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PODeclaring that a class implements OnClickListener vs. declaring it yourself?
 

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    <p>Apologies for my title, I am having trouble properly articulating the problem.</p> <p>I have seen <code>OnCLickListener</code> implemented in two ways. The first is done by signifying that your class implements <code>OnCLickListener</code>. The second accomplishes the task by having you declare it yourself.</p> <p>Why in the first option can you simply put <code>this</code> as your <code>setOnCLickListener</code> argument, but in the second you must go through the trouble of creating the <code>OnClickListener</code> object yourself?</p> <p>The first:</p> <pre><code>public class WidgetConfig extends Activity implements OnClickListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.widgetconfig); Button b = (Button)findViewById(R.id.bwidgetconfig); b.setOnClickListener(this); } //onClick defined outside of the onCreate @Override public void onClick(View arg0) { // TODO Auto-generated method stub } </code></pre> <p>The Second:</p> <pre><code>public class WidgetConfig extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.widgetconfig); Button b = (Button)findViewById(R.id.bwidgetconfig); b.setOnClickListener(bListener); } private Button bListener = new OnClickListener(){ b.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { //TO-DO } }); </code></pre>
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    1. USMichal Borek
    1. USDick Lucas
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    1. COthis question is nowhere related to android, it related to your JAVA concepts
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      1. USKapil Vats
    2. COWay #3 - Just FYI, you can also create your own custom class, have it implement the ClickListener interface, and then create a new instance of that listener. You then call: setOnClickListener(new YourCustomClass()). It's a good way to encapsulate the code which handles your click actions.
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      1. USSwifty McSwifterton
 

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