[java][android] bitmap drawable resource の変換いろいろ

convertImage.java

//Resource → Bitmap
BitmapFactory.decodeResource(getResources(), R.drawable.icon);



//Resource → Drawable
getResources().getDrawable(R.drawable.icon);



/**
 * Bitmap→Drawableに変換
 * @param bitmap
 * @return BitmapDrawable
 */
public static BitmapDrawable convert(Bitmap bitmap)
{
	return new BitmapDrawable(bitmap);
}

/**
 * Drawable→Bitmapに変換
 * @param drawable
 * @return Bitmap
 */
public static Bitmap convert(Drawable drawable)
{
	return ((BitmapDrawable) drawable).getBitmap();
}