如何使用改造和 Android Studio 压缩文件

Question

我正在改造库中发送图像文件，我想在将其发送到服务器之前压缩大小。

Answer 1

发送图片之前，您可以压缩图片。

我正在使用此对象将图像压缩到最大 1Mo :

/**
 * Definition of the BitmapUtils object.
 */
object BitmapUtils {
    const val ONE_KO = 1024
    const val ONE_MO = ONE_KO * ONE_KO

    /**
     * Compress, if needed, an image file to be lower than or equal to 1 Mo
     *
     * @param filePath Image file path
     *
     * @return Stream containing data of the compressed image. Can be null
     */
    fun compressedImageFile(filePath: String): InputStream? {
        var quality = 100
        var inputStream: InputStream? = null
        if (filePath.isNotEmpty()) {
            var bufferSize = Integer.MAX_VALUE
            val byteArrayOutputStream = ByteArrayOutputStream()
            try {
                val bitmap = BitmapFactory.decodeFile(filePath)
                do {
                    if (bitmap != null) {
                        byteArrayOutputStream.reset()
                        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, byteArrayOutputStream)
                        bufferSize = byteArrayOutputStream.size()
                        logD { "quality: $quality -> length: $bufferSize" }
                        quality -= 10
                    }
                } while (bufferSize > ONE_MO)
                inputStream = ByteArrayInputStream(byteArrayOutputStream.toByteArray())
                byteArrayOutputStream.close()
            } catch (e: Exception) {
                logE { "Exception when compressing file image: ${e.message}" }
            }
        }
        return inputStream
    }
}

如何使用改造和 Android Studio 压缩文件

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