我是初学Android开发者 我使用单选按钮组进行测验应用我需要计算正确和错误的答案 但它会计算每个我选中的单选按钮。我不知道怎么 ？。
public class MainActivity extends AppCompatActivity {
/**
* Global Variable for count Correct answer
*/
int count_correct_answer =0;
/**
* Global Variable for count worng answer
*/
int count_wrong_answer=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void rdaio_click_group1(View view) {
RadioGroup radio=(RadioGroup) findViewById(R.id.radio_group1);
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
// Check which radio button was clicked
switch(view.getId()) {
case R.id.radio_button1:
if (checked)
break;
case R.id.radio_button2:
if (checked)
count_correct_answer++;
radio.clearCheck();
break;
case R.id.radio_button3 :
if(checked)
break;
}
}
public void rdaio_click_group2(View view) {
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
// Check which radio button was clicked
switch(view.getId()) {
case R.id.radio_button12:
if (checked)
count_correct_answer++;
break;
case R.id.radio_button22:
if (checked)
break;
case R.id.radio_button32 :
if(checked)
break;
}
}
答案 0 :(得分：0)
创建一个按钮以确定答案并控制下一个问题（错误或正确答案）。
此按钮需要调用onClickListener。
答案 1 :(得分：0)
全球宣布：
RadioGroup radio;
on onCreate：
radio = (RadioGroup) findViewById(R.id.radio_group1);
在onClick或任何动作事件中：
radioButtonID = radio.getCheckedRadioButtonId();
View radioButton = radio.findViewById(radioButtonID);
if(radioButton.getId() == R.id.radio_button12){
count_correct_answer++;
}
else{
count_wrong_answer++;
}
据我所知，你想重置radioButton选择。所以，我添加了这些代码来重置radioGroups和count_correct_answer，count_wrong_answer：
在submit_answer(View view)显示成功/失败的敬酒后添加以下代码：
radio_groub1_button.clearCheck();
radio_groub2_button.clearCheck();
.
.
.
radio_groub8_button.clearCheck();
count_correct_answer = 0;
count_wrong_answer = 0;
希望这有帮助。
答案 2 :(得分：0)
您提供的代码中存在多个问题。
首先，首先检查您在xml中用于onClick方法的拼写。您已定义public void *rdaio_click_group<number>*， ，只需确保在xml和java中拼写相同。
其次，您应该始终在onCreate方法或片段的onCreateView方法中初始化视图和内容。因此，在onCreate之外声明RadioGroup radioGroup;以使其成为全局变量，然后在onCreate中输入
radioGroup = (RadioGroup) findViewById(R.id.radio_group1);
在switch部分中，您自己和应用程序对于您想要做什么感到困惑。在
switch(view.getId()) {
case R.id.radio_button1:
if (checked)
break;
......
}
此时，应用程序知道如果view.getId()的计算结果为true，则应该尝试if条件，然后，仅当布尔值checked求值为true时，switch语句应该会中断。
如果在之后没有括号（ Android工作室不允许这样做，如果您不想对if条件执行任何操作，请不要使用它或在其后面放置空括号，以便Android Studio知道您不想做任何事情条件为真，你必须总是为每个 它将继续尝试下一个案例，直到它到达{}括号），切换条件和循环，那么编译器将假定所有代码直到下一个＆＃39 ;;＆＃39; （分号）是您想要包括在括号中而不是其他内容。现在，你在if条件之后留下了一个空行，可能是说当这个条件成立时你不想发生任何事情，编译器也不知道这一点。因此，默认情况下，它包含break条件中的if语句，这是因为if条件之后的下一个分号包含break语句。 / p>
case都有一个break语句，而你的break语句只对那些条件计算为true时的实例，当条件为假时app应该做什么？ default，现在如果以前尝试过的案例中的任何一个评估为true并且具有可到达的break语句，然后，应用程序将执行两个案例（原始案件和新案件）要求执行的所有任务。否则，应用程序将简单地实现default情况并产生错误的输出。
答案 3 :(得分：0)
/**
* declare object variable for each groupe button
*/
RadioGroup radio_groub1_button,radio_groub2_button, radio_groub3_button , radio_groub4_button;
RadioGroup radio_groub5_button , radio_groub6_button ,radio_groub7_button , radio_groub8_button ;
/**
* Global Variable for count Correct answer
*/
int count_correct_answer = 0; / ** *全局变量计数回答 * / int count_wrong_answer = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/**
* find ID for group button 1 to group button 8
*/
radio_groub1_button = (RadioGroup)findViewById(R.id.radio_group1) ;
radio_groub2_button = (RadioGroup)findViewById(R.id.radio_group2) ;
radio_groub3_button = (RadioGroup)findViewById(R.id.radio_group3) ;
radio_groub4_button = (RadioGroup)findViewById(R.id.radio_group4) ;
radio_groub5_button = (RadioGroup)findViewById(R.id.radio_group5) ;
radio_groub6_button = (RadioGroup)findViewById(R.id.radio_group6) ;
radio_groub7_button = (RadioGroup)findViewById(R.id.radio_group7) ;
radio_groub8_button = (RadioGroup)findViewById(R.id.radio_group8) ;
}
public void submit_answer(View view){
int selectteed1 = radio_groub1_button.getCheckedRadioButtonId();
RadioButton radio_button1 = (RadioButton)findViewById(selectteed1);
String button1= radio_button1.getText().toString();
/**
* get id of correct answer and store in variable.
*/
int button_g1= R.id.radio_button2;
if(selectteed1 == button_g1) {
// Toast.makeText(getBaseContext(),"Yes", Toast.LENGTH_LONG).show();
count_correct_answer++;
} else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
* */
int selectteed2 = radio_groub2_button.getCheckedRadioButtonId();
RadioButton radio_button2 = (RadioButton)findViewById(selectteed2);
String button2 =radio_button2.getText().toString();
/**
* get id of correct answer and store in variable.
*/
int button_g2= R.id.radio_button12;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed2== button_g2) {
count_correct_answer++;
}
else {count_wrong_answer++;}
int selectteed3 = radio_groub3_button.getCheckedRadioButtonId();
RadioButton radio_button3 = (RadioButton)findViewById(selectteed3);
String button3 = radio_button3.getText().toString();
/**
* get id of correct answer and store in variable.
*/
int button_g3= R.id.radio_button33;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed3== button_g3) {
count_correct_answer++;
} else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
*/
int selectteed4 = radio_groub4_button.getCheckedRadioButtonId();
RadioButton radio_button4 = (RadioButton)findViewById(selectteed4);
/**
* get id of correct answer and store in variable.
*/
int button_g4= R.id.radio_button14;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed4== button_g4) {
count_correct_answer++;
}
else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
*/
int selectteed5 = radio_groub5_button.getCheckedRadioButtonId();
RadioButton radio_button5 = (RadioButton)findViewById(selectteed5);
/**
* get id of correct answer and store in variable.
*/
int button_g5= R.id.radio_button25;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed5== button_g5) {
count_correct_answer++;
}
else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
*/
int selectteed6 = radio_groub6_button.getCheckedRadioButtonId();
RadioButton radio_button6 = (RadioButton)findViewById(selectteed6);
/**
* get id of correct answer and store in variable.
*/
int button_g6= R.id.radio_button26;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed6== button_g6) {
count_correct_answer++;
}
else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
*/
int selectteed7 = radio_groub7_button.getCheckedRadioButtonId();
RadioButton radio_button7 = (RadioButton)findViewById(selectteed7);
/**
* get id of correct answer and store in variable.
*/
int button_g7= R.id.radio_button27;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed7== button_g7) {
count_correct_answer++;
}
else {count_wrong_answer++;}
/**
* cheked radio button that selectted in group1 and get id .
*/
int selectteed8 = radio_groub8_button.getCheckedRadioButtonId();
RadioButton radio_button8 = (RadioButton)findViewById(selectteed8);
/**
* get id of correct answer and store in variable.
*/
int button_g8= R.id.radio_button28;
/**
* check for correct answer , wrong and count it .
*/
if(selectteed8== button_g8) {
count_correct_answer++;
}
else {count_wrong_answer++;}
String succeed = "Number of correct answer is \t "+ count_correct_answer + "\n you are done";
String faild = "Number of wrong answer is \t "+ count_wrong_answer + "\n you are faild";
if(count_correct_answer >= count_wrong_answer){
Toast.makeText(getBaseContext(),succeed, Toast.LENGTH_LONG).show();
}
else{Toast.makeText(getBaseContext(),faild, Toast.LENGTH_LONG).show();}
}
XML
<LinearLayout
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/Q_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q1" />
<RadioGroup
android:id="@+id/radio_group1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button1" />
<RadioButton
android:id="@+id/radio_button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button2" />
<RadioButton
android:id="@+id/radio_button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button3" />
</RadioGroup>
<TextView
android:id="@+id/Q_2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q2" />
<RadioGroup
android:id="@+id/radio_group2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button12" />
<RadioButton
android:id="@+id/radio_button22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button22" />
<RadioButton
android:id="@+id/radio_button32"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button32" />
</RadioGroup>
<TextView
android:id="@+id/Q_3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q3" />
<RadioGroup
android:id="@+id/radio_group3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button13" />
<RadioButton
android:id="@+id/radio_button23"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button23" />
<RadioButton
android:id="@+id/radio_button33"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button33" />
</RadioGroup>
<TextView
android:id="@+id/Q_4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q4" />
<RadioGroup
android:id="@+id/radio_group4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button14"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button14" />
<RadioButton
android:id="@+id/radio_button24"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button24" />
<RadioButton
android:id="@+id/radio_button34"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button34" />
</RadioGroup>
<TextView
android:id="@+id/Q_5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q5" />
<RadioGroup
android:id="@+id/radio_group5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button15"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button15" />
<RadioButton
android:id="@+id/radio_button25"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button25" />
<RadioButton
android:id="@+id/radio_button35"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button35" />
</RadioGroup>
<TextView
android:id="@+id/Q_6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q6" />
<RadioGroup
android:id="@+id/radio_group6"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button16"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button16" />
<RadioButton
android:id="@+id/radio_button26"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button26" />
<RadioButton
android:id="@+id/radio_button36"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button36" />
</RadioGroup>
<TextView
android:id="@+id/Q_7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q7" />
<RadioGroup
android:id="@+id/radio_group7"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button17"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button17" />
<RadioButton
android:id="@+id/radio_button27"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button27" />
<RadioButton
android:id="@+id/radio_button37"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button37" />
</RadioGroup>
<TextView
android:id="@+id/Q_8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:text="@string/Q8" />
<RadioGroup
android:id="@+id/radio_group8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="@+id/radio_button18"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button18" />
<RadioButton
android:id="@+id/radio_button28"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button28" />
<RadioButton
android:id="@+id/radio_button38"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/button38" />
</RadioGroup>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:layout_gravity="center_horizontal"
android:onClick="submit_answer"
android:text="@string/submit"/>
<TextView
android:id="@+id/show_answer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp"
android:layout_marginTop="12dp"
android:padding="23dp"
android:text="" />`enter code here`