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POHow to add/remove quantity in a list view
 

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  1. POHow to add/remove quantity in a list view
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    <p>I want to add quantity when the add button is clicked and subtract quantity when sub button is clicked here i am not showing my setter/getter class(RowItem) and my xml files (main.xml,item_details_view) </p> <p>This is my Adapter class</p> <pre><code>public class ItemListBaseAdapter extends ArrayAdapter&lt;RowItem&gt; { Context context; public ItemListBaseAdapter(Context context, int resourceId, List&lt;RowItem&gt; items) { super(context, resourceId, items); this.context = context; } /*private view holder class*/ private class ViewHolder { ImageView imageView; TextView txtTitle; TextView txtDesc; Button add,sub; } public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; RowItem rowItem = getItem(position); LayoutInflater mInflater = (LayoutInflater) context .getSystemService(Activity.LAYOUT_INFLATER_SERVICE); if (convertView == null) { convertView = mInflater.inflate(R.layout.item_details_view, null); holder = new ViewHolder(); holder.txtDesc = (TextView) convertView.findViewById(R.id.desc); holder.txtTitle = (TextView) convertView.findViewById(R.id.title); holder.imageView = (ImageView) convertView.findViewById(R.id.icon); holder.add = (Button) convertView .findViewById(R.id.button1); holder.sub = (Button) convertView .findViewById(R.id.button2); convertView.setTag(holder); } else holder = (ViewHolder) convertView.getTag(); holder.txtDesc.setText(rowItem.getDesc()); holder.txtTitle.setText(rowItem.getTitle()); holder.imageView.setImageResource(rowItem.getImageId()); holder.add.setTag(position); holder.sub.setTag(position); holder.add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Adds 1 to the counter int counter=0; counter = counter + 1; } }); holder.sub.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Subtract 1 from counter int counter=0; counter = counter - 1; } }); return convertView; } } </code></pre> <p>Thisi is my Activity class</p> <pre><code>public class ListViewImagesActivity extends Activity implements OnItemClickListener { public static final String[] titles = new String[] { "EggBurger", "cheesBurger", "KingBurger", "Mixed" }; public static final String[] descriptions = new String[] {"Select 0 Item" }; public static final Integer[] images = { R.drawable.burger1, R.drawable.burger2, R.drawable.burger3, R.drawable.burger4 }; ListView listView; List&lt;RowItem&gt; rowItems; Button add,sub; int counter=0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); rowItems = new ArrayList&lt;RowItem&gt;(); for (int i = 0; i &lt; titles.length; i++) { RowItem item = new RowItem(images[i], titles[i], descriptions[0]); rowItems.add(item); } listView = (ListView) findViewById(R.id.list); ItemListBaseAdapter adapter = new ItemListBaseAdapter(this, R.layout.item_details_view, rowItems); listView.setAdapter(adapter); listView.setOnItemClickListener(this); } @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { Toast toast = Toast.makeText(getApplicationContext(), "Item " + (position + 1) + ": " + rowItems.get(position), Toast.LENGTH_SHORT); toast.setGravity(Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0); toast.show(); } } </code></pre> <p>this is my RowItem class</p> <pre><code>public class RowItem { private int imageId; private String title; private String desc; public RowItem(int imageId, String title, String desc) { this.imageId = imageId; this.title = title; this.desc = desc; } public int getImageId() { return imageId; } public void setImageId(int imageId) { this.imageId = imageId; } public String getDesc() { return desc; } public void setDesc(String desc) { this.desc = desc; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } @Override public String toString() { return title + "\n" + desc; } } </code></pre> <p>this is my main.xml </p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;ListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="wrap_content" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>this is my item_details_view</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;ImageView android:id="@+id/icon" android:layout_width="80dp" android:layout_height="80dp" android:paddingLeft="10dp" android:paddingRight="10dp" /&gt; &lt;TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@+id/icon" android:paddingBottom="10dp" android:textColor="#CC0033" android:textSize="16dp" /&gt; &lt;TextView android:id="@+id/desc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/title" android:layout_toRightOf="@+id/icon" android:paddingLeft="10dp" android:textColor="#3399FF" android:textSize="14dp" /&gt; &lt;Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/button2" android:layout_marginRight="16dp" android:layout_toLeftOf="@+id/button2" android:text="Add" /&gt; &lt;Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/desc" android:layout_alignParentRight="true" android:text="Sub" /&gt; &lt;/RelativeLayout&gt; </code></pre>
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    1. PO
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    1. PTQuestion
    1. USIllusionist
    1. USIllusionist
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. COso what is the problem?
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      1. POHow to add/remove quantity in a list view
      1. USAmulya Khare
    2. COi didn't know what changes i have to made in my adapter class inside onclicklistner to perform the task
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      1. POHow to add/remove quantity in a list view
      1. USIllusionist
    3. COYour code doesn't show anything like `quantity`?
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      1. POHow to add/remove quantity in a list view
      1. USAmulya Khare
 

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