我怎样才能从ByteBuffer短[] [英] How can I get short[] from a ByteBuffer

问题描述

我使用在Android项目，其中JNI本机功能需要很短的[]参数JNI code。但是，原来的数据被存储作为ByteBuffer的。我想转换的数据格式如下：

I am using JNI code in an Android project in which the JNI native function requires a short[] argument. However, the original data is stored as a ByteBuffer. I'm trying the convert the data format as follows.

ByteBuffer rgbBuf = ByteBuffer.allocate(size);
...    
short[] shortArray = (short[]) rgbBuf.asShortBuffer().array().clone();

但运行上面显示的code的第二行，当我遇到以下问题：

But I encounter the following problem when running the second line of code shown above:

E/AndroidRuntime(23923): Caused by: java.lang.UnsupportedOperationException
E/AndroidRuntime(23923): at Java.nio.ShortToByteBufferAdapter.protectedArray(ShortToByteBufferAdapter.java:169)

任何人都可以提出实施转化的一种手段？

Could anyone suggest a means to implement the conversion?

推荐答案

的方法做，这是一个有点古怪，其实。你可以做到如下;订货重要的是将其转换为一个短阵列。

The method do this is a bit odd, actually. You can do it as below; ordering it is important to convert it to a short array.

short[] shortArray = new short[size/2];
rgbBuf.order(ByteOrder.LITTLE_ENDIAN).asShortBuffer().get(shortArray);

此外，您可能需要使用 allocateDirect 而不是分配。

Additionally, you may have to use allocateDirect instead of allocate.

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