6일차 | BMI 계산기 완성, 아이콘 생성, values폴더 변경

벡터 이미지 만드는 법

<ImageView                                                           

android:src="@drawable/ic_baseline_accessibility_new_24"/>

<~.TextInputLayout>                                                    

app:startIconDrawable="@drawable/ic_baseline_favorite_24"

</~.TextInputLayout>                                                    

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <include
        android:id="@+id/too_bar"
        layout="@layout/tool_bar" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginStart="16dp"
        android:layout_marginEnd="16dp"
        android:orientation="vertical">

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:src="@drawable/ic_baseline_accessibility_24"
            app:tint="@color/purple_200" />
        <com.google.android.material.textfield.TextInputLayout

            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/label"
            app:startIconDrawable="@drawable/ic_baseline_favorite_border_24"
            app:startIconTint="@color/purple_200">

            <com.google.android.material.textfield.TextInputEditText
                android:id="@+id/heightEt"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="number" />

        </com.google.android.material.textfield.TextInputLayout>
        <com.google.android.material.textfield.TextInputLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp"
            android:hint="@string/label_1"
            app:startIconDrawable="@drawable/ic_weigth"
            app:startIconTint="@color/purple_200">

            <com.google.android.material.textfield.TextInputEditText
                android:id="@+id/weightEt"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:inputType="number" />

        </com.google.android.material.textfield.TextInputLayout>
        <Button
            android:id="@+id/btn_ok"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="50dp"
            android:text="@string/str_ok" />

    </LinearLayout>


</LinearLayout>

activity_result.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ResultActivity">

    <TextView
        android:id="@+id/resultTv"
        tools:text="경도 비만 입니다."
        android:textStyle="bold"
        android:textColor="@color/purple_200"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:textSize="22sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</androidx.constraintlayout.widget.ConstraintLayout>

tool_bar.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/purple_200">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_baseline_accessibility_24" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:text="BMI 계산기"
            android:textColor="@color/black"
            android:textSize="16dp"
            android:textStyle="bold" />
    </LinearLayout>

</androidx.appcompat.widget.Toolbar>

---

MainActivity.java

package com.example.myapp6;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = MainActivity.class.getName();


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

        EditText heightEt = findViewById(R.id.heightEt);
        EditText weightEt = findViewById(R.id.weightEt);
        Button btnOk = findViewById(R.id.btn_ok);

        // 이벤트 리스너 등록
        btnOk.setOnClickListener(v -> {
            // 값 --> String --> int
//            String height = heightEt.getText().toString();
            String height = heightEt.getText().toString();
            String weight = weightEt.getText().toString();
            if (height.length() < 1 || weight.length() < 1) {
                Toast.makeText(this, "빈 값이 있습니다.", Toast.LENGTH_SHORT).show();
            } else {
              // 목표 다른 화면으로 값을 전송
                Intent intent = new Intent(this, ResultActivity.class);
                intent.putExtra("height", Integer.parseInt(height));
                intent.putExtra("weight", Integer.parseInt(weight));
                startActivity(intent);
            }

        });


    }
}

ResultActivity.java

package com.example.myapp6;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.widget.TextView;

//shift F6 이름 수정ㄱ
public class ResultActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_result);
        Intent intent = getIntent();
        TextView resultTextView = findViewById(R.id.resultTv);
        if (intent != null) {
            int height = getIntent().getIntExtra("height", 0);
            int weight = getIntent().getIntExtra("weight", 0);
            //신장 --> ( cm / 100.0 ) -->  m ->Math
            // m
            //BMI 공식
            //weight / (height * height)
            double bmiValue = weight / Math.pow((height / 100.0), 2);
            Log.d("TAG", "bmiValue : " + bmiValue);
            String resultText = "";
            if (bmiValue < 18.5) {
                resultText = "저체중입니다";
            }else if(bmiValue <23) {
                resultText = "정상체중입니다";
            }else if(bmiValue <25){
                resultText="과체중입니다";
            }else if (bmiValue < 30){
                resultText ="경도비만입니다";
            }else{
                resultText = "중도비만 이상입니다";
            }
            resultTextView.setText(resultText +"\n"+ "("+bmiValue+")");
        }
    }
}

---

strings.xml

 

<resources>
    <string name="app_name">MyApp6</string>
    <string name="label">신장</string>
    <string name="label2">체중</string>
    <string name="str_ok">확인하기</string>
    <string name="label1">신장</string>
</resources>

 

텍스트 쓰고 그 위 커서 위치, alt + enter 하면 바꿀 수 있음

<Button android:text="@string/str_ok"/>
<~.TextInputLayout  android:hint="@string/label"></~.TextInputLayout>

 

 

 

---

themes.xml

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.MyApp6" parent="Theme.MaterialComponents.DayNight.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_200</item>
        <item name="colorPrimaryVariant">@color/purple_200</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>
    
    <!--위 : 원래 style , 아래, 변경한 style-->
    
    <style name="Theme.MyCustomAppTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_200</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>
</resources>