Action Task - 1

Demo:

 

1)action_task1.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#ffffff"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="20dp"

        android:text="Enter a Number"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="@color/color_black" />

    <EditText

        android:id="@+id/editText1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="1st Number" >

        <requestFocus />

    </EditText>

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginTop="20dp"

        android:text="Enter another Number"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="@color/color_black" />

    <EditText

        android:id="@+id/editText2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="2nd Number" />

    <LinearLayout

        android:id="@+id/linearLayout1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="25dp" >

        <Button

            android:id="@+id/button1"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Sub" />

        <Button

            android:id="@+id/button2"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Add" />

        <Button

            android:id="@+id/button3"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Mul" />

        <Button

            android:id="@+id/button4"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_weight="1"

            android:text="Div" />

    </LinearLayout>

    <TextView

        android:id="@+id/textView3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="@color/color_black" />

</LinearLayout>

2)Activity:

package com.venky.gvrtasks;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class ActionTask1Activity extends Activity implements OnClickListener {

      /** Called when the activity is first created. */

      EditText edtNumber1, edtNumber2;

      Button btnSub, btnAdd, btnMul, btnDiv;

      TextView tv1;

      int number1 = 0, number2 = 0, res = 0;

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.action_task1);

            edtNumber1 = (EditText) findViewById(R.id.editText1);

            edtNumber2 = (EditText) findViewById(R.id.editText2);

            tv1 = (TextView) findViewById(R.id.textView3);

            btnSub = (Button) findViewById(R.id.button1);

            btnAdd = (Button) findViewById(R.id.button2);

            btnMul = (Button) findViewById(R.id.button3);

            btnDiv = (Button) findViewById(R.id.button4);

            btnSub.setOnClickListener(this);

            btnAdd.setOnClickListener(this);

            btnMul.setOnClickListener(this);

            btnDiv.setOnClickListener(this);

      }

      public void onClick(View v) {

            // TODO Auto-generated method stub

            switch (v.getId()) {

            case R.id.button1:

                  number1 = Integer.parseInt(edtNumber1.getText().toString());

                  number2 = Integer.parseInt(edtNumber2.getText().toString());

                  res = number1 - number2;

                  tv1.setText("Subtraction = " + res);

                  edtNumber1.setText("");

                  edtNumber2.setText("");

                  res = 0;

                  break;

            case R.id.button2:

                  number1 = Integer.parseInt(edtNumber1.getText().toString());

                  number2 = Integer.parseInt(edtNumber2.getText().toString());

                  res = number1 + number2;

                  tv1.setText("Addition = " + res);

                  edtNumber1.setText("");

                  edtNumber2.setText("");

                  res = 0;

                  break;

            case R.id.button3:

                  number1 = Integer.parseInt(edtNumber1.getText().toString());

                  number2 = Integer.parseInt(edtNumber2.getText().toString());

                  res = number1 * number2;

                  tv1.setText("Multipication = " + res);

                  edtNumber1.setText("");

                  edtNumber2.setText("");

                  res = 0;

                  break;

            case R.id.button4:

                  number1 = Integer.parseInt(edtNumber1.getText().toString());

                  number2 = Integer.parseInt(edtNumber2.getText().toString());

                  res = number1 / number2;

                  tv1.setText("Division = " + res);

                  edtNumber1.setText("");

                  edtNumber2.setText("");

                  res = 0;

                  break;

            }

      }

}