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Minggu, 20 Maret 2016

Membuat Aplikasi Kalkulator Sederhana Android Studio

    Nama               : Kadek Andre Afrizza
                                                            NIM                : 1404505094
                                                            Dosen              : I Putu Agus Eka Pratama,S.T.,M.T.
                                                            Universitas      : Universitas Udayana
                                                            Mata Kuliah    : Pemrograman Mobile

  1. Buat project baru dengan cara klik Start New Android Studio Project atau dengan cara klik New pada toolbar lalu klik New Project.
  2. Setelah itu masukkan nama aplikasi yaitu Aplikasi Kalkulator lalu klik Next.
  3. Tahap selanjutnya, centang Phone and Tablet lalu pilih API 15. Klik Next.
  4. Setelah tahap di atas selesai lalu pilih Blank Activity. Klik Next.
  5. Biarkan nama activity, nama layout tetap default. Klik Finish.
  6. 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.

    Selamat Mencoba!

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