl" 
     android:layout_toRightOf="@id/qty" 
     android:background="@drawable/minus1" 
     /> 
    <TextView 
     android:layout_width="60dp" 
     android:layout_height="50dp" 
     android:id="@+id/pr" 
     android:gravity="center" 
     android:textColor="#000" 
     android:textStyle="bold" 
     android:layout_marginLeft="10dp" 
     android:layout_alignBottom="@+id/min" 
     android:layout_toRightOf="@+id/pl" 
     android:layout_toEndOf="@+id/pl" /> 
    <TextView 
     android:layout_width="100dp" 
     android:layout_height="50dp" 
     android:gravity="center" 
     android:textColor="#000" 
     android:textStyle="bold" 
     android:id="@+id/i_name" 
     android:layout_alignBaseline="@+id/s_no" 
     android:layout_alignBottom="@+id/s_no" 
     android:layout_toRightOf="@+id/s_no" 
     android:layout_toEndOf="@+id/s_no" /> 
</RelativeLayout>

来源

2017-04-12 riya

使用textwatcher –

我要为递增和递减代码只。也许我holder.pl.setOnclickListener和holder.min.setOnclickListener的代码是有一些问题。请参见Custom.java页面 – riya

用一个整数变量实现，当点击+时递增，当点击时递减 - – Piyush

试试：

holder.pl.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

      model.setQuantity(model.getQuantity() + 1); 
      model.setRate(model.getQuantity() * model.getFixedrate()); 
      holder.qty.setText(String.valueOf(model.getQuantity())); 
      holder.price.setText(String.valueOf(model.getRate())); 
      notifyDataSetChanged(); 
     } 
    }); 



    holder.min.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 

      if (model.getQuantity() > 0) { 
       model.setQuantity(model.getQuantity() - 1); 
       model.setRate(model.getQuantity() * model.getFixedrate()); 
       holder.qty.setText(String.valueOf(model.getQuantity())); 
       holder.price.setText(String.valueOf(model.getRate())); 
       notifyDataSetChanged(); 
      } 
     } 
    });

来源

2017-04-12 11:03:23 FAT

是工作得很好 – riya

很高兴知道那。如果我的解决方案正常工作，则标记为已接受的答案 – FAT

还有一个问题。我发布后会给出这个问题的链接。我不能发布90分钟的新问题。所以稍后再检查一下。 – riya

该模型不更新与新的递增/递减值。

holder.pl.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View view) { 
    model.setQuantity(model.getQuantity() + 1) 
    holder.qty.setText(String.valueOf(model.getQuantity())); 
    holder.price.setText(String.valueOf(model.getQuantity() * 
    model.getFixedrate())); 
    notifyDataSetChanged(); 
    } 
});

来源

2017-04-12 10:32:32 rckrd

终于明白了。

holder.pl.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 

       model.setQuantity(model.getQuantity() + 1); 
       model.setRate(model.getQuantity()*model.getFixedrate()); 
       holder.qty.setText(String.valueOf(model.getQuantity())); 
       holder.price.setText(String.valueOf(model.getRate())); 
       notifyDataSetChanged(); 


      } 
     });

来源

2017-04-12 10:57:10 riya

数量和价格不增加

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