안드로이드 프로그래밍_직접 풀어보기 5-3 코드

// JAVA Code


package com.example.example_5_3;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    String changeTxt;

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

        LinearLayout.LayoutParams Lpara = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT);

        LinearLayout baseLayout = new LinearLayout(this);
        baseLayout.setOrientation(LinearLayout.VERTICAL);
        baseLayout.setBackgroundColor(Color.rgb(89, 146, 219));
        setContentView(baseLayout, Lpara);

        EditText editText = new EditText(this);
        editText.setText("");
        baseLayout.addView(editText);

        Button btn = new Button(this);
        btn.setText("버튼입니다.");
        btn.setBackgroundColor(Color.MAGENTA);
        baseLayout.addView(btn);

        TextView txtview = new TextView(this);
        txtview.setText("이것은 TextView 입니다.");
        baseLayout.addView(txtview);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                changeTxt = editText.getText().toString();
                txtview.setText(changeTxt);
            }
        });
    }
}