19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.widget; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.Context; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * A radio button is a two-states button that can be either checked or 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * unchecked. When the radio button is unchecked, the user can press or click it 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to check it. However, contrary to a {@link android.widget.CheckBox}, a radio 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * button cannot be unchecked by the user once checked. 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Radio buttons are normally used together in a 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.widget.RadioGroup}. When several radio buttons live inside 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a radio group, checking one radio button unchecks all the others.</p> 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3741ec65355bd6ded652769725b276d47c54a0d913Scott Main * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-formstuff.html">Form Stuff 3841ec65355bd6ded652769725b276d47c54a0d913Scott Main * tutorial</a>.</p> 3941ec65355bd6ded652769725b276d47c54a0d913Scott Main * 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p><strong>XML attributes</strong></p> 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See {@link android.R.styleable#CompoundButton CompoundButton Attributes}, 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#Button Button Attributes}, 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#TextView TextView Attributes}, 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#View View Attributes} 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class RadioButton extends CompoundButton { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public RadioButton(Context context) { 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public RadioButton(Context context, AttributeSet attrs) { 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.radioButtonStyle); 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public RadioButton(Context context, AttributeSet attrs, int defStyle) { 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@inheritDoc} 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If the radio button is already checked, this method will not toggle the radio button. 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void toggle() { 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // we override to prevent toggle when the radio is already 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // checked (as opposed to check boxes widgets) 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!isChecked()) { 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super.toggle(); 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 76