screenshots in android programmatically without actionbar

Question

I'm trying to apply this code to get a screenshot of a view without an actionbar:

 View main = findViewById(R.id.view);
Bitmap screenshot;
main.setDrawingCacheEnabled(true);
screenshot = Bitmap.createBitmap(main.getDrawingCache());
main.setDrawingCacheEnabled(false);

My question is how i can get the view if we don't have a layout,the view is set like:

setContentView(new MyView(this));

please take a look at this project: https://github.com/valerio-bozzolan/AcrylicPaint/blob/master/src/anupam/acrylic/EasyPaint.java Any help would be very appreciated!

UPDATE:

I got java.lang.NullPointerException at this line:

View v = new MyView(getBaseContext());
v.setDrawingCacheEnabled(true);
Bitmap cachedBitmap = v.getDrawingCache();
Bitmap copyBitmap = cachedBitmap.copy(Bitmap.Config.RGB_565, true); // <--- HERE

Happy new year!

You may be trying to grab the view's contents before it has rendered, especially as you don't seem to have put it anywhere yet. — Chris Stratton, Jan 04 '15 at 17:30
At minimum, wait until after you have put it on screen. And add a null check. — Chris Stratton, Jan 04 '15 at 17:48
@Chris Stratton how to get the value of MyView? is it loosing the value if we created a new instance? — New2Android, Jan 04 '15 at 17:58
Forget about trying to capture the view until you have managed to display it by setting it as or inserting it into your content view. Questions requesting code are generally closed as not fitting with the mission of the site. — Chris Stratton, Jan 04 '15 at 18:02
i think it's already displayed (line 82 https://github.com/valerio-bozzolan/AcrylicPaint/blob/master/src/anupam/acrylic/EasyPaint.java) — New2Android, Jan 04 '15 at 18:06
Your question must stand on its own, not depend on external links for its basic substance. The code *in* your question does not display your view. — Chris Stratton, Jan 04 '15 at 18:07
possible duplicate of [Android save view to jpg or png](http://stackoverflow.com/questions/3107527/android-save-view-to-jpg-or-png) — Dmitry Zaytsev, Jan 04 '15 at 19:57

score 1 · Answer 1 · answered Jan 03 '15 at 20:39

1

If you're assigning the View programmatically, then you already have it:

View view = new MyView(context);
setContentView(view);

Now you can draw contents of view into Bitmap and save it wherever you want (search for solutions, I don't think it's part of this question).

answered Jan 03 '15 at 20:39

Dmitry Zaytsev

23,650
14
92
146

it's won't crash if we write it like this ? View view = new MyView(getBaseContext()); – New2Android Jan 03 '15 at 20:40
i used View view = new MyView(getBaseContext()); and View view = new MyView(this); and it's crashed in both cases,how i can solve that please? – New2Android Jan 03 '15 at 21:08
@New2Android please provide a stacktrace of crash soI I can see what's wrong. – Dmitry Zaytsev Jan 04 '15 at 14:17
@New2Android you did not initialized drawing cache before using it. As I said - search for examples of drawing views into bitmaps. – Dmitry Zaytsev Jan 04 '15 at 18:19
I'm bored with that, i'm thinking to take the mBitmap (check the link plz)), but the background would be black (empty) , how to set the canvas as background? – New2Android Jan 04 '15 at 18:51
@New2Android sorry, you're talking completely out of context - it's not clear what's your problem at the moment. – Dmitry Zaytsev Jan 04 '15 at 19:57
Can you help me with converting the MyView to bitmap please? I tried different solutions here but always i got a crash.. Thank you! – New2Android Jan 05 '15 at 17:02
@New2Android I'm using this approach which works pretty well: http://stackoverflow.com/a/3036736/926907 – Dmitry Zaytsev Jan 05 '15 at 17:13
View v = new MyView(getBaseContext()); Bitmap copyBitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(),Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(copyBitmap); Drawable bgDrawable =v.getBackground(); if (bgDrawable!=null) bgDrawable.draw(canvas); else canvas.drawColor(Color.WHITE); v.draw(canvas);copyBitmap.compress(CompressFormat.PNG, 100, output); itried both answers but it's crashs.. what's wrong with this please? – New2Android Jan 05 '15 at 17:30
@New2Android either create another question related to your particular problem, or include stacktrace of crash to your question. We're no magicians. – Dmitry Zaytsev Jan 05 '15 at 17:40
I give up with MyView, check my solution here http://stackoverflow.com/questions/27786623/draw-over-a-white-bitmap-another-bitmap Thank you for your help Dmitry. – New2Android Jan 05 '15 at 20:01

screenshots in android programmatically without actionbar

1 Answers1