我正在开发我的第一个非常基本的Android应用程序。我已经做了一些基本的教程并设法启动并运行了一个基本的计算器，但我试图添加一个额外的无线电组，该应用程序不再工作。我一定做错了什么但不知道是什么！ 请告诉我任何提示，谢谢！ 这是我现在正在使用的完整java代码
package com.test.calculator;
import com.test.calculator.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class MainActivity extends Activity {
// Widgets
private EditText txtContainers;
private EditText txtVolume;
private EditText txtABV;
private EditText txtCost;
private RadioGroup rdoGroup1;
private RadioGroup rdoGroup2;
private Button btnCalculate;
private Button btnClear;
private TextView txtTotalVolume;
private TextView txtTotalAlcohol;
private TextView txtDrinkSize;
private TextView txtNumberofDrinks;
private TextView txtCostperDrink;
private int radioCheckedId = -1;
// Called on creation
@Override
public void onCreate(Bundle savedInstanceState) {
Eula.show(this);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txtContainers = (EditText) findViewById(R.id.txtContainers);
txtContainers.requestFocus();
rdoGroup1 = (RadioGroup) findViewById(R.id.RadioGroup1);
rdoGroup2 = (RadioGroup) findViewById(R.id.RadioGroup2);
txtVolume = (EditText) findViewById(R.id.txtVolume);
txtABV = (EditText) findViewById(R.id.txtABV);
txtCost = (EditText) findViewById(R.id.txtCost);
btnCalculate = (Button) findViewById(R.id.btnCalculate);
// disable calculate button
btnCalculate.setEnabled(false);
btnClear = (Button) findViewById(R.id.btnClear);
txtTotalVolume = (TextView) findViewById(R.id.txtTotalVolume);
txtTotalAlcohol = (TextView) findViewById(R.id.txtTotalAlcohol);
txtDrinkSize = (TextView) findViewById(R.id.txtDrinkSize);
txtNumberofDrinks = (TextView) findViewById(R.id.txtNumberofDrinks);
txtCostperDrink = (TextView) findViewById(R.id.txtCostperDrink);
/** Key listeners */
txtContainers.setOnKeyListener(mKeyListener);
txtVolume.setOnKeyListener(mKeyListener);
txtABV.setOnKeyListener(mKeyListener);
txtCost.setOnKeyListener(mKeyListener);
/** buttons */
btnCalculate.setOnClickListener(mClickListener);
btnClear.setOnClickListener(mClickListener);
// listener events
rdoGroup2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.radioOZ
|| checkedId == R.id.radioOZ) {
}
if (checkedId == R.id.radiomL
|| checkedId == R.id.radiomL) {
}
// Check selection
radioCheckedId = checkedId;
}
});
rdoGroup1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.radioPercent
|| checkedId == R.id.radioPercent) {
}
if (checkedId == R.id.radioProof
|| checkedId == R.id.radioProof) {
}
// Check selection
radioCheckedId = checkedId;
}
});
/** Key listeners */
txtContainers.setOnKeyListener(mKeyListener);
txtVolume.setOnKeyListener(mKeyListener);
txtABV.setOnKeyListener(mKeyListener);
txtCost.setOnKeyListener(mKeyListener);
/** buttons */
btnCalculate.setOnClickListener(mClickListener);
btnClear.setOnClickListener(mClickListener);
}
private OnKeyListener mKeyListener = new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
switch (v.getId()) {
case R.id.txtContainers:
case R.id.txtVolume:
case R.id.txtABV:
btnCalculate.setEnabled(txtVolume.getText().length() > 0
&& txtContainers.getText().length() > 0
&& txtCost.getText().length() > 0
&& txtABV.getText().length() > 0);
break;
case R.id.txtCost:
btnCalculate.setEnabled(txtVolume.getText().length() > 0
&& txtABV.getText().length() > 0
&& txtContainers.getText().length() > 0
&& txtCost.getText().length() > 0);
break;
}
return false;
}
};
// click listener actions
private OnClickListener mClickListener = new OnClickListener() {
public void onClick(View v) {
if (v.getId() == R.id.btnCalculate) {
calculate();
} else {
clear();
}
}
};
// calculation section
private void calculate() {
Double containers = Double.parseDouble(txtContainers.getText().toString());
Double volume = Double.parseDouble(txtVolume.getText().toString());
Double abv = Double.parseDouble(txtABV.getText().toString());
Double cost = Double.parseDouble(txtCost.getText().toString());
Double percentage = null;
Double volumeunit = null;
boolean isError = false;
if (radioCheckedId == -1) {
radioCheckedId = rdoGroup1.getCheckedRadioButtonId();
}
if (radioCheckedId == R.id.radioPercent) {
percentage = 1.00;
} else if (radioCheckedId == R.id.radioProof) {
percentage = 2.00;
}
if (radioCheckedId == -1) {
radioCheckedId = rdoGroup2.getCheckedRadioButtonId();
}
if (radioCheckedId == R.id.radioOZ) {
volumeunit = 1.00;
} else if (radioCheckedId == R.id.radiomL) {
volumeunit = 29.57;
}
/* specific calculations */
if (!isError) {
Double totalVolume = (containers * (volume/volumeunit));
int precision = 100; //keep 2 digits
totalVolume = Math.floor(totalVolume * precision +.5)/precision;
Double totalAlcohol = ((containers * (volume/volumeunit)) * ((abv/percentage) / 100));
totalAlcohol = Math.floor(totalAlcohol * precision +.5)/precision;
Double drinkSize = ((containers * (volume/volumeunit)) / ((containers * (volume/volumeunit)) * ((abv/percentage) / 100) / 0.6));
drinkSize = Math.floor(drinkSize * precision +.5)/precision;
Double numberofDrinks = ((containers * (volume/volumeunit)) * ((abv/percentage)/ 100) / 0.6);
numberofDrinks = Math.floor(numberofDrinks * precision +.5)/precision;
Double costperDrink = (cost / ((containers * (volume/volumeunit)) * ((abv/percentage)/ 100) / 0.6));
costperDrink = Math.floor(costperDrink * precision +.5)/precision;
txtTotalVolume.setText(totalVolume.toString());
txtTotalAlcohol.setText(totalAlcohol.toString());
txtDrinkSize.setText(drinkSize.toString());
txtNumberofDrinks.setText(numberofDrinks.toString());
txtCostperDrink.setText(costperDrink.toString());
}
}
// clear functions
private void clear() {
txtTotalVolume.setText("");
txtTotalAlcohol.setText("");
txtDrinkSize.setText("");
txtNumberofDrinks.setText("");
txtCostperDrink.setText("");
txtContainers.setText("1");
txtVolume.setText("0");
txtABV.setText("0");
txtCost.setText("0.00");
// set focus on the first field
txtVolume.requestFocus();
}
}