capture bitmap from view android

Question

I have posted same question but it's in near to my problem that's why i have posted it second time

Hi i want to capture image from RelativeLayout, for that i have used below code

   captureRelativeLayout.setDrawingCacheEnabled(true);
   bitmap = captureRelativeLayout.getDrawingCache(true).copy(
                Config.ARGB_8888, false);

the problem is that when i start activity and get image from that view at that time it will work fine, but if i use it second time, the image is not being refreshed, means that previous bitmap is every time i getting.

Now if i close my activity and agian start it then i will get updated image but again not in second time :( for more information look at the can't share image properly android

What I can advice is: ... save the bitmap with a different name from time to time. Base the file name on the current time (might be enough if it's accurate to the seconds, I think. If not, use milliseconds too). — Phantômaxx, Feb 28 '14 at 13:44
Yes, what I meant: **yyyyMMdd_HHmmss**, to be exact - with your app name prepended ;) — Phantômaxx, Feb 28 '14 at 13:48
i have tried with random number with 100000 but in every new image it's storing it's previous image, the main issue is, getting the view is not refreshing — Siddhpura Amit, Feb 28 '14 at 13:50
i tried and work with captureRelativeLayout.getDrawingCache(false).copy( Config.ARGB_8888, false);if it your required answer or not let me know. — Imtiyaz Khalani, Feb 28 '14 at 14:24

score 8 · Answer 1 · edited Jun 20 '20 at 09:12

Here are two ways to convert a view to a bitmap:

Use Drawing Cache:

RelativeLayout view = (RelativeLayout)findViewById(R.id.relativelayout);
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
view.setDrawingCacheEnabled(false);

I've had some issue with the drawing cache method when the view is very large (for example, a TextView in a ScrollView that goes far off the visable screen). In that case, using the next method would be better.

Use Canvas:

RelativeLayout view = (RelativeLayout)findViewById(R.id.relativelayout);
Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Drawable bgDrawable = view.getBackground();
if (bgDrawable != null) {
    bgDrawable.draw(canvas);
} else {
    canvas.drawColor(Color.WHITE);
}
view.draw(canvas);

score 7 · Answer 2 · answered Feb 28 '14 at 14:25

You should destroy the drawing cache after copying it, so the cache will be built again next time you call getDrawingCache().

The code would look like this:

captureRelativeLayout.setDrawingCacheEnabled(true);
bitmap = captureRelativeLayout.getDrawingCache(true).copy(Config.ARGB_8888, false);
captureRelativeLayout.destroyDrawingCache();

Or like this if you don't want to enable the flag:

captureRelativeLayout.buildDrawingCache(true);
bitmap = captureRelativeLayout.getDrawingCache(true).copy(Config.ARGB_8888, false);
captureRelativeLayout.destroyDrawingCache();

Reference: https://groups.google.com/d/msg/android-developers/IkRXuMtOA5w/zlP6SKlfX-0J

score 2 · Answer 3 · answered Sep 11 '19 at 12:18

2

There is a Kotlin extension function in Android KTX:

val config: Bitmap.Config = Bitmap.Config.ARGB_8888
val bitmap = canvasView.drawToBitmap(config)

answered Sep 11 '19 at 12:18

Rathi J

849
9
16

2

where canvasView bro? – famfamfam Mar 15 '21 at 14:54

score 1 · Answer 4 · edited May 23 '17 at 12:34

finally i got solution from this view.getDrawingCache() only works once

i just forget to put

     captureRelativeLayout.setDrawingCacheEnabled(false);

i have done it by below code,

    try {
        if (bitmap != null) {
            bitmap.recycle();
            bitmap = null;
        }
        Intent sharingIntent = new Intent(Intent.ACTION_SEND);
        captureRelativeLayout.setDrawingCacheEnabled(true);
        File sdcard = Environment.getExternalStorageDirectory();
        File f = new File(sdcard, "temp.jpg");
        FileOutputStream out = null;
        out = new FileOutputStream(f);
        captureRelativeLayout.setDrawingCacheEnabled(true);
        bitmap = captureRelativeLayout.getDrawingCache(true).copy(
                Config.ARGB_8888, false);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
        out.close();
        captureRelativeLayout.setDrawingCacheEnabled(false);
        sharingIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(f)); // imageUri
        sharingIntent.setType("image/jpg");

        sharingIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(f)); // imageUri
        startActivity(Intent.createChooser(sharingIntent, "Share Image"));
    } catch (Exception e) {
        e.printStackTrace();
    }

score 1 · Answer 5 · answered Aug 25 '18 at 17:15

As DrawingCache is depracated then in kotlin:

fun View.createBitmap(): Bitmap {
    val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
    Canvas(bitmap).apply {
        background?.draw(this) ?: this.drawColor(Color.WHITE)
        draw(this)
    }
    return bitmap
}

score 0 · Answer 6 · answered Jan 27 '18 at 05:19

0

view.setDrawingCacheEnabled(true);

view.buildDrawingCache();

Bitmap bitmap = view.getDrawingCache();

"bitmap" is the final bitmap..

answered Jan 27 '18 at 05:19

dileep krishnan

326
4
7

capture bitmap from view android

6 Answers6

Use Drawing Cache:

Use Canvas:

Linked