Android点击事件的几种实现方式

   <ol>     <li> <p><strong>在每次使用时新实现一个OnClickListener接口</strong></p> <pre>  <code class="language-java">public class MainActivity extends Activity {   private Button btn;     @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       btn = (Button) findViewById(R.id.btnDoSomething);       btn.setOnClickListener(new View.OnClickListener() {           @Override           public void onClick(View v) {               doSomething(v);           }       });   }     public void doSomething(View view) {       /*do something here*/   }  }</code></pre> </li>     <li> <p><strong>让这个页面类实现OnClickListener接口</strong></p> <pre>  <code class="language-java">public class MainActivity extends Activity implements View.OnClickListener{   private Button btn;     @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       btn = (Button) findViewById(R.id.btnDoSomething);       btn.setOnClickListener(this);   }     @Override   public void onClick(View v) {       switch (v.getId()) {           case R.id.btnDoSomething:               doSomething(v);               break;           default:               break;       }   }     public void doSomething(View view) {       /*do something here*/   }  }</code></pre> </li>     <li> <p><strong>多组合少继承的原则，把OnClickListener接口作为一个属性放到页面类中</strong></p> <pre>  <code class="language-java">public class MainActivity extends Activity{   private Button btn;   private View.OnClickListener clickListener;     @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);         clickListener = new View.OnClickListener() {           @Override           public void onClick(View v) {               doSomething(v);           }       };       btn = (Button) findViewById(R.id.btnDoSomething);       btn.setOnClickListener(clickListener);   }     public void doSomething(View view) {       /*do something here*/   }  }</code></pre> </li>     <li> <p><strong>把类中的点击事件看作是一个对象，新建一个类来实现这些事件</strong></p> <pre>  <code class="language-java">public class ClickListener implements View.OnClickListener{     @Override   public void onClick(View v) {       doSomething(v);   }     private void doSomething(View view) {       /*do something here*/   }  }</code></pre> <p>在使用的时候，新建或者组合使用</p> <pre>  <code class="language-java">public class MainActivity extends Activity{   private Button btn;   private ClickListener clickListener =  new ClickListener();     @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);         btn = (Button) findViewById(R.id.btnDoSomething);       btn.setOnClickListener(clickListener);   }  }</code></pre> </li>     <li> <p><strong>在java类中定义好点击事件要执行的方法，在布局文件xml中调用</strong></p> <p>activity_main.xml</p> <pre>  <code class="language-java"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:tools="http://schemas.android.com/tools"   android:id="@+id/activity_main"   android:layout_width="match_parent"   android:layout_height="match_parent"   tools:context="com.vip.veblonwang.myapplication.MainActivity">     <Button       android:id="@+id/btnDoSomething"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:text="share"       android:onClick="doSomething"/><!-- 这句是关键，点击时执行MainActivity中的doSomething方法 -->  </LinearLayout></code></pre> <p><strong>MainActivity .java</strong></p> <pre>  <code class="language-java">public class MainActivity extends Activity{     @Override   protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);   }     public void doSomething(View view) { //方法必须定义为public       /*do something here*/   }  }</code></pre> </li>    </ol>    <p>个人理解就上面几种实现方式了~</p>    <p>推荐使用 <strong>第三、四种</strong> 方式，其他方式不推荐</p>    <p> </p>    <p>来自：http://www.jianshu.com/p/926f4f6c1d74</p>    <p> </p>