core/java/android/widget/CheckBox.java

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;


/**
 * <p>
 * A checkbox is a specific type of two-states button that can be either
 * checked or unchecked. A example usage of a checkbox inside your activity
 * would be the following:
 * </p>
 *
 * <pre class="prettyprint">
 * public class MyActivity extends Activity {
 *     protected void onCreate(Bundle icicle) {
 *         super.onCreate(icicle);
 *
 *         setContentView(R.layout.content_layout_id);
 *
 *         final CheckBox checkBox = (CheckBox) findViewById(R.id.checkbox_id);
 *         if (checkBox.isChecked()) {
 *             checkBox.setChecked(false);
 *         }
 *     }
 * }
 * </pre>
 *
 * <p>See the <a href="{@docRoot}guide/topics/ui/controls/checkbox.html">Checkboxes</a>
 * guide.</p>
 *  
 * <p><strong>XML attributes</strong></p> 
 * <p>
 * See {@link android.R.styleable#CompoundButton CompoundButton Attributes}, 
 * {@link android.R.styleable#Button Button Attributes}, 
 * {@link android.R.styleable#TextView TextView Attributes}, 
 * {@link android.R.styleable#View View Attributes}
 * </p>
 */
public class CheckBox extends CompoundButton {
    public CheckBox(Context context) {
        this(context, null);
    }
    
    public CheckBox(Context context, AttributeSet attrs) {
        this(context, attrs, com.android.internal.R.attr.checkboxStyle);
    }

    public CheckBox(Context context, AttributeSet attrs, int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    public CheckBox(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(CheckBox.class.getName());
    }

    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        info.setClassName(CheckBox.class.getName());
    }
}