我在 Android 中遇到一个问题，我的按钮在片段中没有响应。这是 MainFragment.java 代码：
package com.example.currencyconverter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.DecimalFormat;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
public class MainFragment extends Fragment implements OnClickListener {
ProgressDialog progressBar;
EditText edittextdollars;
EditText edittexteuros;
TextView dollars;
TextView euros;
RadioButton dtoe;
RadioButton etod;
RadioGroup radiogroup;
Spinner spinner1;
Spinner spinner2;
Button calculate;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_main, container, false);
}
private void addListenerOnButton() {
spinner1 = (Spinner)getView().findViewById(R.id.spinner1);
spinner2 = (Spinner)getView().findViewById(R.id.spinner2);
calculate = (Button)getView().findViewById(R.id.calculate);
edittextdollars = (EditText)getView().findViewById(R.id.edittextdollars);
edittexteuros = (EditText)getView().findViewById(R.id.edittexteuros);
calculate.setOnClickListener(myhandler1);
}
public interface CurrencyConverter {
public double convert(String currencyFrom, String currencyTo) throws Exception;
}
public class YahooCurrencyConverter implements CurrencyConverter{
public double convert(String currencyFrom, String currencyTo) throws IOException {
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("http://quote.yahoo.com/d/quotes.csv?s=" + currencyFrom + currencyTo + "=X&f=l1&e=.csv");
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpGet, responseHandler);
httpclient.getConnectionManager().shutdown();
return Double.parseDouble(responseBody);
}
}
View.OnClickListener myhandler1 = new View.OnClickListener() {
public void onClick(View v) {
String text1 = spinner1.getSelectedItem().toString().trim();
String text2 = spinner2.getSelectedItem().toString().trim();
if (text1.equals("US Dollar - USD") && text2.equals("Euro - EUR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("USD", "EUR");
}
if (text1.equals("US Dollar - USD") && text2.equals("Euro - EUR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("EUR","USD");
}
if (text1.equals("Euro - EUR") && text2.equals("US Dollar - USD") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("EUR","USD");
}
if (text1.equals("Euro - EUR") && text2.equals("US Dollar - USD") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("USD","EUR");
}
if (text1.equals("Euro - EUR") && text2.equals("Euro - EUR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertEurostoEuros();
}
if (text1.equals("Euro - EUR") && text2.equals("Euro - EUR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
OppositeOfConvertEurostoEuros();
}
if (text1.equals("US Dollar - USD") && text2.equals("US Dollar - USD") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertDollarstoDollars();
}
if (text1.equals("US Dollar - USD") && text2.equals("US Dollar - USD") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
OppositeOfConvertDollarstoDollars();
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Indian Rupee - INR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertEurostoEuros();
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Indian Rupee - INR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
OppositeOfConvertDollarstoDollars();
}
if (text1.equals("Indian Rupee - INR") && text2.equals("US Dollar - USD") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("INR","USD");
}
if (text1.equals("Indian Rupee - INR") && text2.equals("US Dollar - USD") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("USD","INR");
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Euro - EUR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("INR","EUR");
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Euro - EUR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("EUR","INR");
}
if (text1.equals("US Dollar - USD") && text2.equals("Indian Rupee - INR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("USD","INR");
}
if (text1.equals("US Dollar - USD") && text2.equals("Indian Rupee - INR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("INR","USD");
}
if (text1.equals("Euro - EUR") && text2.equals("Indian Rupee - INR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("INR","EUR");
}
if (text1.equals("Euro - EUR") && text2.equals("Indian Rupee - INR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("EUR","INR");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Japanese Yen - JPY") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("JPY","JPY");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Japanese Yen - JPY") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("JPY","JPY");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("US Dollar - USD") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("JPY","USD");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("US Dollar - USD") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("USD","JPY");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Indian Rupee - INR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("JPY","INR");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Indian Rupee - INR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("INR","JPY");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Euro - EUR") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("JPY","EUR");
}
if (text1.equals("Japanese Yen - JPY") && text2.equals("Euro - EUR") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("EUR","JPY");
}
if (text1.equals("US Dollar - USD") && text2.equals("Japanese Yen - JPY") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("USD","JPY");
}
if (text1.equals("US Dollar - USD") && text2.equals("Japanese Yen - JPY") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("JPY","USD");
}
if (text1.equals("Euro - EUR") && text2.equals("Japanese Yen - JPY") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("EUR","JPY");
}
if (text1.equals("Euro - EUR") && text2.equals("Japanese Yen - JPY") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("JPY","EUR");
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Japanese Yen - JPY") && edittextdollars.length() > 0 && edittexteuros.length()==0) {
convertvalues("INR","JPY");
}
if (text1.equals("Indian Rupee - INR") && text2.equals("Japanese Yen - JPY") && edittexteuros.length() > 0 && edittextdollars.length()==0) {
convertvalues2("JPY","INR");
}
else {
System.out.println("");
}
}
public String convertvalues(String convertfrom, String convertto) {
double current;
double val = Double.parseDouble(edittextdollars.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
YahooCurrencyConverter ycc = new YahooCurrencyConverter();
try {
current = ycc.convert(convertfrom, convertto);
edittexteuros.setText(df.format(val*current));
return "passed";
}
catch (Exception e) {
StringWriter errors = new StringWriter();
e.printStackTrace(new PrintWriter(errors));
return errors.toString();
}
}
public String convertvalues2(String convertfrom2, String convertto2) {
double current;
double val = Double.parseDouble(edittexteuros.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
YahooCurrencyConverter ycc = new YahooCurrencyConverter();
try {
current = ycc.convert(convertfrom2, convertto2);
edittextdollars.setText(df.format(val*current));
return "passed";
}
catch (Exception e) {
StringWriter errors = new StringWriter();
e.printStackTrace(new PrintWriter(errors));
return errors.toString();
}
}
protected void convertEurostoDollars() {
double val = Double.parseDouble(edittexteuros.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittextdollars.setText(df.format(val*1.33));
}
protected void convertEurostoEuros() {
double val = Double.parseDouble(edittextdollars.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittexteuros.setText(df.format(val*1));
}
protected void convertDollarstoDollars() {
double val = Double.parseDouble(edittextdollars.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittexteuros.setText(df.format(val*1));
}
protected void OppositeOfConvertEurostoDollars() {
double val = Double.parseDouble(edittextdollars.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittexteuros.setText(df.format(val*1.33));
}
protected void OppositeOfConvertDollarstoEuros() {
double val = Double.parseDouble(edittexteuros.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittextdollars.setText(df.format(val*0.75));
}
protected void OppositeOfConvertEurostoEuros() {
double val = Double.parseDouble(edittexteuros.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittextdollars.setText(df.format(val*1));
}
protected void OppositeOfConvertDollarstoDollars() {
double val = Double.parseDouble(edittexteuros.getText().toString());
DecimalFormat df = new DecimalFormat(".##");
edittextdollars.setText(df.format(val*1));
}
};
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
这是我的按钮的 xml 部分：
<Button
android:id="@+id/calculate"
android:layout_width="320dp"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/edittexteuros"
android:text="@string/calculate" />
这里发生了什么？我的 LogCat 没有显示错误。任何帮助是极大的赞赏。