Android external USB camera preview code, using the NDK, through the C code to open the camera.

SimpleWebCam
............\.gradle
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............\.....\gradle.xml
............\.....\misc.xml
............\.....\modules.xml
............\.....\runConfigurations.xml
............\.....\vcs.xml
............\.....\workspace.xml
............\SimpleWebCam.iml
............\app
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............\...\build
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............\...\.....\.........\......\...........\...........\.....\com
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............\...\.....\.........\......\...........\...........\.....\...\......\simplewebcam
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............\...\.....\.........\......\...........\...........\.....\...\......\............\....\BuildConfig.java
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............\...\.....\.........\......\...........\.....\...\......\............\BuildConfig.java
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............\...\.....\.........\......\.\.....\...\camera
............\...\.....\.........\......\.\.....\...\......\simplewebcam
............\...\.....\.........\......\.\.....\...\......\............\R.java
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............\...\.....\.........\......\..\androidTest
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............\...\.....\.............\.....\...\.....\......\drawable-hdpi

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