java - 2スピナー付コンバーター

Question

私はあなたの助けが必要です、これは本当に私を夢中にさせます、そして私は本当にそれに対する解決策を見つけることができないので、私が作成したいのはAndroid用のコンバーターアプリケーションですここに私のコードがあります

activity_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" >

<EditText
    android:id="@+id/input"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="Input Number Here"
    android:inputType="number" />

<Spinner
    android:id="@+id/spinner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Converts to:"
    android:textAppearance="?android:attr/textAppearanceMedium" />

<Spinner
    android:id="@+id/spinner2"
    android:layout_width="103dp"
    android:layout_height="wrap_content" />

<Button
    android:id="@+id/btnSubmit"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Convert" />

<EditText
    android:id="@+id/output"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="number" >

    <requestFocus />
</EditText>

MainActivity.java

    package com.example.test;

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {

private Spinner spinner1, spinner2;
private Button btnSubmit;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

addItemsOnSpinner2();
addListenerOnButton();
addListenerOnSpinnerItemSelection();
}

// add items into spinner dynamically
public void addItemsOnSpinner2() {

spinner1 = (Spinner) findViewById(R.id.spinner1);
List<String> list1 = new ArrayList<String>();
list1.add("Inches");
list1.add("Feet");
list1.add("Yard");
list1.add("Miles");
list1.add("Milimeter");
list1.add("Centimeter");
list1.add("Meter");
list1.add("Kilometer");
ArrayAdapter<String> dataAdapter1 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list1);
dataAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(dataAdapter1); 


spinner2 = (Spinner) findViewById(R.id.spinner2);
List<String> list2 = new ArrayList<String>();
list2.add("Inches");
list2.add("Feet");
list2.add("Yard");
list2.add("Miles");
list2.add("Milimeter");
list2.add("Centimeter");
list2.add("Meter");
list2.add("Kilometer");
ArrayAdapter<String> dataAdapter2 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list2);
dataAdapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(dataAdapter2);
}

public void addListenerOnSpinnerItemSelection() {
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner1.setOnItemSelectedListener(new CustomOnItemSelectedListener());
}

// get the selected dropdown list value
public void addListenerOnButton() {

spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner2 = (Spinner) findViewById(R.id.spinner2);
btnSubmit = (Button) findViewById(R.id.btnSubmit);

btnSubmit.setOnClickListener(new OnClickListener() {


if(selected1.equals("Inches"))
{
if (selected2.equals("Feet"))
{
//do calculation
}
else if (selected2.equals("unit"))
{
//do calculation
}
else if (selected2.equals("otherunit"))
{
//do calculation
}
else
{
//ERROR
}
}

if (selected1.equals("m"))
{
if (selected2.equals("Yard"))
{
//do calculation
}
else if (selected2.equals("unit"))
{
//do calculation
}
else if (selected2.equals("otherunit²"))
{
//do calculation
}
else
{
//ERROR
}
}
//repeat for all the possible units

} 

public void onClick(View v) {

Toast.makeText(MainActivity.this,
"OnClickListener : " + 
"\nSpinner 1 : "+ String.valueOf(spinner1.getSelectedItem()) + 
"\nSpinner 2 : "+ String.valueOf(spinner2.getSelectedItem()),
Toast.LENGTH_SHORT).show();
}


}