1. UNIT 08
그림책 만들기 2/2
로봇 SW 콘텐츠 교육원
조용수

2. 학습 목표
Image / Text 변경
Event Listener

3. 글자를 바꾼다 public final void setText(CharSequence text) TextView tvPage;
@Override
protected void onCreate
(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText("1"); }

4. 글자를 바꾼다 : String Resource
public final void setText(int resid)
TextView tvPage;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText(R.string.page); }

5. 그림을 바꾼다 public setImageResource(int resId) TextView tvPage;
ImageView ivBook;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText(R.string.page);
ivBook =(ImageView)findViewById(R.id.ivBook);
ivBook.setImageResource(R.drawable.p02); }

6. 실습 1: Layout 연결 및 초기화 Image View 를 연결하고 초기화
ImageView : 첫번째 Page
Button , TextView 를 연결하고 초기화
Button : 이전
TextView : 1
Button : 다음

7. Event Listener
사용자의 입력이나 View 안에서 발생하는 Event를 Activity 에 전달하기 위한 Listener 방법
Call back Method
Inner Class
Anonymous Class

8. OnClickListener : Interface
public class MainActivity extends Activity implements View.OnClickListener {
TextView tvPage;
ImageView ivBook;
Button btnPre;
Button btnNext;
int pageNumber = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText("" + pageNumber);
ivBook =(ImageView)findViewById(R.id.ivBook);
ivBook.setImageResource(R.drawable.p02);
btnPre = (Button)findViewById(R.id.btnPre);
btnNext = (Button)findViewById(R.id.btnNext);
btnPre.setOnClickListener(this); }
public void onClick(View v) {

9. OnClickListener : inner class
public class MainActivity extends Activity {
TextView tvPage;
ImageView ivBook;
Button btnPre;
Button btnNext;
int pageNumber = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText("" + pageNumber);
ivBook =(ImageView)findViewById(R.id.ivBook);
ivBook.setImageResource(R.drawable.p02);
btnPre = (Button)findViewById(R.id.btnPre);
btnNext = (Button)findViewById(R.id.btnNext);
BtnClickListener btnListener = new BtnClickListener();
btnPre.setOnClickListener(btnListener); }
private class BtnClickListener implements View.OnClickListener {
public void onClick(View v) {

10. OnClickListener : Anonymous Class
public class MainActivity extends Activity {
TextView tvPage;
ImageView ivBook;
Button btnPre;
Button btnNext;
int pageNumber = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText("" + pageNumber);
ivBook =(ImageView)findViewById(R.id.ivBook);
ivBook.setImageResource(R.drawable.p02);
btnPre = (Button)findViewById(R.id.btnPre);
btnNext = (Button)findViewById(R.id.btnNext);
btnPre.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) { }
});

11. onClick 에서 View 처리
public class MainActivity extends Activity implements View.OnClickListener {
TextView tvPage;
ImageView ivBook;
Button btnPre;
Button btnNext;
int pageNumber = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvPage = (TextView)findViewById(R.id.tvPage);
tvPage.setText("" + pageNumber);
ivBook =(ImageView)findViewById(R.id.ivBook);
ivBook.setImageResource(R.drawable.p02);
btnPre = (Button)findViewById(R.id.btnPre);
btnNext = (Button)findViewById(R.id.btnNext);
btnPre.setOnClickListener(this); }
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnNext:
break;
case R.id.btnPre:

12. 실습
이전/다음 버튼 동작에 따른 이미지 및 Page 변경