he library you need is called libsurfaceflinger_client.so. You can pull it from any device running Gingerbread or higher version of Android, with command
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adb pull/system/lib/libsurfaceflinger_client.so
On ICS or JB, class ScreenshotClient is part of libgui.so
. The makefile for screencap which is the example of using ScreenshotClient, suggests that linker may need other libraries:
libcutils libutils libbinder libskia libui libgui
Also, the code of screencap.cpp
goes as follows:
ScreenshotClient screenshot;if(screenshot.update()== NO_ERROR){base= screenshot.getPixels(); w= screenshot.getWidth(); h= screenshot.getHeight(); f= screenshot.getFormat(); size= screenshot.getSize();}else{constchar* fbpath="/dev/graphics/fb0";int fb= open(fbpath, O_RDONLY);if(fb>=0){struct fb_var_screeninfo vinfo;if(ioctl(fb, FBIOGET_VSCREENINFO,&vinfo)==0){...
This means that at least you must check that update() succeed. Unfortunately, unless teh device is rooted, the apps cannot be granted permission to read from /dev/graphics/fb0
and use the fallback of /system/bin/screencap
or /system/bin/screenshot
.
問題產(chǎn)生鏈接
http://stackoverflow.com/questions/12560957/how-to-use-screenshotclient-in-my-android-application
代碼閱讀鏈接
http://code.metager.de/source/xref/android/4.0.3/
android sdk java源碼
http://grepcode.com/snapshot/repository.grepcode.com/java/ext/com.google.android/android/4.4.2_r1/
相關(guān)鏈接
http://blog.sina.com.cn/s/blog_69a04cf4010173fz.html
文章標(biāo)題:androidScreenshotClient接口截屏幕
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