bitmap - view.getDrawingCache() is deprecated in Android API 28

Question

In android API 28 view.getDrawingCache() has been deprecated. Is there any newer solution to generate a Bitmap of a particular view in android.

question from:https://stackoverflow.com/questions/52642055/view-getdrawingcache-is-deprecated-in-android-api-28

Answer 1

Two ways to get bitmap of view

1. Using Canvas
2. Using Pixel Api

---

Canvas Java

public Bitmap getBitmapFromView(View view)
{
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    view.draw(canvas);
    return bitmap;
}

public Bitmap getBitmapFromView(View view,int defaultColor)
{
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    canvas.drawColor(defaultColor);
    view.draw(canvas);
    return bitmap;
}

Canvas Kotlin

open fun getBitmapFromView(view: View): Bitmap? {
    var bitmap =
        Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
    var canvas = Canvas(bitmap)
    view.draw(canvas)
    return bitmap
}

open fun getBitmapFromView(view: View, defaultColor: Int): Bitmap? {
    var bitmap =
        Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
    var canvas = Canvas(bitmap)
    canvas.drawColor(defaultColor)
    view.draw(canvas)
    return bitmap
}

Example

//@param rootView is View object which you want to get bitmap
Bitmap bitmap = getBitmapFromView(rootView);
Bitmap bitmapColored = getBitmapFromView(rootView,Color.WHITE);

PixelCopy Api

https://stackoverflow.com/a/52985554/9909365

fun getBitmapFromView(view: View, activity: Activity, callback: (Bitmap) -> Unit) {
    activity.window?.let { window ->
        val bitmap = Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
        val locationOfViewInWindow = IntArray(2)
        view.getLocationInWindow(locationOfViewInWindow)
        try {
            PixelCopy.request(window, Rect(locationOfViewInWindow[0], locationOfViewInWindow[1], locationOfViewInWindow[0] + view.width, locationOfViewInWindow[1] + view.height), bitmap, { copyResult ->
                if (copyResult == PixelCopy.SUCCESS) {
                    callback(bitmap)
                }
                // possible to handle other result codes ...
            }, Handler())
        } catch (e: IllegalArgumentException) {
            // PixelCopy may throw IllegalArgumentException, make sure to handle it
            e.printStackTrace()
        }
    }
}

For More

https://developer.android.com/reference/android/graphics/Bitmap

https://developer.android.com/reference/android/graphics/Canvas