File	Doc	Category	Size	Date	Package
RadioGroup.java	API Doc	Android 5.1 API	13248	Thu Mar 12 22:22:10 GMT 2015	android.widget

RadioGroup

• java.lang.Object
  • LinearLayout

Fields Summary
private int	mCheckedId
private CompoundButton.OnCheckedChangeListener	mChildOnCheckedChangeListener
private boolean	mProtectFromCheckedChange
private OnCheckedChangeListener	mOnCheckedChangeListener
private PassThroughHierarchyChangeListener	mPassThroughListener

Constructors Summary
public RadioGroup(android.content.Context context) {@inheritDoc} super(context); setOrientation(VERTICAL); init();
public RadioGroup(android.content.Context context, android.util.AttributeSet attrs) {@inheritDoc} super(context, attrs); // retrieve selected radio button as requested by the user in the // XML layout file TypedArray attributes = context.obtainStyledAttributes( attrs, com.android.internal.R.styleable.RadioGroup, com.android.internal.R.attr.radioButtonStyle, 0); int value = attributes.getResourceId(R.styleable.RadioGroup_checkedButton, View.NO_ID); if (value != View.NO_ID) { mCheckedId = value; } final int index = attributes.getInt(com.android.internal.R.styleable.RadioGroup_orientation, VERTICAL); setOrientation(index); attributes.recycle(); init();

Methods Summary
public void	addView(android.view.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(int id) Sets the selection to the radio button whose identifier is passed in parameter. Using -1 as the selection identifier clears the selection; such an operation is equivalent to invoking {@link #clearCheck()}. param id the unique id of the radio button to select in this group see #getCheckedRadioButtonId() see #clearCheck() // don't even bother if (id != -1 && (id == mCheckedId)) { return; } if (mCheckedId != -1) { setCheckedStateForView(mCheckedId, false); } if (id != -1) { setCheckedStateForView(id, true); } setCheckedId(id);
protected boolean	checkLayoutParams(ViewGroup.LayoutParams p) {@inheritDoc} return p instanceof RadioGroup.LayoutParams;
public void	clearCheck() Clears the selection. When the selection is cleared, no radio button in this group is selected and {@link #getCheckedRadioButtonId()} returns null. see #check(int) see #getCheckedRadioButtonId() check(-1);
protected LinearLayout.LayoutParams	generateDefaultLayoutParams() return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
public android.widget.RadioGroup$LayoutParams	generateLayoutParams(android.util.AttributeSet attrs) {@inheritDoc} return new RadioGroup.LayoutParams(getContext(), attrs);
public int	getCheckedRadioButtonId() Returns the identifier of the selected radio button in this group. Upon empty selection, the returned value is -1. return the unique id of the selected radio button in this group see #check(int) see #clearCheck() attr ref android.R.styleable#RadioGroup_checkedButton return mCheckedId;
private void	init() mChildOnCheckedChangeListener = new CheckedStateTracker(); mPassThroughListener = new PassThroughHierarchyChangeListener(); super.setOnHierarchyChangeListener(mPassThroughListener);
protected void	onFinishInflate() {@inheritDoc} super.onFinishInflate(); // checks the appropriate radio button as requested in the XML file if (mCheckedId != -1) { mProtectFromCheckedChange = true; setCheckedStateForView(mCheckedId, true); mProtectFromCheckedChange = false; setCheckedId(mCheckedId); }
public void	onInitializeAccessibilityEvent(android.view.accessibility.AccessibilityEvent event) super.onInitializeAccessibilityEvent(event); event.setClassName(RadioGroup.class.getName());
public void	onInitializeAccessibilityNodeInfo(android.view.accessibility.AccessibilityNodeInfo info) super.onInitializeAccessibilityNodeInfo(info); info.setClassName(RadioGroup.class.getName());
private void	setCheckedId(int id) mCheckedId = id; if (mOnCheckedChangeListener != null) { mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId); }
private void	setCheckedStateForView(int viewId, boolean checked) View checkedView = findViewById(viewId); if (checkedView != null && checkedView instanceof RadioButton) { ((RadioButton) checkedView).setChecked(checked); }
public void	setOnCheckedChangeListener(android.widget.RadioGroup$OnCheckedChangeListener listener) Register a callback to be invoked when the checked radio button changes in this group. param listener the callback to call on checked state change mOnCheckedChangeListener = listener;
public void	setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {@inheritDoc} // the user listener is delegated to our pass-through listener mPassThroughListener.mOnHierarchyChangeListener = listener;