Convert a composable view into image in Jetpack Compose-CodePudding

I have a composable for example

Box(modifier){ ... }

I want to share this view as an image with other apps, that's why I have to convert this Box into an image that can be shared with other apps such as WhatsApp etc. Thank you

CodePudding user response：

Box(
modifier: BoxModifier(
    shape: BoxShape.rectangle,
    color: Colors.red,
),
child: Image.network(
    'https://picsum.photos/250?image=9',
),
);

This code converts the Box into an image that can be shared with other apps. The BoxModifier class provides a way to modify the appearance of a box, and the Image class provides a way to display images.

CodePudding user response：

You can check out this link for how to build your own capturing system

How to screenshot selectively or scrollable Composable?

You basically get view using

val view: View =  LocalView.current

then get position of your Composable using

var composableBounds by remember {
    mutableStateOf<Rect?>(null)
}

using onGloballyPositionedModifier

   Box(modifier = modifier
        .onGloballyPositioned {
            composableBounds = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                it.boundsInWindow()
            } else {
                it.boundsInRoot()
            }
        }
    ) {
        content()
    }

Then capturing image using

val bitmap = Bitmap.createBitmap(
    width,
    height,
    Bitmap.Config.ARGB_8888
)

PixelCopy, this is important, if you don't use this on Oreo and above you are likely to get crash on some devices

 PixelCopy.request(
            (this.context as Activity).window,
            bounds.toAndroidRect(),
            bitmap)

    val canvas = Canvas(bitmap)
        .apply {
            translate(-bounds.left, -bounds.top)
        }
    this.draw(canvas)
    canvas.setBitmap(null)
    bitmapCallback.invoke(ImageResult.Success(bitmap))

i also created a library that takes screenshot or screenshots in specified interval.

https://github.com/SmartToolFactory/Compose-Screenshot

Problem with mine and every other screen capture library out there is not being able to capture scrollable Composables by default.