07-28 Cal Code
45460 단어 AndroidLessonAndroidLesson
계산기 라이브러리
- implementation 'io.apisense:rhino-android:1.0'
activity_main
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat
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">
<androidx.appcompat.widget.LinearLayoutCompat
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#485FB3">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cal"
android:textSize="20dp"
android:layout_gravity="center"
android:layout_marginStart="10dp"/>
</androidx.appcompat.widget.LinearLayoutCompat>
<androidx.appcompat.widget.LinearLayoutCompat
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
</androidx.appcompat.widget.LinearLayoutCompat>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_weight="3"
android:layout_width="match_parent"
android:layout_height="0dp">
<EditText
android:id="@+id/etCount"
android:layout_width="351dp"
android:layout_height="52dp"
android:ems="10"
android:inputType="textPersonName"
android:text="0"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn1"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="1"
app:layout_constraintStart_toStartOf="@+id/etCount"
app:layout_constraintTop_toBottomOf="@+id/etCount" />
<Button
android:id="@+id/btn2"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="2"
app:layout_constraintStart_toEndOf="@+id/btn1"
app:layout_constraintTop_toTopOf="@+id/btn1" />
<Button
android:id="@+id/btn3"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="3"
app:layout_constraintStart_toEndOf="@+id/btn2"
app:layout_constraintTop_toTopOf="@+id/btn2" />
<Button
android:id="@+id/btnAdd"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="+"
app:layout_constraintEnd_toEndOf="@+id/etCount"
app:layout_constraintStart_toEndOf="@+id/btn3"
app:layout_constraintTop_toTopOf="@+id/btn3" />
<Button
android:id="@+id/btn4"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="4"
app:layout_constraintStart_toStartOf="@+id/btn1"
app:layout_constraintTop_toBottomOf="@+id/btn1" />
<Button
android:id="@+id/btn5"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="5"
app:layout_constraintStart_toStartOf="@+id/btn2"
app:layout_constraintTop_toBottomOf="@+id/btn1" />
<Button
android:id="@+id/btn6"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="6"
app:layout_constraintStart_toStartOf="@+id/btn3"
app:layout_constraintTop_toTopOf="@+id/btn5" />
<Button
android:id="@+id/btnMinus"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="-"
app:layout_constraintStart_toStartOf="@+id/btnAdd"
app:layout_constraintTop_toTopOf="@+id/btn6" />
<Button
android:id="@+id/btn7"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="7"
app:layout_constraintStart_toStartOf="@+id/btn4"
app:layout_constraintTop_toBottomOf="@+id/btn4" />
<Button
android:id="@+id/btn8"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="8"
app:layout_constraintStart_toStartOf="@+id/btn5"
app:layout_constraintTop_toTopOf="@+id/btn7" />
<Button
android:id="@+id/btn9"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="9"
app:layout_constraintStart_toStartOf="@+id/btn6"
app:layout_constraintTop_toTopOf="@+id/btn8" />
<Button
android:id="@+id/btnDup"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="*"
app:layout_constraintStart_toStartOf="@+id/btnMinus"
app:layout_constraintTop_toTopOf="@+id/btn9" />
<Button
android:id="@+id/btn0"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="0"
app:layout_constraintStart_toStartOf="@+id/btn7"
app:layout_constraintTop_toBottomOf="@+id/btn7" />
<Button
android:id="@+id/btnClear"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="C"
android:textColor="@android:color/holo_red_dark"
app:layout_constraintStart_toStartOf="@+id/btn8"
app:layout_constraintTop_toTopOf="@+id/btn0" />
<Button
android:id="@+id/btnDivide"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="/"
app:layout_constraintStart_toStartOf="@+id/btn9"
app:layout_constraintTop_toTopOf="@+id/btnClear" />
<Button
android:id="@+id/btnEqual"
android:layout_width="80dp"
android:layout_height="wrap_content"
android:text="="
app:layout_constraintStart_toStartOf="@+id/btnDup"
app:layout_constraintTop_toTopOf="@+id/btnDivide" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.appcompat.widget.LinearLayoutCompat
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
</androidx.appcompat.widget.LinearLayoutCompat>
</androidx.appcompat.widget.LinearLayoutCompat>
MainActivity
package com.com.cal;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String TAG = "MainActivity2";
private EditText etCount;
// 배열로 버튼을 선언하는 것이 훨씬 간결하고 편하다.
private Button[] btn = new Button[16];
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.d(TAG, "onCreate: Start");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
initListener();
}
// View를 찾는 함수
private void init(){
etCount =findViewById(R.id.etCount);
btn[0] = findViewById(R.id.btn0);
btn[1] = findViewById(R.id.btn1);
btn[2] = findViewById(R.id.btn2);
btn[3] = findViewById(R.id.btn3);
btn[4] = findViewById(R.id.btn4);
btn[5] = findViewById(R.id.btn5);
btn[6] = findViewById(R.id.btn6);
btn[7] = findViewById(R.id.btn7);
btn[8] = findViewById(R.id.btn8);
btn[9] = findViewById(R.id.btn9);
btn[10] = findViewById(R.id.btnAdd);
btn[11] = findViewById(R.id.btnMinus);
btn[12] = findViewById(R.id.btnDup);
btn[13] = findViewById(R.id.btnDivide);
btn[14] = findViewById(R.id.btnClear);
btn[15] = findViewById(R.id.btnEqual);
}
private void initListener(){
for(int i = 0; i <14; i++){
btn[i].setOnClickListener(this);
}
btn[14].setOnClickListener(v ->{
String result = "";
etCount.setText(result);
});
btn[15].setOnClickListener(v ->{
String setData = etCount.getText().toString();
String result = Eval.cal(setData);
etCount.setText(result);
});
}
@Override
public void onClick(View v) {
Button btn = (Button) v; // 다 버튼형태이므로 버튼으로 통일 가능
Log.d(TAG, "onClick: " + btn.getText());
etCount.append(btn.getText());
}
}
Eval
package com.com.cal;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
public class Eval {
public static String cal(String result){
ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
try {
return engine.eval(result).toString();
} catch (ScriptException e) {
e.printStackTrace();
}
return null;
}
}
Author And Source
이 문제에 관하여(07-28 Cal Code), 우리는 이곳에서 더 많은 자료를 발견하고 링크를 클릭하여 보았다 https://velog.io/@ruinak_4127/07-28-Cal-Code저자 귀속: 원작자 정보가 원작자 URL에 포함되어 있으며 저작권은 원작자 소유입니다.
우수한 개발자 콘텐츠 발견에 전념 (Collection and Share based on the CC Protocol.)