19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 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.os.Handler; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Message; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.AttributeSet; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.MotionEvent; 248a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganovimport android.view.accessibility.AccessibilityEvent; 258a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganovimport android.view.accessibility.AccessibilityNodeInfo; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.widget.RemoteViews.RemoteView; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.Map; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 3284971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * Displays a button with an image (instead of text) that can be pressed 3384971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * or clicked by the user. By default, an ImageButton looks like a regular 3484971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * {@link android.widget.Button}, with the standard button background 3584971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * that changes color during different button states. The image on the surface 3684971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * of the button is defined either by the {@code android:src} attribute in the 374e8620f868e2490782ebb960404140ea9482c91dBen Dodson * {@code <ImageButton>} XML element or by the 3884971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * {@link #setImageResource(int)} method.</p> 3984971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * 4084971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <p>To remove the standard button background image, define your own 4184971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * background image or set the background color to be transparent.</p> 4284971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <p>To indicate the different button states (focused, selected, etc.), you can 4384971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * define a different image for each state. E.g., a blue image by default, an 4484971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * orange one for when focused, and a yellow one for when pressed. An easy way to 4584971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * do this is with an XML drawable "selector." For example:</p> 4684971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <pre> 4784971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <?xml version="1.0" encoding="utf-8"?> 4884971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <selector xmlns:android="http://schemas.android.com/apk/res/android"> 4984971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <item android:state_pressed="true" 5084971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * android:drawable="@drawable/button_pressed" /> <!-- pressed --> 5184971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <item android:state_focused="true" 5284971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * android:drawable="@drawable/button_focused" /> <!-- focused --> 53aa3b5961c0142fe2fe87a5e4f67a12b3728f1beaScott Main * <item android:drawable="@drawable/button_normal" /> <!-- default --> 5484971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * </selector></pre> 5584971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * 5684971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * <p>Save the XML file in your project {@code res/drawable/} folder and then 5784971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * reference it as a drawable for the source of your ImageButton (in the 5884971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * {@code android:src} attribute). Android will automatically change the image 5984971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * based on the state of the button and the corresponding images 6084971ae0109bdfae79f3c9d15edf400fa5129f3dScott Main * defined in the XML.</p> 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 624e8620f868e2490782ebb960404140ea9482c91dBen Dodson * <p>The order of the {@code <item>} elements is important because they are 63aa3b5961c0142fe2fe87a5e4f67a12b3728f1beaScott Main * evaluated in order. This is why the "normal" button image comes last, because 64aa3b5961c0142fe2fe87a5e4f67a12b3728f1beaScott Main * it will only be applied after {@code android:state_pressed} and {@code 65aa3b5961c0142fe2fe87a5e4f67a12b3728f1beaScott Main * android:state_focused} have both evaluated false.</p> 66aa3b5961c0142fe2fe87a5e4f67a12b3728f1beaScott Main * 674c359b76f9a030f92a302ba74a528faa170bad4eScott Main * <p>See the <a href="{@docRoot}guide/topics/ui/controls/button.html">Buttons</a> 684c359b76f9a030f92a302ba74a528faa170bad4eScott Main * guide.</p> 6941ec65355bd6ded652769725b276d47c54a0d913Scott Main * 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p><strong>XML attributes</strong></p> 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * <p> 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See {@link android.R.styleable#ImageView Button Attributes}, 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link android.R.styleable#View View Attributes} 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * </p> 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project@RemoteView 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ImageButton extends ImageView { 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ImageButton(Context context) { 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, null); 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ImageButton(Context context, AttributeSet attrs) { 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(context, attrs, com.android.internal.R.attr.imageButtonStyle); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ImageButton(Context context, AttributeSet attrs, int defStyle) { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(context, attrs, defStyle); 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setFocusable(true); 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected boolean onSetAlpha(int alpha) { 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 958a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 968a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 978a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 988a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityEvent(event); 998a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov event.setClassName(ImageButton.class.getName()); 1008a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 1018a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov 1028a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov @Override 1038a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 1048a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov super.onInitializeAccessibilityNodeInfo(info); 1058a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov info.setClassName(ImageButton.class.getName()); 1068a78fd4d9572dff95432fcc4ba0e87563415b728Svetoslav Ganov } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 108