Android OpenGLES Must use a native order direct Buffer

在调试Android OpenGL ES时候，会报Must use a native order direct Buffer错误。如下：

28427-28453/com.denny.sample4_1 E/AndroidRuntime: FATAL EXCEPTION: GLThread 165
Process: com.denny.sample4_1, PID: 28427
java.lang.IllegalArgumentException: Must use a native order direct Buffer
at android.opengl.GLES20.glVertexAttribPointerBounds(Native Method)
at android.opengl.GLES20.glVertexAttribPointer(GLES20.java:1906)
at com.denny.sample4_1.Triangle.draw(Triangle.java:64)
at com.denny.sample4_1.MyGLRender.onDrawFrame(MyGLRender.java:27)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1553)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1253)

但是在Buffer Util中已经设置了使用nativeOrder。

package com.denny.sample4_1;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;

public class BufferUtil
{
    private static ByteBuffer GetBuffer(int len,int bytes)
    {
        ByteBuffer bb=ByteBuffer.allocate(len*bytes);
        // use the device hardware's native byte order
        bb.order(ByteOrder.nativeOrder());
        return bb;
    }

    public static FloatBuffer Create(float[] arr)
    {
        FloatBuffer buffer=GetBuffer(arr.length,4).asFloatBuffer();
        // add the coordinates to the FloatBuffer
        buffer.put(arr);
        // set the buffer to read the first coordinate
        buffer.position(0);
        return buffer;
    }

    public static ShortBuffer Create(short[] arr)
    {
        ShortBuffer buffer=GetBuffer(arr.length,2).asShortBuffer();
        // add the coordinates to the FloatBuffer
        buffer.put(arr);
        // set the buffer to read the first coordinate
        buffer.position(0);
        return buffer;
    }
}

　　

解决方案：

1.ByteBuffer bb=ByteBuffer.allocate(len*bytes); 需要使用allocateDirect，而不是allocate。

2.创建ByteBuffer之后，需要调用 .order(ByteOrder.nativeOrder());使用硬件的原生的byte order。