android中多个按钮用一个监听器监听怎么写，求具体的代码，谢谢。

android中多个按钮用一个监听器监听怎么写，求具体的代码，谢谢。

1、先申明一个监听对象
2、不同按钮设置同一个监听对象
3、监听中，通过按钮的id判断是哪个按钮的点击事件
代码如下
1、new监听
OnClickListener clickListener = new OnClickListener(){
@Override
public void onClick(View v) {
if (v.getId()==R.id.button1){//按钮1
}else if(v.getId()==R.id.button2}{//按钮2
}
}
2、设置监听
Button btn1 = (Button)findViewById(R.id.button1);
Button btn2 = (Button)findViewById(R.id.button1);
btn1.setOnClickListener(clickListener);
btn2.setOnClickListener(clickListener);

public static class PlaceholderFragment extends Fragment implements OnClickListener { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); button1 = (Button) rootView.findViewById(R.id.button1); button2 = (Button) rootView.findViewById(R.id.button2); button3 = (Button) rootView.findViewById(R.id.button3); button4 = (Button) rootView.findViewById(R.id.button4); button1.setOnClickListener(this); button2.setOnClickListener(this); button3.setOnClickListener(this); button4.setOnClickListener(this); return rootView; } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.button1: Toast.makeText(getActivity(), "这是BUTTON1", Toast.LENGTH_SHORT).show(); break; case R.id.button2: Toast.makeText(getActivity(), "这是BUTTON2", Toast.LENGTH_SHORT).show(); break; case R.id.button3: Toast.makeText(getActivity(), "这是BUTTON3", Toast.LENGTH_SHORT).show(); break; case R.id.button4: Toast.makeText(getActivity(), "这是BUTTON4", Toast.LENGTH_SHORT).show(); break; default: break; } } }