GifImageButton.java

package pl.droidsonroids.gif;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.Resources.NotFoundException;
import android.os.Build;
import android.util.AttributeSet;
import android.widget.ImageButton;
import android.widget.ImageView;

import java.io.IOException;

/**
 * An {@link ImageButton} which tries treating background and src as {@link GifDrawable}
 *
 * @author koral--
 */
public class GifImageButton extends ImageButton {

    /**
     * A corresponding superclass constructor wrapper.
     *
     * @see ImageView#ImageView(Context)
     */
    public GifImageButton(Context context) {
        super(context);
    }

    /**
     * Like eqivalent from superclass but also try to interpret src and background
     * attributes as {@link GifDrawable}.
     *
     * @see ImageView#ImageView(Context, AttributeSet)
     */
    public GifImageButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        trySetGifDrawable(attrs, getResources());
    }

    /**
     * Like eqivalent from superclass but also try to interpret src and background
     * attributes as GIFs.
     *
     * @see ImageView#ImageView(Context, AttributeSet, int)
     */
    public GifImageButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        trySetGifDrawable(attrs, getResources());
    }

    @Override
    public void setImageResource(int resId) {
        setResource(true, resId, getResources());
    }

    @Override
    public void setBackgroundResource(int resId) {
        setResource(false, resId, getResources());
    }

    void trySetGifDrawable(AttributeSet attrs, Resources res) {
        if (attrs != null && res != null && !isInEditMode()) {
            int resId = attrs.getAttributeResourceValue(GifImageView.ANDROID_NS, "src", -1);
            if (resId > 0 && "drawable".equals(res.getResourceTypeName(resId))) {
                setResource(true, resId, res);
            }

            resId = attrs.getAttributeResourceValue(GifImageView.ANDROID_NS, "background", -1);
            if (resId > 0 && "drawable".equals(res.getResourceTypeName(resId))) {
                setResource(false, resId, res);
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @SuppressWarnings("deprecation")
        //new method not avalilable on older API levels
    void setResource(boolean isSrc, int resId, Resources res) {
        try {
            GifDrawable d = new GifDrawable(res, resId);
            if (isSrc) {
                setImageDrawable(d);
            } else if (Build.VERSION.SDK_INT >= 16) {
                setBackground(d);
            } else {
                setBackgroundDrawable(d);
            }
            return;
        } catch (IOException ignored) {
            //ignored
        } catch (NotFoundException ignored) {
            //ignored
        }
        if (isSrc) {
            super.setImageResource(resId);
        } else {
            super.setBackgroundResource(resId);
        }
    }
    //TODO add setImageURI
}