android.graphics.drawable.Animatable#isRunning()源码实例Demo

/**
 * Toggle the current button style, changing the icon
 * and animating the change if the device supports it.
 */
public void toggle() {
    // Toggle the button style
    mButtonStyle = (mButtonStyle == STYLE_NEXT) ? STYLE_DONE : STYLE_NEXT;

    // Set image drawable depending on the button style
    setImageDrawable(mButtonStyle == STYLE_NEXT ? mNextDrawable : mDoneDrawable);

    // Attempt to animate the button if we're on Lollipop or above
    if (Utils.hasLollipop()) {
        Drawable drawable = getDrawable();
        if (drawable instanceof Animatable) {
            Animatable animatable = (Animatable) drawable;
            if (animatable.isRunning()) {
                animatable.stop();
            }
            animatable.start();
        }
    }
}
 

@Override
public void onClick(View v) {
  DraweeController controller = mDraweeView.getController();
  if (controller == null) {
    return;
  }
  Animatable animatable = controller.getAnimatable();
  if (animatable == null) {
    return;
  }
  if (animatable.isRunning()) {
    animatable.stop();
  } else {
    animatable.start();
  }
}
 

/**
 * 设置开启图片
 *
 * @param drawable 开启图片
 */
public void setOpenDrawable(Drawable drawable) {
    if (mOpenDrawable == drawable)
        return;
    if (mOpenDrawable != null) {
        if (mOpenDrawable instanceof Animatable)
            ((Animatable) mOpenDrawable).stop();
        mOpenDrawable.setCallback(null);
    }
    mOpenDrawable = drawable;
    if (mOpenDrawable != null) {
        mOpenDrawable.setCallback(this);
        if (mOpenDrawable instanceof Animatable) {
            Animatable animatable = (Animatable) mOpenDrawable;
            if (!animatable.isRunning())
                animatable.start();
        }
    }
    invalidate();
}
 

/**
 * 设置错误图片
 *
 * @param drawable 错误图片
 */
public void setErrorDrawable(Drawable drawable) {
    if (mErrorDrawable == drawable)
        return;
    if (mErrorDrawable != null) {
        if (mErrorDrawable instanceof Animatable)
            ((Animatable) mErrorDrawable).stop();
        mErrorDrawable.setCallback(null);
    }
    mErrorDrawable = drawable;
    if (mErrorDrawable != null) {
        mErrorDrawable.setCallback(this);
        if (mErrorDrawable instanceof Animatable) {
            Animatable animatable = (Animatable) mErrorDrawable;
            if (!animatable.isRunning())
                animatable.start();
        }
    }
    invalidate();
}