Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>First of all, if you want to change the quantity value, you should have a variable representing quantity which you can change. You have included quantity value in the description text, which is bad design. What you should do is have a quantity variable <code>int</code> in the <code>RowItem</code> class as shown. You <code>desc</code> should just return a string from the quantity value as shown:</p> <pre><code>public class RowItem { private int imageId; private String title; private int quantity = 0; public RowItem(int imageId, String title, int quantity) { this.imageId = imageId; this.title = title; this.quantity = quantity; } public int getImageId() { return imageId; } public void setImageId(int imageId) { this.imageId = imageId; } public String getDesc() { return "Select " + quantity + " Item"; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public int getQuantity() { return quantity; } public void setQuantity(int quantity) { this.quantity = quantity; } @Override public String toString() { return title + "\n" + quantity; } } </code></pre> <p>In your activity, instead of storing descriptions, store quantities:</p> <pre><code>public static final int[] quantities = new int[]{ 0 }; </code></pre> <p>In <code>onCreate</code> initialize the rowItems as follows</p> <pre><code>rowItems = new ArrayList&lt;RowItem&gt;(); for (int i = 0; i &lt; titles.length; i++) { RowItem item = new RowItem(images[i], titles[i], quantities[0]); rowItems.add(item); } </code></pre> <p>Finally, in your <code>OnClickListener</code>, get the quantity value, update it and set the new description.</p> <pre><code>final ViewHolder viewHolderFinal = holder; final RowItem finalRowItem = rowItem; holder.add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int quantity = finalRowItem.getQuantity(); // get the quantity for this row item finalRowItem.setQuantity(quantity + 1); // update it by adding 1 viewHolderFinal.txtDesc.setText(finalRowItem.getDesc()); // set the new description (that uses the updated qunatity) } }); holder.sub.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int quantity = finalRowItem.getQuantity(); // get the quantity for this row item finalRowItem.setQuantity(quantity - 1); // update it by subtracting 1 viewHolderFinal.txtDesc.setText(finalRowItem.getDesc()); // set the new description (that uses the updated qunatity) } }); </code></pre> <p>*<em>Note: *</em> I have compiled and run this code. So if you do everything as I mentioned it will work.</p>
    singulars
    1. This table or related slice is empty.
    1. POHow to add/remove quantity in a list view
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USAmulya Khare
    1. USAmulya Khare
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to add/remove quantity in a list view
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COit didn't work for me error occur "The method parseInt(String) in the type Integer is not applicable for the arguments (CharSequence)"
      singulars
      1. PO
      1. USIllusionist
    2. COyou need to add `toString()` updating my asnswer..
      singulars
      1. PO
      1. USAmulya Khare
    3. COwhen clicking the add button it gives the NullpointerException in logcat at int quantity = Integer.parseInt(viewHolderFinal.txtDesc.getText());
      singulars
      1. PO
      1. USIllusionist
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload