一、專案結構

二、activity_main.xml程式碼

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
     >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
	
    <Button 
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="按鈕1"
        android:onClick="click"
        />
    <Button 
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="按鈕2"
        android:onClick="click"
        />
    <Button 
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="按鈕3"
        android:onClick="click"
        />
    <Button 
        android:id="@+id/button4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="按鈕4"
        android:onClick="click"
        />
</LinearLayout>
 

三、MainActivity.java程式碼

package com.example.button.click;

import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {
	private static final String TAG="MainActivity";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}

	public void click(View v) {
		switch (v.getId()) {
		case R.id.button1:
			Log.i(TAG,"點選按鈕1");
			break;
		case R.id.button2:
			Log.i(TAG,"點選按鈕2");
			break;
		case R.id.button3:
			Log.i(TAG,"點選按鈕3");
			break;
		case R.id.button4:
			Log.i(TAG,"點選按鈕4");
			break;

		default:
			break;
		}
		
	}

}