Page 240 - MDP2020-1

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

et_id = findViewById( R.id.et_id );
et_pass = findViewById( R.id.et_pass );

backPressCloseHandler = new BackPressCloseHandler(this);

btn_register = findViewById( R.id.btn_register );
btn_register.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View view) {

Intent intent = new Intent( LoginActivity.this, RegisterActivity.class );
startActivity( intent );
}
});

btn_login = findViewById( R.id.btn_login );
btn_login.setOnClickListener( new View.OnClickListener() {
@Override
public void onClick(View view) {

final String userID = et_id.getText().toString();
final String userPass = et_pass.getText().toString();

Response.Listener<String> responseListener = new
Response.Listener<String>() {

@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject( response );
boolean success = jsonObject.getBoolean( "success" );

if(userID.equals("")){
AlertDialog.Builder builder = new AlertDialog.Builder(
LoginActivity.this );
dialog = builder.setMessage("아이디를 입력해주세요")

.setPositiveButton("확인",null)
.create();