AnimatedImageButton.java 文件源码

public AnimatedImageButton(Context context, AttributeSet attrs) {
    super(context, attrs);
    //get attributes from xml
    TypedArray a = context.getTheme().obtainStyledAttributes(
            attrs,
            R.styleable.AnimatedImageButton,
            0, 0);

    try {
        if(!a.hasValue(R.styleable.AnimatedImageButton_animation))
            throw new RuntimeException("animation attribute missing from " + getClass().getSimpleName()
                    + ". This attribute is mandatory.");
        animation = AnimationUtils.loadAnimation(context, a.
                getResourceId(R.styleable.AnimatedImageButton_animation, 0));
        defaultRepeatCount = animation.getRepeatCount();
    } finally {
        a.recycle();
    }
    defaultRepeatCount = animation.getRepeatCount();
}