Javascript 在Android上使用Unity ExternalTexture

我尝试使用外部纹理从Android智能手机带来带有Unity3D和JavaScript的PNG文件

SetupExternalTexture与下面相同，我得到了nativeTextureID

nativeTextureID = _activity.Call<System.Int32>("SetupExternalTexture");

public int SetupExternalTexture() {
  int textureid[] = new int[1];
  GLES20.glGenTextures(1, textureid, 0);
  UnityTextureNativeID = textureid[0];
  //String pictureDirectory = Environment.getExternalStorageDirectory() + "/Download/sa.jpg";
  String pictureDirectory = Environment.getExternalStorageDirectory() + "/Pictures/untitled.png";
  //Bitmap bitmap = BitmapFactory.decodeFile("/storage/emulated/0/Pictures/untitled.png");
  Bitmap bitmap = BitmapFactory.decodeFile(pictureDirectory);
  ByteBuffer byteBuffer = ByteBuffer.allocate(bitmap.getByteCount());
  bitmap.copyPixelsFromBuffer(byteBuffer);
  prevWidth = bitmap.getWidth();
  prevHeight = bitmap.getHeight();
  GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
  GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, UnityTextureNativeID);
  GLUtils.texImage2D(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, 0, bitmap, 0);
  //GLES20.glTexImage2D(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, 0, GLES20.GL_RGBA, prevWidth, prevHeight, 0, GLES20.GL_RGBA, GLES20.GL_UNSIGNED_BYTE, byteBuffer);
  GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
  GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
  GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
  GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);

  return UnityTextureNativeID;
}

但是，我有一个奇怪的图像。。。有人帮我吗

//怪象

//想要形象

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您不能添加您希望看到的内容吗？正常图片（.png文件）是的，但是png文件看起来像什么？这可能有助于了解颜色字节是否在移动等。我编辑！上传我想要的照片

Unity  texture = Texture2D.CreateExternalTexture(texWidth, texHeight, TextureFormat.ARGB32, false, false, new System.IntPtr(nativeTextureID));