Home | History | Annotate | Download | only in widget 
      1 /*
      2  * Copyright (C) 2006 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.widget;
     18 
     19 import android.content.Context;
     20 import android.util.AttributeSet;
     21 import android.view.accessibility.AccessibilityEvent;
     22 import android.view.accessibility.AccessibilityNodeInfo;
     23 
     24 
     25 /**
     26  * <p>
     27  * A checkbox is a specific type of two-states button that can be either
     28  * checked or unchecked. A example usage of a checkbox inside your activity
     29  * would be the following:
     30  * </p>
     31  *
     32  * <pre class="prettyprint">
     33  * public class MyActivity extends Activity {
     34  *     protected void onCreate(Bundle icicle) {
     35  *         super.onCreate(icicle);
     36  *
     37  *         setContentView(R.layout.content_layout_id);
     38  *
     39  *         final CheckBox checkBox = (CheckBox) findViewById(R.id.checkbox_id);
     40  *         if (checkBox.isChecked()) {
     41  *             checkBox.setChecked(false);
     42  *         }
     43  *     }
     44  * }
     45  * </pre>
     46  *
     47  * <p>See the <a href="{@docRoot}guide/topics/ui/controls/checkbox.html">Checkboxes</a>
     48  * guide.</p>
     49  *
     50  * <p><strong>XML attributes</strong></p>
     51  * <p>
     52  * See {@link android.R.styleable#CompoundButton CompoundButton Attributes},
     53  * {@link android.R.styleable#Button Button Attributes},
     54  * {@link android.R.styleable#TextView TextView Attributes},
     55  * {@link android.R.styleable#View View Attributes}
     56  * </p>
     57  */
     58 public class CheckBox extends CompoundButton {
     59     public CheckBox(Context context) {
     60         this(context, null);
     61     }
     62 
     63     public CheckBox(Context context, AttributeSet attrs) {
     64         this(context, attrs, com.android.internal.R.attr.checkboxStyle);
     65     }
     66 
     67     public CheckBox(Context context, AttributeSet attrs, int defStyle) {
     68         super(context, attrs, defStyle);
     69     }
     70 
     71     @Override
     72     public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
     73         super.onInitializeAccessibilityEvent(event);
     74         event.setClassName(CheckBox.class.getName());
     75     }
     76 
     77     @Override
     78     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
     79         super.onInitializeAccessibilityNodeInfo(info);
     80         info.setClassName(CheckBox.class.getName());
     81     }
     82 }
     83