Android另外一种形式的事件声明

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  
  <Button android:layout_width="match_parent" android:text="Button"
    android:layout_height="wrap_content" android:id="@+id/main_btn1"
    android:onClick="buttonClickHandler"/>
    
  <Button android:layout_width="match_parent" android:text="Button"
    android:layout_height="wrap_content" android:id="@+id/main_btn2"
    android:onClick="buttonClickHandler"/>
</LinearLayout>

直接代码

package com.raybinlearn.raybin;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends Activity
{
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);      
  }

  public void buttonClickHandler(View target)
  {
    switch (target.getId())
    {
    case R.id.main_btn1:
      Log.i("btn", "main_btn1");
      System.out.println("main_btn1");
      break;

    case R.id.main_btn2:
      Log.i("btn", "main_btn2");
      System.out.println("main_btn2");
      break;
    default:
      break;
    }
  }

}