| /* |
| * 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; |
| import android.widget.RemoteViews.RemoteView; |
| |
| |
| /** |
| * Represents a push-button widget. Push-buttons can be |
| * pressed, or clicked, by the user to perform an action. |
| |
| * <p>A typical use of a push-button in an activity would be the following: |
| * </p> |
| * |
| * <pre> |
| * public class MyActivity extends Activity { |
| * protected void onCreate(Bundle icicle) { |
| * super.onCreate(icicle); |
| * |
| * setContentView(R.layout.content_layout_id); |
| * |
| * final Button button = (Button) findViewById(R.id.button_id); |
| * button.setOnClickListener(new View.OnClickListener() { |
| * public void onClick(View v) { |
| * // Perform action on click |
| * } |
| * }); |
| * } |
| * }</pre> |
| * |
| * <p>However, instead of applying an {@link android.view.View.OnClickListener OnClickListener} to |
| * the button in your activity, you can assign a method to your button in the XML layout, |
| * using the {@link android.R.attr#onClick android:onClick} attribute. For example:</p> |
| * |
| * <pre> |
| * <Button |
| * android:layout_height="wrap_content" |
| * android:layout_width="wrap_content" |
| * android:text="@string/self_destruct" |
| * android:onClick="selfDestruct" /></pre> |
| * |
| * <p>Now, when a user clicks the button, the Android system calls the activity's {@code |
| * selfDestruct(View)} method. In order for this to work, the method must be public and accept |
| * a {@link android.view.View} as its only parameter. For example:</p> |
| * |
| * <pre> |
| * public void selfDestruct(View view) { |
| * // Kabloey |
| * }</pre> |
| * |
| * <p>The {@link android.view.View} passed into the method is a reference to the widget |
| * that was clicked.</p> |
| * |
| * <h3>Button style</h3> |
| * |
| * <p>Every Button is styled using the system's default button background, which is often different |
| * from one device to another and from one version of the platform to another. If you're not |
| * satisfied with the default button style and want to customize it to match the design of your |
| * application, then you can replace the button's background image with a <a |
| * href="{@docRoot}guide/topics/resources/drawable-resource.html#StateList">state list drawable</a>. |
| * A state list drawable is a drawable resource defined in XML that changes its image based on |
| * the current state of the button. Once you've defined a state list drawable in XML, you can apply |
| * it to your Button with the {@link android.R.attr#background android:background} |
| * attribute. For more information and an example, see <a |
| * href="{@docRoot}guide/topics/resources/drawable-resource.html#StateList">State List |
| * Drawable</a>.</p> |
| * |
| * <p>See the <a href="{@docRoot}guide/topics/ui/controls/button.html">Buttons</a> |
| * guide.</p> |
| * |
| * <p><strong>XML attributes</strong></p> |
| * <p> |
| * See {@link android.R.styleable#Button Button Attributes}, |
| * {@link android.R.styleable#TextView TextView Attributes}, |
| * {@link android.R.styleable#View View Attributes} |
| * </p> |
| */ |
| @RemoteView |
| public class Button extends TextView { |
| public Button(Context context) { |
| this(context, null); |
| } |
| |
| public Button(Context context, AttributeSet attrs) { |
| this(context, attrs, com.android.internal.R.attr.buttonStyle); |
| } |
| |
| public Button(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| super.onInitializeAccessibilityEvent(event); |
| event.setClassName(Button.class.getName()); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfo(info); |
| info.setClassName(Button.class.getName()); |
| } |
| } |