Application of JNI layer camera in Android 2.1

As a reference for the realization of image recognition in the Java layer. It is best to find a hole in the JNI layer to extract the data.

--leon

Http://blog.csdn.net/chenji001/archive/2010/08/25/5836685.aspx

In Android, if you want to process preivew data (such as face tracking), the callback function directly on the Java layer can cause frequent memory requests and copy, even with the latest Setpreviewcallbackwithbuffer functions, Memory copy across the JNI layer is still not going to escape. In addition, our algorithm is often C, so we have to cross a layer of JNI, it is even more troublesome.

So a good way to do this is to use the camera object and the Cameralistener (inheriting class) directly under JNI. Write your own Java-layer camera to be invoked by the last application.

Not very difficult, casually recorded: