我正在尝试制作一个小测验应用。不知怎的，我用一个错误的测验答案创建一个祝酒词有点麻烦。它没有正确更新全局变量。另外，我想知道如何仅使用实际错误的数字来更新变量。 Atm它显示例如＆＃34;出了点问题，检查问题nr。：3 4 3 4 3 4＆＃34;如果＆＃34;检查我的答案＆＃34;多次单击按钮。
我的activity_main看起来像这样：
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<TableLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:stretchColumns="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="220dp"
android:scaleType="centerCrop"
android:src="@drawable/two" />
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.android.gtaquizapp.MainActivity">
<TextView
style="@style/HeaderTextViewFormat"
android:text="@string/QuestionOne" />
<EditText
android:id="@+id/question_one_answer_box"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textCapWords"
android:isScrollContainer="true"
android:maxLength="16"
android:maxLines="1" />
<TextView
style="@style/HeaderTextViewFormat"
android:layout_marginTop="24dp"
android:text="@string/QuestionTwo" />
<RadioGroup
android:id="@+id/question_two_radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/activity_vertical_margin">
<RadioButton
android:id="@+id/question_two_radio_one"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerTwo_one" />
<RadioButton
android:id="@+id/question_two_radio_two"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerTwo_two" />
<RadioButton
android:id="@+id/question_two_radio_three"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerTwo_three" />
</RadioGroup>
<TextView
style="@style/HeaderTextViewFormat"
android:layout_marginTop="24dp"
android:text="@string/QuestionThree" />
<CheckBox
android:id="@+id/question_three_checkbox_one"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerThree_one" />
<CheckBox
android:id="@+id/question_three_checkbox_two"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerThree_two" />
<CheckBox
android:id="@+id/question_three_checkbox_three"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerThree_three" />
<CheckBox
android:id="@+id/question_three_checkbox_four"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerThree_four" />
<TextView
style="@style/HeaderTextViewFormat"
android:layout_marginTop="24dp"
android:text="@string/QuestionFour" />
<RadioGroup
android:id="@+id/question_four_radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/activity_vertical_margin">
<RadioButton
android:id="@+id/question_four_radio_one"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFour_one" />
<RadioButton
android:id="@+id/question_four_radio_two"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFour_two" />
<RadioButton
android:id="@+id/question_four_radio_three"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFour_three" />
<RadioButton
android:id="@+id/question_four_radio_four"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFour_four" />
</RadioGroup>
<TextView
style="@style/HeaderTextViewFormat"
android:layout_marginTop="24dp"
android:text="@string/QuestionFive" />
<RadioGroup
android:id = "@+id/question_five_radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/activity_vertical_margin">
<RadioButton
android:id="@+id/question_five_radio_two"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFive_two" />
<RadioButton
android:id="@+i`enter code here`d/question_five_radio_one"
style="@style/RadioAndCheckBoxStyle"
android:text="@string/AnswerFive_one" />
</RadioGroup>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="24dp"
android:onClick="checkAnswersMethod"
android:text="@string/CheckAnswersButtonText" />
</LinearLayout>
</TableLayout>
我的MainActivity看起来像这样：
package com.example.android.gtaquizapp;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.Toast;
import static com.example.android.gtaquizapp.R.id.question_four_radio_four;
import static com.example.android.gtaquizapp.R.id.question_four_radio_three;
import static com.example.android.gtaquizapp.R.id.question_two_radio_three;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/**
*Global variables are updated by the methods answerOne();, answerTwo(); answerThree(); answerFour(); answerFive();
*/
private boolean questionOne = false;
private boolean questionTwo = false;
private boolean questionThree = false;
private boolean questionFour = false;
private boolean questionFive = false;
private String checkedTextNotAllCorrect = "Something is wrong, check question nr.:";
/**
* This method is executed if the button "Check My Answers" is clicked.
* It creates a toast with the String checkedTextAllCorrect if all answers are correct or with checkedTextNotAllCorrect if something is wrong
*/
public void checkAnswersMethod(View v) {
String checkedTextAllCorrect = "Everything is correct, great job!";
answerOne();
answerTwo();
answerThree();
answerFour();
answerFive();
if (questionOne & questionTwo & questionThree & questionFour & questionFive) {
Toast.makeText(getApplicationContext(), checkedTextAllCorrect, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(), checkedTextNotAllCorrect, Toast.LENGTH_SHORT).show();
}
}
/**
* Updates the global variable questionOne if the answer was correct
* Updates the global variable checkedTextNotAllCorrect with the questions number if the answer was not correct
*/
public void answerOne() {
EditText questionOneAnswer = (EditText) findViewById(R.id.question_one_answer_box);
if (questionOneAnswer.getText().toString().equals("Grand Theft Auto")) {
questionOne = true;
} else {
checkedTextNotAllCorrect += " 1";
}
}
/**
* Updates the global variable questionTwo if the answer was correct
* Updates the global variable checkedTextNotAllCorrect with the questions number if the answer was not correct
*/
public void answerTwo() {
RadioGroup questionTwoRadioGroup = (RadioGroup) findViewById(R.id.question_two_radio_group);
int radioButtonID = questionTwoRadioGroup.getCheckedRadioButtonId();
switch (radioButtonID) {
case R.id.question_two_radio_one | question_two_radio_three:
checkedTextNotAllCorrect += " 2";
case R.id.question_two_radio_two:
questionTwo = true;
}
}
/**
* Updates the global variable questionThree if the answer was correct
* Updates the global variable checkedTextNotAllCorrect with the questions number if the answer was not correct
*/
public void answerThree() {
CheckBox checkBoxOne = (CheckBox) findViewById(R.id.question_three_checkbox_one);
CheckBox checkBoxTwo = (CheckBox) findViewById(R.id.question_three_checkbox_two);
CheckBox checkBoxThree = (CheckBox) findViewById(R.id.question_three_checkbox_three);
CheckBox checkBoxFour = (CheckBox) findViewById(R.id.question_three_checkbox_four);
if (checkBoxTwo.isChecked() & checkBoxThree.isChecked() & checkBoxFour.isChecked() & !checkBoxOne.isChecked()) {
questionThree = true;
} else {
checkedTextNotAllCorrect += " 3";
}
}
/**
* Updates the global variable questionFour if the answer was correct
* Updates the global variable checkedTextNotAllCorrect with the questions number if the answer was not correct
*/
public void answerFour() {
RadioGroup questionFourRadioGroup = (RadioGroup) findViewById(R.id.question_four_radio_group);
int radioButtonID = questionFourRadioGroup.getCheckedRadioButtonId();
switch (radioButtonID) {
case R.id.question_four_radio_one:
questionFour = true;
case R.id.question_four_radio_two | question_four_radio_three | question_four_radio_four:
checkedTextNotAllCorrect += " 4";
}
}
/**
* Updates the global variable questionFive if the answer was correct
* Updates the global variable checkedTextNotAllCorrect with the questions number if the answer was not correct
*/
public void answerFive() {
RadioGroup questionFiveRadioGroup = (RadioGroup) findViewById(R.id.question_five_radio_group);
int radioButtonID = questionFiveRadioGroup.getCheckedRadioButtonId();
switch (radioButtonID) {
case R.id.question_five_radio_one:
checkedTextNotAllCorrect += " 5";
case R.id.question_five_radio_two:
questionFive = true;
}
}
}
答案 0 :(得分：0)
对于方法answerTwo()，answerFour()和answerFive()，您使用的switch-case没有导致问题的break语句。
在每个break之后为切换添加case语句。请参阅下面的示例answerTwo()。
public void answerTwo() {
RadioGroup questionTwoRadioGroup = (RadioGroup) findViewById(R.id.question_two_radio_group);
int radioButtonID = questionTwoRadioGroup.getCheckedRadioButtonId();
switch (radioButtonID) {
case R.id.question_two_radio_one | question_two_radio_three:
checkedTextNotAllCorrect += " 2";
break;
case R.id.question_two_radio_two:
questionTwo = true;
break;
}
}
对使用switch-case的其他方法执行相同操作。