Thursday 13 October 2011

Android Simple calculator program

This is a small calculator program for beginners.With this program you can learn adding buttons to UI,adding sliders to UI.This program uses simple functions like add(),sub(),div(),mul().
JAVA CODE
package simple.calculator;
import android.app.Activity;
import android.os.Bundle;
import android.text.InputType;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
public class SimpleCalculatorActivity extends Activity {
private EditText txtinput1;
private EditText txtinput2;
private EditText txtinput3;
private Button buttonte;
private Button buttonte1;
private Button buttonte2;
private Button buttonte3;
private Button buttonte46;
private Button buttonte47;
private Button buttonte48;
private Button buttonte49;
private Button buttonte50;
private Button buttonte51;
private Button buttonte52;
private Button buttonte53;
private Button buttonte54;
private Button buttonte55;
private ImageView imageView;
private double input1 =0;
private double input2 =0;
private double input3 =0;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.calc);
initctrls();}
public void onCreate1(Bundle bundle) {
super.onCreate(bundle);
/**Hello World Image JFD*/
/**BEGIN */
/**Create the ImageView */
ImageView HelloWorldImageView = new ImageView(this);
/**Set the ImageView to helloworld.png */
imageView.setImageResource(R.drawable.icon);
/**Set the ContentView to the ImageView */
setContentView(HelloWorldImageView);
/**END*/}
private void initctrls(){
txtinput1 = (EditText)findViewById(R.id.widget41);
txtinput2 = (EditText)findViewById(R.id.widget43);
txtinput3 = (EditText)findViewById(R.id.widget45);
buttonte = (Button)findViewById(R.id.widget56);
buttonte1 = (Button)findViewById(R.id.widget57);
buttonte2 = (Button)findViewById(R.id.widget58);
buttonte3 = (Button)findViewById(R.id.widget59);
buttonte46 = (Button)findViewById(R.id.widget46);
buttonte47 = (Button)findViewById(R.id.widget47);
buttonte48 = (Button)findViewById(R.id.widget48);
buttonte49 = (Button)findViewById(R.id.widget49);
buttonte50 = (Button)findViewById(R.id.widget50);
buttonte51 = (Button)findViewById(R.id.widget51);
buttonte52 = (Button)findViewById(R.id.widget52);
buttonte53 = (Button)findViewById(R.id.widget53);
buttonte54 = (Button)findViewById(R.id.widget54);
buttonte55 = (Button)findViewById(R.id.widget55);
buttonte.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ add(); }});
buttonte1.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ sub(); }});
buttonte2.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ mul(); }});
buttonte3.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ div(); }});
buttonte46.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(1); }});
buttonte47.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(2); }});
buttonte48.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(3); }});
buttonte49.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(4); }});
buttonte50.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(5); }});
buttonte51.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(6); }});
buttonte52.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(7); }});
buttonte53.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(8); }});
buttonte54.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(9); }});
buttonte55.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ num(0); }});
txtinput1.setInputType(InputType.TYPE_CLASS_NUMBER);
txtinput2.setInputType(InputType.TYPE_CLASS_NUMBER);
txtinput3.setInputType(InputType.TYPE_CLASS_NUMBER);}
void num(int y){
// int i =Integer.parseInt(txtinput1.getText().toString());
if(txtinput1.isFocused()){
txtinput1.append(String.valueOf(y));}
if(txtinput2.isFocused()){
txtinput2.append(String.valueOf(y));}
// txtinput1.setText("1");
// txtinput2.setText("1");}
private void add(){
input1=Double.parseDouble(txtinput1.getText().toString());
input2=Double.parseDouble(txtinput2.getText().toString());
input3 = (input1+input2);
txtinput3.setText(Double.toString(input3));}
private void sub(){
input1=Double.parseDouble(txtinput1.getText().toString());
input2=Double.parseDouble(txtinput2.getText().toString());
input3=(input1-input2);
txtinput3.setText(Double.toString(input3));}
 private void mul(){
input1=Double.parseDouble(txtinput1.getText().toString());
input2=Double.parseDouble(txtinput2.getText().toString());
input3=(input1*input2);
txtinput3.setText(Double.toString(input3));}
private void div(){
input1=Double.parseDouble(txtinput1.getText().toString());
input2=Double.parseDouble(txtinput2.getText().toString());
input3=(input1/input2);
 txtinput3.setText(Double.toString(input3));}}
XML CODE
<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout android:id="@+id/LinearLayout1"
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<HorizontalScrollView
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 xmlns:android="http://schemas.android.com/apk/res/android">
 <ScrollView
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 xmlns:android="http://schemas.android.com/apk/res/android">
<AbsoluteLayout android:id="@+id/AbsoluteLayout1" android:layout_width="fill_parent" android:layout_height="fill_parent">
<AbsoluteLayout android:id="@+id/AbsoluteLayout1" android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="vertical">
<TextView android:id="@+id/widget40"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="I1"
android:layout_x="15px"
android:layout_y="16px">
</TextView>
<EditText android:id="@+id/widget41"
android:layout_width="350px"
android:layout_height="80px"
android:inputType="number"
android:text=""
android:textSize="18sp"
android:layout_x="40px"
android:layout_y="16px">
</EditText>
<TextView android:id="@+id/widget42"
android:layout_width="350px"
android:layout_height="wrap_content"
android:text="I2"
android:layout_x="15px"
android:layout_y="100px">
</TextView>
<EditText android:id="@+id/widget43"
android:layout_width="350px"
android:layout_height="80px"
android:text=""
android:textSize="18sp"
android:layout_x="40px"
android:layout_y="90px">
</EditText>
<TextView android:id="@+id/widget44"
android:layout_width="wrap_content"
android:layout_height="28px"
android:text="Output"
android:layout_x="2px"
android:layout_y="190px">
</TextView>
<EditText android:id="@+id/widget45"
android:layout_width="425px"
android:layout_height="80px"
android:text=""
android:textSize="18sp"
android:layout_x="19px"
android:layout_y="205px">
</EditText>
<Button android:id="@+id/widget46"
android:layout_width="55px"
android:layout_height="55px"
android:text="1"
android:layout_x="40px"
android:layout_y="323px">
</Button>
<Button android:layout_width="55px"
android:layout_height="55px"
android:text="2"
android:layout_x="138px"
android:layout_y="321px"
android:id="@+id/widget47">
</Button>
<Button android:id="@+id/widget48"
android:layout_width="55px"
android:layout_height="55px"
android:text="3"
android:layout_x="236px"
android:layout_y="321px">
</Button>
<Button android:id="@+id/widget49"
android:layout_width="55px"
android:layout_height="55px"
android:text="4"
android:layout_x="40px"
android:layout_y="383px">
</Button>
<Button android:id="@+id/widget50"
android:layout_width="55px"
android:layout_height="55px"
android:text="5"
android:layout_x="138px"
android:layout_y="381px">
</Button>
<Button android:id="@+id/widget51"
android:layout_width="55px"
android:layout_height="55px"
android:text="6"
android:layout_x="236px"
android:layout_y="381px">
</Button>
<Button android:id="@+id/widget52"
android:layout_width="55px"
android:layout_height="55px"
android:text="7"
android:layout_x="40px"
android:layout_y="443px">
</Button>
<Button android:id="@+id/widget53"
android:layout_width="55px"
android:layout_height="55px"
android:text="8"
android:layout_x="138px"
android:layout_y="441px">
</Button>
<Button android:id="@+id/widget54"
android:layout_width="55px"
android:layout_height="55px"
android:text="9"
android:layout_x="236px"
android:layout_y="441px">
</Button>
<Button android:id="@+id/widget55"
android:layout_width="55px"
android:layout_height="55px"
android:text="0"
android:layout_x="138px"
android:layout_y="501px">
</Button>
<Button android:layout_width="105px"
android:layout_height="55px"
android:text="+"
android:layout_x="361px"
android:layout_y="321px"
android:id="@+id/widget56">
</Button>
<Button android:id="@+id/widget57"
android:layout_width="105px"
android:layout_height="55px"
android:text="-"
android:layout_x="361px"
android:layout_y="381px">
</Button>
<Button android:id="@+id/widget58"
android:layout_width="105px"
android:layout_height="55px"
android:text="*"
android:layout_x="361px"
android:layout_y="441px">
</Button>
<Button android:id="@+id/widget59"
android:layout_width="105px"
android:layout_height="55px"
android:text="/"
android:layout_x="361px"
android:layout_y="501px">
</Button>
<ImageView android:src="@drawable/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_x="-5dip"
android:layout_y="380dip"
android:id="@+id/imageView1">
</ImageView>
</AbsoluteLayout>
</AbsoluteLayout>
</ScrollView>
</HorizontalScrollView>
</AbsoluteLayout>                                                      

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