TAMZ II - C2

/**
 * Author: Sajmon
 * TAMZ II: Beginner practise
 */

package com.sajmon.tamzIIc2;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class TAMZII_C2Activity extends Activity implements View.OnClickListener {

    protected static final int CALC_TO_CELSIUS = 1234;
    protected static final int CALC_TO_FAHRENHEIT = 1235;

    protected EditText inputData;
    protected Button btnCelsiusToFahren, btnFahrenToCelsius;
    protected TextView resultText;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        inputData = (EditText) findViewById(R.id.temp);
        btnCelsiusToFahren = (Button) findViewById(R.id.cTof);
        btnFahrenToCelsius = (Button) findViewById(R.id.fToc);
        resultText = (TextView) findViewById(R.id.resultText);
        btnCelsiusToFahren.setOnClickListener(this);
        btnFahrenToCelsius.setOnClickListener(this);

    }

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.cTof:
                resultText.setText(calculateTemperature(inputData.getText().toString(), CALC_TO_FAHRENHEIT));
            break;
            case R.id.fToc:
                resultText.setText(calculateTemperature(inputData.getText().toString(), CALC_TO_CELSIUS));
            break;
        }
    }

    private String calculateTemperature(String data, int type) {
        double inputTemp = Double.parseDouble(data);
        double temp = 0;
        switch (type) {
            case CALC_TO_CELSIUS:
                temp = ((inputTemp - 32) * 5) / 9;
            break;
            case CALC_TO_FAHRENHEIT:
                temp = ((inputTemp * 9) / 5) + 32;
            break;
        }
        return "Result is: " + String.valueOf(temp);
    }
}

XML layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="10dp">

    <EditText
        android:id="@+id/temp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
    />

    <LinearLayout
        android:id="@+id/innerLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/temp"
        android:layout_centerHorizontal="true"
        >
        <Button
            android:id="@+id/cTof"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/btnCtoF"
            />

        <Button
            android:id="@+id/fToc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/btnFtoC"
            />
    </LinearLayout>

    <TextView
        android:id="@+id/resultText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/innerLayout"
        android:gravity="center_horizontal"
        />
</RelativeLayout>

String refs:

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

    <string name="hello">Hello World, TAMZII_C2Activity!</string>
    <string name="app_name">TAMZII_C2</string>
    <string name="btnCtoF">Celsius to F.</string>
    <string name="btnFtoC">F. to Celsius</string>

</resources>