[안드로이드프로그래밍6판] 5장 직접 풀어보기 5-2, 실습 5-1

정답지아닙니다.

블로그 주인이 쓴 답지이므로

오타, 오류 있을 수 있습니다.

(댓글로 알려주시면 정정하겠습니다!)

 

 

직접 풀어보기 5-2

AVD 화면

 

<xml 코드>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:layout_weight="1"
        android:background="#FF0000">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:layout_weight="1"></LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:layout_weight="1">
            <LinearLayout
                android:layout_weight="1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="#FFF200"
                android:orientation="vertical">
            </LinearLayout>
            <LinearLayout
                android:layout_weight="1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:background="@color/black">
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>

        <LinearLayout
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#0000FF">
        </LinearLayout>

</LinearLayout>

▶ 복습 필요

- 중복 레이아웃 구조 헷갈리지 않게 반복하기

 

 

 

---

* xml 파일없이 화면 코딩

 

 

실습 5-1

AVD 화면

 

<java 코드> - 그냥 베끼면서 익힘, 나중에 복습 필요

package com.cookandroid.practice5_1;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_main);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT);
        LinearLayout baseLayout = new LinearLayout(this);
        baseLayout.setOrientation(LinearLayout.VERTICAL);
        baseLayout.setBackgroundColor(Color.rgb(0,255,0));
        setContentView(baseLayout, params);

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

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getApplicationContext(), "코드로 생성한 버튼입니다.",
                Toast.LENGTH_SHORT).show();
            }
        });
    }
}

 

직접 풀어보기 5-3

AVD 화면

 

<java 코드>

package com.cookandroid.myself5_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;

public class MainActivity extends AppCompatActivity {

    String result;

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

        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT);
        LinearLayout baseLayout = new LinearLayout(this);
        baseLayout.setOrientation(LinearLayout.VERTICAL);
        setContentView(baseLayout, params);

        EditText edit = new EditText(this);

        Button btn = new Button(this);
        btn.setText("버튼입니다");
        btn.setBackgroundColor(Color.YELLOW);

        TextView tv = new TextView(this);
        tv.setText("");
        tv.setTextColor(Color.RED);
        tv.setTextSize(20);

        baseLayout.addView(edit);
        baseLayout.addView(btn);
        baseLayout.addView(tv);

        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                result = edit.getText().toString();
                tv.setText(result);
            }
        });
    }
}