Difference between a clickable ImageView and ImageButton

Question

I\'m just wondering if there is any significant difference between an ImageView that\'s set to be clickable, compared with an ImageButton?

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Answer 1

ImageButton is inherited from ImageView

public class ImageButton extends ImageView {
public ImageButton(Context context) {
    this(context, null);
}

public ImageButton(Context context, AttributeSet attrs) {
    this(context, attrs, com.android.internal.R.attr.imageButtonStyle);
}

public ImageButton(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setFocusable(true);
}

@Override
protected boolean onSetAlpha(int alpha) {
    return false;
}

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

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

as @Micheal describe i just add details to his answer

Answer 2

There's no differences, except default style. ImageButton has a non-null background by default.

EDIT: Also, ImageButton.onSetAlpha() method always returns false, scaleType is set to center and it's always inflated as focusable.

Here's ImageButton's default style:

 <style name="Widget.ImageButton">
     <item name="android:focusable">true</item>
     <item name="android:clickable">true</item>
     <item name="android:scaleType">center</item>
     <item name="android:background">@android:drawable/btn_default</item>
 </style>

Answer 3

The effect of a button click when I click is there for imagebutton but not for imageView.