如何使用Kotlin在Android中压缩照片 [英] How to compress photo in Android with Kotlin
本文介绍了如何使用Kotlin在Android中压缩照片的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
现在这是我从智能手机拍摄照片的代码,问题是图像很大,我想压缩它,有什么帮助或想法吗?
now this is my code to take a photo from my smartphone, the problem is that the image is very large and I would like to compress it, some help or idea?
感谢信息
方法abrirCamara()的执行
Execution of the method abrirCamara()
private fun abrirCamara() {
val values = ContentValues()
values.put(MediaStore.Images.Media.TITLE, "Nueva foto")
values.put(MediaStore.Images.Media.DESCRIPTION, "Desde la camara")
image_uri = contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
//intención de la cámara
val cameraIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, image_uri)
startActivityForResult(cameraIntent, IMAGE_CAPTURE_CODE)
}
当用户从权限请求弹出窗口中按PERMIT或DENY时,调用
is called when the user press PERMIT or DENY from the permission request pop-up window
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
when(requestCode){
PERMISSION_CODE -> {
if (grantResults.size > 0 && grantResults[0] ==
PackageManager.PERMISSION_GRANTED){
//permiso de popup fue concedido
abrirCamara()
}
else{
//el permiso de popup fue denegado
Toast.makeText(this, "Permiso denegado", Toast.LENGTH_SHORT).show()
}
}
}
}
从相机意图捕获图像时呼叫
Call when the image was captured from the camera's intention
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
//Llamada cuando la imagen fue capturada desde la intención de la cámara
if (resultCode == Activity.RESULT_OK){
//configurar imagen capturada a vista de imagen (ImageView)
imgEnvio.setImageURI(image_uri)
captura_btn.visibility =View.INVISIBLE
siguiente.visibility=View.VISIBLE
}
}
推荐答案
使用压缩机
Gradle
dependencies {
implementation 'id.zelory:compressor:3.0.0'
}
压缩图像文件
val compressedImageFile = Compressor.compress(context, actualImageFile)
将图像文件压缩到特定的目标位置
Compress Image File to specific destination
val compressedImageFile = Compressor.compress(context, actualImageFile) {
default()
destination(myFile)
}
使用默认约束和自定义约束
Using default constraint and custom partial of it
val compressedImageFile = Compressor.compress(context, actualImageFile) {
default(width = 640, format = Bitmap.CompressFormat.WEBP)
}
完整的自定义约束
val compressedImageFile = Compressor.compress(context, actualImageFile) {
resolution(1280, 720)
quality(80)
format(Bitmap.CompressFormat.WEBP)
size(2_097_152) // 2 MB
}
val compressedImageFile = Compressor.compress(context, actualImageFile) {
resolution(1280, 720)
quality(80)
format(Bitmap.CompressFormat.WEBP)
size(2_097_152) // 2 MB
}
val compressedImageFile = Compressor.compress(context, actualImageFile) {
resolution(1280, 720)
quality(80)
format(Bitmap.CompressFormat.WEBP)
size(2_097_152) // 2 MB
}
val compressedImageFile = Compressor.compress(context, actualImageFile) {
resolution(1280, 720)
quality(80)
format(Bitmap.CompressFormat.WEBP)
size(2_097_152) // 2 MB
}
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