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A Simple Android Application For Adding Two Numbers Reviewed by Members Rating: 10 Vote(s) - 3.2 Average 100 1
#1
Hi, I am practising on android app I've made an simple app for adding two number:

Firstly modifying the .xml file in addition/res/layout/main.xml which is responsible for the layout of the application.

Code:
<?xml version="1.0" encoding="utf-8"?>
    <AbsoluteLayout android:id="@+id/widget0"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <TextView android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="ADDITION OF NUMBERS"
     android:id="@+id/textView1"
     android:layout_x="73dip"
     android:layout_y="28dip"></TextView>
    <TextView android:layout_width="wrap_content"
    android:layout_x="36dip"
    android:layout_height="wrap_content"
    android:text="First Amount"
    android:id="@+id/textView2"
    android:layout_y="80dip"></TextView>
    <EditText android:text=""
    android:layout_width="wrap_content"
    android:layout_x="172dip"
    android:id="@+id/amount1"
    android:layout_height="wrap_content"
    android:layout_y="62dip"></EditText>
    <TextView android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Second Amount"
    android:id="@+id/textView3"
    android:layout_x="36dip"
    android:layout_y="169dip"></TextView>
    <EditText android:text=""
    android:layout_width="wrap_content"
    android:layout_x="169dip"
    android:id="@+id/amount2"
    android:layout_height="wrap_content"
    android:layout_y="152dip"></EditText>
    <Button android:layout_width="wrap_content"
    android:id="@+id/calculate"
    android:layout_x="41dip"
    android:layout_height="wrap_content"
    android:text="Calculate"
    android:layout_y="232dip"></Button>
    <EditText android:text=""
    android:layout_width="wrap_content"
    android:layout_x="172dip"
    android:id="@+id/tt"
    android:layout_height="wrap_content"
    android:layout_y="232dip"></EditText>
    </AbsoluteLayout>

Now modify the addition/src/com.example.addition/addition.java as shown belowSadcom.example.addition is the package name)

Code:
package com.example.addition;


import android.app.Activity;

import android.os.Bundle;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Button;

import android.view.View;


public class test extends Activity
{
  EditText amount1;
  EditText amount2;
  TextView tt;
  Button calculate;
  double x=0;
  double y=0;
  double z=0;
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
      initControls();
  }
  private void initControls()
  {
      amount1=(EditText)findViewById(R.id.amount1);
      amount2=(EditText)findViewById(R.id.amount2);
      tt=(TextView)findViewById(R.id.tt);
      calculate=(Button)findViewById(R.id.calculate);
      calculate.setOnClickListener(new Button.OnClickListener()
      {public void onClick
      (View  v) { calculate();}});
  }
  private void calculate()
  {
      x=Double.parseDouble(amount1.getText().toString());
      y=Double.parseDouble(amount2.getText().toString());
      z=x+y;
      tt.setText(Double.toString(z));
  }
}


We are done.Now run the application in the android emulator.
 
  


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