MEMBUAT APLIKASI KALKULATOR SEDERHANA
3/13/2016
Nama : Tania Maria O. S
NIM : 1404505098
Mata
Kuliah : Pemrograman Mobile ( C )
Dosen : I Putu Agus Eka Pratama S.T., M.T.
Jurusan/
Fakultas/ Universitas : Teknologi Informasi/ Teknik/ Universitas Udayana
- Buat project baru dengan cara klik Start New Android Studio Project atau dengan cara klik New pada toolbar lalu klik New Project.
- Setelah itu masukkan nama aplikasi yaitu Aplikasi Kalkulator lalu klik Next.
- Tahap selanjutnya, centang Phone and Tablet lalu pilih API 15. Klik Next.
- Setelah tahap di atas selesai lalu pilih Blank Activity. Klik Next
- Biarkan nama activity, nama layout tetap default. Klik Finish
- Apabila projek sudah siap maka copy code di bawah ini
<?xml version="1.0"
encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.arya.kalkulator.MainActivity">
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:shrinkColumns="*"
android:stretchColumns="*"
android:background="#ffffff">
<TableRow
android:layout_height="match_parent"
android:layout_width="match_parent"
android:gravity="center_horizontal">
<EditText
android:id="@+id/result_id"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textSize="30dp"
android:layout_span="4"
android:padding="30dip"
android:background="#b0b0b0"
android:textColor="#000"/>
</TableRow>
<TableRow
android:id="@+id/tableRow1"
android:layout_height="match_parent"
android:layout_width="match_parent">
<Button
android:id="@+id/Btn7_id"
android:text="7"
android:textSize="20dp"
android:layout_weight="1"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btn7Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn8_id"
android:text="8"
android:textSize="20dp"
android:layout_weight="1"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btn8Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn9_id"
android:text="9"
android:textSize="20dp"
android:layout_weight="1"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btn9Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btnmulti_id"
android:text="*"
android:textSize="20dp"
android:layout_weight="1"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btnmultiClicked"
android:gravity="center"/>
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_height="match_parent"
android:layout_width="match_parent">
<Button
android:id="@+id/Btn4_id"
android:text="4"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:textSize="20dp"
android:layout_weight="1"
android:onClick="btn4Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn5_id"
android:text="5"
android:textSize="20dp"
android:layout_weight="1"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btn5Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn6_id"
android:text="6"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:textSize="20dp"
android:layout_weight="1"
android:onClick="btn6Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btndivide_id"
android:text="/"
android:layout_weight="1"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:textSize="20dp"
android:onClick="btndivideClicked"
android:gravity="center"/>
</TableRow>
<TableRow
android:id="@+id/tableRow3"
android:layout_height="match_parent"
android:layout_width="match_parent">
<Button
android:id="@+id/Btn1_id"
android:text="1"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:layout_weight="1"
android:textSize="20dp"
android:onClick="btn1Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn2_id"
android:text="2"
android:textSize="20dp"
android:layout_weight="1"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btn2Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn3_id"
android:text="3"
android:textSize="20dp"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:layout_weight="1"
android:onClick="btn3Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btnpersen_id"
android:text="%"
android:textSize="20dp"
android:layout_weight="1"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btnpersenClicked"
android:gravity="center"/>
</TableRow>
<TableRow
android:id="@+id/tableRow4"
android:layout_height="match_parent"
android:layout_width="match_parent">
<Button
android:id="@+id/Btnplus_id"
android:text="+"
android:textSize="20dp"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:layout_weight="1"
android:onClick="btnplusClicked"
android:gravity="center"/>
<Button
android:id="@+id/Btn0_id"
android:text="0"
android:textSize="20dp"
android:background="#cac9c9"
android:textColor="#000000"
android:padding="30dip"
android:layout_weight="1"
android:onClick="btn0Clicked"
android:gravity="center"/>
<Button
android:id="@+id/Btnminus_id"
android:text="-"
android:textSize="20dp"
android:background="#d3d3d3"
android:textColor="#000000"
android:padding="30dip"
android:layout_weight="1"
android:onClick="btnminusClicked"
android:gravity="center"/>
<Button
android:id="@+id/Btnequal_id"
android:text="="
android:textSize="20dp"
android:layout_weight="1"
android:background="#b0b0b0"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btnequalClicked"
android:gravity="center"/>
</TableRow>
<TableRow
android:layout_height="match_parent"
android:layout_width="match_parent"
android:gravity="center_horizontal"
>
<Button
android:id="@+id/Btnclear_id"
android:text="CLEAR"
android:textSize="20dp"
android:layout_weight="1"
android:background="#dcdcdc"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btnclearClicked"
android:gravity="center"/>
<Button
android:id="@+id/Btnexit_id"
android:text="EXIT"
android:textSize="20dp"
android:layout_weight="1"
android:background="#dcdcdc"
android:textColor="#000000"
android:padding="30dip"
android:onClick="btnexitClicked"
android:gravity="center"/>
</TableRow>
</TableLayout>
</RelativeLayout>Salin code di atas ke dalam activity_main.xml yang terletak pada folder app/res/layout
package com.example.arya.kalkulator;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
public String str ="";
Character op = 'q';
float i,num,numtemp;
EditText showResult;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
showResult = (EditText)findViewById(R.id.result_id);
}
public void btn0Clicked(View v){
insert(0);
}
public void btn1Clicked(View v){
insert(1);
}
public void btn2Clicked(View v){
insert(2);
}
public void btn3Clicked(View v){
insert(3);
}
public void btn4Clicked(View v){
insert(4);
}
public void btn5Clicked(View v){
insert(5);
}
public void btn6Clicked(View v){
insert(6);
}
public void btn7Clicked(View v){
insert(7);
}
public void btn8Clicked(View v){
insert(8);
}
public void btn9Clicked(View v){
insert(9);
}
public void btnplusClicked(View v){
perform();
op = '+';
}
public void btnminusClicked(View v){
perform();
op = '-';
}
public void btndivideClicked(View v){
perform();
op = '/';
}
public void btnmultiClicked(View v){
perform();
op = '*';
}
public void btnpersenClicked(View v){
perform();
op = '%';
}
public void btnequalClicked(View v){
calculate();
}
public void btnclearClicked(View v){
reset();
}
public void btnexitClicked(View v){
exit();
}
private void reset() {
// TODO Autogenerated method stub
str ="";
op ='q';
num = 0;
numtemp = 0;
showResult.setText("");
}
public void exit()
{
this.finish();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
private void insert(int j) {
// TODO Autogenerated method stub
str = str+Integer.toString(j);
num = Integer.valueOf(str).intValue();
showResult.setText(str);
}
private void perform() {
// TODO Autogenerated method stub
str = "";
calculateNoShow();
numtemp = num;
}
private void calculate() {
// TODO Autogenerated method stub
if(op == '+')
num = numtemp+num;
else if(op == '-')
num = numtemp-num;
else if(op == '/')
num = numtemp/num;
else if(op == '*')
num = numtemp*num;
else if(op == '%')
num = numtemp%num;
showResult.setText(""+num);
}
private void calculateNoShow() {
// TODO Autogenerate method stub
if(op == '+')
num = numtemp+num;
else if(op == '-')
num = numtemp-num;
else if(op == '/')
num = numtemp/num;
else if(op == '*')
num = numtemp*num;
else if(op == '%')
num = numtemp%num;
}
}
Salin code di atas ke MainActivity.java yang terletak pada folder app/java/com.example.[user].kalkulator
Apabila code-code di atas telah di copy maka saatnya untuk menjalankan aplikasi yang sudah di buat dan hasilnya akan seperti gambar di bawah
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