UNIT 08 그림책 만들기 2/2 로봇 SW 콘텐츠 교육원 조용수

학습 목표 Image / Text 변경 Event Listener

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"); }

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); }

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); }

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

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

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) {

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) {

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) { } });

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:

실습 이전/다음 버튼 동작에 따른 이미지 및 Page 변경