微信分享图片压缩

WeChatUtil.kt

private const val LIMIT_SIZE = 120 * 1024

private fun getBitmapForWeChat(bitmap: Bitmap): Bitmap = bitmap.takeIf {
    bitmap.wechatSize() < LIMIT_SIZE
} ?: bitmap.scale(LIMIT_SIZE.toFloat() / bitmap.wechatSize())

private fun Bitmap.scale(scale: Float) = Bitmap.createScaledBitmap(this, (width * scale).toInt(), (height * scale).toInt(), true)
private fun Bitmap.wechatSize() = this.width * this.height
private fun Bitmap.toByteArray() = ByteArrayOutputStream().apply {
    this@toByteArray.compress(Bitmap.CompressFormat.PNG, 100, this)
}.toByteArray()