问题:

Is there any way to get screenshot in Android Studio (or via ADB) for Raspberry Pi 3 Model B with Android Things Developer Preview on it? (any other way not via Android Studio/ADB also accepted).

回答1:

It's not a "screenshot", but how about mp4 movie instead?

adb shell screenrecord --verbose /sdcard/screen.mp4 --time-limit 1

Though the recorded movie is not correctly recorded, it's still like a "screenshot". (I cannot get a frame out of it using QuickTime Player, but any other tool might be able to extract it.)

It seems that AndtoidThings supports old limited OpenGL version that unsupports screenshots.

01-01 00:00:10.606: I/SurfaceFlinger(148): version   : OpenGL ES-CM 1.0

01-22 02:07:02.687: E/libEGL(148): called unimplemented OpenGL ES API
01-22 02:07:02.687: E/SurfaceFlinger(148): glCheckFramebufferStatusOES error 0
01-22 02:07:02.687: E/SurfaceFlinger(148): got GL_FRAMEBUFFER_COMPLETE_OES error while taking screenshot

回答2:

You can get screenshot from Vysor application installed on chrome browser.To do this follow the procedure below.

install Vysor in chrome browser.
Connect PC with Pi using adb connect.
Open Vysor on PC and enjoy.

回答3:

You can also use the Android Device Monitor. Open it from Android Studio menu Tools -> Android -> Android Device Monitor or run it from the sdk directory sdk/tools/monitor.