First of all is main activity layout, I named it activity_conversion.xml. It's look like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="14dp"
android:text="@string/hello_world"
tools:context=".ConversionActivity" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:layout_marginTop="16dp" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/spinner1"
android:layout_below="@+id/spinner1"
android:layout_marginTop="20dp"
android:text="@string/hello2" />
<Spinner
android:id="@+id/spinner2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView2"
android:layout_below="@+id/textView2"
android:layout_marginTop="22dp" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/spinner2"
android:layout_below="@+id/spinner2"
android:layout_marginTop="14dp"
android:text="@string/insert_temp" />
<EditText
android:id="@+id/insert_editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:layout_marginTop="20dp"
android:ems="10" />
<Button
android:id="@+id/convert_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/insert_editText"
android:layout_below="@+id/insert_editText"
android:text="@string/convert_button" />
<EditText
android:id="@+id/result_editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/convert_button"
android:layout_alignParentBottom="true"
android:layout_marginBottom="20dp"
android:ems="10" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/result_editText"
android:layout_alignLeft="@+id/result_editText"
android:layout_marginBottom="22dp"
android:text="@string/result" />
</RelativeLayout>
And for the second is strings.xml. Here it's the code for strings.xml:
<resources>
<string name="app_name">TempConversion</string>
<string name="hello_world">Choose your temperature from</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_conversion">ConversionActivity</string>
<string name="hello2">Conversion to</string>
<string name="insert_temp">Insert your temperature</string>
<string name="result">The result is</string>
<string name="convert_button">Convert</string>
<string-array name="nama_suhu">
<item>Celcius</item>
<item>Fahrenheit</item>
<item>Kelvin</item>
<item>Reamur</item>
</string-array>
<string-array name="nama_suhu2">
<item>Celcius</item>
<item>Fahrenheit</item>
<item>Kelvin</item>
<item>Reamur</item>
</string-array>
</resources>
Next is the main activity, I named it with ConversionActivity.java. And the codes are:
package org.tempconversion;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
public class ConversionActivity extends Activity implements OnItemSelectedListener{
//private String suhu1, suhu2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_conversion);
final Spinner pilTemp1 = (Spinner)findViewById(R.id.spinner1);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.nama_suhu, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
pilTemp1.setAdapter(adapter);
final Spinner pilTemp2 = (Spinner)findViewById(R.id.spinner2);
ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this, R.array.nama_suhu2, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
pilTemp2.setAdapter(adapter2);
final EditText inputTemp = (EditText)findViewById(R.id.insert_editText);
final EditText resultTemp = (EditText)findViewById(R.id.result_editText);
final Button convertButton = (Button)findViewById(R.id.convert_button);
// event for button
convertButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String suhu1 = pilTemp1.getSelectedItem().toString();
String suhu2 = pilTemp2.getSelectedItem().toString();
String strSuhu = inputTemp.getText().toString();
String strSuhuAkhir = "";
double suhuAwal = Double.parseDouble(strSuhu);
double suhuResult = 0;
// selection for converting suhu
// start with Celcius first
if(suhu1.equals("Celcius")) {
if(suhu2.equals("Fahrenheit")) {
suhuResult = (suhuAwal * 9 / 5) + 32;
} else if(suhu2.equals("Kelvin")) {
suhuResult = suhuAwal + 273;
} else if(suhu2.equals("Reamur")) {
suhuResult = suhuAwal * 4 / 5;
} else {
suhuResult = suhuAwal;
}
} else if(suhu1.equals("Fahrenheit")) {
if(suhu2.equals("Celcius")) {
suhuResult = (suhuAwal - 32) * 5 / 9;
} else if(suhu2.equals("Kelvin")) {
suhuResult = (suhuAwal - 459) * 5 / 9;
} else if(suhu2.equals("Reamur")) {
suhuResult = (suhuAwal - 32) * 4 / 9;
} else {
suhuResult = suhuAwal;
}
} else if(suhu1.equals("Kelvin")) {
if(suhu2.equals("Celcius")) {
suhuResult = suhuAwal - 273;
} else if(suhu2.equals("Fahrenheit")) {
suhuResult = suhuAwal * 9 / 5 - 459;
} else if(suhu2.equals("Reamur")) {
suhuResult = (suhuAwal - 273) * 4 / 5;
} else {
suhuResult = suhuAwal;
}
} else if(suhu1.equals("Reamur")) {
if(suhu2.equals("Celcius")) {
suhuResult = suhuAwal * 5 / 4;
} else if(suhu2.equals("Kelvin")) {
suhuResult = suhuAwal * 5 / 4 + 273;
} else if(suhu2.equals("Fahrenheit")) {
suhuResult = suhuAwal * 9 / 4 + 32;
} else {
suhuResult = suhuAwal;
}
}
strSuhuAkhir = Double.toString(suhuResult);
resultTemp.setText(strSuhuAkhir);
}
});
}
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
// An item was selected. You can retrieve the selected item using
// parent.getItemAtPosition(pos)
}
public void onNothingSelected(AdapterView<?> parent) {
// Another interface callback
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_conversion, menu);
return true;
}
}
Ok, that's all for sharing today. Happy coding and go open source.
