[Android Studio] 뷰 화면 캡쳐하기 (코틀린)

뷰 화면을 캡쳐해서 이미지 뷰에 넣어보는 기능을 추가할 때 사용하는 코드이다.

 

간단한 레이아웃 만들기. 

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">

    <data>

        <import type="android.view.View" />
    </data>

    <LinearLayout
        android:id="@+id/layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="16dp"
        android:gravity="center"
        android:orientation="vertical">

        <Button
            android:id="@+id/captureScreenShot"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Capture" />

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="200dp"
            android:layout_height="250dp"
            android:background="#ccc"
            android:padding="5dp" />
            
    </LinearLayout>
</layout>

 

 

캡쳐 기능 메소드 및 사용 코드. (canvas 를 사용.)

 

binding.captureScreenShot.setOnClickListener {
    capture()
}


private fun capture() {
    val now = SimpleDateFormat("yyyyMMdd_hhmmss").format(Date(System.currentTimeMillis()))
    val mPath = cacheDir.absolutePath + "/$now.jpg"

    var bitmap: Bitmap? = null
    val captureView = binding.captureScreenShot //캡처할 뷰
    bitmap = Bitmap.createBitmap(captureView.width, captureView.height, Bitmap.Config.ARGB_8888)

    val canvas = Canvas(bitmap)
    captureView.draw(canvas)

    if (bitmap == null) {
    
    } else {
        val imageFile = File(mPath)
        val outputStream = FileOutputStream(imageFile)
        outputStream.use {
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream)
            outputStream.flush()
        }

        binding.imageView.setImageBitmap(bitmap)

    }
}