Android how can I get screenshot bitmap?

Question

To make screenshots I use this code:

Process sh = Runtime.getRuntime().exec("su", null,null);

OutputStream  os = sh.getOutputStream();
os.write(("/system/bin/screencap -p " + "/sdcard/img.png").getBytes("ASCII"));
os.flush();

os.close();
sh.waitFor();

But this is veeery slow! Maybe because phone is saving this image on storage. To get this bitmap I use this code:

bitmap = BitmapFactory.decodeFile(Environment.getExternalStorageDirectory()+         
File.separator +"img.png");

But that's pretty slow! Is possible to get bitmap but not save it? Maybe it will be much faster?

at same time 'volume-down' && 'power button' that dumps the screen storage and you should then get a 'save' dialog — Robert Rowntree, May 30 '14 at 20:05
since its not your app. you may have to pre-empt hardware buffer in fashion similar to ALSA capture for audio. — Robert Rowntree, May 30 '14 at 21:05

score 1 · Answer 1 · answered May 30 '14 at 19:36

1

here you go View.getDrawingCache() returns the currently drawn View suface.

view.setsetDrawingCacheEnabled(true);
final Bitmap screenshot = view.getDrawingCache();
view.setDrawingCacheEnabled(false);    

//use bitmap

answered May 30 '14 at 19:36

martyglaubitz

992
10
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Ahh I forgot to mention it. I want to make screenshot of another application, so I cant use your method – kubaork May 30 '14 at 19:43
And didn't you forget to mention that you have a rooted phone? – greenapps May 31 '14 at 06:21
@greenapps to use the drawing cache? no, thats an public api – martyglaubitz Jun 01 '14 at 10:16
Sorry that was addressed to @kubaork as he said "I forgot to mention". What he wants starts with a rooted phone. – greenapps Jun 01 '14 at 11:38

Android how can I get screenshot bitmap?

1 Answers1