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- package com.example.currencyconverter;
- import android.os.Bundle;
- import android.view.Menu;
- import android.view.MenuItem;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemSelectedListener;
- import android.widget.ArrayAdapter;
- import android.widget.Spinner;
- import android.widget.TextView;
- import android.app.Activity;
- public class MainActivity extends Activity {
- private String [] currency_name;
- private ArrayAdapter<String> adapter;
- private Spinner spin1, spin2;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- setUpTheSpinners();
- }
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
- getMenuInflater().inflate(R.menu.activity_main, menu);
- return true;
- }
- private void setUpTheSpinners() {
- currency_name = getResources().getStringArray(R.array.currency_name);
- adapter= new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, currency_name);
- adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
- OnItemSelectedListener listener = new CurrencySelectedListener();
- spin1 = (Spinner)findViewById(R.id.spinner1);
- spin1.setAdapter(adapter);
- spin1.setOnItemSelectedListener(listener);
- spin2 = (Spinner)findViewById(R.id.spinner2);
- spin2.setAdapter(adapter);
- spin2.setOnItemSelectedListener(listener);
- }
- private void calculateSum() {
- String [] rates = getResources().getStringArray(R.array.currency_rate);
- int index1 = spin1.getSelectedItemPosition();
- int index2 = spin2.getSelectedItemPosition();
- double rate1 = Double.parseDouble( rates[index1] );
- double rate2 = Double.parseDouble( rates[index2] );
- double totalRate = rate1 + rate2;
- TextView totalRateText = (TextView)findViewById(R.id.textView4);
- totalRateText.setText("" + totalRate);
- }
- private class CurrencySelectedListener implements OnItemSelectedListener {
- public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
- calculateSum();
- }
- public void onNothingSelected(AdapterView<?> parent) {
- }
- }
- }
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