Android BitmapFactory.decodeResource读取原始图片装载成原始宽高Bitmap，Kotlin

待我称王封你为后i 2024-02-17 08:21 25阅读 0赞

### Android BitmapFactory.decodeResource读取原始图片装载成原始宽高Bitmap，Kotlin ###

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fun getOriginalBitmap(resId: Int): Bitmap {
            val options = BitmapFactory.Options()
            options.inJustDecodeBounds = true //只解析原始图片的宽高，不decode原始文件装载到内存的Bitmap。
            BitmapFactory.decodeResource(resources, resId, options)
    
            //这一阶段，最关键的是获取原始图片的真实宽高
            val srcBmpWidth = options.outWidth
            val srcBmpHeight = options.outHeight
    
            val d = ContextCompat.getDrawable(applicationContext, R.mipmap.p1)
    
            //根据原始图片的宽高创建一个空的Bitmap
            val bitmap = Bitmap.createBitmap(srcBmpWidth, srcBmpHeight, Bitmap.Config.ARGB_8888)
            val canvas = Canvas(bitmap)
            d?.setBounds(0, 0, srcBmpWidth, srcBmpHeight)
            d?.draw(canvas) //至此，bitmap即为原始图片。
    
            return bitmap
        }

[Android Drawable 转化成 Bitmap-CSDN博客文章浏览阅读1.8k次。/\*Java代码 将Drawable转化为Bitmap \*/ Bitmap drawableToBitmap(Drawable drawable) \{ int width = drawable.getIntrinsicWidth(); int height = drawable.getIntrinsicHeight(); Bitmap bitmap![favicon32.ico][]https://blog.csdn.net/zhangphil/article/details/43767535][Android Drawable _ Bitmap-CSDN_1.8k_Java_ _Drawable_Bitmap _ Bitmap drawableToBitmap_Drawable drawable_ _ int width _ drawable.getIntrinsicWidth_ int height _ drawable.getIntrinsicHeight_ Bitmap bitmap_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_43767535]

[favicon32.ico]: https://image.dandelioncloud.cn/pgy_files/images/2024/02/06/7ae5496d004d488c9ff7cd7f235ac8a7.png
[Android Drawable _ Bitmap-CSDN_1.8k_Java_ _Drawable_Bitmap _ Bitmap drawableToBitmap_Drawable drawable_ _ int width _ drawable.getIntrinsicWidth_ int height _ drawable.getIntrinsicHeight_ Bitmap bitmap_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_43767535]: https://blog.csdn.net/zhangphil/article/details/43767535