[Android] Button을 처리하는3가지 방법

Xml

<?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"
android:gravity="center_horizontal"
>
<Button
android:id="@+id/test1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test1"
/>
<Button
android:id="@+id/test2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test2"
/>
< /LinearLayout>

방법1

리스너 바로 등록하는 방법

Java

public void onCreate(Bundle savedInstanceState) 
    {
    	super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		findViewById(R.id.test1).setOnClickListener(mClickListener);
                findViewById(R.id.test2).setOnClickListener(mClickListener);
                
	  }


	Button.OnClickListener mClickListener = new View.OnClickListener() {
		public void onClick(View v) {			
			switch (v.getId()) {
			case R.id.test1:
			break;	
                        case R.id.test2:
			break;	                        		
		}
	};

방법2

Onclick 을 이용한 방법

 public void onCreate(Bundle savedInstanceState) 
    {
    	super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		Button btn1=(Button)findViewById(R.id.test1);
		btn1.setOnClickListener(this);
		Button btn2=(Button)findViewById(R.id.test2);
		btn2.setOnClickListener(this);
    }

	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.test1:			
			break;
		case R.id.test2:
			break;
		}
	}

방법3
객체에 id를 받은다음 바로 리스너로 등록하는 방법

public void onCreate(Bundle savedInstanceState) 
    {
    	super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		Button btn1=(Button)findViewById(R.id.test1);
		btn1.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
                           //do some thing
			}
		});

		Button btn2=(Button)findViewById(R.id.test2);
		btn2.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				//do some thing
			}
		});
    }