I want to highlight right and wrong option when user clicks a button after checking an radio button. If that option is right, highlight. Else highlight right option.
Is there any way to get radio button id in a group based on its value? Or Do I need to use switch case?
I searched enough but not able to find out what I need.
Edit
I have simple layout which contains one question, 4 choices, one button. User check a radio button and click the check button. If user selects wrong option, highlight the correct option. I know what is correct option by value.
choice1, choice2, choice3, choice4 are four radio buttons. User checks choice3. But choice2 is correct. How do I select choice2 by value in this radio group.
group.getRadioButtonId("choice2")
Anything similar to this?
You could iterate through the children of your RadioGroup to get the required one:
int count = radioGroup.getChildCount();
for (int i = 0 ; i < count; i++) {
RadioButton button = (RadioButton) radioGroup.getChildAt(i);
if (button.getText().equals("choice2")) {
int id = button.getId(); // the ID you're looking for
}
}
You Can check like this
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
int rbId = group.getCheckedRadioButtonId();
RadioButton rb = (RadioButton) findViewById(rbId);
switch (group.getId()) {
case R.id.radiogroupID:
if (rb.getText().toString().equalsIgnoreCase("right")) {
// your logic
} else {
//your logic
}
}
}
you can use these line. its working for me
int checkedId = radioGroup.getCheckedRadioButtonId();
View radioButton = radioGroup.findViewById(checkedId);
int radioId = radioGroup.indexOfChild(radioButton);
RadioButton btn = (RadioButton) radioGroup.getChildAt(radioId);
First check which option is true. hear choice 2 OK. set by default is checked true and than check user checked value . if user select other option than display message and pass true option we already checked true
Create an int array with all the ids of the radiobutton
int[] rb_IDs=new int[]{R.id.rb1,R.id.rb2,R.id.rb3};
Then inside your button click :
RadioGroup rg=(RadioGroup) findViewById(R.id.rg);
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
for (int i=0;i<rb_IDs.length;i++)
{
RadioButton rb=(RadioButton)findViewById(rb_IDs[i]);
if (rb.getText().toString().equals("YOUR CORRECT ANSWER")&&!rb.isChecked())
{
//
//Do your thing
//
//ID of the correct answer Radiobutton is
int id=rb_IDs[i];
//HighLighting the answer
rb.setBackgroundColor(Color.parseColor("#00ff00"));
break;
}
}
}
});
Related
I want to access the RadioButton from the RadioGroup,
int selectedId = radioFeeGroup.getCheckedRadioButtonId();
radioFeeButton = (RadioButton) findViewById(selectedId);
I am getting selectedId value -1. That's why application get crashed.
Make Sure you are selecting at least one Radio button from the group.
See the Document
Your code is correct,
int selectedId = radioFeeGroup.getCheckedRadioButtonId();
radioFeeButton = (RadioButton) findViewById(selectedId);
If you are already selecting the RadioButton then clean the project & Rebuild it again it should work if you are accessing RadioGroup correctly from xml.
Check this
radioFeeGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
int radioButtonID = radioFeeGroup.getCheckedRadioButtonId();
View radioButton = radioFeeGroup.findViewById(radioButtonID);
int position = group.indexOfChild(radioButton);
}
});
Check this examples
How to get the id of selected radio button in android?
How to get id of selected radio button in a radio group
I am making an application that has list and Radio Buttons. My Layout contains of the following : a list , A button .
The List contains of Radio buttons. Two radio Buttons. After checking the buttons. I want to make a loop that reads the values of how many are in Button one and how many in Button Two.
This is how I have done so far.
ListViewStudentEditAbsence country ;
for(int i=0;i<listViewStudentNames.size();i++) {
country = listViewStudentNames.get(i);
if (country.getAbsence()==1) {
Absence[i] = "1";
} else {
Absence[i] ="0";
}
}
But It doesn't seem to work.
In your CustomAdapter getView() method
int value=0; //globally
RadioGroup radioGroup = (RadioGroup) convertView.findViewById(R.id.yourRadioGroup);
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
if (checkedId == R.id.rbutton1) {
value=10; //a's value
} else if (checkedId == R.id.rbutton2) {
value=20; //b's value
}
}
});
https://stackoverflow.com/questions/11194515/android-get-value-of-the-selected-radio-button
Android getting value from selected radiobutton
Hope it works. This two links give you proper knowledge about fetching value.
I have an application form with one radio group that consists of two radio buttons (self delivery and company delivery). While inserting the details everything is working fine and I can get the text of radio button selected by the code below:
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// TODO Auto-generated method stub
selectedId = radioGroup.getCheckedRadioButtonId();
// find the radiobutton by returned id
radioButton = (RadioButton) findViewById(selectedId);
if (radioButton.isChecked()) {
OPTIONS=radioButton.getText().toString();
if (OPTIONS.equals("SelfDelivery")) {
deliveryAddress.setVisibility(View.GONE);
deliveryEdit.setVisibility(View.GONE);
} else {
deliveryAddress.setVisibility(View.VISIBLE);
deliveryEdit.setVisibility(View.VISIBLE);
}
}
}
});
When I press the edit button and go to edit page, I want the radio button to also be selected according to the user.
For example: If the user is selecting the company delivery (in the edit page the company delivery should be selected in the radio group).
I do not know how to get the selected id and make the radio group to be selected in the edit page.
// try this
// on edit try this way
RadioButton radioButtonSelf;
RadioButton radioButtonCompany;
radioButtonSelf = (RadioButton) findViewById(R.id.selfradiobuttonid);
radioButtonCompany = (RadioButton) findViewById(R.id.radioButtonCompany);
if(OPTIONS.equals("SelfDelivery")){
radioButtonSelf.setChecked(true);
radioButtonCompany.setChecked(false);
}else{
radioButtonCompany.setChecked(true);
radioButtonSelf.setChecked(false);
}
I need help from any one..
I'm facing difficult in checks the radio button.
My concept is how to save the radio button in arraylist and again how to check the selected value from arraylist. If suppose imagine a quiz app. I have a set of questions and answers in a separate array. I'm displaying it.Its fine. Now if i came to pervious question i should check the selected answer already which has stored in an arraylist. Likewise for next question. How to implement this? I feel difficult in this.
When 1st question displays i check and get the answer like this..
btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener(){
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton radioButton = (RadioButton)group. findViewById(checkedId);
String temp = radioButton.getText().toString();
When i press next button for next question like do like this same and get the answer in a string and while i press previous i have used same like that.. but i should not do like that instead i should check already choosen answer..
Sorry for my bad english. Thanks a lot in Advance..
radioGroup = (RadioGroup) findViewById(R.id.rdbGp1);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override public void onCheckedChanged(RadioGroup group, int checkedId) { // TODO Auto-generated method stub for(int i=0; i
RadioButton btn = (RadioButton) radioGroup.getChildAt(i);
String text;
if (btn.isPressed() && btn.isChecked() && questNo < 5)
{
Log.e("corrAns[questNo]",corrAns[questNo]);
if (corrAns[questNo].equals(btn.getText()) && flag==true)
{
score++;
flag=false;
checked = true;
}
else if(checked==true)
{
score--;
flag=true;
checked = false;
}
}
} tvScore.setText("Score: " + Integer.toString(score) + "/5"); Log.e("Score:", Integer.toString(score)); } });
this is the snippet you can go ahead and modify according to your need...
i hope this will help
also check this link
I don't know about your implementation, but I would have a class called Question, for example, that would contain the question, the answers in an array, the right answer (just the id of the array) and the selected answer (just the id of the array).
So, in your program you will have a set of Question objects and you will have the option selected and then you can just put radioButton.toggle();
Use HashMap<RadioGroup,Integer> hashMap to store the value inside the
btn_practicerg.setOnCheckedChangeListener(new OnCheckedChangeListener(){
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton radioButton = (RadioButton)group. findViewById(checkedId);
String temp = radioButton.getText().toString();
hashMap.put(group,checkedId);
later you can retrieve the value of RadioGroup in hashmap just pass the object of RadioGroup to the HashMap as key. eg
RadioGroup mOption = (RadioGroup) findViewById(R.id.option);
mOption.check(hashMap.get(mOpiton));
I have two RadioButtons inside a RadioGroup. I want to set OnClickListener on those RadioButtons. Depending on which RadioButton is clicked, I want to change the text of an EditText. How can I achieve this?
I'd think a better way is to use RadioGroup and set the listener on this to change and update the View accordingly (saves you having 2 or 3 or 4 etc listeners).
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup);
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
}
});
Hope this will help you...
RadioButton rb = (RadioButton) findViewById(R.id.yourFirstRadioButton);
rb.setOnClickListener(first_radio_listener);
and
OnClickListener first_radio_listener = new OnClickListener (){
public void onClick(View v) {
//Your Implementaions...
}
};
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener()
{
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
RadioButton rb=(RadioButton)findViewById(checkedId);
textViewChoice.setText("You Selected " + rb.getText());
//Toast.makeText(getApplicationContext(), rb.getText(), Toast.LENGTH_SHORT).show();
}
});
The question was about Detecting which radio button is clicked, this is how you can get which button is clicked
final RadioGroup radio = (RadioGroup) dialog.findViewById(R.id.radioGroup1);
radio.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
View radioButton = radio.findViewById(checkedId);
int index = radio.indexOfChild(radioButton);
// Add logic here
switch (index) {
case 0: // first button
Toast.makeText(getApplicationContext(), "Selected button number " + index, 500).show();
break;
case 1: // secondbutton
Toast.makeText(getApplicationContext(), "Selected button number " + index, 500).show();
break;
}
}
});
For Kotlin Here is added the lambda expression and Optimized the Code.
radioGroup.setOnCheckedChangeListener { radioGroup, optionId ->
run {
when (optionId) {
R.id.radioButton1 -> {
// do something when radio button 1 is selected
}
R.id.radioButton2 -> {
// do something when radio button 2 is selected
}
// add more cases here to handle other buttons in the your RadioGroup
}
}
}
Hope this will help you. Thanks!
You could also add listener from XML layout: android:onClick="onRadioButtonClicked" in your <RadioButton/> tag.
<RadioButton android:id="#+id/radio_pirates"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/pirates"
android:onClick="onRadioButtonClicked"/>
See Android developer SDK- Radio Buttons for details.
Since this question isn't specific to Java, I would like to add how you can do it in Kotlin:
radio_group_id.setOnCheckedChangeListener({ radioGroup, optionId -> {
when (optionId) {
R.id.radio_button_1 -> {
// do something when radio button 1 is selected
}
// add more cases here to handle other buttons in the RadioGroup
}
}
})
Here radio_group_id is the assigned android:id of the concerned RadioGroup. To use it this way you would need to import kotlinx.android.synthetic.main.your_layout_name.* in your activity's Kotlin file. Also note that in case the radioGroup lambda parameter is unused, it can be replaced with _ (an underscore) since Kotlin 1.1.
Just in case someone else was struggeling with the accepted answer:
There are different OnCheckedChangeListener-Interfaces. I added to first one to see if a CheckBox was changed.
import android.widget.CompoundButton.OnCheckedChangeListener;
vs
import android.widget.RadioGroup.OnCheckedChangeListener;
When adding the snippet from Ricky I had errors:
The method setOnCheckedChangeListener(RadioGroup.OnCheckedChangeListener) in the type RadioGroup is not applicable for the arguments (new CompoundButton.OnCheckedChangeListener(){})
Can be fixed with answer from Ali :
new RadioGroup.OnCheckedChangeListener()
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup);
radioGroup.setOnClickListener(v -> {
// get selected radio button from radioGroup
int selectedId = radioGroup.getCheckedRadioButtonId();
// find the radiobutton by returned id
radioButton = findViewById(selectedId);
String slectedValue=radioButton.getText()
});