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    <p>(1) There is one way to pass value from Adapter to Activity on which adapter is set,</p> <p>i.e we write listview.setadapter(xyzadapter); in MainActivity, and we want to pass value from xyzadapter to MainActivity, then only one way I know, make one interface, define one method in that with parameters for passing value, and then implement it on adapter class,</p> <p>(2) If we want to pass values from adapter to another activity in which it is not set, then we can use putExtra method to pass value,</p> <p>Let me know if you have any issue...</p> <p><strong>Edited:</strong> for (1) answer</p> <p>make one interface in your main package:</p> <pre><code>public interface DataTransferInterface { public void setValues(ArrayList&lt;?&gt; al); } </code></pre> <p>in your adapter class make object of Interface:</p> <p>below this line public class CartAdapter extends BaseAdapter { and before constructor:</p> <pre><code>DataTransferInterface dtInterface; </code></pre> <p>in your construction pass this interface</p> <p>in CartAdapter use this constructor:</p> <pre><code>public CartAdapter(Activity a, DataTransferInterface dtInterface) { // TODO Auto-generated constructor stub activity = a; this.dtInterface = dtInterface; inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } </code></pre> <p>and use dtInterface.setValues(your Values to pass to Activity)</p> <p>Now in your CartActivity.java</p> <p>implement that interface like:</p> <pre><code>public class CartActivity extends Activity implements DataTransferInterface { </code></pre> <p>and change </p> <pre><code>mViewCartAdpt = new CartAdapter(CartActivity.this); </code></pre> <p>to</p> <pre><code>mViewCartAdpt = new CartAdapter(CartActivity.this, this); </code></pre> <p>now you will see red line below CartActivity (just move your mouse cursor on CartActivity) that shows add unimplemented methods, click on that will override setValues method</p> <pre><code>@Override public void setValues(ArrayList&lt;?&gt; al) { // TODO Auto-generated method stub } </code></pre> <p>you can use Any type of data to pass instead of ArrayList</p> <p>Let me know if you have any ussue:</p>
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    1. POHow to Pass Values from Adapter to Activity
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    1. COi have tried several times,but with your concept i think you are right, please use my above code and show me the way how can i achieve my target?
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    2. CO@Sneha: please check my edited answer
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