GifTextView.java

package python.gif;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.Resources.NotFoundException;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.AttributeSet;
import android.widget.TextView;

import java.io.IOException;

/**
 * A {@link TextView} which handles GIFs as compound drawables. NOTE:
 * {@code android:drawableStart} and {@code android:drawableEnd} from XML are
 * not supported but can be set using
 * {@link #setCompoundDrawablesRelativeWithIntrinsicBounds(int, int, int, int)}
 * 
 * @author koral--
 * 
 */
public class GifTextView extends TextView {

	/**
	 * @param context
	 */
	public GifTextView(Context context) {
		super(context);
	}

	/**
	 * @param context
	 * @param attrs
	 */
	public GifTextView(Context context, AttributeSet attrs) {
		super(context, attrs);
		parseAttrs(attrs);
	}

	/**
	 * @param context
	 * @param attrs
	 * @param defStyle
	 */
	public GifTextView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		parseAttrs(attrs);
	}

	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
	private void parseAttrs(AttributeSet attrs) {
		if (attrs != null) {
			Drawable left = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableLeft", 0)), right = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableRight", 0)), top = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableTop", 0)), bottom = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableBottom", 0)), start = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableStart", 0)), end = getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"drawableEnd", 0));
			setCompoundDrawablesWithIntrinsicBounds(left, top, right, bottom);

			if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
				setCompoundDrawablesRelativeWithIntrinsicBounds(start, top,
						end, bottom);
			setBackgroundInternal(getGifOrDefaultDrawable(attrs
					.getAttributeResourceValue(GifImageView.ANDROID_NS,
							"background", 0)));
		}
	}

	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
	// setBackground
	@SuppressWarnings("deprecation")
	// setBackgroundDrawable
	private void setBackgroundInternal(Drawable bg) {
		if (Build.VERSION.SDK_INT >= 16)
			setBackground(bg);
		else
			setBackgroundDrawable(bg);
	}

	@Override
	public void setBackgroundResource(int resid) {
		setBackgroundInternal(getGifOrDefaultDrawable(resid));
	}

	private Drawable getGifOrDefaultDrawable(int resId) {
		if (resId == 0)
			return null;
		final Resources resources = getResources();
		if (!isInEditMode()
				&& "drawable".equals(resources.getResourceTypeName(resId)))
			try {
				return new GifDrawable(resources, resId);
			} catch (IOException e) {
				// ignored
			} catch (NotFoundException e) {
				// ignored
			}
		return resources.getDrawable(resId);
	}

	@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
	@Override
	public void setCompoundDrawablesRelativeWithIntrinsicBounds(int start,
			int top, int end, int bottom) {
		setCompoundDrawablesRelativeWithIntrinsicBounds(
				getGifOrDefaultDrawable(start), getGifOrDefaultDrawable(top),
				getGifOrDefaultDrawable(end), getGifOrDefaultDrawable(bottom));
	}

	@Override
	public void setCompoundDrawablesWithIntrinsicBounds(int left, int top,
			int right, int bottom) {
		setCompoundDrawablesWithIntrinsicBounds(getGifOrDefaultDrawable(left),
				getGifOrDefaultDrawable(top), getGifOrDefaultDrawable(right),
				getGifOrDefaultDrawable(bottom));
	}
}