I have a RadioGroup and I want to align buttons next to each other in two columns and five rows and I am unable to achieve it. Things I have tried:
RelativeLayout-> OutsideRadioGroup-> InsideRadioGroup. AllRadioButtonsare selected, but I want only one to be selected.RadioGroup: orientation- Span, stretchcolumns
TableRowTableLayout
Please let me know how create one RadioGroup and have two columns and many RadioButtons within.
You can simulate that RadioGroup to make it look like you have only one. For example you have rg1 and rg2(RadioGroups with orientation set to vertical(the two columns)). To setup those RadioGroups:
rg1 = (RadioGroup) findViewById(R.id.radioGroup1);
rg2 = (RadioGroup) findViewById(R.id.radioGroup2);
rg1.clearCheck(); // this is so we can start fresh, with no selection on both RadioGroups
rg2.clearCheck();
rg1.setOnCheckedChangeListener(listener1);
rg2.setOnCheckedChangeListener(listener2);
To select only one RadioButton in those RadioGroups the listeners above will be:
private OnCheckedChangeListener listener1 = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId != -1) {
rg2.setOnCheckedChangeListener(null); // remove the listener before clearing so we don't throw that stackoverflow exception(like Vladimir Volodin pointed out)
rg2.clearCheck(); // clear the second RadioGroup!
rg2.setOnCheckedChangeListener(listener2); //reset the listener
Log.e("XXX2", "do the work");
}
}
};
private OnCheckedChangeListener listener2 = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId != -1) {
rg1.setOnCheckedChangeListener(null);
rg1.clearCheck();
rg1.setOnCheckedChangeListener(listener1);
Log.e("XXX2", "do the work");
}
}
};
To get the checked RadioButton from the RadioGroups you could do:
int chkId1 = rg1.getCheckedRadioButtonId();
int chkId2 = rg2.getCheckedRadioButtonId();
int realCheck = chkId1 == -1 ? chkId2 : chkId1;
If you use the check() method of the RadioGroup you have to remember to call clearCheck() on the other Radiogroup.
Changwei Yao
The RadioGroup is extended from LinearLayout.
the linearlayout can not do it, so RadioGroup can not do it.
Why not implement it self.
Use RelativeLayout to layout the child view. And record the state of the child view. use setLevel to control the states.
Good luck for you!.
Make 2 RadioGroup in the xml file using LinearLayout each having 5 RadioButton and using layout_weight property place them side by side on the screen. Then create listener for these radio groups as shown below:
rg1 = (RadioGroup) findViewById(R.id.radiogroup1);
rg2 = (RadioGroup) findViewById(R.id.radiogroup2);
rg1.clearCheck();//this is so we can start fresh, with no selection on both RadioGroups
rg2.clearCheck();
rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if (checkedId != -1) {
fun2();
}
}
});
rg2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if (checkedId != -1) {
fun1();
}
}
});
And fun1() & fun2() will be defined as shown below:
public void fun1() {
rg1.setOnCheckedChangeListener(null);
rg1.clearCheck();
rg1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
fun2();
Log.v("Inside fun1","fun2");
}
});
}
public void fun2() {
rg2.setOnCheckedChangeListener(null);
rg2.clearCheck();
rg2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
fun1();
Log.v("Inside fun2","fun1");
}
});
}
I had to do the same thing and wound up combining a TableLayout and a RadioButtonGroup. I added the radio buttons dynamically to TableRows. Here is the class:
public class RadioGroupColumns extends TableLayout implements OnClickListener {
private static final String TAG = "RadioGroupColumns";
private RadioButton activeRadioButton;
private int mCheckedId = -1;
// tracks children radio buttons checked state
private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
// when true, mOnCheckedChangeListener discards events
private boolean mProtectFromCheckedChange = false;
private OnCheckedChangeListener mOnCheckedChangeListener;
private PassThroughHierarchyChangeListener mPassThroughListener;
public RadioGroupColumns(Context context) {
super(context);
setOrientation(VERTICAL);
init();
}
public RadioGroupColumns(Context context, AttributeSet attrs) {
super(context, attrs);
Resources res = Resources.getSystem();
int value = 0;
// retrieve selected radio button as requested by the user in the
// XML layout file
TypedArray attributes = null;
try {
attributes = context.obtainStyledAttributes(attrs, getAttributes(context), R.attr.radioButtonStyle, 0);
value = attributes.getResourceId(getAttribute(context), View.NO_ID);
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
Log.d("Exception RadioGroupColumns Construct",e.toString());
e.printStackTrace();
}
catch (ClassNotFoundException e) {
Log.d("Exception RadioGroupColumns Construct",e.toString());
e.printStackTrace();
}
if (value != View.NO_ID) {
mCheckedId = value;
}
//hardcode it to vertical
//final int index = attributes.getInt(com.android.internal.R.styleable.RadioGroup_orientation, VERTICAL);
//setOrientation(index);
attributes.recycle();
setOrientation(VERTICAL);
init();
}
@Override
public void onClick(View v) {
if (v instanceof TableRow) {
TableRow row = (TableRow)v;
for (int j=0;j<row.getChildCount();j++) {
if (RadioButton.class.isAssignableFrom(row.getChildAt(j).getClass())) {
((RadioButton) row.getChildAt(j)).setChecked(true);
activeRadioButton = (RadioButton) row.getChildAt(j);
}
}
}
else {
final RadioButton rb = (RadioButton) v;
if (activeRadioButton != null) {
activeRadioButton.setChecked(false);
}
rb.setChecked(true);
activeRadioButton = rb;
}
}
private void init() {
mChildOnCheckedChangeListener = new CheckedStateTracker();
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setOnHierarchyChangeListener(mPassThroughListener);
}
private int getAttribute(Context con) throws ClassNotFoundException, IllegalArgumentException, IllegalAccessException {
//use reflect to get styleable class.
Field[] alFields = null;
ArrayList<Integer> alInts = new ArrayList<Integer>();
int R_ID = 0;
for (Class c : android.R.class.getClasses()) {
if (c.getName().indexOf("styleable") >= 0) {
alFields = Class.forName( con.getPackageName() + ".R$styleable" ).getFields();
}
}
for (Field f : alFields) {
Log.d("field name",f.getName());
if (f.getName().equals("RadioGroup_checkedButton")) {
int[] ret = (int[])f.get(null);
R_ID = ret[0];
}
}
return R_ID;
}
//gets all RadioGroup R,android.internal.styleable.RadioGroup values
private int[] getAttributes(Context con) throws IllegalAccessException, ClassNotFoundException {
//use reflect to get styleable class.
Field[] alFields = null;
ArrayList<Integer> alInts = new ArrayList<Integer>();
int[] ints = null;
int count = 0;
try {
for (Class c : android.R.class.getClasses()) {
if (c.getName().indexOf("styleable") >= 0) {
Log.d("get Class Name Outer", c.getName());
//use reflection to access the resource class
alFields = Class.forName( con.getPackageName() + ".R$styleable" ).getFields();
}
}
if (alFields != null)
{
Log.d("field numbers size", String.valueOf(alFields.length));
for (Field field : alFields) {
Class<?> targetType = field.getType();
Log.d("field type", field.getType().toString());
if (targetType.equals(Integer.TYPE) && targetType.isPrimitive()) {
//alInts.add((Integer)field);
Object objectValue = (Integer)field.getInt(null);
//Object objectValue = (Integer)targetType.newInstance();
alInts.add((Integer)objectValue);
count++;
}
ints = new int[count];
for (int i=0;i<alInts.size();i++) {
ints[i] = alInts.get(i);
}
}
}
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (ClassNotFoundException e) {
e.printStackTrace();
}
return ints;
}
public void check(int id) {
// don't even bother
if (id != -1 && (id == mCheckedId)) {
return;
}
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
if (id != -1) {
setCheckedStateForView(id, true);
}
activeRadioButton = (RadioButton) findViewById(id);
activeRadioButton.setChecked(true);
setCheckedId(id);
}
public void setOnCheckedChangeListener(RadioGroupColumns.OnCheckedChangeListener onCheckedChangeListener) {
mOnCheckedChangeListener = (OnCheckedChangeListener) onCheckedChangeListener;
}
private void setCheckedId(int id) {
mCheckedId = id;
if (mOnCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
}
}
private void setCheckedStateForView(int viewId, boolean checked) {
View checkedView = findViewById(viewId);
if (!RadioButton.class.isAssignableFrom(checkedView.getClass()) && checkedView != null) {
TableRow row = (TableRow) checkedView;
for (int j=0;j<row.getChildCount();j++) {
RadioButton button = (RadioButton) row.getChildAt(j);
if (button.isChecked() && button != null) {
button.setChecked(checked);
}
}
}
if (checkedView != null && checkedView instanceof RadioButton) {
((RadioButton) checkedView).setChecked(checked);
}
}
/*
* (non-Javadoc)
*
* @see android.widget.TableLayout#addView(android.view.View, int,
* android.view.ViewGroup.LayoutParams)
*/
@Override
public void addView(View child, int index,
android.view.ViewGroup.LayoutParams params) {
super.addView(child, index, params);
setChildrenOnClickListener((TableRow) child);
}
/*
* (non-Javadoc)
*
* @see android.widget.TableLayout#addView(android.view.View,
* android.view.ViewGroup.LayoutParams)
*/
@Override
public void addView(View child, android.view.ViewGroup.LayoutParams params) {
super.addView(child, params);
setChildrenOnClickListener((TableRow) child);
}
private void setChildrenOnClickListener(TableRow tr) {
final int c = tr.getChildCount();
for (int i = 0; i < c; i++) {
final View v = tr.getChildAt(i);
if (v instanceof RadioButton) {
v.setOnClickListener(this);
}
}
}
public int getCheckedRadioButtonId() {
if (activeRadioButton != null) {
return activeRadioButton.getId();
}
return -1;
}
public interface OnCheckedChangeListener {
public void onCheckedChanged(RadioGroupColumns group, int checkedId);
}
private class CheckedStateTracker implements CompoundButton.OnCheckedChangeListener {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// prevents from infinite recursion
if (mProtectFromCheckedChange) {
return;
}
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
int id = buttonView.getId();
setCheckedId(id);
}
}
private class PassThroughHierarchyChangeListener implements android.view.ViewGroup.OnHierarchyChangeListener {
private android.view.ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
/**
* {@inheritDoc}
*/
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public void onChildViewAdded(View parent, View child) {
if (parent == RadioGroupColumns.this
&& child instanceof RadioButton) {
int id = child.getId();
// generates an id if it's missing
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
((RadioButton) child).setOnCheckedChangeListener((com.assistek.ediary.RadioButton.OnCheckedChangeListener) mChildOnCheckedChangeListener);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewAdded(parent, child);
}
}
/**
* {@inheritDoc}
*/
public void onChildViewRemoved(View parent, View child) {
if (parent == RadioGroupColumns.this
&& child instanceof RadioButton) {
((RadioButton) child).setOnCheckedChangeListener(null);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
}
}
}
}
Here is the code adding the radio buttons to the extended radiogroup:
private void setupRadioButtonAnswers() {
ArrayList<HolderAnswer> listAnswers = GlobalVars.questionHolders[GlobalVars.arrayRowNumber]
.getListAnswers();
ArrayList<ArrayList<HolderAnswer>> listAnswersSorted = new ArrayList<ArrayList<HolderAnswer>>();
ArrayList<TableRow> alTableRows = new ArrayList<TableRow>();
int NumberInColumns = (int) Math.floor(listAnswers.size() / NUMBER_OF_COLUMNS);
// make higher number of answers on the right
if (listAnswers.size() % NUMBER_OF_COLUMNS > 0)
NumberInColumns++;
for (int i = 0; i < NumberInColumns; i++) {
TableRow row = new TableRow(this);
TableRow.LayoutParams lp = new TableRow.LayoutParams(
TableRow.LayoutParams.WRAP_CONTENT);
row.setLayoutParams(lp);
alTableRows.add(row);
}
int count = 0;
// sort by row
/*
* a[0] = "Question 1"
a[1] = "Question 2"
a[2] = "Question 3"
a[3] = "Question 4"
a[4] = "Question 5"
a[5] = "Question 6"
a[6] = "Question 7"
sorted to:
a[0] = "Question 1" a[1] = "Question 5"
a[2] = "Question 2" a[3] = "Question 6"
a[4] = "Question 3" a[5] = "Question 7"
a[6] = "Question 4"
*/
// initialize the ArrayLists in listAnswersSorted
int numRows = listAnswers.size() / NUMBER_OF_COLUMNS + 1;
for (int i = 0; i < numRows; i += 1) {
listAnswersSorted.add(new ArrayList<HolderAnswer>());
}
// calculate column index where the "step" happens
int step = listAnswers.size() % NUMBER_OF_COLUMNS;
// loop through and add elements to listAnswersSorted
int index = 0;
int row = 0;
int col = 0;
while (index < listAnswers.size()) {
listAnswersSorted.get(row).add(listAnswers.get(index));
int rows = col < step ? numRows : numRows - 1;
row += 1;
if (row == rows) {
row = 0;
col += 1;
}
index += 1;
}
row = 0;
int columncount = 1;
for (ArrayList<HolderAnswer> sortedArrayList : listAnswersSorted) {
for (HolderAnswer answer : sortedArrayList) {
final RadioButton button = new RadioButton(this);
button.setTag(answer.getRecID());
button.setId(GlobalVars.getLatestId());
button.setTextColor(Color.BLACK);
GlobalVars.setupText(con, button, answer.getTextID());
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
button.setEnabled(false);
handlerReenableView.sendEmptyMessageDelayed(button.getId(), 1000);
button.setChecked(true);
radioGroup.check(button.getId());
}
});
button.setLayoutParams(new TableRow.LayoutParams(columncount));
alTableRows.get(row).addView(button);
if (columncount==NUMBER_OF_COLUMNS) {
columncount = 1;
radioGroup.addView(alTableRows.get(row));
alTableRows.get(row).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int k=0;k<((TableRow) v).getChildCount();k++) {
TableRow row = (TableRow) v;
for (int l=0;l<row.getChildCount();l++) {
RadioButton tableButton = (RadioButton) row.getChildAt(l);
if (tableButton.isChecked) {
radioGroup.check(tableButton.getId());
}
}
}
}
});
}
else {
columncount++;
}
//if (row=NumberInColumns)
count++;
}
if (count == listAnswers.size()) {
radioGroup.addView(alTableRows.get(row));
}
row++;
}
radioGroup.setOnCheckedChangeListener(new RadioGroupColumns.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroupColumns group, int checkedId) {
Log.d("We're here",String.valueOf(checkedId));
if (checkedId == -1) {
for (int i = 0; i < radioGroup.getChildCount(); i++) {
TableRow row = (TableRow)radioGroup.getChildAt(i);
for (int j=0;j<row.getChildCount();j++) {
if (RadioButton.class.isAssignableFrom(row.getChildAt(j).getClass())) {
((RadioButton) row.getChildAt(j)).setChecked(false);
}
}
}
} else {
for (int i = 0; i < radioGroup.getChildCount(); i++) {
TableRow row = (TableRow)radioGroup.getChildAt(i);
for (int j=0;j<row.getChildCount();j++) {
if (RadioButton.class.isAssignableFrom(row.getChildAt(j).getClass())
&& row.getChildAt(j).getId() != -1) {
((RadioButton) row.getChildAt(j)).setChecked(false);
}
}
}
RadioButton checkedRadioButton = (RadioButton) radioGroup.findViewById(checkedId);
checkedRadioButton.setChecked(true);
Log.d("checkedID onchecked Change()", String.valueOf(radioGroup.getCheckedRadioButtonId()));
}
}
});
}
If the layout is not complicated, best way is to use Single RelativeLayout instead of multiple Linear Layouts.
Below is the code with 2 rows. First row has 3 columns. Second row one column.
<RadioGroup
android:id="@+id/radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="4dp"
android:layout_marginTop="4dp"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.AppCompatRadioButton
android:id="@+id/r1c1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginRight="8dp"
android:gravity="center"
android:text="Row 1 Column1" />
<android.support.v7.widget.AppCompatRadioButton
android:id="@+id/r2c1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/r1c1"
android:layout_gravity="left|center_vertical"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:gravity="left|center_vertical"
android:text="Row 2 Column 1" />
<android.support.v7.widget.AppCompatRadioButton
android:id="@+id/r1c2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="8dp"
android:layout_toRightOf="@id/r1c1"
android:gravity="center"
android:text="Row 1 Column 2"/>
<android.support.v7.widget.AppCompatRadioButton
android:id="@+id/r1c3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="8dp"
android:layout_toRightOf="@id/r1c2"
android:gravity="center"
android:text="Row 1 Column 3" />
</RelativeLayout>
</RadioGroup>
UPDATE: I updated the code since I posted it here. The updated one is in this link: https://github.com/Gavras/MultiLineRadioGroup/blob/master/app/src/main/java/com/whygraphics/multilineradiogroup/MultiLineRadioGroup.java
Something really small I did when I needed multi line radio group
It's a custom view that extends RadioGroup.
you have the ability to choose the maximum buttons you want in a row. It is based on TableLayout so it aligns the buttons too. Everything is documented.
/**
* Layout that arranges radio buttons in multiple lines.
* Only one radio button can be checked at the same time.
* <p>
* XML Attributes:
* <p>
* max_in_row:
* A non-negative number that represents the maximum radio buttons in a row,
* 0 for all in one line.
* <p>
* radio_buttons:
* String-array resource reference that represents the texts of the desired radio buttons.
* <p>
* default_button:
* String that represents the text or the index of the radio button to be checked by default.
* The string should be in the following format:
* for text: "text:[text-of-button]" where text-of-button is the text of the button to check.
* for index: "index:[index-of-button]" where index-of-button is the index of the button to check.
* when the prefix omitted, "text:" inserted implicitly.
*/
public class MultiLineRadioGroup extends RadioGroup {
private static final String XML_DEFAULT_BUTTON_PREFIX_INDEX = "index:";
private static final String XML_DEFAULT_BUTTON_PREFIX_TEXT = "text:";
private static final int DEF_VAL_MAX_IN_ROW = 0;
private OnCheckedChangeListener mOnCheckedChangeListener;
private int mMaxInRow;
// all buttons are stored in table layout
private TableLayout mTableLayout;
// list to store all the buttons
private List<RadioButton> mRadioButtons;
// the checked button
private RadioButton checkedButton;
/**
* Creates a new MultiLineRadioGroup for the given context.
*
* @param context the application environment
*/
public MultiLineRadioGroup(Context context) {
super(context);
init(null);
}
/**
* Creates a new MultiLineRadioGroup for the given context
* and with the specified set attributes.
*
* @param context the application environment
* @param attrs a collection of attributes
*/
public MultiLineRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
}
// initializes the layout
private void init(AttributeSet attrs) {
mRadioButtons = new ArrayList<>();
mTableLayout = getTableLayout();
addView(mTableLayout);
if (attrs != null)
initAttrs(attrs);
}
// initializes the layout with the specified attributes
private void initAttrs(AttributeSet attrs) {
TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(
attrs, R.styleable.multi_line_radio_group,
0, 0);
try {
// gets and sets the max in row.
setMaxInRow(typedArray.getInt(R.styleable.multi_line_radio_group_max_in_row,
DEF_VAL_MAX_IN_ROW));
// gets and adds the starting buttons
CharSequence[] radioButtonStrings = typedArray.getTextArray(
R.styleable.multi_line_radio_group_radio_buttons);
addButtons(radioButtonStrings);
// gets the default button and checks it if presents.
String string = typedArray.getString(R.styleable.multi_line_radio_group_default_button);
if (string != null)
setDefaultButton(string);
} finally {
typedArray.recycle();
}
}
// checks the default button based on the passed string
private void setDefaultButton(String string) {
final int START_OF_INDEX = 6;
final int START_OF_TEXT = 5;
// the text of the button to check
String buttonToCheck;
if (string.startsWith(XML_DEFAULT_BUTTON_PREFIX_INDEX)) {
String indexString = string.substring(START_OF_INDEX, string.length());
int index = Integer.parseInt(indexString);
if (index < 0 || index >= mRadioButtons.size())
throw new IllegalArgumentException("index must be between 0 to getRadioButtonCount() - 1 [" +
(getRadioButtonCount() - 1) + "]");
buttonToCheck = mRadioButtons.get(index).getText().toString();
} else if (string.startsWith(XML_DEFAULT_BUTTON_PREFIX_TEXT)) {
buttonToCheck = string.substring(START_OF_TEXT, string.length());
} else { // when there is no prefix assumes the string is the text of the button
buttonToCheck = string;
}
check(buttonToCheck);
}
/**
* Returns the table layout to set to this layout.
*
* @return the table layout
*/
protected TableLayout getTableLayout() {
return (TableLayout) LayoutInflater.from(getContext())
.inflate(R.layout.table_layout, this, false);
}
/**
* Returns the table row to set in this layout.
*
* @return the table row
*/
protected TableRow getTableRow() {
return (TableRow) LayoutInflater.from(getContext())
.inflate(R.layout.table_row, mTableLayout, false);
}
/**
* Returns the radio button to set in this layout.
*
* @return the radio button
*/
protected RadioButton getRadioButton() {
return (RadioButton) LayoutInflater.from(getContext())
.inflate(R.layout.radio_button, null);
}
/**
* Register a callback to be invoked when a radio button is checked.
*
* @param onCheckedChangeListener the listener to attach
*/
public void setOnCheckedChangeListener(OnCheckedChangeListener onCheckedChangeListener) {
this.mOnCheckedChangeListener = onCheckedChangeListener;
}
/**
* Sets the maximum radio buttons in a row, 0 for all in one line
* and arranges the layout accordingly.
*
* @param maxInRow the maximum radio buttons in a row
* @throws IllegalArgumentException if maxInRow is negative
*/
public void setMaxInRow(int maxInRow) {
if (maxInRow < 0)
throw new IllegalArgumentException("maxInRow must not be negative");
this.mMaxInRow = maxInRow;
arrangeButtons();
}
/**
* Adds a view to the layout
* <p>
* Consider using addButtons() instead
*
* @param child the view to add
*/
@Override
public void addView(View child) {
addView(child, -1, child.getLayoutParams());
}
/**
* Adds a view to the layout in the specified index
* <p>
* Consider using addButtons() instead
*
* @param child the view to add
* @param index the index in which to insert the view
*/
@Override
public void addView(View child, int index) {
addView(child, index, child.getLayoutParams());
}
/**
* Adds a view to the layout with the specified width and height.
* Note that for radio buttons the width and the height are ignored.
* <p>
* Consider using addButtons() instead
*
* @param child the view to add
* @param width the width of the view
* @param height the height of the view
*/
@Override
public void addView(View child, int width, int height) {
addView(child, -1, new LinearLayout.LayoutParams(width, height));
}
/**
* Adds a view to the layout with the specified layout params.
* Note that for radio buttons the params are ignored.
* <p>
* Consider using addButtons() instead
*
* @param child the view to add
* @param params the layout params of the view
*/
@Override
public void addView(View child, ViewGroup.LayoutParams params) {
addView(child, -1, params);
}
/**
* Adds a view to the layout in the specified index
* with the specified layout params.
* Note that for radio buttons the params are ignored.
* <p>
* * Consider using addButtons() instead
*
* @param child the view to add
* @param index the index in which to insert the view
* @param params the layout params of the view
*/
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (params == null) {
params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
}
if (child instanceof RadioButton)
addButtons(index, ((RadioButton) child).getText());
else
super.addView(child, index, params);
}
/**
* Adds radio buttons to the layout based on the texts in the radioButtons array.
* Adds them in the last index.
* If radioButtons is null does nothing.
*
* @param radioButtons the texts of the buttons to add
*/
public void addButtons(CharSequence... radioButtons) {
addButtons(-1, radioButtons);
}
/**
* Adds radio buttons to the layout based on the texts in the radioButtons array.
* Adds them in the specified index, -1 for the last index.
* If radioButtons is null does nothing.
*
* @param index the index in which to insert the radio buttons
* @param radioButtons the texts of the buttons to add
* @throws IllegalArgumentException if index is less than -1 or greater than the number of radio buttons
*/
public void addButtons(int index, CharSequence... radioButtons) {
if (index < -1 || index > mRadioButtons.size())
throw new IllegalArgumentException("index must be between -1 to getRadioButtonCount() [" +
getRadioButtonCount() + "]");
if (radioButtons == null)
return;
int realIndex = (index != -1) ? index : mRadioButtons.size();
// adds the buttons to the list
for (CharSequence text : radioButtons)
mRadioButtons.add(realIndex++, createRadioButton(text));
arrangeButtons();
}
// creates a radio button with the specified text
private RadioButton createRadioButton(CharSequence text) {
RadioButton radioButton = getRadioButton();
radioButton.setText(text);
radioButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
checkButton((RadioButton) v);
if (mOnCheckedChangeListener != null)
mOnCheckedChangeListener.onCheckedChanged(MultiLineRadioGroup.this, checkedButton);
}
});
return radioButton;
}
/**
* Removes a view from the layout.
* <p>
* Consider using removeButton().
*
* @param view the view to remove
*/
@Override
public void removeView(View view) {
super.removeView(view);
}
/**
* Removes a view from the layout in the specified index.
* <p>
* Consider using removeButton().
*
* @param index the index from which to remove the view
*/
@Override
public void removeViewAt(int index) {
super.removeViewAt(index);
}
/**
* Removes the specified range of views from the layout.
* <p>
* Consider using removeButtons().
*
* @param start the start index to remove
* @param count the number of views to remove
*/
@Override
public void removeViews(int start, int count) {
super.removeViews(start, count);
}
/**
* Removes all the views from the layout.
* <p>
* Consider using removeAllButtons().
*/
@Override
public void removeAllViews() {
super.removeAllViews();
}
/**
* Removes a radio button from the layout.
* If the radio button is null does nothing.
*
* @param radioButton the radio button to remove
*/
public void removeButton(RadioButton radioButton) {
if (radioButton == null)
return;
removeButton(radioButton.getText());
}
/**
* Removes a radio button from the layout based on its text.
* Removes the first occurrence.
* If the text is null does nothing.
*
* @param text the text of the radio button to remove
*/
public void removeButton(CharSequence text) {
if (text == null)
return;
int index = -1;
for (int i = 0, len = mRadioButtons.size(); i < len; i++) {
// checks if the texts are equal
if (mRadioButtons.get(i).getText().equals(text)) {
index = i;
break;
}
}
// removes just if the index was found
if (index != -1)
removeButton(index);
}
/**
* Removes the radio button in the specified index from the layout.
*
* @param index the index from which to remove the radio button
* @throws IllegalArgumentException if index is less than 0
* or greater than the number of radio buttons - 1
*/
public void removeButton(int index) {
removeButtons(index, 1);
}
/**
* Removes all the radio buttons in the specified range from the layout.
* Count can be any non-negative number.
*
* @param start the start index to remove
* @param count the number of radio buttons to remove
* @throws IllegalArgumentException if index is less than 0
* or greater than the number of radio buttons - 1
* or count is negative
*/
public void removeButtons(int start, int count) {
if (start < 0 || start >= mRadioButtons.size())
throw new IllegalArgumentException("remove index must be between 0 to getRadioButtonCount() - 1 [" +
(getRadioButtonCount() - 1) + "]");
if (count < 0)
throw new IllegalArgumentException("count must not be negative");
if (count == 0)
return;
int endIndex = start + count - 1;
// if endIndex is not in the range of the radio buttons sets it to the last index
if (endIndex >= mRadioButtons.size())
endIndex = mRadioButtons.size() - 1;
// iterates over the buttons to remove
for (int i = endIndex; i >= start; i--) {
RadioButton radiobutton = mRadioButtons.get(i);
// if the button to remove is the checked button set checkedButton to null
if (radiobutton == checkedButton)
checkedButton = null;
// removes the button from the list
mRadioButtons.remove(i);
}
arrangeButtons();
}
/**
* Removes all the radio buttons from the layout.
*/
public void removeAllButtons() {
removeButtons(0, mRadioButtons.size());
}
// arrange the button in the layout
private void arrangeButtons() {
// iterates over each button and puts it in the right place
for (int i = 0, len = mRadioButtons.size(); i < len; i++) {
RadioButton radioButtonToPlace = mRadioButtons.get(i);
int rowToInsert = (mMaxInRow != 0) ? i / mMaxInRow : 0;
int columnToInsert = (mMaxInRow != 0) ? i % mMaxInRow : i;
// gets the row to insert. if there is no row create one
TableRow tableRowToInsert = (mTableLayout.getChildCount() <= rowToInsert)
? addTableRow() : (TableRow) mTableLayout.getChildAt(rowToInsert);
int tableRowChildCount = tableRowToInsert.getChildCount();
// if there is already a button in the position
if (tableRowChildCount > columnToInsert) {
RadioButton currentButton = (RadioButton) tableRowToInsert.getChildAt(columnToInsert);
// insert the button just if the current button is different
if (currentButton != radioButtonToPlace) {
// removes the current button
removeButtonFromParent(currentButton, tableRowToInsert);
// removes the button to place from its current position
removeButtonFromParent(radioButtonToPlace, (ViewGroup) radioButtonToPlace.getParent());
// adds the button to the right place
tableRowToInsert.addView(radioButtonToPlace, columnToInsert);
}
// if there isn't already a button in the position
} else {
// removes the button to place from its current position
removeButtonFromParent(radioButtonToPlace, (ViewGroup) radioButtonToPlace.getParent());
// adds the button to the right place
tableRowToInsert.addView(radioButtonToPlace, columnToInsert);
}
}
removeRedundancies();
}
// removes the redundant rows and radio buttons
private void removeRedundancies() {
// the number of rows to fit the buttons
int rows;
if (mRadioButtons.size() == 0)
rows = 0;
else if (mMaxInRow == 0)
rows = 1;
else
rows = (mRadioButtons.size() - 1) / mMaxInRow + 1;
int tableChildCount = mTableLayout.getChildCount();
// if there are redundant rows remove them
if (tableChildCount > rows)
mTableLayout.removeViews(rows, tableChildCount - rows);
tableChildCount = mTableLayout.getChildCount();
int maxInRow = (mMaxInRow != 0) ? mMaxInRow : mRadioButtons.size();
// iterates over the rows
for (int i = 0; i < tableChildCount; i++) {
TableRow tableRow = (TableRow) mTableLayout.getChildAt(i);
int tableRowChildCount = tableRow.getChildCount();
int startIndexToRemove;
int count;
// if it is the last row removes all redundancies after the last button in the list
if (i == tableChildCount - 1) {
startIndexToRemove = (mRadioButtons.size() - 1) % maxInRow + 1;
count = tableRowChildCount - startIndexToRemove;
// if it is not the last row removes all the buttons after maxInRow position
} else {
startIndexToRemove = maxInRow;
count = tableRowChildCount - maxInRow;
}
if (count > 0)
tableRow.removeViews(startIndexToRemove, count);
}
}
// adds and returns a table row
private TableRow addTableRow() {
TableRow tableRow = getTableRow();
mTableLayout.addView(tableRow);
return tableRow;
}
// removes a radio button from a parent
private void removeButtonFromParent(RadioButton radioButton, ViewGroup parent) {
if (radioButton == null || parent == null)
return;
parent.removeView(radioButton);
}
/**
* Returns the number of radio buttons.
*
* @return the number of radio buttons
*/
public int getRadioButtonCount() {
return mRadioButtons.size();
}
/**
* Returns the radio button in the specified index.
* If the index is out of range returns null.
*
* @param index the index of the radio button
* @return the radio button
*/
public RadioButton getRadioButtonAt(int index) {
if (index < 0 || index >= mRadioButtons.size())
return null;
return mRadioButtons.get(index);
}
/**
* Checks the radio button with the specified id.
* If the specified id is not found does nothing.
*
* @param id the radio button's id
*/
@Override
public void check(int id) {
if (id <= 0)
return;
for (RadioButton radioButton : mRadioButtons) {
if (radioButton.getId() == id) {
checkButton(radioButton);
return;
}
}
}
/**
* Checks the radio button with the specified text.
* If there is more than one radio button associated with this text
* checks the first radio button.
* If the specified text is not found does nothing.
*
* @param text the radio button's text
*/
public void check(CharSequence text) {
if (text == null)
return;
for (RadioButton radioButton : mRadioButtons) {
if (radioButton.getText().equals(text)) {
checkButton(radioButton);
return;
}
}
}
/**
* Checks the radio button at the specified index.
* If the specified index is invalid does nothing.
*
* @param index the radio button's index
*/
public void checkAt(int index) {
if (index < 0 || index >= mRadioButtons.size())
return;
checkButton(mRadioButtons.get(index));
}
// checks and switches the button with the checkedButton
private void checkButton(RadioButton button) {
if (button == null)
return;
// if the button to check is different from the current checked button
if (button != checkedButton) {
// if exists sets checkedButton to null
if (checkedButton != null)
checkedButton.setChecked(false);
button.setChecked(true);
checkedButton = button;
}
}
/**
* Clears the checked radio button
*/
@Override
public void clearCheck() {
checkedButton.setChecked(false);
checkedButton = null;
}
/**
* Returns the checked radio button's id.
* If no radio buttons are checked returns -1.
*
* @return the checked radio button's id
*/
@Override
public int getCheckedRadioButtonId() {
if (checkedButton == null)
return -1;
return checkedButton.getId();
}
/**
* Returns the checked radio button's index.
* If no radio buttons are checked returns -1.
*
* @return the checked radio button's index
*/
public int getCheckedRadioButtonIndex() {
if (checkedButton == null)
return -1;
return mRadioButtons.indexOf(checkedButton);
}
/**
* Returns the checked radio button's text.
* If no radio buttons are checked returns null.
*
* @return the checked radio buttons's text
*/
public CharSequence getCheckedRadioButtonText() {
if (checkedButton == null)
return null;
return checkedButton.getText();
}
/**
* Interface definition for a callback to be invoked when a radio button is checked.
*/
public interface OnCheckedChangeListener {
/**
* Called when a radio button is checked.
*
* @param group the MultiLineRadioGroup that stores the radio button
* @param button the radio button that was checked
*/
void onCheckedChanged(MultiLineRadioGroup group, RadioButton button);
}
}
values/attrs.xml file:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="multi_line_radio_group">
<attr name="max_in_row" format="integer" />
<attr name="radio_buttons" format="reference" />
<attr name="default_button" format="string" />
</declare-styleable>
</resources>
R.layout.table_layout:
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/table_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:stretchColumns="*" />
R.layout.table_row:
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/table_row"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
R.layout.radio_button:(you can change the text size here)
<?xml version="1.0" encoding="utf-8"?>
<RadioButton xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/radio_button"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textSize="@dimen/radio_button_text_size" />
Example using this layout from xml:
<?xml version="1.0" encoding="utf-8"?>
<[package].MultiLineRadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:multi_line_radio_group="http://schemas.android.com/apk/res-auto"
android:id="@+id/multi_line_radio_group"
android:layout_width="match_parent"
android:layout_height="match_parent"
multi_line_radio_group:default_button="@string/defaultText"
multi_line_radio_group:max_in_row="@integer/radio_button_max_in_row"
multi_line_radio_group:radio_buttons="@array/radio_buttons" />
I created my own RadioGridLayout which include RadioGroup code and extends GridLayout. You can copy this code. For me working well. After you can use this layout in your xml. And customize like grid layout.
For R.styleable.RadioGridLayout_checked I used code like this:
<resources>
<declare-styleable name="RadioGridLayout">
<attr name="checked" format="integer" />
</declare-styleable>
</resources>
public class RadioGridLayout extends GridLayout {
private int mCheckedId = -1;
private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
private boolean mProtectFromCheckedChange = false;
private OnCheckedChangeListener mOnCheckedChangeListener;
private PassThroughHierarchyChangeListener mPassThroughListener;
private void setCheckedId(@IdRes int id) {
mCheckedId = id;
if (mOnCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
}
AutofillManager afm = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
afm = getContext().getSystemService(AutofillManager.class);
}
if (afm != null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
afm.notifyValueChanged(this);
}
}
}
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
mOnCheckedChangeListener = listener;
}
public interface OnCheckedChangeListener {
void onCheckedChanged(RadioGridLayout group, @IdRes int checkedId);
}
private int mInitialCheckedId = View.NO_ID;
public RadioGridLayout(Context context) {
super(context);
setOrientation(VERTICAL);
init();
}
public RadioGridLayout(Context context, AttributeSet attrs) {
super(context, attrs);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
if (getImportantForAutofill() == IMPORTANT_FOR_AUTOFILL_AUTO) {
setImportantForAutofill(IMPORTANT_FOR_AUTOFILL_YES);
}
}
TypedArray attributes = context.obtainStyledAttributes(
attrs,
R.styleable.RadioGridLayout,
R.attr.radioButtonStyle, 0);
int value = attributes.getResourceId(R.styleable.RadioGridLayout_checked, View.NO_ID);
if (value != View.NO_ID) {
mCheckedId = value;
mInitialCheckedId = value;
}
attributes.recycle();
init();
}
private void init() {
mChildOnCheckedChangeListener = new CheckedStateTracker();
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setOnHierarchyChangeListener(mPassThroughListener);
}
@Override
public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
mPassThroughListener.mOnHierarchyChangeListener = listener;
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
if (mCheckedId != -1) {
mProtectFromCheckedChange = true;
setCheckedStateForView(mCheckedId, true);
mProtectFromCheckedChange = false;
setCheckedId(mCheckedId);
}
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (child instanceof RadioButton) {
final RadioButton button = (RadioButton) child;
if (button.isChecked()) {
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
setCheckedId(button.getId());
}
}
super.addView(child, index, params);
}
public void check(@IdRes int id) {
if (id != -1 && (id == mCheckedId)) {
return;
}
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
if (id != -1) {
setCheckedStateForView(id, true);
}
setCheckedId(id);
}
private void setCheckedStateForView(int viewId, boolean checked) {
View checkedView = findViewById(viewId);
if (checkedView != null && checkedView instanceof RadioButton) {
((RadioButton) checkedView).setChecked(checked);
}
}
@IdRes
public int getCheckedRadioButtonId() {
return mCheckedId;
}
public void clearCheck() {
check(-1);
}
@Override
public GridLayout.LayoutParams generateLayoutParams(AttributeSet attrs) {
return new GridLayout.LayoutParams(getContext(), attrs);
}
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof RadioGroup.LayoutParams;
}
@Override
protected GridLayout.LayoutParams generateDefaultLayoutParams() {
return new LayoutParams();
}
@Override
public CharSequence getAccessibilityClassName() {
return RadioGroup.class.getName();
}
public static class LayoutParams extends GridLayout.LayoutParams {
public LayoutParams(Spec rowSpec, Spec columnSpec) {
super(rowSpec, columnSpec);
}
public LayoutParams() {
super();
}
public LayoutParams(ViewGroup.LayoutParams params) {
super(params);
}
public LayoutParams(MarginLayoutParams params) {
super(params);
}
public LayoutParams(GridLayout.LayoutParams source) {
super(source);
}
public LayoutParams(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void setBaseAttributes(TypedArray a,
int widthAttr, int heightAttr) {
if (a.hasValue(widthAttr)) {
width = a.getLayoutDimension(widthAttr, "layout_width");
} else {
width = WRAP_CONTENT;
}
if (a.hasValue(heightAttr)) {
height = a.getLayoutDimension(heightAttr, "layout_height");
} else {
height = WRAP_CONTENT;
}
}
}
private class CheckedStateTracker implements CompoundButton.OnCheckedChangeListener {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (mProtectFromCheckedChange) {
return;
}
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
int id = buttonView.getId();
setCheckedId(id);
}
}
private class PassThroughHierarchyChangeListener implements
ViewGroup.OnHierarchyChangeListener {
private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
@Override
public void onChildViewAdded(View parent, View child) {
if (parent == RadioGridLayout.this && child instanceof RadioButton) {
int id = child.getId();
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
((RadioButton) child).setOnCheckedChangeListener(
mChildOnCheckedChangeListener);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewAdded(parent, child);
}
}
@Override
public void onChildViewRemoved(View parent, View child) {
if (parent == RadioGridLayout.this && child instanceof RadioButton) {
((RadioButton) child).setOnCheckedChangeListener(null);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
}
}
}
@Override
public void onProvideAutofillStructure(ViewStructure structure, int flags) {
super.onProvideAutofillStructure(structure, flags);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
structure.setDataIsSensitive(mCheckedId != mInitialCheckedId);
}
}
@Override
public void autofill(AutofillValue value) {
if (!isEnabled()) return;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
if (!value.isList()) {
Timber.w(value + " could not be autofilled into " + this);
return;
}
}
int index = 0;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
index = value.getListValue();
}
final View child = getChildAt(index);
if (child == null) {
Timber.w("RadioGroup.autoFill(): no child with index %s", index);
return;
}
check(child.getId());
}
@Override
public int getAutofillType() {
return isEnabled() ? AUTOFILL_TYPE_LIST : AUTOFILL_TYPE_NONE;
}
@Override
public AutofillValue getAutofillValue() {
if (!isEnabled()) return null;
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getId() == mCheckedId) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
return AutofillValue.forList(i);
}
}
}
return null;
}
}
A couple of the other answers work fine, but are more complicated than required for simpler cases. If you just want multiple RadioGroups to act as one and can handle all of the decision making at the time of the click, then you can do this:
In your layout XML, add the same click handler to all of the RadioButtons that you want combined:
android:onClick="handleCombinedClick"
Then, make your click handler look something like this:
public void handleCombinedClick(View view) {
// Clear any checks from both groups:
rg1.clearCheck();
rg2.clearCheck();
// Manually set the check in the newly clicked radio button:
((RadioButton) view).setChecked(true);
// Perform any action desired for the new selection:
switch (view.getId()) {
case R.id.radio_button_1:
// do something
break;
case R.id.radio_button_2:
// do something
break;
...
}
}
This has the added benefit of having all of your choices handled in the same spot. And if you want to extend this to 3 or more RadioGroups, then you just need to add an additional rgX.clearCheck(); line for each added group.
I'm sure your question has been answered by now, but here is another take on it. With this code you can wrap your radio buttons into any layout you want (you don't need a radio group at all in fact). Also I would suggest using linear layouts to make the columns/rows you need.
My code is based on @infografnet and @lostdev (also thanks @Neromancer for the Compound Button suggestion!)
public class AdvRadioGroup {
public interface OnButtonCheckedListener {
void onButtonChecked(CompoundButton button);
}
private final List<CompoundButton> buttons;
private final View.OnClickListener onClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
setChecked((CompoundButton) v);
}
};
private OnButtonCheckedListener listener;
private CompoundButton lastChecked;
public AdvRadioGroup(View view) {
buttons = new ArrayList<>();
parseView(view);
}
private void parseView(final View view) {
if(view instanceof CompoundButton) {
buttons.add((CompoundButton) view);
view.setOnClickListener(onClick);
} else if(view instanceof ViewGroup) {
final ViewGroup group = (ViewGroup) view;
for (int i = 0; i < group.getChildCount();i++) {
parseView(group.getChildAt(i));
}
}
}
public List<CompoundButton> getButtons() { return buttons; }
public CompoundButton getLastChecked() { return lastChecked; }
public void setChecked(int index) { setChecked(buttons.get(index)); }
public void setChecked(CompoundButton button) {
if(button == lastChecked) return;
for (CompoundButton btn : buttons) {
btn.setChecked(false);
}
button.setChecked(true);
lastChecked = button;
if(listener != null) {
listener.onButtonChecked(button);
}
}
public void setOnButtonCheckedListener(OnButtonCheckedListener listener) { this.listener = listener; }
}
Usage (with included listener):
AdvRadioGroup group = new AdvRadioGroup(findViewById(R.id.YOUR_VIEW));
group.setOnButtonCheckedListener(new AdvRadioGroup.OnButtonCheckedListener() {
@Override
public void onButtonChecked(CompoundButton button) {
// do fun stuff here!
}
});
Bonus: You can get the last checked button, the list of entire buttons, and you can check any button by index with this!
来源：https://stackoverflow.com/questions/10425569/radiogroup-with-two-columns-which-have-ten-radiobuttons