2swan

main.xml main.activity public class MainActivity4 extends AppCompatActivity { private CheckBox chk_red, chk_blue, chk_green; private TextView tv_result; private Button btn_result; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main4); chk_red = findViewById(R.id.chk_red); chk_blue = findViewById(R.id.chk_blue); ..

main.xml main.java public class MainActivity3 extends AppCompatActivity { private Spinner spinner; private TextView tv_result; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main3); spinner = (Spinner) findViewById(R.id.spinner); tv_result = (TextView) findViewById(R.id.tv_result); spinner.setOnItemSelectedListe..

public class MainActivity3 extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main3); // 액티비티 또는 프래그먼트가 생성이 되었을 때 이곳 내부구문을 실행 Log.e("onCreate","ENTER"); } @Override protected void onStart() { super.onStart(); Log.e("onStart","ENTER"); } @Override protected void onResume() { super.onResume..

.xml .java public class MainActivity2 extends AppCompatActivity { private WebView webView; private String url = "https://www.naver.com"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); webView = findViewById(R.id.webView); webView.getSettings().setJavaScriptEnabled(true); webView.loadUrl(url); webView.set..

.xml .java public class MainActivity2 extends AppCompatActivity { Button btn_dialog; TextView tv_result; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); //Dialog 팝업창 btn_dialog = findViewById(R.id.btn_dialog); tv_result = findViewById(R.id.tv_result); btn_dialog.setOnClickListener(new View.OnClickListener..

public class MainActivity2 extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); //Log 출력 String Lee = "이"; Log.e("MainActivity2 : ",Lee); //e는 에러 줄임말 (에러 형태로 출력) int a = 10; Log.e("MainActivity2", String.valueOf(a)); // int값은 로그로 출력할 때 String으로 출력하기 때문에 a값을 String 형태로 출력 } }

.JAVA public class MainActivity2 extends AppCompatActivity { private long backBtnTime = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); } @Override public void onBackPressed() { long curTime = System.currentTimeMillis(); long gapTime = curTime - backBtnTime; //현재 시간 가져와서 백버튼 누른 시간 빼준다 if(0 = gapTime ){..