Button bt_Demo = (Button)findViewById(R.id.bt_Demo);
 bt_Demo.setOnClickListener(new OnClickListener() {
 @Override
 public void onClick(View v) {
    //具体点击操作的逻辑
 }
 });

Button[] demoBtns ;
……
for(Button button : demoBtns ){
   button.setOnClickListener(listener);
}

 private OnClickListener listener = new OnClickListener(){ 
 @Override
 public void onClick(View arg0) {
  // TODO Auto-generated method stub 
  switch(arg0.getId()){ 
   case R.id.btn_Demo:
      //具体点击操作的逻辑
      break;
   default:
      break;
   }
 }
 }

Button bt_Demo = (Button)findViewById(R.id.bt_Demo);
 bt_Demo.setOnClickListener(new ButtonListener());
 private class ButtonListener implements OnClickListener{
 @Override
 public void onClick(View arg0) {
   // TODO Auto-generated method stub 
   switch(arg0.getId()){ 
   case R.id.btn_Demo:
      //具体点击操作的逻辑
      break;
   default:
      break;
   }
 } 
 }

 public class MyActivity extends Activity implements OnClickListener {
  @Override 
  public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.main);
   //按纽
   Button btn_Demo = (Button)findViewById(R.id.bt_Demo);
   bt_Demo.setOnClickListener(this); 
  ｝

  @Override 
  public void onClick(View v) {
   switch(arg0.getId()){ 
   case R.id.btn_Demo:
      //具体点击操作的逻辑
      break;
   default:
      break;
   }
  }
 ｝

<TextView
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:clickable="true"
     android:onClick="onTextViewClick"
     android:text="点击事件"
     android:textSize="16sp" />

//在代码中实现onTextViewClick()方法即可。
public void onTextViewClick(){
  //具体点击操作的逻辑
}