TEMPERATURE   COVERTER

Objective:

string.xml:

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

<resources>

    <string name="app_name">Temperature</string>

    <color name="myColor">#3399CC</color>

    <string name="myClickHandler">myClickHandler</string>

    <string name="show">Result is:</string>

    <string name="celsius">to celsius</string>

    <string name="fahrenheit">to fahrenheit</string>

    <string name="calc">calculate</string>

    <color name="red">#FF0000</color>

</resources>

main.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:orientation="vertical"

    android:background="@color/myColor>

<EditText

              android:layout_height="wrap_content"

              android:id="@+id/editText1"

              android:layout_width="fill_parent"

              android:inputType="numberDecimal|numberSigned"></EditText>

         

<TextView

              android:id="@+id/Tview1"

              android:layout_height="wrap_content"

              android:layout_width="fill_parent"

              android:text="@string/show"

              android:textSize="40dp"

              android:textColor="@color/red"

              android:inputType="numberDecimal|numberSigned"></TextView>

               

 <RadioGroup

               android:layout_height="wrap_content"

               android:id="@+id/radioGroup1"

               android:layout_width="match_parent">

                  

                   <RadioButton

                             android:layout_width="wrap_content"

                             android:id="@+id/radio0"

                             android:layout_height="wrap_content"

                             android:text="@string/celsius"

                             android:textSize="25dp"

                             android:checked="true"></RadioButton>

                  

                   <RadioButton

                             android:layout_width="wrap_content"

                             android:id="@+id/radio1"

                             android:layout_height="wrap_content"

                             android:text="@string/fahrenheit"

                             android:textSize="25dp"></RadioButton>

          </RadioGroup>

         

          <Button

              android:id="@+id/button1"

              android:layout_width="wrap_content"

              android:layout_height="wrap_content"

              android:text="@string/calc"></Button>

</LinearLayout>

TempConvertActivity.java

package com.android.temp;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.RadioButton;

import android.widget.TextView;

import android.widget.Toast;

public class TempConvertActivity extends Activity implements View.OnClickListener{

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

          EditText etext;

          TextView Tview1;

          RadioButton cbutton,fbutton;

          Button btn;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

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

        Tview1=(TextView)findViewById(R.id.Tview1);

        cbutton=(RadioButton)findViewById(R.id.radio0);

        fbutton=(RadioButton)findViewById(R.id.radio1);

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

        btn.setOnClickListener(this);

    }

          @Override

          public void onClick(View v) {

                   // TODO Auto-generated method stub

                   if (etext.getText().length() == 0) {

                             Toast.makeText(this, "Please enter a valid number" , Toast.LENGTH_LONG).show();

                   }

                   else

                   {

                             float inputValue = Float.parseFloat(etext.getText().toString());

                             if(cbutton.isChecked())

                             {

                                      float outputValue=(inputValue - 32)*5/9;

                                      String text=String.valueOf(outputValue);

                                      Tview1.setText(text);

                             }

                             else

                             {

                                      float outputValue=(inputValue*9)/5+ 32;

                                      String text=String.valueOf(outputValue);

                                      Tview1.setText(text);

                             }

                   }

          }

}