In this article I would like to share with you my newest application that I wrote using Android I called this program temperature converter using Android. It allows the user to convert temperature from Fahrenheit to Celsius and Celsius to Fahrenheit. I am still a beginner in android programming but I found it very useful and enjoyable way to learn how to program. I hope you will find my work useful.
I am currently accepting programming and web development work kindly contact me in the following email address for further details. Thank you.
My email address are the following jakerpomperada@gmail.com and jakerpomperada@yahoo.com.
My mobile number here in the Philippines is 09173084360.
My telephone number at home here in Bacolod City, Negros Occidental is (034) 4335675.
Sample Program Output
Program Listing
MainActivity.java
package com.example.jacob.temperature_converter;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.RadioButton;
import android.widget.Toast;
import android.text.TextUtils;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
double temp_given;
public void About(View v) {
startActivity(new Intent(this, About.class));
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); }
public void convert_temp(View V) {
final TextView result = (TextView) findViewById(R.id.textView);
final EditText temp = (EditText) findViewById(R.id.editText2);
final RadioButton fahToCelsius = (RadioButton) findViewById(R.id.radFahToCelsius);
final RadioButton celToFahrenheit = (RadioButton) findViewById(R.id.radCelToFahrenheit);
temp_given = Double.parseDouble(temp.getText().toString());
if (fahToCelsius.isChecked()) {
double convert_celsius = ((temp_given - 32) * 5 / 9);
String str = String.format("%5.2f", convert_celsius);
double display_result = Double.valueOf(str);
result.setText(String.valueOf(display_result) + " degrees Celsius.");
fahToCelsius.setChecked(false);
}
if (celToFahrenheit.isChecked()) {
double convert_fahrenheit = ((temp_given * 9 / 5) + 32);
String str = String.format("%5.2f", convert_fahrenheit);
double display_result = Double.valueOf(str);
result.setText(String.valueOf(display_result) + " degrees Fahrenheit.");
celToFahrenheit.setChecked(false);
}
}
}
About.java
package com.example.jacob.temperature_converter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class About extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.jacob.temperature_converter.MainActivity"> <RelativeLayout android:layout_width="381dp" android:layout_height="504dp" app:layout_constraintEnd_toEndOf="parent" tools:layout_editor_absoluteY="3dp"> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:layout_alignParentTop="true" android:layout_marginStart="23dp" android:layout_marginTop="35dp" android:ems="10" android:hint="Enter Temperature" android:inputType="number" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignStart="@+id/radCelToFahrenheit" android:layout_marginBottom="43dp" android:onClick="About" android:text="About This Program" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:layout_alignStart="@+id/btnConvert" android:layout_below="@+id/btnConvert" android:layout_marginTop="35dp" android:textAppearance="@style/TextAppearance.AppCompat.Headline" tools:layout_editor_absoluteX="144dp" tools:layout_editor_absoluteY="511dp" /> <RadioGroup android:id="@+id/radioGroup" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignStart="@+id/editText2" android:layout_below="@+id/editText2" /> <RadioButton android:id="@+id/radFahToCelsius" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignStart="@+id/radioGroup" android:layout_below="@+id/radioGroup" android:layout_marginTop="30dp" android:text="Fahrenheit To Celsius" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> <RadioButton android:id="@+id/radCelToFahrenheit" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignStart="@+id/radFahToCelsius" android:layout_below="@+id/radFahToCelsius" android:layout_marginTop="34dp" android:text="Celsius To Fahrenheit" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> <Button android:id="@+id/btnConvert" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/radCelToFahrenheit" android:layout_marginTop="39dp" android:layout_toEndOf="@+id/radioGroup" android:onClick="convert_temp" android:text="Convert Temperature" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> </RelativeLayout> </android.support.constraint.ConstraintLayout>
activity_about.xml
<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="wrap_content" android:layout_height="wrap_content" tools:context="com.example.jacob.temperature_converter.About"> <RelativeLayout android:layout_width="382dp" android:layout_height="495dp" tools:layout_editor_absoluteX="0dp" tools:layout_editor_absoluteY="0dp"> <TextView android:id="@+id/textView6" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:layout_alignParentTop="true" android:layout_marginEnd="68dp" android:layout_marginTop="22dp" android:text="About This Program" android:textAppearance="@style/TextAppearance.AppCompat.Headline" /> <ImageView android:id="@+id/imageView5" android:layout_width="216dp" android:layout_height="320dp" android:layout_alignStart="@+id/textView6" android:layout_alignTop="@+id/textView6" app:srcCompat="@drawable/me" tools:layout_editor_absoluteX="82dp" tools:layout_editor_absoluteY="0dp" /> <TextView android:id="@+id/textView7" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentStart="true" android:text="This program was design and developed by Mr. Jake R. Pomperada. I live in Bacolod City, Negros Occidental Philippines. \n\nYou can email me in the following address jakerpomperada@yahoo.com and jakerpomperada@gmail.com \n\nThank you for using this software." android:textAppearance="@style/TextAppearance.AppCompat.Medium" android:textStyle="bold" /> </RelativeLayout> </android.support.constraint.ConstraintLayout>DOWNLOAD SOURCE CODE HERE
DOWNLOAD APK FILE HERE
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